JP2016200343A - Information presentation device, information presentation method and information presentation system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To present information relevant to electric power charges to promote the execution of a preliminary air conditioning operation.SOLUTION: Since it is possible to present the fact that the performance of a preliminary air conditioning operation is sometimes more inexpensive than the non-performance of the preliminary air conditioning operation to a person responsible for electric power charges (for example, a building owner and tenant) and an operator (for example, a building manager) by presenting both a prediction result of a first electric power charge in the case of performing the preliminary air conditioning operation and a prediction result of a second electric power charge in the case of performing no preliminary air conditioning operation, the operator can be made to determine the execution of the preliminary air conditioning operation to suppress electric power use for a first time zone (DRt).SELECTED DRAWING: Figure 10

Description

  The present invention relates to an information presenting apparatus, an information presenting method, and an information presenting system, and in particular, an information presenting apparatus and an information presenting method for presenting information related to a power charge for assisting in determining whether or not to perform so-called precooling. And an information presentation system.

  2. Description of the Related Art Conventionally, attention has been focused on a demand response mechanism that suppresses power consumption only when power adjustment becomes necessary due to tight supply and demand. Demand response is a method of balancing power supply and demand by controlling power consumption instead of increasing power supply on the supply side when power demand is likely to exceed supply. There is what is called fee-based “dynamic pricing”.

  Dynamic pricing reflects the price of the electric power market in the electric power unit price for each time zone. Specifically, the electricity provider notifies the customer of the electricity rate unit price in the demand response time zone of the next day, that is, the time zone in which the use of power should be suppressed (hereinafter referred to as “DR time zone”). Then, the consumer adjusts the amount of power to be used according to the unit price of the power charge (see, for example, Patent Document 1).

  Further, for the purpose of suppressing the amount of cooling power used in the DR time zone, the room is set to have a second set temperature lower than the first set temperature in the DR time zone in the time zone before entering the DR time zone. There is a so-called precooling power adjustment method in which preliminary air conditioning operation is performed in a space.

  When pre-cooling is performed, cold air can be accumulated on the walls of the indoor space by preliminary air-conditioning operation prior to the DR time zone, so the air-conditioning operation of the air conditioner is temporarily stopped when entering the DR time zone. It is possible to suppress the use of power when the unit price of electricity is relatively high. Therefore, there is a case where the cost is reduced by performing the pre-cooling.

JP 2014-220971 A

  By the way, in order to reduce the cooling load in the DR time zone and further suppress the electric power consumption, it is necessary to maintain the precooling cold storage effect for a longer time after entering the DR time zone. For this purpose, when performing the pre-cooling, it is necessary to cool the indoor space to a second set temperature that is significantly lower than the first set temperature assumed in the DR time zone.

  However, before entering the DR time zone due to precooling, cooling the indoor space to the second set temperature that is significantly lower than the first set temperature assumed in the DR time zone is more than when precooling is not performed. However, there is a risk that the power charge bearer (for example, a building owner or tenant) or an operator (for example, a building manager) may imagine that the cost is higher when precooling is performed. If it does so, it will be reluctant to perform a precool with respect to an operator, and there existed a problem that it became difficult to suppress the electric power consumption in DR time slot | zone.

  This invention is for solving such a problem, and provides the information presentation apparatus, the information presentation method, and the information presentation system which show the information relevant to the electric power charge for accelerating | stimulating implementation of preliminary | backup air-conditioning driving | operation. It is an object.

  In order to achieve this object, the present invention provides an information presentation device (200) that presents information related to a power charge when the room temperature is controlled by an air conditioner (ac), and is intended to suppress power. The second set temperature different from the first set temperature in the first time zone (DRt) is set to the second time zone (PCt) before the set first time zone (DRt). A preliminary air conditioning operation for operating the air conditioner (ac) is performed, and a normal air conditioning operation for operating the air conditioner (ac) so as to reach the first set temperature in the first time zone (DRt) is performed. The first room temperature transition predicting the first room temperature transition of the indoor space (r1) in the target time range (ALt) including the second time zone (PCt) and the first time zone (DRt). Prediction unit (210) and place for performing the preliminary air conditioning operation A first power rate prediction unit (240) for predicting a first power rate in the target time range (ALt) based on a power rate unit price for each time zone of the target time range (ALt), and the spare A second room temperature transition prediction unit (250) for predicting a second room temperature transition of the indoor space (r1) in the target time range (ALt) when the air conditioning operation is not performed, and the case where the preliminary air conditioning operation is not performed A second power rate prediction unit (260) for predicting a second power rate in the target time range (ALt) based on a power rate unit price for each time zone of the target time range (ALt), And a prediction result presentation unit (270) for presenting the first electric power charge and the second electric power charge as prediction results.

  The present invention further includes a required time estimation unit (220) for estimating a required time (τ) required for the preliminary air conditioning operation based on the first room temperature transition, and the prediction result presentation unit (270) The start time of the preliminary air conditioning operation corresponding to the required time (τ) is presented as the prediction result together with the first power charge and the second power charge.

  In the present invention, the air conditioner (ac) is configured to maintain the first set temperature in the second time zone (PCt) and the first time zone (DRt) without performing the preliminary air conditioning operation. The actual value of the power consumption of the air conditioner (ac) corresponding to the second room temperature transition of the indoor space (r1) when operated, and the unit price of power charge for each time zone in the target time range (ALt) And a result obtaining unit (280) for obtaining the actual value of the power rate in the target time range (ALt) and a result presenting unit (290) for presenting the actual value of the power rate. To.

  In this invention, it is the information presentation method which presents the information relevant to the electric power charge in the case of controlling room temperature by an air conditioner (ac) by an information presentation apparatus (200), Comprising: The air conditioner has a second set temperature different from the first set temperature in the first time zone (DRt) in the second time zone (PCt) before the time zone (DRt) of When performing a preliminary air conditioning operation for operating (ac) and performing a normal air conditioning operation for operating the air conditioner (ac) to reach the first set temperature in the first time zone (DRt), The first room temperature transition prediction unit (210) uses the first room temperature transition prediction unit (210) to change the first room temperature transition of the indoor space (r1) in the target time range (ALt) including the second time period (PCt) and the first time period (DRt). Predicting first room temperature transition prediction step And, based on the power rate unit price for each time zone of the target time range (ALt) when performing the preliminary air conditioning operation, the first power rate prediction unit in the target time range (ALt) A first power rate prediction step predicted by (240) and a second room temperature transition of a second room temperature transition of the indoor space (r1) in the target time range (ALt) when the preliminary air conditioning operation is not performed. Based on the second room temperature transition prediction step predicted by the prediction unit (250) and the power rate unit price for each time zone of the target time range (ALt) when the preliminary air conditioning operation is not performed, the target time range ( A second power rate prediction step (260) for predicting a second power rate at (ALt) by the second power rate prediction unit (260), and predicting the first power rate and the second power rate. The presentation unit (270) to have a prediction result presentation step of presenting the resulting prediction.

  In the present invention, the air conditioning control device (100) that controls the room temperature via the air conditioner (ac) based on the set temperature of the indoor space (r1), and the first time zone (DRt) that is determined to suppress power The air conditioning control device (100) is set to a second set temperature different from the first set temperature in the first time zone (DRt) in the second time zone (PCt) before The air conditioner (ac) is operated via the air conditioning controller (100) so as to reach the first set temperature in the first time zone (DRt). When performing the normal air conditioning operation for operating (ac), the first of the indoor space (r1) in the target time range (ALt) including the second time zone (PCt) and the first time zone (DRt). The first room temperature transition prediction that predicts the room temperature transition (210) and a first power rate for predicting the first power rate in the target time range (ALt) based on the power rate unit price for each time zone of the target time range (ALt) when performing the preliminary air conditioning operation. And a second room temperature transition prediction unit that predicts a second room temperature transition of the indoor space (r1) in the target time range (ALt) when the preliminary air conditioning operation is not performed ( 250) and the second power rate for predicting the second power rate in the target time range (ALt) based on the power rate unit price for each time zone of the target time range (ALt) when the preliminary air conditioning operation is not performed. Power rate prediction unit (260) and a prediction result presentation unit (270) for presenting the first power rate and the second power rate as prediction results.

  According to the present invention, both the prediction result of the first power charge when the preliminary air-conditioning operation is performed and the prediction result of the second power charge when the preliminary air-conditioning operation is not performed are presented. To the operator (for example, building owner, tenant) or operator (for example, building manager) because it can be shown to the operator that the electricity charge may be cheaper than when the preliminary air-conditioning operation is not performed. On the other hand, the implementation of the preliminary air-conditioning operation can be determined, and the power usage in the first time zone (DRt) can be suppressed.

  According to the present invention, the required time (τ) required for the preliminary air conditioning operation is estimated based on the first room temperature transition, and the start time of the preliminary air conditioning operation corresponding to the required time (τ) is determined as the first power rate and By presenting it as a prediction result together with the second power charge, it is possible to indicate from which timing the preliminary air-conditioning operation is started, so that the operator can confirm the power charge from the start of the preliminary air-conditioning operation. Become.

FIG. 1 is a block diagram showing a configuration of an information presentation system according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the air conditioning control device in the information presentation system. FIG. 3 is a graph showing an example of a simulation result of room temperature transition prediction during precooling by the precool room temperature transition prediction unit. FIG. 4 is a graph in which a partial range of the simulation result of FIG. 3 is enlarged. FIG. 5 is a flowchart showing a prediction result presentation processing procedure by the information presentation device. FIG. 6 is a diagram illustrating an example of a unit price of power charges for each dynamic pricing time zone. FIG. 7 is a graph illustrating an example of prediction results of power transition prediction and room temperature transition prediction during precooling by the information presenting apparatus. FIG. 8 is a graph showing an example of a change in the unit price of power charges before and after the DR start time. FIG. 9 is a graph illustrating an example of prediction results of power transition prediction and room temperature transition prediction during non-precooling by the information presentation device. FIG. 10 is a diagram illustrating an example of a prediction result screen that compares the prediction result of the pre-cooling power charge with the prediction result of the non-pre-cooling power charge. FIG. 11 is a flowchart showing a procedure for presenting results by the information presentation device. FIG. 12 is a diagram illustrating an example of a result result screen showing a result value of a non-precooling power charge by the information presenting apparatus. FIG. 13 is a diagram illustrating an example of a prediction result result screen showing a prediction result of a pre-cooling power charge, a prediction result of a non-pre-cooling power charge, and a result value of a non-pre-cooling power charge by the information presentation device. .

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Principle of invention 1>
It was noted that there are cases where saving energy costs (power charges) is more important for building owners and building managers than saving energy.

  Therefore, an appropriate timing for starting the pre-cooling is predicted, and a display for prompting the operator (for example, a building manager) to perform the pre-cooling is performed in advance. At the same time, based on the unit price of power charges in the precool time zone and DR time zone, the room temperature transition prediction and power rate prediction when precooling is performed, and the room temperature transition prediction and power rate prediction when precooling is not performed are presented. To do.

  Or, at the time of pre-cooling contract decision, after predicting (assuming) a reasonable timing when the pre-cooling recommender starts pre-cooling, the room temperature transition when pre-cooling is performed based on the unit price of power charges in the pre-cooling time and DR time Prediction, power rate prediction, and room temperature transition prediction and power rate prediction when pre-cooling is not performed are presented.

  In any of the above cases, if the unit price of the power charge in the pre-cooling period is lower than the unit price of the power charge in the DR time period, there is a possibility that the energy cost (power charge) can be reduced by performing the pre-cooling. In this case, the building manager can decide whether or not to perform the pre-cooling based on his / her own judgment, so that the introduction of the power adjustment function and the resistance to practical use can be reduced, and the decision to perform the pre-cooling can be easily made. In other words, while the preconception that “pre-cooling does not save energy costs” can be reduced, it is possible to maintain that the building manager has the authority to select the implementation, so that it becomes easier to accept.

<Principle of invention 2>
In particular, for the case where no pre-cooling was performed, the above-mentioned prediction of “when no pre-cooling is performed” and the result of not performing it were executed, and the steps to get the reliability of the prediction function itself were executed. Further preferred. Since the administrator can learn cases that are easy to predict (or cases that are difficult to predict), an effect of improving the execution selection ability of the execution selection authority can be expected.

<Configuration of information presentation system>
As shown in FIG. 1, an information presentation system 1 according to an embodiment of the present invention includes an air conditioning control device 100 and an information presentation device 200 that presents information related to a power rate when operating air conditioning. Yes.

<Configuration of air conditioning control device>
The air conditioning control apparatus 100 controls the air conditioner ac installed in the indoor space r1. The air conditioning control device 100 is connected to an air supply temperature sensor S1 provided at the fan outlet of the air conditioner ac and a room temperature sensor S2 installed in the indoor space r1.

  As shown in FIG. 2, the air conditioning control device 100 includes an air supply temperature information acquisition unit 100a, a room temperature information acquisition unit 100b, an air conditioner information acquisition unit 100c, an air conditioning operation information input unit 100d, an air conditioning performance value calculation unit 100e, An output unit 100f is provided.

  The supply air temperature information acquisition unit 100a represents information indicating the measured value of the supply air temperature A [° C.] of the current air supplied to the indoor space r1 from the fan outlet of the air conditioner ac detected by the supply air temperature sensor S1. (This is hereinafter referred to as “supply air temperature measurement value information”).

  The room temperature information acquisition unit 100b acquires information representing the room temperature measurement value D [° C.] of the current indoor space r1 detected by the room temperature sensor S2 (hereinafter referred to as “room temperature measurement value information”). It is.

  The air conditioner information acquisition unit 100c receives various types of information related to the air conditioner ac (hereinafter referred to as “air conditioner information”) from a controller (not shown) of the air conditioner control apparatus 100 that operates the air conditioner ac. It is a functional part to acquire.

Here, the air conditioner information includes the current air conditioner fan power θ [kW] of the air conditioner ac, the air conditioner fan power (rated) θp [kW] at the maximum cooling for operating the air conditioner ac at the maximum output, and the indoor space r1. In advance by the relationship between the indoor volume R [m ³ ], the target room temperature C [° C.] at the time of completion of pre-cooling input by the operator via the air conditioning operation information input unit 100d, and the air conditioning fan power θ [kW] of the air conditioner ac. Maximum air conditioning corresponding to the air transport amount S (θ) [m ³ / min] by the air conditioning fan of the air conditioner ac associated with the table and the air conditioning fan power (rated) θp [kW] at the maximum cooling of the air conditioner ac This is various information representing the air conveyance amount S (θp) [m ³ / min] at the time.

  The air conditioning performance value calculation unit 100e allows the air conditioning controller 100 to maintain the set temperature of the DR time zone in the target time range (described later) including the DR time zone without performing precooling by the air conditioner ac. This is a functional unit that calculates actual values such as room temperature transition of the indoor space r1 when the ac is actually operated and controlled, power consumption, and power charges. Hereinafter, the set temperature in the DR time zone may be referred to as the first set temperature.

  The output unit 100f includes a supply air temperature information representing the supply air temperature A [° C.] acquired by the supply air temperature information acquisition unit 100a, and a room temperature measurement representing the current room temperature measurement value D [° C.] acquired by the room temperature information acquisition unit 100b. The information presentation apparatus 200 includes the commission information, the air conditioner information acquired by the air conditioner information acquisition unit 100c, and the information related to the actual value calculated by the air conditioning actual value calculation unit 100e (hereinafter referred to as “actual value information”). To output.

  Such an air conditioning control device 100 is realized by installing a computer program (software) in a computer (hardware) including a CPU (Central Processing Unit), a memory, an interface, and the like. The functions of the information acquisition unit 100b, the air conditioner information acquisition unit 100c, the air conditioning operation information input unit 100d, the air conditioning performance value calculation unit 100e, and the output unit 100f are such that various hardware resources of the computer and the computer program cooperate. It is realized by.

<Configuration of information presentation device>
The information presentation apparatus 200 includes a precool room temperature transition prediction unit 210, a precool required time estimation unit 220, a precool effect time estimation unit 230, a precool power rate prediction unit 240, a non-precool room temperature transition prediction unit 250, a non-precool power rate prediction unit 260, A prediction result presentation unit 270, a result acquisition unit 280, and a result presentation unit 290 are provided.

  The pre-cooling room temperature transition prediction unit 210 performs pre-cooling by the maximum cooling capacity that allows the air-conditioner ac to be operated at the maximum output during the time period when pre-cooling is performed as the preliminary air-conditioning operation (hereinafter referred to as “pre-cooling time period PCt”). It is a functional unit that predicts the room temperature transition of the temperature drop when it is carried out. Hereinafter, the set temperature of the precool time zone PCt may be referred to as a second set temperature.

  The pre-cooling required time estimation unit 220 is set at the target room temperature C [° C.] that is the second set temperature at the completion of the pre-cool lower than the first set temperature of the DR time period DRt at the end of the pre-cool time period PCt. This is a functional unit that estimates the precooling required time τ required for air conditioning control of the space r1.

  Here, the start timing of the DR time zone DRt is set as the DR start time, and the end timing of the DR time zone DRt is set as the DR end time. Further, the start timing of the precool time zone PCt is set as the precool start time, and the end timing of the precool time zone PCt is set as the precool time end. Note that the precool end time and the DR start time coincide with each other, but the DR start time may be set after a predetermined time has elapsed from the precool end time.

  If the precooling required time estimation unit 220 can estimate the precooling required time τ, the precooling required time τ can be obtained as a time that is a precooling required time τ before the DR start time (precool end time) of the DR time period DRt. it can. The precooling required time estimation unit 220 outputs precool start time point information indicating the precool start time point to the precool power rate prediction unit 240, the non-precool power rate prediction unit 250, and the prediction result presentation unit 270.

  When the air conditioning control device 100 stops the operation of the air conditioner ac at the end of the precool (that is, the DR start time), the precool effect time estimation unit 230 (the air conditioning fan power θ of the air conditioner ac = 0.0 [kW]) The return time τr required for the room temperature at the end of the precooling to return to the first set temperature in the DR time period DRt.

  The pre-cooling power rate prediction unit 240 is a time zone from the prediction start time one hour before the pre-cool start time of the pre-cool time zone PCt to the DR end time of the DR time zone DRt (hereinafter referred to as “target time range ALt”). The power in the target time range ALt when the pre-cooling is performed based on the power consumption indicated by the air-conditioning fan power θ [kW] of the air conditioner ac in each time zone and the power rate unit price in each time zone. It is a functional unit that calculates charges.

  In this case, the target time range ALt for predicting the power rate when the pre-cooling is performed is defined as the time range from the prediction start time one hour before the pre-cool start time to the DR end time. The time range from the precool start time to the DR end time may be set as the target time range two hours before the precool start time. In short, the target time range ALt including at least the time range from the pre-cool start time to the DR end time may be used.

  The non-precool room temperature transition predicting unit 250 maintains the first set temperature of the DR time period DRt without performing precooling by the air conditioner ac in the same target time range ALt as when precooling is performed. Reference numeral 100 denotes a functional unit that predicts the room temperature transition of the indoor space r1 when the normal air conditioning operation of the air conditioner ac is controlled.

  The non-precool power rate prediction unit 260 performs air-conditioning control so as to maintain the first set temperature in the DR time zone DRt without performing precooling in the same target time range ALt as when performing precooling in the precool time zone PCt. It is a functional unit that predicts a power charge when the apparatus 100 causes the air conditioner ac to perform a normal air conditioning operation.

  The prediction result presentation unit 270 generates the prediction result screen data based on the precool start time information, the precooling power charge information and the non-precooling power charge information in the target time range ALt, and displays this on the display panel (not shown). It is a functional part to be displayed.

  The performance acquisition unit 280 is configured so that the air conditioning controller 100 maintains the first set temperature of the DR time zone DRt without performing the precooling in the same target time range ALt as when the precooling is performed. This is a functional unit that acquires the actual value calculated by the actual air conditioning value calculation unit 100e when the normal air conditioning operation is actually controlled via the output unit 100f.

  The result presentation unit 290 is a functional unit that generates result screen data based on the result value acquired by the result acquisition unit 280 and displays the result screen data on the display panel.

  In such an information presentation apparatus 200, functions of each unit are realized by installing a computer program (software) in a computer (hardware) including a CPU, a memory, an interface, and the like. That is, the function of each unit in the information presentation apparatus 200 is realized by the cooperation of various hardware resources of a computer and a computer program.

<Prediction method by information presentation device>
Subsequently, an actual prediction method performed by the information presentation apparatus 200 will be described using specific numerical values. Here, in order to simplify the description, symbols are defined as follows.

Current measured value A [° C] of supply air temperature, current air conditioner fan power θ [kW] of air conditioner ac, air conditioner fan power θp [kW] during maximum cooling of air conditioner ac, air by air conditioner ac air conditioner fan Conveyance amount S (θ) [m ³ / min], air conveyance amount S (θp) [m ³ / min] at maximum cooling, precool target room temperature C [° C.] at the completion of precooling, current room temperature measurement value D [ [° C.], estimated value E [° C. m ³ / min] of the heat generation energy amount in the indoor space r1, estimated room temperature F [° C.], required pre-cooling time τ [min] until reaching the target temperature C at the completion of the pre-cooling, The indoor volume R [m ³ ] of the indoor space r1 is set as a unit time Δt [min] for sequential calculation.

Here, if it is assumed that the indoor space r1 is in a thermal equilibrium state at the present time (before the start of precooling), the heat generation energy amount estimated value E can be estimated as in the relationship of the following (formula 1) for convenience. Note that the unit of the heat generation energy amount estimation value E is simply expressed as a product of a unit volume per unit time and a unit temperature for convenience.
E = (D−A) S (θ) [° C. m ³ / min] ……………………………………………… (Formula 1)

If the air mixing rate is expressed as a mathematical expression that is proportional to the temperature difference in the same manner as the heat conduction, the room temperature change based on the maximum cooling capacity at the time of pre-cooling is expressed by the following relationships (Expression 2) to (Expression 5). Note that “ΔF / Δt” means a change in room temperature per unit time Δt (ΔF = (F′−F)), and “F ′” is an arbitrary time t when the pre-cooling is performed. Is the estimated room temperature.
RΔF / Δt = − (FA) S (θp) + E ………………………………………… (Formula 2)
R (F′−F) / Δt = − (FA) S (θp) + E (Equation 3)
F ′ = F + {− (FA) S (θp) + E} Δt / R (Equation 4)
F ′ = F + {− (FA) S (θp) + (DA) S (θ)} Δt / R (Equation 5)

  In the sequential calculation of (Expression 2) to (Expression 5) described above, if the initial value of the room temperature estimation value F is the room temperature measurement value D, the room temperature estimation value F ′ can be calculated by a simple simulation. According to (Formula 2) to (Formula 5), it is possible to incorporate a condition change prediction such as the current supply air temperature measurement value A [° C.] to calculate the room temperature estimation value F ′.

Actually, since (Expression 5) can be converted into mathematical expressions as shown in (Expression 6) to (Expression 8) below, as shown in (Expression 9) and (Expression 10), The temperature at which the room temperature finally converges (hereinafter referred to as “convergence temperature”) G can be estimated.
F ′ = F + {− (FA) S (θp) + E} Δt / R (Equation 6)
F ′ = F {1−S (θp) Δt / R} + {A + E / S (θp)} {S (θp) Δt / R} (Expression 7)
F ′ = F {1−Δt / T} + GΔt / T ……………………………………………… (Formula 8)
T = R / S (θp) ……………………………………………………………………… (Formula 9)
G = A + E / S (θp) = A + (DA) S (θ) / S (θp) (Equation 10)

Therefore, using the time constant T and the convergence temperature G, the estimated room temperature F ′ at an arbitrary time t can be obtained by the following (Equation 11).
F ′ (t) = D + (GD) {1-exp (−t / T)} ………………………… (Formula 11)

  In this way, the precool room temperature transition prediction unit 210 uses (Equation 11) to indicate that the indoor space r1 will be the room temperature indicated by the estimated room temperature F ′ at an arbitrary time t in the precool time zone PCt. Can be predicted by sequential calculation.

In this case, if the estimated room temperature F ′ at time t in (Equation 11) is replaced with the target room temperature C [° C.] at the end of precooling, and the time t is replaced with the required precooling time τ, the precooling requirement is obtained based on (Equation 11). The time estimation unit 220 can obtain the following (Formula 12) for calculating the precooling required time τ.
τ = −T · ln {1- (CD) / (GD)} …………………………………… (Formula 12)

  In this case, the pre-cooling required time estimation unit 220 calculates the supply air temperature measurement value A [° C.] included in the convergence temperature G of (Equation 12) as a constant value. Although condition change prediction cannot be included, the amount of calculation can be reduced. Practically, it is desirable to adjust in advance the value of the time constant T of the room temperature change so as to match the actual room temperature change. The precooling required time estimation unit 220 outputs the precooling required time τ to the precooling power rate prediction unit 240.

  By the way, the return time τr estimated by the precool effect time estimation unit 230 is also a precool effect time during which the effect of lowering the room temperature due to precooling from the precool end time, that is, the DR start time, and during this time the normal air conditioning operation of the air conditioner ac is performed. It is also a power suppression time during which power can be suppressed by stopping.

Since this return time τr is the time during which the air conditioner ac is stopped, when the air conditioner fan power θ [kW] is 0.0 [kW], the convergence temperature G becomes A [° C.], and The pre-cooling required time τ can be replaced with the return time τr and expressed by the following (formula 13). The precool effect time estimation unit 230 outputs the return time τr to the precool power rate prediction unit 240.
τr = −T · ln {1- (CD) / (AD)} …………………………………… (Formula 13)

  Thus, the pre-cooling power charge prediction unit 240 performs the normal air-conditioning operation in the power charge when performing the pre-air conditioning operation in the pre-cooling time period PCt and the DR time period DRt (remaining time obtained by subtracting the return time τr from the DR time). Can be obtained respectively.

  Accordingly, the precool power rate prediction unit 240 obtains a precool time power rate in the entire target time range ALt including the precool time zone PCt and the DR time zone DRt, and represents information indicating the precool time power rate (hereinafter referred to as “precool time”). To the prediction result presentation unit 270.

  On the other hand, the non-precool room temperature transition prediction unit 250, for example, when the air conditioning control device 100 causes the air conditioner ac to perform the normal air conditioning operation so as to maintain the first set temperature 25 [° C.] of the DR time period DRt from beginning to end. As a result, a prediction result without temperature change that is maintained at 25 [° C.] is obtained.

  The non-precool power rate prediction unit 260 uses the amount of power based on the air conditioning fan power θ [kW] of the air conditioner ac that maintains the first set temperature 25 [° C.] of the DR time period DRt (air conditioning fan power θ [kW] × The non-precool power charge is calculated based on the time of all the target time ranges ALt and the power charge unit price for each time zone in the target time range ALt, and information indicating the non-precool power charges (hereinafter referred to as “ This is referred to as “non-pre-cooling power charge information”) to the prediction result presentation unit 270.

<Simulation>
Next, a simulation example of the room temperature transition prediction of the room temperature estimated value F ′ based on specific numerical values and the precool required time τ will be described. In order to verify the estimation formulas of (Equation 1) to (Equation 12), a simulation 1 in a state where there is no heating material such as a human being or an electronic device in the indoor space r1, and a state in which there is a heating material in the indoor space r1 The description will be divided into simulation 2.

<Simulation 1 without heat generation>
From the stopped state in which no heat is generated in the indoor space r1 and the cooling operation by the air conditioner ac is not performed, the cooling operation is performed with the air conditioning fan power θp [kW] having the maximum cooling capacity during the precooling in the precooling time zone PCt. Check when to start.

The conditions of the simulation 1 are as follows: current supply air temperature measurement value: A [° C.] = 18.0 [° C.], current air conditioner fan power: θ [kW] = 0.0 [kW] (air conditioner ac is Air conditioner fan power at maximum cooling: θp [kW] = 10.0 [kW], air transport amount by air conditioner fan of air conditioner ac: S (θ) [m ³ /min]=0.0 [m ³ / min], air conveyance amount at maximum cooling: S (θp) [m ³ /min]=1.0 [m ³ / min], current room temperature measurement value: D [° C.] = 25.0 [° C.] (room temperature of the current indoor space r1 when the air conditioner ac is stopped), indoor volume: R [m ³ ] = 100.0 [m ³ ] (5.0 m × 8.0 m × height 2 0.5 m), unit time: Δt = 1.0 [min].

Under the conditions of simulation 1, (Expression 1), (Expression 9), (Expression 10), (Expression 11), and (Expression 12) are expressed by the following (Expression 14) to (Expression 18). .
E = (D−A) S (θ) = (25.0−18.0) × 0.0 = 0.0 [° C. m ³ / min] (Formula 14)
T = R / S (θp) = 100.0 / 1.0 = 100.0 [min] (Equation 15)
G = A + E / S (θp) = 18.0 + 0.0 / 1.0 = 18.0 [° C.] (Equation 16)
F ′ (t) = D + (GD) {1-exp (−t / T)}
= 25.0 + (18.0-25.0) {1-exp (-t / 100.0)} (Formula 17)
τ = −T · ln {1- (CD) / (GD)} = − 100.0 · ln {1- (C-25.0) / (18.0-25.0)} ………………………………………………… (Formula 18)

  As shown in the simulation results of FIGS. 3 and 4, the pre-cooling room temperature transition prediction unit 210 uses, for example, the estimated room temperature F ′ = 24.0 after about t = 15 minutes according to (Equation 17) as shown in the simulation results of FIGS. ° C], for example, t = about 34 minutes later, the estimated room temperature F ′ = 23.0 [° C.], t = about 56 minutes later, the estimated room temperature F ′ = 22.0 [° C.], and t = about After 360 minutes, it can be estimated that the temperature falls to the room temperature estimated value F ′ = 18.2 (substantially the same as the supply air temperature measurement value A [° C.] = 18.0 [° C.]).

  Further, when the target room temperature C [° C.] at the completion of the pre-cooling is 24.0 [° C.], the pre-cooling required time estimation unit 220 estimates that the pre-cooling required time τ is 15 minutes according to (Equation 18). Can do. That is, it can be estimated that 15 minutes before the DR start time is the precool start time.

<Simulation 2 in the presence of exothermic material>
Subsequently, the maximum cooling at the time of performing the pre-cooling from the state in which the heat generation exists in the indoor space r1 and the air-conditioning control is performed to the current room temperature measurement value D [° C.] = 25.0 [° C.] by the air conditioner ac. The case where the room temperature of the indoor space r1 is further lowered by the capacity air conditioning fan power θp [kW] will be confirmed.

As conditions for the simulation 2, the current supply air temperature measurement value: A [° C.] = 18.0 [° C.], the current air conditioner fan power: θ [kW] = 5.0 [kW] (the air conditioner ac is Operating state), air conditioner fan power at maximum cooling: θp [kW] = 10.0 [kW], air conveyance amount by air conditioning fan of air conditioner ac: S (θ) [m ³ /min]=0.5 [m ³ / min], air conveyance amount at maximum cooling: S (θp) [m ³ /min]=1.0 [m ³ / min], current room temperature measurement value: D [° C.] = 25.0 [° C.] (current installation temperature of the indoor space r1 when the air conditioner ac is operating), indoor volume: R [m ³ ] = 100.0 [m ³ ] (5.0 m × 8.0 m × high) 2.5 m), unit time: Δt = 1.0 [min].

Under the conditions of the simulation 2, (Expression 1), (Expression 9), (Expression 10), (Expression 11), and (Expression 12) are expressed by the following (Expression 19) to (Expression 23). .
E = (D−A) S (θ) = (25.0−18.0) × 0.5 = 3.5 [° C. m ³ / min] (Equation 19)
T = R / S (θp) = 100.0 / 1.0 = 100.0 [min] (Equation 20)
G = A + E / S (θp) = 18.0 + 3.5 / 1.0 = 21.5 [° C.] (Equation 21)
F ′ (t) = D + (GD) {1-exp (−t / T)}
= 25.0 + (21.5-25.0) {1-exp (-t / 100.0)} (Formula 22)
τ = −T · ln {1- (CD) / (GD)} = − 100.0 · ln {1- (C-25.0) / (21.5-25.0)} ………………………………………………… (Formula 23)

  In the pre-cooling room temperature transition prediction unit 210, under the conditions of simulation 2, as shown in the simulation results of FIG. 3 and FIG. 4, according to (Equation 22), for example, the estimated room temperature F ′ = 24.0 after t = about 34 minutes. [C], for example, t = about 85 minutes later, the room temperature estimated value F ′ = 23.0 [° C.], for example, t = about 195 minutes later, the room temperature estimated value F ′ = 22.0 [° C.] Can be estimated.

  Further, when the target room temperature C [° C.] at the completion of the pre-cooling is 24.0 [° C.], the pre-cooling required time estimation unit 220 estimates that the pre-cooling required time τ is 34 minutes according to (Equation 23). Can do. That is, it can be estimated that 34 minutes before the DR start time is the pre-cool start time.

[Prediction result presentation operation]
Next, the prediction result presentation operation by the information presentation apparatus 200 will be described with reference to the flowchart of FIG.

  The operator has a DR time zone DRt in which the power unit price of the power rate is high due to the dynamic pricing of the demand response is 13: 00 to 17:00, and the demand response level (0 to 4) as shown in FIG. Assume that it is recognized in advance that the unit price of the power charge changes in the range from 15 yen / kWh to 150 yen / kWh. In the precool time zone PCt before entering the DR time zone DRt, the same power rate unit price of 15 yen / kWh as the demand response level 1 is applied.

  In addition, in the state where the heat generating material exists in the indoor space r1, the first setting of the DR time zone DRt is performed when the precooling is performed using the air conditioner ac with the air conditioner fan power θp = 1 [kW] at the maximum cooling. It is assumed that the temperature is lowered from the current room temperature measurement value D (for example, 27 [° C.) to the second set temperature (23 [° C.]) that is lowered by 4 [° C.] from the temperature (for example, 27 [° C.]). In this case, it is assumed that the precooling required time τ of about 60 minutes is required at the air conditioner fan power θp = 1 [kW] at the maximum cooling.

  Furthermore, the air-conditioning control apparatus 100 controls the air conditioner ac and performs pre-cooling from the pre-cooling start time of the pre-cooling time zone PCt, and at the time of pre-cooling end, the temperature is 4 [ After setting the indoor space r1 to the second set temperature (23 [° C.]) lower than the [° C.], the operation of the air conditioner ac is stopped and the first set temperature (27 Assume that about 60 minutes are required for the return time τr until the room temperature returns to [° C.].

  Here, it is assumed that the output of the air conditioner ac for maintaining the indoor space r1 at the first set temperature (27 [° C.]) is 40% (0.4 [kW]). At the time of pre-cooling for 60 minutes (12:00 to 13:00), the air conditioner fan power θp = 1 [kW] at maximum cooling, and the electricity charge unit price of 15 yen for demand response level 0 with the lowest electricity charge Assume that / kWh applies. It is assumed that when the air conditioner ac is completely stopped (13: 0 to 14:00) for 60 minutes from the start of the subsequent DR, the power charge unit price of demand response level 3 is 100 yen / kWh. Furthermore, it is assumed that the power charge unit price of 100 yen / kWh at demand response level 3 is applied to the subsequent 14:00 to 17:00.

<Step SP1: Estimation of precool start time>
The indoor space r1 may be set to the second set temperature 23 [° C.] of the precool time zone PCt that is lowered by 4 [° C.] from the first set temperature (27 [° C.]) of the DR time zone DRt. When pre-defined as appropriate, the pre-cooling required time estimation unit 220 calculates the pre-cooling required time τ (60 minutes) and estimates the pre-cooling start time based on the pre-cooling required time τ (step SP1).

<Step SP2: Pre-cooling effect time estimation>
After that, at the end of the pre-cooling, the indoor space r1 has been set to the second set temperature (23 [° C.]) that is 4 [° C.] lower than the first set temperature (27 [° C.]) of the DR time zone DRt. After that, when the air conditioner ac is shut down, the return time τr (60 minutes) until the room temperature returns to the first set temperature (27 [° C.]) of the DR time zone DRt due to the influence of the heat generation material is precooled. The time is estimated by the precool effect time estimation unit 230 (step SP2).

<Step SP3: Prediction of room temperature transition during pre-cooling>
FIG. 7 shows the room temperature transition of the indoor space r1 in the target time range ALt from the precool start time when the precool is performed in the precool time period PCt to the DR end time of the DR time period DRt. (Step SP3).

  In this case, the room temperature measurement value D = 27 [° C.] at the start of the pre-cooling, but after 60 minutes, the second temperature lower by 4 [° C.] than the first set temperature 27 [° C.] of the DR time zone DRt. Since the cooling operation of the air conditioner ac is stopped after the temperature drops to the set temperature 23 [° C.], the room temperature measurement value D gradually increases from there, and after 60 minutes, the first set temperature 27 [ [C] again.

<Step SP4: Prediction of power charges during pre-cooling>
At this time, the power consumption also increases to the air conditioner fan power θp = 1.0 [kW] at the maximum cooling for 60 minutes from the precool start time to the precool end time in the precool time zone PCt, and then the air conditioner ac The air conditioner fan power θ decreases to 0.0 [kW] from the time when the cooling operation is stopped until it returns to the first set temperature 27 [° C.] of the DR time zone DRt, and thereafter the DR time zone DRt In order to maintain the first set temperature 27 [° C.], the precool power rate prediction unit 240 predicts that the air conditioner fan power θ = 0.4 [kW].

  As shown in FIG. 8, the power rate unit price is 15 yen / kWh at the time of pre-cooling, while the power rate unit price is 100 yen / kWh after the start of DR, and the target time is based on this power rate unit price. The pre-cooling power rate in the range ALt is predicted by the pre-cooling power rate prediction unit 240 (step SP4).

  As a specific calculation, at 11:00 to 12:00 one hour before the start of the pre-cooling, the room temperature of the indoor space r1 is 27% at 40% (0.4 [kW]) of the power consumption 1 [kW]. In order to maintain the temperature at [° C.], it will be 6 yen, 40% of the unit price of 15 yen / kWh.

  At 12:00 to 13:00, which is the pre-cooling time zone PCt, the room temperature of the indoor space r1 is lowered by 4 [° C.] at 100% of the power consumption 1 [kW]. It will be 15 yen.

  In the subsequent DR time period DRt, from 13:00 to 14:00, the room temperature gradually returns from 23 [° C.] to 23 [° C.] at 0% of the power consumption 1 [kW] by stopping the air conditioner ac. It will be 0 yen, 0% of the unit price of 100 yen / kWh.

  Further, at 14:00 to 17:00 in the DR time zone DRt, the room temperature of the indoor space r1 is set to 27% by the normal air conditioning operation of the air conditioner ac at 40% (0.4 [kW]) of the power consumption 1 [kW]. In order to maintain the temperature at [° C.], 40% of the unit price of 100 yen / kWh is 40 yen. Thus, the pre-cooling power charge in the target time range ALt is 141 yen in total.

<Step SP5: Prediction of room temperature transition during non-precool>
Thereafter, in the same target time range ALt as when precooling is performed, the air conditioner ac maintains the first set temperature (27 [° C.]) of the DR time zone DRt without performing precooling by the air conditioner ac. The room temperature transition of the indoor space r1 as shown in FIG. 9 when controlling the air conditioning operation is predicted by the non-precool room temperature transition prediction unit 250 (step SP5).

  In this case, the non-precool room temperature transition prediction unit 250 causes the air conditioner ac to perform a normal air conditioning operation so as to maintain the first set temperature 27 [° C.] of the DR time zone DRt from beginning to end, for example. Obtains the prediction result of the room temperature transition with no temperature change maintained at 27 [° C.].

<Step SP6: Prediction of power rate at non-precool>
At this time, the power consumption is maintained at the first set temperature 27 [° C.] throughout the target time range ALt, so that the air conditioner fan power θ = 0.4 [kW] is assumed to be a non-precool power rate prediction. Predicted by the unit 260.

  In the non-precool time zone NPCt that is the same time zone as the precool time zone PCt, the power rate unit price is 15 yen / kWh, whereas in the DR time zone DRt, the power rate unit price is 100 yen / kWh. Based on this, the non-precool power rate information is predicted by the non-precool power rate prediction unit 260 when maintaining the first set temperature 27 [° C.] of the DR time zone DRt by the normal air conditioning operation of the air conditioner ac (step SP6). ).

  As a specific calculation in this case, at 11:00 to 12:00 one hour before the pre-cool start time, 40% (0.4 [kW]) of power consumption 1 [kW] In order to maintain the room temperature at the first set temperature 27 [° C.], the electric power unit price is 15 yen / kWh, which is 6 yen, which is 40%.

  In the non-precool time zone NPCt of 12:00 to 13:00, the room temperature of the indoor space r1 is 27 [° C.] at 40% (0.4 [kW]) of the power consumption 1 [kW] without performing the precool. Therefore, the electric power unit price is 15 yen / kWh, 40% of 6 yen.

  Also in the subsequent DR time zone DRt 13: 00 to 17:00, the room temperature of the indoor space r1 is set to the first set temperature 27 [° C.] at 40% (0.4 [kW]) of the power consumption 1 [kW]. Therefore, the electric power unit price is 100 yen / kWh, which is 40% of 40 yen. Thus, the non-precool power charge in the target time range ALt is 172 yen in total.

<Step SP7: Display of prediction result>
The prediction result presentation unit 270 displays the prediction result screen G1 corresponding to the prediction result screen data generated based on the precool start time information, the precooling power charge and the non-precooling power charge in the target time range ALt as a prediction result on the display panel. Display (step SP7).

  As shown in FIG. 10, on the prediction result screen G1, it is displayed that the target time range ALt is 11:00 to 17:00, and the precool time zone is displayed by the display frame PCtk indicating the range of the precool time zone PCt. It is displayed that PCt is precool start time 12:00 to precool end time 13:00.

  In addition, on the prediction result screen G1, the prediction result of the pre-cooling power charge when the pre-cooling is performed is displayed in detail for each time zone of the target time range ALt, and the total amount is displayed. At the same time, the prediction result of the non-precooling power rate when the precooling is not performed is displayed in detail for each time zone of the target time range ALt, and the total amount is displayed.

  Therefore, the operator can visually recognize the prediction result screen G1 and can intuitively recognize that the person who performs the pre-cooling is lower in cost than the power charge level when the pre-cooling is not performed. Can easily decide to implement. As a result, the use of power in the DR time zone DRt by the air conditioner ac can be suppressed.

<Result results presentation action>
<Step SP11: Acquisition of the result of a non-precool>
After that, as shown in FIG. 11, the result acquisition unit 280 maintains the first set temperature of the DR time period DRt in the same target time range ALt as when the precool is performed without performing the precool. The actual value calculated by the air conditioning actual value calculation unit 100e when the air conditioning control device 100 actually controls the normal air conditioning operation by the air conditioner ac is acquired (step SP11).

<Step SP12: Display the result of the non-precool>
And the result presentation part 290 displays the result result screen G2 corresponding to the result screen data produced | generated based on the result value acquired by the result acquisition part 280 on a display panel as a result result (step SP12).

  As shown in FIG. 12, the result result screen G2 displays that the target time range ALt is 11:00 to 17:00 as in the prediction result screen G1. Further, in the result result screen G2, when the air-conditioning control device 100 actually controls the normal air-conditioning operation so as to actually maintain the first set temperature 27 [° C.] in the DR time period DRt without performing pre-cooling. The actual result of the non-pre-cooling power rate is displayed in detail for each time zone of the target time range ALt, and the total amount is displayed.

  The operator can compare both the non-precool power charge at the time of prediction and the non-precool power charge at the time of prediction by confirming the result result screen G2 after confirming the prediction result screen G1. The certainty of the result can be confirmed.

  In addition, the operator compares both the prediction result screen G1 and the result result screen G2, so that various conditions such as a time zone and a set temperature when the prediction result and the result result are substantially the same, the prediction result and the result. Since it is possible to learn various conditions such as a time zone and a set temperature when the results are far from each other, it is possible to appropriately determine whether or not to perform precooling according to the various conditions.

<Effect>
As described above, the information presentation apparatus 200 of the information presentation system 1 uses the prediction result screen G1 to display information related to the power charge that is a measure for saving energy costs when the pre-cooling is performed and when the pre-cooling is not performed. It was presented so that it could be intuitively understood. Accordingly, it is possible to assist the operator in determining whether or not to perform precooling, and to make the operator easily determine whether to perform precooling. Therefore, it is possible to suppress power usage in the DR time period DRt.

  In addition, the information presentation apparatus 200 can present a case where the electricity charge is cheaper when the precool is performed on the prediction result screen G1 than when the precool is not performed, Can reduce the prejudice that "does not save energy costs". As a result, the information presentation apparatus 200 can make an agreement on the pre-cooling through the prediction result screen G1, and thus can function as an agreement formation support apparatus.

  Furthermore, the information presenting apparatus 200 displays both the prediction result screen G1 and the result result screen G2 and allows the operator to visually check, so that the prediction result of the non-precool power rate when the precool is not performed and the nonprecool The reliability of the prediction function can be understood by comparing the results of hourly electricity charges.

  Furthermore, since the information presentation apparatus 200 allows the operator to visually check the precool start time corresponding to the precool required time τ using the display frame PCtk, the timing of the precool start and the precool have been performed. It is possible to make the operator recognize the change in the electricity rate from time to time.

<Other embodiments>
In the above-described embodiment, the case where the prediction result screen G1 and the result result screen G2 are displayed separately has been described. However, the present invention is not limited to this, as shown in FIG. You may make it produce | generate and display the prediction performance result screen G3 of the state which merged the prediction result screen G1 and the performance result screen G2.

  In this case, the result presentation unit 90 acquires the pre-cooling power rate information and the non-pre-cooling power rate information, generates the predicted result screen data together with the result value acquired by the result acquisition unit 280, and performs prediction. What is necessary is just to display the prediction performance result screen G3 corresponding to performance screen data on a display panel as a prediction performance result.

  In the above-described embodiment, the case has been described in which information for determining whether or not to perform pre-cooling as the preliminary air conditioning operation is presented as the prediction result screen G1, but the present invention is not limited thereto. Instead, information for determining whether or not to perform preheating as the preliminary air conditioning operation may be presented as a prediction result screen.

  Furthermore, in the above-described embodiment, the case where the present invention is applied to the information presentation system 1 based on the “dynamic pricing” based on the electricity rate has been described. However, the present invention is not limited to this, and the DR time zone DRt May be applied to an information presentation system based on incentive-based “dynamic pricing” in which an incentive according to the amount of reduction in power consumption is given.

  DESCRIPTION OF SYMBOLS 1 ... Information presentation system, 100 ... Air conditioning control apparatus, 100a ... Supply air temperature information acquisition part, 100b ... Room temperature information acquisition part, 100c ... Air conditioner information acquisition part, 100d ... Air conditioning operation information input part, 100e: Air conditioning performance value calculation unit, 100f: Output unit, 200: Information presentation device, 210: Precool room temperature transition prediction unit, 220: Precool required time estimation unit, 230: Precool effect time estimation unit, 240 …… Precool electricity rate prediction unit, 250 …… Non-precool room temperature transition prediction unit, 260 …… Non-precool electricity rate prediction unit, 270 …… Prediction result presentation unit, 280 …… Result acquisition unit, 290 …… Results presentation unit.

Claims (5)

An information presentation device for presenting information related to a power charge when controlling the room temperature by an air conditioner,
The second set temperature is different from the first set temperature in the first time zone in a second time zone before the first time zone in which power suppression is determined. When performing a preliminary air conditioning operation for operating the air conditioner and performing a normal air conditioning operation for operating the air conditioner to reach the first set temperature in the first time zone, the second time zone and the second time zone A first room temperature transition prediction unit that predicts a first room temperature transition of the indoor space in a target time range including one time zone;
A first power rate prediction unit that predicts a first power rate in the target time range based on a power rate unit price for each time zone of the target time range when performing the preliminary air conditioning operation;
A second room temperature transition prediction unit that predicts a second room temperature transition of the indoor space in the target time range when the preliminary air conditioning operation is not performed;
A second power rate prediction unit that predicts a second power rate in the target time range based on a power rate unit price for each time zone of the target time range when the preliminary air conditioning operation is not performed;
An information presentation apparatus comprising: a prediction result presentation unit that presents the first power charge and the second power charge as prediction results. A required time estimating unit that estimates a required time for the preliminary air conditioning operation based on the first room temperature transition;
The prediction result presentation unit presents the start time of the preliminary air conditioning operation corresponding to the required time as the prediction result together with the first power charge and the second power charge. The information presentation device described. The second of the indoor space when the air conditioner is operated so as to maintain the first set temperature in the second time zone and the first time zone without performing the preliminary air conditioning operation. A result acquisition unit that acquires the actual value of the power charge in the target time range based on the actual value of the power consumption of the air conditioner corresponding to the room temperature transition and the power charge unit price for each time zone in the target time range When,
The information presentation device according to claim 1, further comprising: a result presentation unit that presents a result value of the power charge. An information presentation method for presenting information related to a power charge when controlling a room temperature by an air conditioner by an information presentation device,
The second set temperature is different from the first set temperature in the first time zone in a second time zone before the first time zone in which power suppression is determined. When performing a preliminary air conditioning operation for operating the air conditioner and performing a normal air conditioning operation for operating the air conditioner to reach the first set temperature in the first time zone, the second time zone and the second time zone A first room temperature transition prediction step of predicting a first room temperature transition of the indoor space in a target time range including one time zone by a first room temperature transition prediction unit;
A first power charge in which a first power charge prediction unit predicts a first power charge in the target time range based on a power charge unit price for each time zone in the target time range when the preliminary air conditioning operation is performed. A prediction step;
A second room temperature transition prediction step of predicting, by a second room temperature transition prediction unit, a second room temperature transition of the indoor space in the target time range when the preliminary air conditioning operation is not performed;
Second power for predicting the second power rate in the target time range by the second power rate prediction unit based on the unit price of power rate for each time zone in the target time range when the preliminary air conditioning operation is not performed. A price prediction step;
A prediction result presentation step of presenting the first power charge and the second power charge as prediction results by a prediction result presentation unit. An air conditioning control device for controlling the room temperature via an air conditioner based on the set temperature of the indoor space;
The second set temperature is different from the first set temperature in the first time zone in a second time zone before the first time zone in which power suppression is determined. Normal air conditioning in which a preliminary air conditioning operation is performed to operate the air conditioner via the air conditioning control device, and the air conditioner is operated via the air conditioning control device so as to reach the first set temperature in the first time zone. When performing driving, a first room temperature transition prediction unit that predicts a first room temperature transition of the indoor space in a target time range including the second time zone and the first time zone;
A first power rate prediction unit that predicts a first power rate in the target time range based on a power rate unit price for each time zone of the target time range when performing the preliminary air conditioning operation;
A second room temperature transition prediction unit that predicts a second room temperature transition of the indoor space in the target time range when the preliminary air conditioning operation is not performed;
A second power rate prediction unit that predicts a second power rate in the target time range based on a power rate unit price for each time zone of the target time range when the preliminary air conditioning operation is not performed;
An information presentation system comprising: a prediction result presentation unit that presents the first power charge and the second power charge as prediction results.

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