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WO2022074440A1 - Refroidisseur par adsorption intelligente à cycles multiples pour températures ambiantes élevées - Google Patents

Refroidisseur par adsorption intelligente à cycles multiples pour températures ambiantes élevées Download PDF

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Publication number
WO2022074440A1
WO2022074440A1 PCT/IB2020/059538 IB2020059538W WO2022074440A1 WO 2022074440 A1 WO2022074440 A1 WO 2022074440A1 IB 2020059538 W IB2020059538 W IB 2020059538W WO 2022074440 A1 WO2022074440 A1 WO 2022074440A1
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WO
WIPO (PCT)
Prior art keywords
chiller
cycle
condenser
refrigerant
adsorbent
Prior art date
Application number
PCT/IB2020/059538
Other languages
English (en)
Inventor
Ayman ADNAN S. ALMAAITAH
Ahmad ATALLAH FARIS ALSARAYREH
Motasim M. R. ALDAOUR
Original Assignee
Precision Industries
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Precision Industries filed Critical Precision Industries
Priority to PCT/IB2020/059538 priority Critical patent/WO2022074440A1/fr
Publication of WO2022074440A1 publication Critical patent/WO2022074440A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B17/00—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type
    • F25B17/08—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a solid, e.g. salt
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/04—Arrangement or mounting of control or safety devices for sorption type machines, plants or systems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00—Adapting or protecting infrastructure or their operation
    • Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

Definitions

  • the present invention relates to a low-grade heat driven adsorption chiller that utilizes multiple thermodynamic cycle modes achieving the best performance in high ambient temperatures as an air-cooled chiller.
  • the chiller has a smart controller based on ambient conditions that uses one set of chiller components to operate them in at least four basic modes and cycles. The alternation between these modes is achieved via controlling the heating and cooling water flow to the two generator beds in addition to opening and closing a motorized ball valve controlling the refrigerant gas flow between the two generator beds.
  • the aim of the controller is to choose the most suitable cycle mode and cycle periods to obtain the best performance according to the cooling water temperature allowing for air cooled chiller at high ambient temperatures.
  • Embodiments of the invention are specifically designed for a chiller which is easy to manufacture and maintain. Embodiments are also disclosed detailing certain components of the chiller allowing efficient and optimum operation with low cost manufacturing.
  • Adsorption chillers are gaining attention for the fact that they can utilize hot and cold sources of energy at variable temperatures without the fear of crystallization as it is the case in Lithium Bromide absorption chillers.
  • the limitations of the existing adsorption chillers are based on their low Coefficient of Performance (COP) at high cooling source temperature which is usually associated with ambient conditions of temperature and humidity. As such, in hot and humid ambient the existing adsorption chillers rm poorly or not at all.
  • COP Coefficient of Performance
  • the present invention illustrates a smart chiller that selects from the multiple cycles and cycle-steps period based on the ambient condition to achieve a good COP for high cooling temperature up to 50 °C or higher. Furthermore, the present invention does not need four generators which means a favorable cost reduction. The description of the cycle modes is described, and embodiments of the chiller and its components are also included.
  • the present invention relates to a method and apparatus of a smart adsorption chiller that operates on various cycle modes with variable cycle-step period allowing the chiller to operate at high ambient temperature and watercooling temperatures with optimum efficiency.
  • a device of the present invention operates at high cooling water temperature that none of the existing adsorption chillers can operate on.
  • the present invention comprises the components of the chiller in addition to the algorithm controlling the cycle modes and cycle-steps period to achieve the optimum performance.
  • the chiller comprises of two adsorbent beds interconnected via a motorized ball valve that opens and closes allowing the refrigerant gas to flow between the two beds, an innovative condenser design allowing for efficient condensation and accumulation of condensed refrigerant, four innovative low pressure drop non-return valves, two of them are located in the condenser and one in each of the adsorbent beds, an evaporate to cool the chilled water and a solenoid valve controlling the refrigerant flow from the evaporator to the condenser.
  • the adsorbent beds are connected to the evaporator and the condenser via four gas ducts to separate the adsorbent beds from the evaporator and the condenser for better thermal insulation purpose.
  • the invention uses three levels of water temperatures flowing to and from the chiller controlled by a set of three-way valves connected to the inlet and outlet of each adsorbent bed.
  • the three levels of water temperature are the hot water temperature coming from the heat source, the chilled water temperature flowing in and out of the evaporator forming the output of the chiller, and the cooling water temperature which is related to the ambient conditions especially for air cooled chiller.
  • the invention also comprises a controller that manages the chiller to operate in four basic cycle modes to obtain the optimum performance based on the cooling water temperature.
  • the first cycle mode is the single stage cycle in which the ball valve is kept close and the chiller operates on the standard adsorption cycle for low cooling temperatures; for example, for a zeolite-water pair if the cooling water is less than 30 °C.
  • the second cycle mode is the shortperiod regeneration cycle in which the motorized ball valve opens for a short period (for the zeolite-water pair it is less than a minute) allowing for the equalization of the two adsorbent bed pressure before going to the next cycle step.
  • This second cycle mode is optimum for relatively moderate cooling water temperature; for a zeolite-water pair this cycle is good when cooling water temperature is between 30 °C- 37 °C.
  • the third cycle mode is the long-period regeneration cycle mode in which the motorized ball valve opens for a long period (longer than the short-period regeneration cycle mode) allowing for more flow of gases from the heated adsorbent bed to the cooled adsorbent bed.
  • This cycle mode is optimum for high cooling water temperature; for zeolite-water pair this is good when cooling water temperature is between 37 °C- 48 °C.
  • the fourth cycle mode is the two - stage cycle mode in which a two-stage thermal compression of the refrigerant is obtained with only two adsorbent beds.
  • Figurel a is illustrating a first embodiment of the chiller as seen from the outside with front view showing the motorized ball valve (M) relative to the other components of the chiller.
  • Figurel b is illustrating a first embodiment of the chiller as seen from the outside with back view showing the solenoid valve (S) relative to the other components of the chiller.
  • Figure 2a is illustrating an exploded view of the condenser (C) assembly showing details of the separation plate (6), drainage holes (K & J), non-return valves (2) and other components.
  • Figure 2b is illustrating the cross section of the condenser (C) showing the bend in the lower plate (1 ) to form accumulation chamber of the condensate refrigerant and the location of the separation plate (6) relative to other components.
  • Figure 3 is illustrating an exploded view of any of the adsorbent beds (B1 & B2) assembly with all of its components relative to each other.
  • Figure 4 is illustrating an exploded view of the Evaporator (E) assembly with all of its components relative to each other.
  • Figure 5 is illustrating an exploded view of each of the low pressure drop None Return Valves (NRV) assembly with all of its components relative to each other.
  • NSV None Return Valves
  • the present invention illustrates a method and apparatus to a smart adsorption chiller that can operate on various cycle modes, while using the same components, to optimize the performance of the chiller for various ambient conditions.
  • the chiller uses the temperature of the cooling water returning from the heat sink (usually it is related to the ambient conditions) to decide which cycle mode to operate on and what are the cycle-steps period.
  • the invention illustrates the method and the apparatus to allow optimum performance even for high ambient temperatures and high humidity resulting and high cooling water temperature especially for air-cooled systems.
  • Such chiller can operate in high temperature high humidity conditions in which no existing adsorption chillers can operate with acceptable performance.
  • the details of the chiller components and embodiments and the method of operation are described herein.
  • the external view of the main chiller components are shown in Figures 1 a and 1 b.
  • the chiller comprises of two adsorption beds (B1 and B2) interconnected via a motorized ball valve (M) that opens and closes according to the controller algorithm.
  • M motorized ball valve
  • Each of the adsorbent beds (B1 and B2) is connected to the condenser (C) from the top and the evaporator (E) from the bottom by four gas ducts (D).
  • the condenser (C) there is an accessibility plug for vacuuming and charging of the chiller with the refrigerant.
  • adsorbent beds (B1or B2), and the evaporator (E) are shown in Figures 2, 3, and 4 respectively.
  • Cooling water coming from the heat sink source enters the heat exchanger in the condenser through the water pipe concoction (W1 ).
  • the chilled water goes into the evaporator heat exchanger through the water pipe connection (W4).
  • the hot water from the heat source and the cooling water from the heat sink enter the heat exchanger in the adsorbent bed (B1 ) through the water pipe connection (W2).
  • hot and cooling water enters the heat exchanger in the adsorbent bed (B2) through the water pipe connection (W3).
  • a set of three-way valves at the inlet and outlet of each water pipes connection (W2 &W3) controls the flow of hot and cooling water into each adsorbent bed heat exchangers. These three-way valves are not shown in embodiments of Figure 1 a for simplicity.
  • Figures 2a illustrates an exploded view of the condenser (C) assembly showing the details of its components and their relative position to each other.
  • figure 2b shows a cross section of the condenser with the directions of the refrigerant gases flow from the adsorbent bed (B1 or B2) to the condenser.
  • the second type of fluid is the cooling water from the heat sink source (for example the dry cooler) entering the heat exchanger (9) through the inlet of water pipe connection (W1 ) and leaving through the outlet of this connection.
  • the nonreturn valves (2) allow the refrigerant gases to flow from either of the adsorbent beds (B1 ) or (B2) to the condenser but do not allow gases to flow back from the condenser to the adsorbent beds.
  • the details of the non-return valves (NRVs) (2) are shown in Figure 5 as part of this invention.
  • the condenser (C) comprises of two interconnected champers, one is the passage chamber containing the passages of refrigerant gases from the adsorbent beds (B1 &B2) through the ducts and the non-return while the other chamber contains the heat exchanger to condensate the refrigerant gases and an accumulation chamber for the condensate.
  • the details are illustrated in figures 2a and 2b.
  • gas flow guide (6) which forces the refrigerant gases to flow to the top of the heat exchanger (9) so that the gases do not condensate around the non-return valves which can affect their performances.
  • the gas flow guide (6) has drainage holes demonstrated in (K) in figure 2a (Detail K) allowing for any condensate in the vicinity of the non- return valve to be drained to the accumulate part of the bottom plate (1 ).
  • the bottom plate (1 ) is sloped to drain condensate from the vicinity of the NRVs (2) to the accumulation chamber formed by the sloped shape of the bottom plate (1 ) as shown in figure 2b.
  • This accumulation chamber collects condensate mainly dropping from the heat exchanger (9) after the refrigerant gases cools down by the heat exchanger and condenses.
  • any condensation of the refrigerant gases around the non-return valves flow to the accumulation chamber through the drainage holes shown in (K) and (J) of Figure 2a.
  • the top plate (10) seals the condenser from the top while holding the accessibility plug (P) which is sealed in regular operation and opens to be connected to a vacuum pump initially or for charging with the refrigerant.
  • the support (7) has holes in it to allow the water connection pipes (W1 ) of the heat exchanger to pass through them while support (8) does not have holes in it.
  • Support (5) acts also as a separator between the non-return valves to optimize gases flow and pressure distribution inside the condenser.
  • the side plates (3) and (4) from both sides complete the enclosure of the condenser.
  • the top Plate (10) rests on the supports (8), (7) and (5) while its welded with the bottom plate (1) and side plates (3 & 4) to form the sealed enclosure of the condenser.
  • the condenser allows for the refrigerant gases to flow from the adsorbent bed to the condenser with minimum pressure drop and to flow in a fashion so that it condenses and accumulate in the accumulation chamber without affecting the performance of the non-return valve.
  • FIG. 3 illustrates an exploded view of any of the adsorbent beds (B1 & B2) assembly as their components are identical and their operation is in tandem with each other based on the controller algorithm.
  • Each adsorbent bed comprises an absorber/ disrober thermo-conductive body (16) with water pipe connection (W2), a non-return valve (12), a bottom plate enclosure (11 ), a protection plate (15), a top cover plate (17), a front plate (13) and a back plate (14).
  • the adsorber/disrober thermo-conductive body comprises a thermo-conductive body holding adsorbent in a thermo-conductive manner to the heat exchanger.
  • the method of holding the adsorbent depends on the chosen type of the adsorbent/refrigerant pair. For example, for a zeolite/water pair the method described in US 2009/0090491 can be used while other pairs can have other methods.
  • hot water flows through (W2) the adsorbent heats up rejecting the refrigerant and rising the pressure in the adsorbent bad.
  • cooling water flows through (W2) the adsorbent adsorbs the refrigerant lowering the pressure in the adsorbent bed.
  • the flow of hot and cooling water to (W2) is controlled by the said three-way valves based on the algorithm of the controller described hereafter.
  • the details of the non-return valve with low pressure drop (12) are shown in Figure 5.
  • This nonreturn valve is resting on the bottom plate (11 ) which has circular holes for gases flow not shown in Figure 3.
  • the bottom plate is connected to the evaporator (E) via a gas duct (D) as shown in Figures 1.a and 1.b.
  • gas duct D
  • protection plate (15) is to prevent any fall out of the adsorbent material on the none-return valve (12) which may affect its performance.
  • the top plate (17) is connected to the non-return valve of the condenser (2) via another gas duct (D) as shown in Figures 1.a & 1.b.
  • D gas duct
  • Plates (11 ), (13), (14), and (17) are welded together to form the enclosure of the adsorbent bed.
  • the adsorber/desorber body is surrounded by supports for rigidity purposes.
  • the purpose of the upper and lower ducts (D) is to separate the adsorbent beds from the condenser and the evaporator to get efficient thermal insulation without the need of especial insulation materials in vacuum conditions. These details are the same and identical for both adsorbent beds (B1 ) and (B2).
  • FIG 4 illustrate the embodiment of the evaporator assembly which has the purpose of cooling down the chilled water entering the heat exchanger (19) through the pipe opening (W4).
  • the heat exchanger (19) should be immersed in the refrigerant fluid entering the evaporator through the hole shown in the flooded plate (18) forming the bottom and the sides of the evaporator.
  • the evaporated refrigerant flows through the holes in the upper plate (24) to either the adsorbent bed (B1 ) or (B2) depending on whichever is in a vacuum at a lower pressure than that of the evaporator through the corresponding ducts and NRV.
  • the heat exchanger (19) is held in pace by the supports (22) and (23) and the entire assembly is enclosed by the front and bottom plates (20) and (21 ) with (18) on bottom and (24) on tope as shown.
  • FIG (5) illustrates the embodiment of one of the low pressure drop Non Return Valves (NRV).
  • NAV Non Return Valves
  • the valve is comprised of flexible disc (28) resting on a perforated plate (29) and surrounded by protective plate (28).
  • the perforated plate (29) can be part of plate (1 ) in Figure 2a or plate (11 ) in Figure 3.
  • the center of the flexible disc is held in place via the bolt (30), washer (26) and nut (25).
  • the smart chiller is controlled via a smart controller that chooses between three categories of cycles depending on the cooling water temperature. Each cycle will have its own time based on the smart chiller sensation of chilling effect. Basically, there are multiple cycles which can be divided in three categories.
  • the first category is low cooling water cycle operating on basic single stage adsorption cycle; the second category is intermediate cooling temperature cycles operating on adsorption cycle with regeneration for various periods.
  • the third category is when the chiller operates at high cooling water temperature operating on a two-stage chiller cycle.
  • Each category can be of multiple cycles according to the adsorbent pair and chiller scale. For example, we will describe two cycles in the intermediate category resulting in a four cycles descriptions as described below.
  • the first category for low cooling water temperature cycle is low cooling water cycle operating on basic single stage adsorption cycle.
  • the second category is intermediate cooling temperature cycles operating on adsorption cycle with regeneration for various periods.
  • the third category is when the chiller operates at high cooling water temperature operating on a two-stage chiller cycle.
  • This cycle is chosen when the cooling water temperature is low (for example for the zeolite-water pair it is less than 30 °C). This is the basic adsorption cycle described in US 2010/0293989 A1.
  • valve (M) is kept closed all the time, cooling water flows into the condenser through pipe (W1 ) and chilled water flows into the evaporator through pipe (W4).
  • the cycle is composed of two steps, in the first step the three-away valves allow hot water to flow into adsorbent bed (B1 ) through pipe (W2) while cooling water enters adsorbent bed (B2) through pipe (W3).
  • (B1 ) will cause (B1 ) to desorb the refrigerant gases elevating its pressure and forcing the gases to flow into the condenser to be condensed and flows to the evaporator through valve (S).
  • (B2) will adsorb the refrigerant gases reducing the pressure inside it forcing the refrigerant to flow from the evaporator to (B2) through the NRV.
  • the three-way valves revers their action to allow hot water flows into adsorbent bed (B2) through pipe (W3) while cooling water enters adsorbent bed (B1 ) through pipe (W2).
  • the second category for medium to high cooling water temperature cycle with regeneration is chosen when the cooling water temperature is intermediate (for example for the zeolite-water pair it is between 31 °C and 47°C).
  • This cycle includes a regeneration intermediate step with a time depending on the cooling water temperature.
  • valve (M) opens for a period depending on the cooling water temperature.
  • the cycle is composed of four steps as follows:
  • Step 1 Valve (M) is closed, cooling water flows into the condenser through pipe (W1) and chilled water flows into the evaporator through pipe (W4).
  • the three-away valves allow hot water to flow into adsorbent bed (B1 ) through pipe (W2) while cooling water enters adsorbent bed (B2) through pipe (W3).
  • This will cause (B1 ) to desorb the refrigerant gases elevating its pressure and forcing the gases to flow into the condenser to be condensed and flows to the evaporator through valve (S).
  • (B2) will adsorb the refrigerant gases reducing the pressure inside it forcing the refrigerant to flow from the evaporator to (B2) through the NRV.
  • Step 2 Valve (M) opens for certain time allowing the high pressure hot gases to flow from adsorber bed (B1 ) to adsorber bed (B2) where mass and heat transfer occurs as a regeneration step. This will reduce the pressure and refrigerant concentration in B1 while increase the pressure and refrigerant concentration in B2 preparing the system for the next step.
  • the time of this step depends on the cooling water temperature. For example for the for example for the zeolite-water pair when cooling water temperature is between 31 °C and 37°C the valve (M) opens for 15 seconds (this is referred to as the short regeneration cycle) while when the cooling water temperature is between 38 °C-47 °C the valve (M) opens for 30 seconds (this is referred to as the long regeneration cycle).
  • Step 3 Valve (M) is closed; the three-way valves revers their action to allow hot water to flow into adsorbent bed (B2) through pipe (W3) while cooling water enters adsorbent bed (B1 ) through pipe (W2).
  • This will cause (B2) to desorb the refrigerant gases elevating its pressure and forcing the gases to flow into the condenser to be condensed and flows to the evaporator through valve (S).
  • (B1 ) will adsorb the refrigerant gases reducing the pressure inside it forcing the refrigerant to flow from the evaporator to (B1) through the NRV.
  • Step 4 Valve (M) opens for certain time allowing the high pressure hot gases to flow from adsorber bed (B2) to adsorber bed (B1 ) where mass and heat transfer occurs as a regeneration step. This will reduce the pressure and refrigerant concentration in B2 while increase the pressure and refrigerant concentration in B1 preparing the system for the next step.
  • the time of this step depends on the cooling water temperature. For example for the for example for the zeolite-water pair when cooling water temperature is between 31 °C and 37 °C the valve (M) opens for 15 seconds (this is referred to as the short regeneration cycle) while when the cooling water temperature is between 38 °C- 47 °C the valve (M) opens for 30 seconds (this is referred to as the long regeneration cycle).
  • the third category for ultra-high cooling water temperature two stage cycle is chosen when the cooling water temperature ultra high (for example for the zeolite-water pair it is above 48 °C).
  • This cycle is a two-stage cycle where the increasing of refrigerant pressure occurs in two stage to compensate for the low temperature difference between the cooling and heating water temperature.
  • the flow of the refrigerant to the condenser occurs only from one adsorber bed (for example B1 ) while flow of refrigerating gasses from the evaporator occurs to the other adsorbent bed (for example B2).
  • This cycle is for lower temperature difference between cooling water temperature and heating water temperature.
  • the cycle is composed of four steps as follows:
  • Step 1 Valve (M) is closed, cooling water flows into the condenser through pipe (W1) and chilled water flows into the evaporator through pipe (W4).
  • the three-away valves allow hot water to flow into adsorbent bed (B1 ) through pipe (W2) while cooling water enters adsorbent bed (B2) through pipe (W3). This will cause (B1 ) to desorb the refrigerant gases elevating its pressure and forcing the gases to flow into the condenser to be condensed and flows to the evaporator through valve (S).
  • (B2) will adsorb the refrigerant gases reducing the pressure inside it forcing the refrigerant to flow from the evaporator to (B2) through the NRV.
  • the concentrator of refrigerant in (B1 ) will be low while that in (B2) will be high.
  • Step 2 Valve (M) is opens up allowing for the pressures in (B1 ) and (B2) to reach to an intermediate pressure between the condenser and the evaporator.
  • the three-way valves revers their action to allow hot water to flow into adsorbent bed (B2) through pipe (W3) while cooling water enters adsorbent bed (B1 ) through pipe (W2).
  • This will cause (B2) to desorb the refrigerant gases elevating its pressure while (B1 ) will adsorb the refrigerant gases and lower its pressure forcing the gases to flow from (B2) to (B1 ) lowering the concentration of the refrigerant in (B2) while increasing it in (B1 ).
  • the pressure in the adsorbent bed is lower than that of the condenser and higher than that in the evaporator preventing of the flow of gasses to the condenser or from the evaporator.
  • no cooling effect occurs and the main purpose is to set up the stage to the next step where the heating of adsorbent bed (B1 ) will raise the pressure of the refrigerant from medium level to high level instead from the low pressure level to the high level as it is the case of the cooling water temperature cycle.
  • the lower concentration of (B2) at this stage allows the reduction of its pressure when cooled to lower levels even with high cooling water temperature.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Sorption Type Refrigeration Machines (AREA)

Abstract

La présente invention concerne un procédé et un appareil refroidisseur par adsorption entraîné par faible température qui peuvent fonctionner sur divers modes de cycle, tout en utilisant les mêmes composants, afin d'optimiser les performances du refroidisseur pour diverses conditions ambiantes. Le refroidisseur comprend un ensemble de lits d'adsorption (B1 et B2) interconnectés par l'intermédiaire d'une vanne à bille motorisée (M), un condenseur (C), un évaporateur (E) et une pluralité de conduits de gaz (D) qui permettent aux gaz réfrigérants de s'écouler entre l'évaporateur (E) vers les lits d'adsorption (B1 et B2) et des lits d'adsorption vers le condenseur (C) tout en séparant les lits d'adsorption du condenseur et de l'évaporateur pour l'isolation thermique. Le refroidisseur comprend un dispositif de commande intelligent basé sur des conditions ambiantes qui utilise un ensemble de composants de refroidisseur pour les faire fonctionner dans au moins quatre modes et cycles de base.
PCT/IB2020/059538 2020-10-11 2020-10-11 Refroidisseur par adsorption intelligente à cycles multiples pour températures ambiantes élevées WO2022074440A1 (fr)

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Cited By (1)

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CN116753639A (zh) * 2023-05-29 2023-09-15 中国科学院广州能源研究所 一种含嵌入式磁力真空阀门的吸附式制冷装置

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EP2026020B1 (fr) * 2007-08-09 2010-04-14 Millenium Energy Industries Inc. Unité de refroidissement d'absorption d'air refroidi à faible température en deux phases
JP4467856B2 (ja) * 2001-06-22 2010-05-26 株式会社デンソー 吸着式冷凍機
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JP4467856B2 (ja) * 2001-06-22 2010-05-26 株式会社デンソー 吸着式冷凍機
US20080034785A1 (en) * 2004-05-11 2008-02-14 Cyclect Singapore Pte Ltd. Regenerative Adsorption System
US8578732B2 (en) * 2007-03-13 2013-11-12 Sortech Ag Compact sorption cooling unit
EP2026020B1 (fr) * 2007-08-09 2010-04-14 Millenium Energy Industries Inc. Unité de refroidissement d'absorption d'air refroidi à faible température en deux phases
US20090095012A1 (en) * 2007-10-12 2009-04-16 Atsushi Akisawa Double-effect adsorption refrigeration device

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* Cited by examiner, † Cited by third party
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CN116753639A (zh) * 2023-05-29 2023-09-15 中国科学院广州能源研究所 一种含嵌入式磁力真空阀门的吸附式制冷装置

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