RU2533355C2 - Regenerative system for regulation of inlet air parameters - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: offered invention relates to civil engineering and can be used for pre-heating and cooling of inlet air in HVAC systems. The system for regulation of inlet air parameters comprises a heat exchanger which is located below the ground freezing level and formed by heat exchange pipes, mounted aslope towards air flow and joined from one side with a distribution air duct, that is a rectangular box with a pyramidal cover, the hole of which at the grade level is connected to the intake cap, the side walls of which are perforated, and from the other side the of the edges heat exchange pipes are connected with the intake air duct, that is a rectangular box with a pyramidal cover and a bottom, the hole of which at the grade level is connected through the upper edge of T-joint with a moisture removing cap, along the vertical axis of intake air duct below the condensate level in the pyramidal bottom the vertical pipe is mounted which is filled with a wick, joined with a wick of the moisture removing cap, is installed, and the side branch pipe of the T-joint is connected through an inlet air duct with the valve, air heater, ventilator, conditioner and trunk air duct located in the ventilation chamber of the building.

EFFECT: improvement of efficiency of inlet air parameters regulation system.

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Description

The present invention relates to construction and can be used for preheating and cooling the supply air in ventilation and air conditioning systems in the winter and summer periods, respectively.

A known air conditioning system comprising a fan, an air cooler, an air heater (air heater), an irrigation chamber combined with a mixing chamber (central air conditioning) [RF Patent No. 22533804, IPC F24F 5/00, F24F 3/14, 2005].

A disadvantage of the known system is the high energy consumption for heating and cooling air, which reduces its efficiency.

Closer to the proposed invention is an energy-saving air-conditioning system containing a supply (ventilation chamber), in which a valve, fan, air heater, irrigation chamber (central air conditioning) are placed, in front of which there is a droplet eliminator and a heat exchanger connected to an energy source from the secondary energy resources system ( VER) [RF Patent No. 2302588 IPC F24F 5/00, 2007].

The disadvantages of the known air conditioning system are the need for a nearby VER source and supply heat pipes and the inability to use the existing VER in the summer to cool the supply air, which reduces its effectiveness.

The technical result of the invention is to increase the efficiency of the supply air control system.

The technical result is achieved by a regenerative system for controlling the supply air parameters, including a heat exchanger placed below the freezing level, consisting of heat exchangers placed at a certain distance from each other in the soil, with a slope in the direction of air movement and connected by their edges on one side through distribution holes an air box, which is a rectangular vertical box with a pyramidal lid, the opening of which is connected to the ground surface nano with a intake cap, the side walls of which are perforated with vertical slots, and on the other hand the edges of the heat exchanger tubes are connected through openings with a receiving air box, which is a rectangular vertical box with a pyramidal cover and a pyramidal bottom, the opening of which at the level of the earth’s surface is connected through the upper edge of the tee with a dehumidifying cap, the side walls of which are perforated with vertical slots, is installed vertically on the vertical axis of the receiving air box a pipe filled with a wick, the lower edge of which is below the condensate level in the pyramidal bottom, and the upper edge is connected through an opening to the bottom of the dehumidification cap, on the surface of which a layer of wick connected to the wick is laid, the side edge of the tee connected through the inlet duct to the valve, air heater, fan, central air conditioning and main duct located in the ventilation chamber of the building.

The proposed regenerative system for regulating the supply air parameters (PCRS) is presented in Figs. 1-4 (in Fig. 1 is a general view, in Figs. 2-4 are sections and a PCRS unit).

RSRPV contains located below the freezing level of soil 1 heat exchanger 2, consisting of heat exchange tubes 3, placed at some distance from each other in the soil 1, with a slope in the direction of air movement and connected by their edges on one side through the holes (Fig.1-4 not shown) with an air distribution box 4, which is a rectangular vertical box 5 with a pyramidal cover 6, the opening of which at the ground surface (not shown in Figs. 1-4) is connected to the intake cap 7, the side walls of which are perforated with slots 8, and on the other side the edges of the heat exchange tubes 3 are connected through holes (not shown in Figs. 1-4) with a receiving air box 9, which is a rectangular vertical box 10 with a pyramidal cover 11 and a pyramidal pallet 12, the opening of which is at the level the surface of the earth (not shown in FIGS. 1-4) is connected through the upper edge of the tee 13 with a dehumidification cap 14, the side walls of which are perforated with vertical slots 8, a vert is installed along the central vertical axis of the receiving air box 9 an ical tube 15 filled with a wick 16, the lower edge of which is below the level of condensate in the pyramidal bottom 12, and the upper edge is connected through an opening (not shown in Figs. 1-4) to the bottom of the dehumidification cap 14, on the surface of which a layer of wick 17 is laid, connected to the wick 16, and the lateral edge of the tee 13 is connected through an inlet duct 18 to a valve 19, an air heater 20, a fan 21, a central air conditioner 22 and a main duct 23 located in the ventilation chamber 24 of the building 25.

The proposed RSRPV is based on the following: features of the temperature profile along the soil depth (in winter, in most of the territory of Russia, the soil temperature is below freezing above zero).

The proposed RSRPV operates in two modes: summer and winter. In the summer period, outside air with a temperature of t _L1 enters through the slots 8 into the intake hood 7, in which a certain vacuum is created due to the operation of the fan 21, from where it enters the distribution air box 4 of the heat exchanger 2, from which it is distributed through its pipes 3 and moves through them into the receiving air box 9. During the movement of air through the pipes 3 between it and the soil 1 having a lower temperature t _ГЛ , heat exchange occurs through the walls of the pipes 3, as a result of which the air temperature decreases to t _Л2 , and the resulting water condensate drains due to the slope of the pipes 3 into the pan 12. The cooled and drained air is collected in the intake air duct 9 and through the tee 13, the inlet duct 18 and the valve 19 enters the ventilation chamber 24, where the fan 21 feeds it to the central air conditioner 22 bypassing the air heater 20 (air bypass is not shown in FIGS. 1-4). In the central air conditioner 22, the air is adjusted to the required parameters, after which the conditioned air enters the main duct 23, which is directed to consumers (not shown in Figs. 1-4). The removal of water condensate from the pan 12 is carried out due to capillary forces by the wick 16, from where the condensate enters the wick 17 located on the bottom of the dehumidification cap 14, from the surface of which moisture evaporates due to the heat of the outside air entering the slots 8 and blowing moisture vapor through these the same gap 8 into the atmosphere.

In the winter period of the RSRPV operation, outside air with a low temperature t _З1 enters through the slots 8 into the intake hood 7, in which a certain pressure is created due to the operation of the fan 21, from where it enters the distribution air box of the heat exchanger 2, located in its working part below the freezing depth, from which it is distributed to the tubes 3 and moves them to a receiving air duct 9. in the process of air flow through the tubes 3 between it and the ground 1, having a higher temperature t _P2, through the walls of the pipes 3 takes place m ploobmen, whereby the temperature increases to t _P2. Next, air is collected in the intake air duct 9 and through the tee 13, the inlet duct 18 and the valve 19 enters the ventilation chamber 24, where the fan 21 feeds it into the air heater 20, and then into the air conditioner 22, in which the air is adjusted to the required parameters, after which air enters the main duct 23, through which it is directed to consumers (not shown in Figs. 1-4). In the winter period of the RSRPV operation, when the outside air is heated in the pipes 3, water condensate does not form and does not accumulate in the pan 12 of the intake air box 9. Therefore, in the winter period of the RSRPV operation, the vertical slots 8 of the dehumidification hood 14 are closed to prevent low temperature outside air from contacting the surface wick 17 located at the bottom of the dehumidification cap 9.

Thus, the design of the proposed regenerative system for regulating the supply air parameters allows the use of low-grade heat (regenerative energy) of the soil below the freezing level for preheating the supply air in the winter period and cooling it in the summer, which significantly increases its efficiency.

Claims (1)

A regenerative control system for the supply air parameters, comprising a ventilation chamber in which a valve, fan, air heater, central air conditioner are located, in front of which a droplet eliminator and a heat exchanger are arranged, characterized in that the heat exchanger is placed below the freezing level of the soil and consists of heat exchange tubes placed at a certain distance from each other in the ground, with a slope in the direction of air movement and connected by their edges on one side through openings with an air distribution box, representing a rectangular vertical box with a pyramidal lid, the opening of which at ground level is connected to the intake cap, the side walls of which are perforated with vertical slots, and on the other side the edges of the heat exchanger tubes are connected through openings with a receiving air box, which is a rectangular vertical box with a pyramidal lid and a pyramidal bottom, the opening of which at the level of the earth’s surface is connected through the upper edge of the tee with a dehumidification cap, the side walls of which are perforated with vertical slots (open in the summer and closed in the winter), a vertical pipe is installed along the vertical axis of the intake air duct, filled with a wick, the lower edge of which is below the condensate level in the pyramidal bottom, and the upper edge is connected through the hole to the bottom a moisture-removing cap, on the surface of which a layer of a wick is laid, connected to a wick filling the pipe, the side edge of the tee connected through the inlet duct to the valve om, heater, fan, central air conditioning and the main duct located in the plenum of the building.

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