JP2006317042A - Air-conditioning facility utilizing soil heat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an air-conditioning facility utilizing soil heat, capable of effectively cooling and dehumidifying and low in operation cost. <P>SOLUTION: The air-conditioning facility utilizing soil heat and cooling and dehumidifying using different cold sources and heat exchangers, cools with tepid cold water of 20°C or higher obtained by an underground heat exchanger 1 and dehumidifies with low-temperature cold water of about 0°C obtained by melting ice stored in an ice heat storage device 10 operated by nighttime power. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an air conditioning facility that uses geothermal heat and performs cooling and dehumidification using different cooling heat sources and heat exchangers.

  In conventional air conditioning equipment, cooling and dehumidification, which are two important factors in cooling, are performed by a single heat exchanger and a cooling source. That is, the refrigerant is compressed and expanded by a common heat exchanger and vaporized to set the cold heat source below the dew point, and both cooling and dehumidification are performed.

  However, although dehumidification requires that the cooling source be set below the dew point, cooling can be sufficiently performed even above the dew point. Therefore, in the conventional technique in which the cooling source is set to a dew point or lower and cooling and dehumidification are performed, a load more than necessary is applied to the heat exchanger, and the operation cost increases.

  The present invention was devised in view of these problems, and an object of the present invention is to provide an air-conditioning facility that uses geothermal heat that can effectively perform cooling and dehumidification and has low operating costs.

  This will be described with reference to FIGS. The invention according to claim 1 is an air conditioning facility that uses geothermal heat and performs cooling and dehumidification using different heat sources and heat exchangers, and the cooling is performed at least in the geothermal heat exchanger 1. The dehumidification is performed with low-temperature cold water of about 0 ° C. obtained by melting the ice stored in the ice heat storage device 10 operated with nighttime electric power. .

  The ground heat-use air conditioning system according to claim 1 is cooled in at least 20 ° C. or more lukewarm water obtained by the geothermal heat exchanger 1, and dehumidification is stored in the ice heat storage device 10 operated at night power. Therefore, both cooling and dehumidification can be effectively performed, and the operating cost can be greatly reduced.

  That is, since the cooling is performed by the underground heat exchanger 1 by the heat (cold heat) that is abundant in the ground, a heat exchanger that operates with commercial power such as a refrigerator is not necessary, and the operation cost can be reduced. .

  Moreover, since dehumidification is performed with cold / hot / cold water by melting ice stored in the ice heat storage device 10 operated with nighttime electric power, the operating cost can be reduced compared with a refrigerator operated with ordinary daytime electric power. it can.

  FIG. 1 shows an embodiment of a geothermal air conditioning facility according to the present invention. This is an air conditioning facility that uses geothermal heat and performs cooling and dehumidification using different cold heat sources and heat exchangers. And cooling is performed with at least 20 ° C. lukewarm water obtained by the underground heat exchanger 1, and dehumidification is performed at 0 ° C. obtained by melting the ice stored in the ice heat storage device 10 operated at night power. This is done with low-temperature cold water.

  That is, cooling is performed by circulating cold water (cold heat source) through a circulation pipe 2 disposed between the underground heat exchanger 1 buried in the ground and the inside of the building, and the cold water is circulated by the geothermal heat exchanger 1 to generate heat and heat. It replaces and cools to about 20 degreeC, The cold heat is supplied in a building with the fan 3 provided in the ceiling part of the building, and the said building is cooled.

  In addition, dehumidification is performed by operating the ice heat storage device 10 with nighttime electric power to store ice, and the first cold / hot water at about 0 ° C. obtained by melting the ice is cooled by the first pipe 11 to the cold water heat exchanger (cold water coil). Cycle between 13 and 13. And the 2nd low temperature cold water (cold heat source) which circulates through the 2nd pipe 12 distribute | arranged between the cold water heat exchanger 13 and the external air conditioner 17 is heat-exchanged with 1st cold / hot cold water in the cold water heat exchanger 13 After cooling to about 0 ° C. and dehumidifying the outside air sucked into the outside air conditioner 17 by the cold air, it is supplied into the building. This reduces the humidity in the building.

  In addition, in the figure, P1 is a ground heat direct use circulation pump during cooling, P2 is a secondary circulation pump during heating, P3 is a night heat radiation / heating chromatic heat pump during cooling, P4 is a regenerative cold water auxiliary pump for direct cold water, P5 is an outside air cooling / dehumidification pump, P6 is a heat storage hot water pump (daytime during heating), and P7 is an outside air conditioner watering pump. Moreover, the code | symbol S means the time of cooling (summer season) and W means the time of heating (winter season). Moreover, 14 hot water coils, 15 is a compressor, 16 is a four-way valve.

  The ground heat utilization air-conditioning facility according to the present embodiment performs cooling with at least ice cold storage water of 20 ° C. or more obtained by the geothermal heat exchanger 1, and dehumidification is performed on the ice heat storage device 10 that operates with nighttime power. Since it is performed with low-temperature cold water of about 0 ° C. obtained by melting the stored ice, both the cooling and dehumidification can be performed effectively. In addition, the operating cost can be greatly reduced.

  That is, since cooling is performed by underground heat (cold heat) using the underground heat exchanger 1, a refrigerator or the like is not required, and the operation cost can be reduced. Moreover, since dehumidification is performed with cold / hot / cold water by melting the ice stored in the ice heat storage device 10 operated with nighttime electric power, the operation cost can be reduced.

  In addition, since heating is also performed using the underground heat exchanger and the ice heat storage device 10 as shown in FIG. 2, the operating cost can be reduced.

It is a block diagram which shows embodiment of the underground heat utilization air-conditioning equipment which concerns on this invention (cooling and dehumidification). It is a block diagram which shows embodiment of the underground heat utilization air-conditioning equipment which concerns on this invention (heating).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Ground heat exchanger 2 Circulation pipe 3 Fan 10 Ice heat storage apparatus 11 1st pipe 12 2nd pipe 13 Cold water heat exchanger (cold water coil)
14 Hot water coil 15 Compressor 16 Four-way valve 17 Outside air conditioner B Building P1 Circulation pump with direct use of ground heat during cooling P2 Secondary circulation pump during heating P3 Cooling night heat radiation / heating heat pump P4 Thermal storage cold water for direct cold water Auxiliary pump P5 Outside air cooling / dehumidification pump P6 Thermal storage hot water pump (noon during heating)
P7 Outside air conditioner watering pump S Air conditioning (summer)
W Heating (winter)

Claims (1)

An air conditioner that uses geothermal heat and performs cooling and dehumidification using different cooling sources and heat exchangers,
The cooling is performed at least with lukewarm water of 20 ° C. or higher obtained by the underground heat exchanger (1),
A geothermal air-conditioning system characterized in that the dehumidification is performed by low-temperature cold water of about 0 ° C. obtained by melting ice stored in an ice heat storage device (10) operated with nighttime electric power.

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