JP2008014563A - Cold storage type air conditioning system - Google Patents

Cold storage type air conditioning system Download PDF

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Publication number
JP2008014563A
JP2008014563A JP2006185479A JP2006185479A JP2008014563A JP 2008014563 A JP2008014563 A JP 2008014563A JP 2006185479 A JP2006185479 A JP 2006185479A JP 2006185479 A JP2006185479 A JP 2006185479A JP 2008014563 A JP2008014563 A JP 2008014563A
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JP
Japan
Prior art keywords
heat
cooling
cold storage
air conditioning
condenser
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Pending
Application number
JP2006185479A
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Japanese (ja)
Inventor
Yuzuru Higo
Taisuke Kaneko
Eiji Yamauchi
英二 山内
譲 肥後
泰輔 金子
Original Assignee
Hitachi Building Systems Co Ltd
株式会社日立ビルシステム
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Publication date
Application filed by Hitachi Building Systems Co Ltd, 株式会社日立ビルシステム filed Critical Hitachi Building Systems Co Ltd
Priority to JP2006185479A priority Critical patent/JP2008014563A/en
Publication of JP2008014563A publication Critical patent/JP2008014563A/en
Pending legal-status Critical Current

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    • Y02E60/142
    • Y02E60/147

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cold storage air conditioning system capable of reducing electric power consumption during cold storage. <P>SOLUTION: The cold storage type air conditioning system is provided with a condenser 12, and a cooling tower 2 using the atmosphere to cool cooling water circulated in a heat transfer pipe 12A of the condenser 12. It is provided with a cold storage tank 31 connected to a cooling water circulation system between the cooling tower 2 and the condenser 12, and pumps 32, 33 for a heat storage medium. The cooling tower 2 and the pump 32 are operated during the night to store cold in the cold storage tank. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a regenerative heat type air conditioning system.

There is a heat storage application system in air conditioning as a measure for improving the load factor of daily power. By using inexpensive nighttime electricity, a heat storage tank is provided in a part of the chilled water system, operating the heat source unit of the air conditioning system to store and cool, and dissipate heat at the peak of the unit price of electricity, thereby reducing the total operating cost. These methods operate a main heat source machine at night, for example, an electric motor driven turbo refrigerator (see Patent Document 1).
Japanese Patent Laid-Open No. 11-316038

  Since the conventional cold storage heat method operates a heat source device, there is a drawback that the power consumption during the cold storage heat is large and the operation temperature is low because the evaporation temperature of the refrigerant is low.

  An object of the present invention is to provide a regenerative heat type air conditioning system that can reduce power consumption during regenerative heat.

  In order to achieve the above object, the present invention provides a regenerative thermal air conditioning system including a condenser and a cooling tower that cools cooling water circulated to the condenser using the atmosphere, and is provided between the cooling tower and the condenser. An animal cooling / heating tank and a heat storage medium pump connected to the cooling water circulation system are provided, and the cooling tower and the heat storage medium pump are operated at night to store heat in the animal cooling / heating tank.

  As described above, according to the present invention, since the cooling tower and the heat storage medium pump need only be operated, the power consumption during the cold storage heat can be reduced as compared with the case where the heat source unit is operated to perform the cold storage heat.

  Hereinafter, an embodiment in which the present invention is applied to an air conditioning system using an electric motor driven turbo refrigerator will be described with reference to FIG.

  The air conditioning system according to this embodiment includes a turbo refrigerator 1, a cooling tower 2, a cold storage heat apparatus 3, and a cooling fan coil unit 4 installed in a room.

  The turbo refrigerator 1 is an electric motor-driven turbo compressor 11 that compresses and boosts refrigerant vapor, and a condenser that liquefies the refrigerant vapor compressed by the turbo compressor 11 with cooling water flowing in the heat transfer pipe 12A. 12, the refrigerant liquid liquefied in the condenser 12 is introduced after being decompressed, and is composed of an evaporator 13, a cooling water pump 14, and a cooling water pump 15 for cooling and cooling cooling water flowing in the heat transfer tube 13A. . The cooling tower 2 includes a fan 21 and a spray 22. The regenerative heat storage device 3 includes a regenerative heat storage tank 31, a heat storage medium circulation pump 32, a heat radiation pump 33, temperature sensors 34 and 35, and an electromagnetic on-off valve 36 in which a latent heat storage material that changes phase (liquid-solid) at about 29 ° C. , 37, and is connected to a cooling water circulation system that connects the cooling tower 2 and the heat transfer pipe 12A of the condenser 12. The fan coil unit 4 is installed in each room to be cooled.

  Next, the cooling water circulation path during normal cooling operation and cold storage heat operation will be described.

During normal cooling operation:
The electromagnetic open / close valve 37 is “open”, the electromagnetic open / close valve 36 is “closed”, and the pumps 32 and 33 are stopped.

  Thereby, the cooling water cooled by the atmosphere in the cooling tower 2 is sent into the heat transfer pipe 12A of the condenser 12 by the cooling water pump 14, and after cooling the refrigerant vapor outside the pipe, the cooling water returns to the cooling tower 2 and the spray 22 Scattered from.

At this time, if the heat radiation pump 33 is operated and the animal cooling heat stored in the animal cooling / heating tank 31 is sent to the cooling tower 2, the cooling water temperature can be lowered, and higher cooling capacity can be exhibited.

  The operation of the heat radiation pump 33 may be performed when the temperature in the water tank of the cooling tower 2 (detected by the temperature sensor 35) rises above the standard specification set temperature of cooling water (generally 32 ° C.). The completion of the heat radiation operation (operation of the heat radiation pump 33) is determined by the temperature difference between the temperature sensor 35 and the temperature sensor 34 (T35-T34), and when the temperature difference (T35-T34) becomes 3 ° C. or less. To do. Furthermore, although the indication of the start of heat radiation varies depending on the cold storage heat capacity of the cold storage heat storage tank 31 and the air conditioning load, it is a time zone in which the demand signal and the power unit price are expensive (for example, 13: 00 to 16: 00 in the case of July to September). ), Etc. should be determined in consideration of the installation environment.

During cold storage operation:
The electromagnetic on-off valve 37 is “closed”, the electromagnetic on-off valve 36 is “open”, the pump 33 is stopped, and the fan 22 and the pump 32 of the cooling tower 2 are operated.

  Thereby, the cooling water cooled by the cooling tower 2 is circulated between the cooling tower 2 and the cold storage heat tank 31, and the latent heat storage material in the cold storage heat tank 31 is solidified to perform cold storage heat.

  Further, when the temperature in the water tank of the cooling tower 2 (detected by the temperature sensor 35) is sufficiently lower than the solidification temperature of the latent heat storage material (29 ° C. in this example), the heat storage medium circulation pump 32 is stopped, and this heat storage medium circulation pump Cold storage heat is generated by operating a heat dissipating pump 33 having a smaller motor capacity than 32.

  Further, the completion of the cold storage heat is determined by the temperature difference (T35-T34) between the inlet temperature of the cold storage heat tank 31 (detected by the temperature sensor 35) and the outlet temperature of the cold storage heat tank 31 (detected by the temperature sensor 34). When (T35-T34) <3 ° C., the heat radiation pump 33 is stopped upon completion of the cold storage heat.

  In addition to the above, the following aspects can also be implemented.

(1) When performing cold storage heat operation, the temperature of the cooling water in the cooling tower water tank is detected, and if it is 26 ° C. or less, cold heat is stored by operating only the heat dissipation pump. Thus, water cooling by the cooling tower and cold storage heat can be performed simultaneously.

(2) Instead of the electric motor driven turbo chiller in the embodiment, an absorption chiller / heater can be used, and the same effect as in the embodiment can be expected.

It is an air-conditioning system flow figure of one embodiment of the present invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Turbo type refrigerator 2 Cooling tower 3 Cooling heat storage device 12 Condenser 14 Cooling water pump 21 Fan 22 Spray 31 Cooling heat storage tank 32 Heat storage medium circulation pump 33 Radiation pump 34, 35 Temperature sensor 36, 37 Electromagnetic switching valve

Claims (2)

  1.   In a regenerative thermal air conditioning system comprising a condenser and a cooling tower for cooling the cooling water circulated to the condenser using the atmosphere, a livestock cooling / heating tank connected to a cooling water circulation system between the cooling tower and the condenser And a heat storage medium pump, wherein the cooling tower and the heat storage medium pump are operated at night to store heat in the livestock cooling heat tank.
  2.   The regenerative heat storage air conditioning system according to claim 1, wherein a latent heat storage material that changes phase from a liquid to a solid at the time of cold storage heat is provided in the livestock cooling heat tank.
JP2006185479A 2006-07-05 2006-07-05 Cold storage type air conditioning system Pending JP2008014563A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006185479A JP2008014563A (en) 2006-07-05 2006-07-05 Cold storage type air conditioning system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006185479A JP2008014563A (en) 2006-07-05 2006-07-05 Cold storage type air conditioning system

Publications (1)

Publication Number Publication Date
JP2008014563A true JP2008014563A (en) 2008-01-24

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Family Applications (1)

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JP2006185479A Pending JP2008014563A (en) 2006-07-05 2006-07-05 Cold storage type air conditioning system

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008151888A1 (en) * 2007-06-14 2008-12-18 International Business Machines Corporation Cooling system and method utilizing thermal capacitor unit
US8783052B2 (en) 2010-11-04 2014-07-22 International Business Machines Corporation Coolant-buffered, vapor-compression refrigeration with thermal storage and compressor cycling
US8789385B2 (en) 2010-11-04 2014-07-29 International Business Machines Corporation Thermoelectric-enhanced, vapor-compression refrigeration method facilitating cooling of an electronic component
CN104006468A (en) * 2014-05-06 2014-08-27 西安工程大学 Cool storage air conditioning device based on combination of evaporative cooling and water curtain outer wall
US8833096B2 (en) 2010-11-04 2014-09-16 International Business Machines Corporation Heat exchange assembly with integrated heater
CN104061643A (en) * 2014-06-23 2014-09-24 西安工程大学 Air conditioning system combined by closed heat source heat pump and evaporative cooling
US8899052B2 (en) 2010-11-04 2014-12-02 International Business Machines Corporation Thermoelectric-enhanced, refrigeration cooling of an electronic component
US8955346B2 (en) 2010-11-04 2015-02-17 International Business Machines Corporation Coolant-buffered, vapor-compression refrigeration apparatus and method with controlled coolant heat load
US9207002B2 (en) 2011-10-12 2015-12-08 International Business Machines Corporation Contaminant separator for a vapor-compression refrigeration apparatus
US9301433B2 (en) 2010-11-04 2016-03-29 International Business Machines Corporation Vapor-compression refrigeration apparatus with backup air-cooled heat sink and auxiliary refrigerant heater

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010529413A (en) * 2007-06-14 2010-08-26 インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation Cooling system and method using thermal capacitor unit
US7788941B2 (en) 2007-06-14 2010-09-07 International Business Machines Corporation Cooling system and method utilizing thermal capacitor unit(s) for enhanced thermal energy transfer efficiency
WO2008151888A1 (en) * 2007-06-14 2008-12-18 International Business Machines Corporation Cooling system and method utilizing thermal capacitor unit
US8955346B2 (en) 2010-11-04 2015-02-17 International Business Machines Corporation Coolant-buffered, vapor-compression refrigeration apparatus and method with controlled coolant heat load
US8783052B2 (en) 2010-11-04 2014-07-22 International Business Machines Corporation Coolant-buffered, vapor-compression refrigeration with thermal storage and compressor cycling
US8789385B2 (en) 2010-11-04 2014-07-29 International Business Machines Corporation Thermoelectric-enhanced, vapor-compression refrigeration method facilitating cooling of an electronic component
US8813515B2 (en) 2010-11-04 2014-08-26 International Business Machines Corporation Thermoelectric-enhanced, vapor-compression refrigeration apparatus facilitating cooling of an electronic component
US9301433B2 (en) 2010-11-04 2016-03-29 International Business Machines Corporation Vapor-compression refrigeration apparatus with backup air-cooled heat sink and auxiliary refrigerant heater
US8833096B2 (en) 2010-11-04 2014-09-16 International Business Machines Corporation Heat exchange assembly with integrated heater
US8899052B2 (en) 2010-11-04 2014-12-02 International Business Machines Corporation Thermoelectric-enhanced, refrigeration cooling of an electronic component
US9470439B2 (en) 2011-10-12 2016-10-18 International Business Machines Corporation Contaminant separator for a vapor-compression refrigeration apparatus
US9207002B2 (en) 2011-10-12 2015-12-08 International Business Machines Corporation Contaminant separator for a vapor-compression refrigeration apparatus
CN104006468A (en) * 2014-05-06 2014-08-27 西安工程大学 Cool storage air conditioning device based on combination of evaporative cooling and water curtain outer wall
CN104006468B (en) * 2014-05-06 2016-09-28 西安工程大学 The cold storage air conditioning apparatus combined with water curtain outer wall based on evaporation cooling
CN104061643A (en) * 2014-06-23 2014-09-24 西安工程大学 Air conditioning system combined by closed heat source heat pump and evaporative cooling
CN104061643B (en) * 2014-06-23 2017-01-04 西安工程大学 Closed type heat source tower heat pump cools down united air conditioning system with evaporation

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