JP5911675B2 - Air conditioning system operation method, air conditioning system construction method, and air conditioning system - Google Patents

Air conditioning system operation method, air conditioning system construction method, and air conditioning system Download PDF

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JP5911675B2
JP5911675B2 JP2011136394A JP2011136394A JP5911675B2 JP 5911675 B2 JP5911675 B2 JP 5911675B2 JP 2011136394 A JP2011136394 A JP 2011136394A JP 2011136394 A JP2011136394 A JP 2011136394A JP 5911675 B2 JP5911675 B2 JP 5911675B2
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storage tank
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air conditioning
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石井　秀一
秀一 石井
佐藤　健二
健二 佐藤
守屋　充
充 守屋
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Takasago Thermal Engineering Co Ltd
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Description

本発明は、空調システムの運転方法、空調システムの構築方法及び空調システムに関するものである。 The present invention relates to an air conditioning system operating method , an air conditioning system construction method, and an air conditioning system .

従来、図１に示したような、蓄熱槽１とターボ冷凍機２などのセントラル熱源を有する空調システムを採用している建築物３においては、設備更新の際に、図２に示したような、一台の室外機１１に対して複数台の室内機１２を接続したマルチ空調システム（いわゆる、ビルマルチ方式の空調システム）を単純に導入し、蓄熱槽１の利用を放棄する例が増えている。   Conventionally, in a building 3 that employs an air conditioning system having a central heat source such as a heat storage tank 1 and a turbo chiller 2 as shown in FIG. 1, as shown in FIG. More and more examples of abandoning the use of the heat storage tank 1 by simply introducing a multi-air conditioning system (a so-called building multi-type air conditioning system) in which a plurality of indoor units 12 are connected to a single outdoor unit 11. Yes.

しかしながらそのように単純にビルマルチ方式の空調システムを採用すると、折角設置した蓄熱槽１を利用する機会がなくなり、設備が無駄になるばかりでなく、蓄熱調整契約やピーク時間調整契約の恩恵が受けられなくなる。蓄熱調整契約とは、氷蓄熱空調システムなどの運転により昼間時間から夜間時間へ負荷移行できる需要家と電力会社との間で結ばれる電力料金の割引契約であり、またピーク時間調整契約とは、電力需要旺盛期の需要ピーク時に負荷を調整することで割引を受けられる契約である。そこでビルマルチ方式空調システムに設備更新する際に、これまで使用していた蓄熱槽１をそのまま用いてこれを有効に利用することが望まれている。   However, simply adopting a building multi-type air conditioning system in this way eliminates the opportunity to use the heat storage tank 1 installed at a corner, which not only wastes equipment, but also benefits from heat storage adjustment contracts and peak time adjustment contracts. It becomes impossible. A heat storage adjustment contract is a discount contract for a power charge between a power company and a customer who can shift the load from daytime to nighttime by operating an ice heat storage air conditioning system, etc. It is a contract that allows you to receive a discount by adjusting the load at the peak of demand during the power demand period. Therefore, when the facilities are renewed to the building multi-type air conditioning system, it is desired to use the heat storage tank 1 that has been used so far as it is effectively.

他方、ビルマルチ方式空調システムについては、可能な限り省エネ効果を高めた技術として、室外機と室内機との間を循環する冷媒を、冷却塔からの冷却水で冷却する、いわゆる冷媒サブクールシステムが提案されている（特許文献１、２）。   On the other hand, the building multi-type air conditioning system has a so-called refrigerant subcooling system that cools the refrigerant circulating between the outdoor unit and the indoor unit with the cooling water from the cooling tower as a technology that enhances the energy saving effect as much as possible. It has been proposed (Patent Documents 1 and 2).

特開２００６−５２９３４号公報JP 2006-52934 A 特開２００６−２８４０８３号公報JP 2006-284083 A

しかしながら、冷却塔の冷却水の温度は外気湿球温度に依存するため、冷房負荷の高い盛夏の日中には、水温が上昇し、冷媒サブクールシステムの所期の省エネ効果やピークカット効果が得られないおそれがある。そして既述したように、設備更新の際に、従来利用していた蓄熱槽を放棄する点については、たとえこれを非常用の水源や防火水槽に利用するにしても、いわゆる死に水が長期間滞留することになってしまい、藻や昆虫が発生したり、悪臭の原因になったりする。   However, since the temperature of the cooling water in the cooling tower depends on the temperature of the outside air wet bulb, the water temperature rises during the midsummer day when the cooling load is high, and the desired energy saving effect and peak cut effect of the refrigerant subcool system are obtained. There is a risk of not being able to. And as already mentioned, when abandoning a heat storage tank that has been used in the past when renewing equipment, even if it is used as an emergency water source or fire prevention water tank, so-called dead water will remain for a long time. It will stay, causing algae and insects to occur and causing odors.

本発明は、かかる点に鑑みてなされたものであり、蓄熱槽内の水を、中央熱源方式の冷熱源として使用している空調設備を更新してビルマルチ方式空調システムを構築する際にも、既設の蓄熱槽を有効に利用することができ、しかも冷房負荷の高い盛夏においても、外気を利用した省エネ効果の高い空調を実施することを目的としている。   The present invention has been made in view of such points, and also when building a building multi-type air conditioning system by renewing an air-conditioning facility that uses water in a heat storage tank as a cooling source of a central heat source type. The purpose is to carry out air conditioning with high energy-saving effect using outside air even in midsummer where the existing heat storage tank can be used effectively and the cooling load is high.

前記目的を達成するため、本発明は、室外機と室内機の間で冷媒を循環させ、冷凍サイクルを行うことにより建築物内の空調空間を冷房する圧縮膨張方式の空調装置を有する建築物の空調システムにおいて、前記冷媒と前記建築物に設けられた蓄熱槽からの水とを直接熱交換させる冷媒−水熱交換器と、外気を利用して前記蓄熱槽の水を冷却する冷却塔を有し、夜間時には前記蓄熱槽と冷却塔との間で蓄熱槽の水を循環させて蓄熱槽内の水を冷却し、昼間の冷房時には、前記冷媒−水熱交換器により前記蓄熱槽内の水と前記冷媒とを直接熱交換し、前記蓄熱槽の水を夜間に冷却塔に送水するポンプは、昼間において前記蓄熱槽の水を前記冷媒−水熱交換器に送水するポンプと兼用されていることを特徴としている。 In order to achieve the above object, the present invention relates to a building having a compression-expansion type air conditioner that circulates a refrigerant between an outdoor unit and an indoor unit and cools an air-conditioned space in the building by performing a refrigeration cycle. The air conditioning system includes a refrigerant-water heat exchanger that directly exchanges heat between the refrigerant and water from the heat storage tank provided in the building, and a cooling tower that cools the water in the heat storage tank using outside air. In the nighttime, the water in the heat storage tank is circulated between the heat storage tank and the cooling tower to cool the water in the heat storage tank, and in the daytime cooling, the water in the heat storage tank is cooled by the refrigerant- water heat exchanger. The pump that directly exchanges heat with the refrigerant and supplies the water in the heat storage tank to the cooling tower at night is also used as a pump that supplies the water in the heat storage tank to the refrigerant-water heat exchanger in the daytime. It is characterized by that.

本発明によれば、夜間時に前記蓄熱槽と冷却塔との間で蓄熱槽の水を循環させて冷却塔によって蓄熱槽内の水を冷却し、この蓄熱槽内の冷却された水を、昼間時の冷房時に、室外機と室内機の間で循環する冷媒と直接熱交換するようにしたので、冷房負荷の高い盛夏の日中であっても、省エネ効果の高い空調を実施することができる。しかもその際に利用する蓄熱槽は、既存の設備のものをそのまま利用することができ、遊休蓄熱槽を効果的に用いることが可能である。しかも蓄熱槽内の水が、冷媒−水熱交換器や冷却塔との間を循環するので、循環時間が１年中、あるいは２４時間中でなくとも、藻や昆虫の発生を大きく抑えることができ、また異臭の発生も抑制できる。 According to the present invention, the water in the heat storage tank is circulated between the heat storage tank and the cooling tower at night to cool the water in the heat storage tank by the cooling tower, and the cooled water in the heat storage tank is Since the heat exchange with the refrigerant circulated between the outdoor unit and the indoor unit is performed directly at the time of cooling, air conditioning with high energy-saving effect can be implemented even during midsummer days when the cooling load is high. . And the heat storage tank utilized in that case can use the thing of the existing equipment as it is, and can use an idle heat storage tank effectively. Moreover, since the water in the heat storage tank circulates between the refrigerant-water heat exchanger and the cooling tower, the generation of algae and insects can be greatly suppressed even if the circulation time is not one year or 24 hours. And the generation of off-flavors can be suppressed.

また空調システムを構築する方法としては、蓄熱槽内の水を中央熱源方式の冷熱源として使用している空調設備を更新して、室外機と室内機の間で冷媒を循環させて冷凍サイクルを行うことにより建築物内の空調空間を冷房する圧縮膨張方式の空調装置と、前記冷媒と前記建築物に設けられた蓄熱槽からの水とを直接熱交換させる冷媒−水熱交換器と、外気を利用して前記蓄熱槽の水を冷却する冷却塔と、を有し、夜間時には前記蓄熱槽と冷却塔との間で蓄熱槽の水を循環させて蓄熱槽内の水を冷却し、昼間の冷房時には前記冷媒−水熱交換器により前記蓄熱槽内の水と前記冷媒とを直接熱交換する、ビルマルチ方式の空調システムを構築する方法であって、前記空調設備の既設の蓄熱槽を前記空調システムの蓄熱槽として用い、前記建築物に室外機を設置し、前記室外機と室内機との間に前記冷媒の配管を施工し、その際、冷媒の循環路に前記冷媒−水熱交換器を設け、前記冷媒−水熱交換器と前記蓄熱槽との間に、水の循環系配管を施工する際には、既設の蓄熱槽に配管されている既設の往管及び既設の還管を使用する、ことを特徴としている。 As a method of building an air conditioning system, the air conditioning equipment that uses the water in the heat storage tank as a cooling source for the central heat source system is renewed, and the refrigerant is circulated between the outdoor unit and the indoor unit to perform the refrigeration cycle. A compression-expansion type air conditioner that cools the air-conditioned space in the building, a refrigerant-water heat exchanger that directly exchanges heat between the refrigerant and water from the heat storage tank provided in the building, and outside air A cooling tower that cools the water in the heat storage tank using water, and cools the water in the heat storage tank by circulating water in the heat storage tank between the heat storage tank and the cooling tower during the daytime. A method of constructing a building multi-type air conditioning system in which heat is directly exchanged between water in the heat storage tank and the refrigerant by the refrigerant-water heat exchanger during cooling, and an existing heat storage tank of the air conditioning equipment is installed. Used as a heat storage tank of the air conditioning system, the building It established the outdoor unit, and applying a pipe of the refrigerant between the outdoor unit and the indoor unit, whereby, the refrigerant in the circulation path of the refrigerant - water heat exchanger provided, the refrigerant - water heat exchanger When water circulation system piping is constructed between the heat storage tanks, existing outgoing pipes and existing return pipes piped to the existing heat storage tanks are used.

本発明によれば、蓄熱槽内の水を、中央熱源方式の冷熱源として使用している空調設備を更新してビルマルチ方式空調システムを構築する際にも、既存設備の蓄熱槽を有効に利用することができ、しかも冷房負荷の高い盛夏においても、外気を利用した省エネ効果の高い空調を実施することが可能である。   According to the present invention, when a building multi-type air conditioning system is constructed by renewing an air-conditioning facility that uses water in a heat-storage tank as a cooling source of a central heat source method, the heat storage tank of an existing facility is effectively used. Even in midsummer with high cooling load, it is possible to carry out air-conditioning with high energy-saving effect using outside air.

設備更新前の蓄熱槽とセントラル熱源を有する空調システムの系統の概略を示す説明図である。It is explanatory drawing which shows the outline of the system | strain of the air conditioning system which has the thermal storage tank and central heat source before equipment update. 従来の設備更新後のビルマルチ方式の空調システムの系統の概略を示す説明図である。It is explanatory drawing which shows the outline of the system | strain of the conventional building multi-type air conditioning system after equipment update. 本実施の形態に従って構築した空調システムの系統の概略を示す説明図である。It is explanatory drawing which shows the outline of the system | strain of the air conditioning system constructed | assembled according to this Embodiment.

以下、本発明の実施の形態について説明すると、実施の形態が対象とする更新前の空調設備は、前記した図１に示した蓄熱槽とセントラル熱源を有する空調システムを採用している。すなわち、この更新前の空調設備は、地下階に蓄熱槽１を有している。蓄熱槽１は、取水槽１ａと冷却槽１ｂとに分割され、仕切壁１ｃに形成された連通口１ｄによって両槽は、連通している。冷却槽１ｂの水は、ポンプで取水され、ターボ冷凍機２において冷媒と熱交換して降温された後、取水槽１ａの水面近くに送水される。ターボ冷凍機２の冷媒は、屋外に設置された冷却塔４において冷却された冷却水によって冷却される。   Hereinafter, the embodiment of the present invention will be described. The air conditioning equipment before the update targeted by the embodiment adopts the air conditioning system having the heat storage tank and the central heat source shown in FIG. That is, the air conditioning facility before the update has the heat storage tank 1 on the basement floor. The heat storage tank 1 is divided into a water intake tank 1a and a cooling tank 1b, and both tanks communicate with each other through a communication port 1d formed in the partition wall 1c. The water in the cooling tub 1b is taken in by a pump, is cooled by heat exchange with the refrigerant in the turbo chiller 2, and is then sent near the water surface of the water intake tub 1a. The refrigerant of the turbo refrigerator 2 is cooled by the cooling water cooled in the cooling tower 4 installed outdoors.

そして取水槽１ａ内の冷水（たとえば７℃）は、底部近傍に設置された取水口からポンプ５によって取水され、往管Ａを通じて建築物内の各階に設置されている室内機（たとえばファンコイルユニット）１２に送水され、これによって冷房運転を実施するようになっている。室内機１２のコイルにおいて昇温した水は、還管Ｂを通じて蓄熱槽１の冷却槽１ｂへと戻される。   And the cold water (for example, 7 degreeC) in the water intake tank 1a is taken in with the pump 5 from the water intake installed in the bottom vicinity, and the indoor unit (for example, fan coil unit) installed in each floor in the building through the outgoing pipe A ) 12 is sent to the water, and thereby the cooling operation is carried out. The water heated in the coil of the indoor unit 12 is returned to the cooling tank 1b of the heat storage tank 1 through the return pipe B.

またこの既存の空調設備は、暖房運転用にボイラ６を有しており、ボイラによって昇温された温水は、ポンプ７によって各室内機１２へと往管Ａを通じて供給され、暖房に供された後、還管Ｂを経由して再びボイラ６へと戻される。なお建築物３の屋上には、還管Ｂに通ずる膨張タンク８が設置され、配管系の温度変化による水の膨張、収縮を吸収するようになっている。   Moreover, this existing air conditioning equipment has a boiler 6 for heating operation, and the hot water heated by the boiler is supplied to each indoor unit 12 by the pump 7 through the outgoing pipe A and used for heating. Then, it returns to the boiler 6 again via the return pipe B. An expansion tank 8 leading to the return pipe B is installed on the roof of the building 3 so as to absorb the expansion and contraction of water due to the temperature change of the piping system.

このような蓄熱槽１内の水を、中央熱源方式の冷熱源として使用している建築物３の空調設備をビルマルチ方式の空調システムに更新する場合、本実施の形態によれば、蓄熱槽１をそのまま使用することができる。すなわち、まず、通常のビルマルチ方式の空調システムと同様、膨張タンク８が撤去され、たとえば建築物３の屋上に、冷媒の圧縮機を備えた室外機１１が所定の台数設置される。この例では、図３に示したように、各階に置かれている膨張弁を備えた室内機群に対して１台の割合で、屋上に設置されている、 When the air conditioning equipment of the building 3 that uses water in the heat storage tank 1 as a central heat source type cooling source is updated to a building multi-type air conditioning system, according to the present embodiment, the heat storage tank 1 can be used as it is. That is, first, the expansion tank 8 is removed like a normal building multi-type air conditioning system. For example, a predetermined number of outdoor units 11 including refrigerant compressors are installed on the roof of the building 3. In this example, as shown in FIG. 3 , one unit is installed on the rooftop with respect to the indoor unit group provided with the expansion valve placed on each floor.

そして各室外機１１と各階の室内機１２と間で冷媒が循環する配管が施工される。その際、冷媒の循環経路に、冷媒−水熱交換器２１が設けられる。   And piping which a refrigerant | coolant circulates between each outdoor unit 11 and the indoor unit 12 of each floor is constructed. In that case, the refrigerant | coolant-water heat exchanger 21 is provided in the circulation path of a refrigerant | coolant.

他方、既設の蓄熱槽１周りについては、ターボ冷凍機２及び当該ターボ冷凍機２と冷却槽１ｂとの間の配管が撤去される。またボイラ６及び温水系統の配管、ボイラの煙突等も撤去される。   On the other hand, about the existing heat storage tank 1, the piping between the turbo refrigerator 2 and the turbo refrigerator 2 and the cooling tank 1b is removed. In addition, boiler 6 and hot water system piping, boiler chimneys, and the like are also removed.

そして冷媒−水熱交換器２１と蓄熱槽１の取水槽１ａとの間に、水の循環系等の配管が施工される。この場合、既設の蓄熱槽１からの往管Ａ、蓄熱槽１に戻すための還管Ｂの大部分をそのまま使用することができ、また往管Ａを通じて取水槽１ａ内の冷水を供給するポンプ５もそのまま使用することができる。   And piping, such as a water circulation system, is constructed between the refrigerant-water heat exchanger 21 and the intake tank 1a of the heat storage tank 1. In this case, most of the return pipe A from the existing heat storage tank 1 and the return pipe B for returning to the heat storage tank 1 can be used as they are, and the pump supplies the cold water in the water intake tank 1a through the forward pipe A. 5 can also be used as it is.

一方、蓄熱槽１の冷却槽１ｂと冷却塔４との間には、水の循環配管である取水管２３、戻し管２４が施工される。この循環配管によって、ポンプ２２によって取水された水は、取水管２３を通じて冷却塔４に送られ、冷却塔４において降温した水は、戻し管２４を通じて再び冷却槽１ｂの底部付近へと戻される。この場合、冷却塔４は既設のものをそのまま使用してもよいが、より能力の小さい冷却塔に交換してもよい。これによって冷却塔で消費される電力等を軽減させることができる。なお補給水の供給管は、たとえば戻し管２４や蓄熱槽１に適宜接続すればよい。   On the other hand, between the cooling tank 1 b of the heat storage tank 1 and the cooling tower 4, a water intake pipe 23 and a return pipe 24 that are water circulation pipes are installed. By this circulation pipe, the water taken by the pump 22 is sent to the cooling tower 4 through the water intake pipe 23, and the water cooled in the cooling tower 4 is returned again to the vicinity of the bottom of the cooling tank 1b through the return pipe 24. In this case, the existing cooling tower 4 may be used as it is, but it may be replaced with a cooling tower having a smaller capacity. As a result, the power consumed in the cooling tower can be reduced. The supply water supply pipe may be appropriately connected to the return pipe 24 or the heat storage tank 1, for example.

以上の施工により、実施の形態にかかる運転方法を実施するための空調システムが構築される。そしてまず夜間において、蓄熱槽１内の水は、冷却塔４によって冷却されて蓄熱槽１内に貯留される。そして通常の昼間の冷房運転を実施する場合には、室外機１１からの冷媒は、減圧膨張前の段階で、冷媒−水熱交換器２１において、蓄熱槽１の取水槽１ａから取水した、たとえば１０℃〜２０℃の冷水によって過冷却され、室内機１２に供給される。したがって、室内機１２では、その分冷房能力が向上し、またいわゆるピークカット効果が得られる。   With the above construction, an air conditioning system for implementing the operation method according to the embodiment is constructed. First, at night, the water in the heat storage tank 1 is cooled by the cooling tower 4 and stored in the heat storage tank 1. And when carrying out normal daytime cooling operation, the refrigerant from the outdoor unit 11 has taken water from the intake tank 1a of the heat storage tank 1 in the refrigerant-water heat exchanger 21 in the stage before decompression and expansion. It is supercooled with cold water of 10 ° C. to 20 ° C. and supplied to the indoor unit 12. Therefore, in the indoor unit 12, the cooling capacity is improved correspondingly, and a so-called peak cut effect is obtained.

発明者らの試算によれば、東京における８月１５時における冷却塔によって得られる冷却水の温度は平均２９℃であるが、そのように夜間において冷却塔４によって外気を利用して冷却することで、２〜３℃低下させることができる。その結果、冷媒−水熱交換器２１による冷媒の事前過冷却によるピークカット効果は、東京の８月の平均気象条件では、２１％から２７％程度へと向上する。   According to the estimation by the inventors, the temperature of the cooling water obtained by the cooling tower at 15:00 on August 15 in Tokyo is an average of 29 ° C., but the cooling tower 4 is used for cooling at night using the outside air. Thus, the temperature can be lowered by 2 to 3 ° C. As a result, the peak cut effect due to the prior supercooling of the refrigerant by the refrigerant-water heat exchanger 21 is improved from 21% to about 27% under the average weather conditions in August in Tokyo.

また冷房能力も１２％から１９％程度に向上するので、室外機１１の容量を、図２の従来の一般的なビルマルチ方式の空調システムよりも小さくすることができ、それに伴って室外機設置スペースや設備費を低減することができる。   Moreover, since the cooling capacity is improved from 12% to about 19%, the capacity of the outdoor unit 11 can be made smaller than that of the conventional general building multi-type air conditioning system of FIG. 2, and the outdoor unit is installed accordingly. Space and equipment costs can be reduced.

そして蓄熱槽１内の水は、夜間において冷却塔４との間で循環し、また昼間においても冷媒−水熱交換器２１との間で循環するので、いわゆる死に水となることはなく、藻や昆虫の発生、異臭の発生を抑えることができ、水質管理の手間も省くことが可能である。もちろん蓄熱槽１内の水は、断水時の非常用水源や防火用水源として使用することができる。   And since the water in the heat storage tank 1 circulates between the cooling tower 4 at night and also circulates between the refrigerant and the water-heat exchanger 21 even in the daytime, it does not become so-called dead water. And the generation of insects and off-flavors can be suppressed, and the management of water quality can be saved. Of course, the water in the heat storage tank 1 can be used as an emergency water source or a fire-proof water source at the time of water outage.

そしてそのように空調システムを構築するにあたっては、既設の蓄熱槽１をそのまま使用することができ、また往管Ａ、還管Ｂの大部分もそのまま利用することができるから、施工のコストも抑えることができる。   And in constructing such an air conditioning system, the existing heat storage tank 1 can be used as it is, and most of the outgoing pipe A and return pipe B can be used as they are, so that the construction cost is also suppressed. be able to.

なお夜間において冷却塔４に送水するためのフリーリング用のポンプ２２は、昼間において冷媒−水熱交換器２１に送水するポンプ５と兼用としてもよい。これによってさらに設備費の低減を図ることができる。また冷却塔４に変えて、空冷式のチラーを設置してもよい。   The freering pump 22 for supplying water to the cooling tower 4 at night may also be used as the pump 5 for supplying water to the refrigerant-water heat exchanger 21 in the daytime. This can further reduce the equipment cost. Instead of the cooling tower 4, an air-cooled chiller may be installed.

また既設の蓄熱槽１の容量が大きい場合には、その分蓄熱容量が大きいので、たとえば盛夏に入る前の段階から、冷却塔４を作動させて、水温を下げておくいわゆる季間蓄熱することが可能である。   In addition, when the capacity of the existing heat storage tank 1 is large, the heat storage capacity is large, and so-called seasonal heat storage is performed by, for example, operating the cooling tower 4 and lowering the water temperature from the stage before entering the midsummer. Is possible.

本発明は、熱槽内の水を、中央熱源方式の冷熱源として使用している空調設備を更新してビルマルチ方式空調システムを構築する際に有用である。   INDUSTRIAL APPLICABILITY The present invention is useful when building a building multi-type air conditioning system by renewing an air conditioning facility that uses water in a heat tank as a central heat source type cold heat source.

１ 蓄熱槽
１ａ 取水槽
１ｂ 冷却槽
１ｃ 仕切り壁
１ｄ 連通口
２ ターボ冷凍機
３ 建築物
４ 冷却塔
５、７、２２ ポンプ
６ ボイラ
８ 膨張タンク
１１ 室外機
１２ 室内機
２１ 冷媒−水熱交換器
２３ 取水管
２４ 戻し管
Ａ 往管
Ｂ 還管 DESCRIPTION OF SYMBOLS 1 Heat storage tank 1a Water intake tank 1b Cooling tank 1c Partition wall 1d Communication port 2 Turbo refrigerator 3 Building 4 Cooling tower 5, 7, 22 Pump 6 Boiler 8 Expansion tank 11 Outdoor unit 12 Indoor unit 21 Refrigerant-water heat exchanger 23 Intake pipe 24 Return pipe A Out pipe B Return pipe

Claims (4)

室外機と室内機の間で冷媒を循環させ、冷凍サイクルを行うことにより建築物内の空調空間を冷房する圧縮膨張方式の空調装置を有する建築物の空調システムにおいて、
前記冷媒と前記建築物に設けられた蓄熱槽からの水とを直接熱交換させる冷媒−水熱交換器と、
外気を利用して前記蓄熱槽の水を冷却する冷却塔を有し、
夜間時には前記蓄熱槽と冷却塔との間で蓄熱槽の水を循環させて蓄熱槽内の水を冷却し、
昼間の冷房時には、前記冷媒−水熱交換器により前記蓄熱槽内の水と前記冷媒とを直接熱交換し、
前記蓄熱槽の水を夜間に冷却塔に送水するポンプは、昼間において前記蓄熱槽の水を前記冷媒−水熱交換器に送水するポンプと兼用されている、
ことを特徴とする、空調システムの運転方法。 In a building air conditioning system having a compression / expansion type air conditioner that cools an air-conditioned space in a building by circulating a refrigerant between the outdoor unit and the indoor unit and performing a refrigeration cycle,
A refrigerant-water heat exchanger that directly exchanges heat between the refrigerant and water from a heat storage tank provided in the building;
A cooling tower that cools the water in the heat storage tank using outside air;
During the night, the water in the heat storage tank is circulated between the heat storage tank and the cooling tower to cool the water in the heat storage tank,
During daytime cooling, the refrigerant-water heat exchanger directly exchanges heat between the water in the heat storage tank and the refrigerant,
The pump that supplies the water in the heat storage tank to the cooling tower at night is also used as a pump that supplies the water in the heat storage tank to the refrigerant-water heat exchanger in the daytime.
A method for operating an air conditioning system. 蓄熱槽内の水を中央熱源方式の冷熱源として使用している空調設備を更新して、室外機と室内機の間で冷媒を循環させて冷凍サイクルを行うことにより建築物内の空調空間を冷房する圧縮膨張方式の空調装置と、前記冷媒と前記建築物に設けられた蓄熱槽からの水とを直接熱交換させる冷媒−水熱交換器と、外気を利用して前記蓄熱槽の水を冷却する冷却塔と、を有し、夜間時には前記蓄熱槽と冷却塔との間で蓄熱槽の水を循環させて蓄熱槽内の水を冷却し、昼間の冷房時には前記冷媒−水熱交換器により前記蓄熱槽内の水と前記冷媒とを直接熱交換する、ビルマルチ方式の空調システムを構築する方法であって、
前記空調設備の既設の蓄熱槽を前記空調システムの蓄熱槽として用い、
前記建築物に室外機を設置し、
前記室外機と室内機との間に前記冷媒の配管を施工し、その際、冷媒の循環路に前記冷媒−水熱交換器を設け、
前記冷媒−水熱交換器と前記蓄熱槽との間に、水の循環系配管を施工する際には、既設の蓄熱槽に配管されている既設の往管及び既設の還管を使用する、
ことを特徴とする、空調システムの構築方法。 Renewing the air conditioning equipment that uses water in the heat storage tank as a cooling source for the central heat source system, and circulating the refrigerant between the outdoor unit and the indoor unit to perform the refrigeration cycle, the air conditioning space in the building The air conditioner of the compression / expansion method for cooling, the refrigerant-water heat exchanger that directly exchanges heat between the refrigerant and the water from the heat storage tank provided in the building, and the water in the heat storage tank using outside air. A cooling tower that cools, and cools the water in the heat storage tank by circulating water in the heat storage tank between the heat storage tank and the cooling tower at night, and the refrigerant-water heat exchanger during the daytime cooling. A method of constructing a building multi-type air conditioning system that directly exchanges heat between the water in the heat storage tank and the refrigerant,
Using an existing heat storage tank of the air conditioning equipment as a heat storage tank of the air conditioning system,
An outdoor unit is installed in the building,
The refrigerant pipe is constructed between the outdoor unit and the indoor unit, and at that time, the refrigerant- water heat exchanger is provided in the refrigerant circulation path,
When constructing a water circulation system pipe between the refrigerant-water heat exchanger and the heat storage tank, use an existing forward pipe and an existing return pipe piped to an existing heat storage tank,
The construction method of the air-conditioning system characterized by the above-mentioned. 前記冷却塔と前記蓄熱槽との間に、水の循環系配管を施工し、補給水の供給管は、当該循環系配管における戻し管、または前記蓄熱槽に接続することを特徴とする、請求項２に記載の空調システムの構築方法。 A water circulation pipe is constructed between the cooling tower and the heat storage tank, and a supply pipe for makeup water is connected to a return pipe in the circulation pipe or the heat storage tank. Item 3. An air conditioning system construction method according to Item 2. 室外機と室内機の間で冷媒を循環させ、冷凍サイクルを行うことにより建築物内の空調空間を冷房する圧縮膨張方式の空調装置を有する建築物の空調システムであって、
前記冷媒と前記建築物に設けられた蓄熱槽からの水とを直接熱交換させる冷媒−水熱交換器と、
外気を利用して前記蓄熱槽の水を冷却する冷却塔を有し、
夜間時には前記蓄熱槽と冷却塔との間で蓄熱槽の水を循環させて蓄熱槽内の水を冷却し、昼間の冷房時には、前記冷媒−水熱交換器により前記蓄熱槽内の水と前記冷媒とを直接熱交換するように構成され、
前記蓄熱槽の水を夜間に冷却塔に送水するポンプは、昼間において前記蓄熱槽の水を前記冷媒−水熱交換器に送水するポンプと兼用されている、ことを特徴とする、空調システム。 A building air conditioning system having a compression / expansion type air conditioner that circulates a refrigerant between an outdoor unit and an indoor unit and cools an air-conditioned space in the building by performing a refrigeration cycle,
A refrigerant-water heat exchanger that directly exchanges heat between the refrigerant and water from a heat storage tank provided in the building;
A cooling tower that cools the water in the heat storage tank using outside air;
During the night, the water in the heat storage tank is circulated between the heat storage tank and the cooling tower to cool the water in the heat storage tank, and during the daytime cooling, the refrigerant-water heat exchanger and the water in the heat storage tank are It is configured to exchange heat directly with the refrigerant,
The air conditioning system characterized in that the pump for feeding the water in the heat storage tank to the cooling tower at night is also used as the pump for feeding the water in the heat storage tank to the refrigerant-water heat exchanger in the daytime.
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