JP2012037101A - Cool biz air conditioning system using dynamic ice thermal storage - Google Patents

Cool biz air conditioning system using dynamic ice thermal storage Download PDF

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JP2012037101A
JP2012037101A JP2010175915A JP2010175915A JP2012037101A JP 2012037101 A JP2012037101 A JP 2012037101A JP 2010175915 A JP2010175915 A JP 2010175915A JP 2010175915 A JP2010175915 A JP 2010175915A JP 2012037101 A JP2012037101 A JP 2012037101A
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JP5786196B2 (en
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Masahide Fukui
雅英 福井
Yoshihiro Saito
佳洋 斉藤
Hiroshi Honma
博司 本間
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Shinryo Corp
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Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system improving unpleasantness (heat and humidity) when so-called Cool Biz (energy-saving in Japan) is performed during cooling operation in summertime.SOLUTION: This Cool Biz air conditioning system using dynamic ice thermal storage includes: a dynamic ice thermal storage tank; a cold source apparatus such as a heat pump chiller; an outdoor air conditioning unit including a fan and a cooling/dehumidifying coil; a cooling coil unit with a fan; and various kinds of piping equipment and control apparatuses. The cooling coil unit with the fan is arranged adjacently to a room to be air-conditioned, and is arranged to feed cold air to the room to be air-conditioned and to receive return air from the room to be air-conditioned. The outdoor air conditioning unit is supplied with low-temperature cold water from the dynamic ice thermal storage tank to cool and dehumidify the outside air to about 9 degrees, and the low-temperature and low-humidity air is fed to the cooling coil unit with the fan. The cooling coil unit with the fan is supplied with a low-temperature refrigerant from the cold source apparatus, and at the same time, supplied with the low-temperature and low-humidity air from the outdoor air conditioning unit, thereby supplying the dehumidified and cooled air to the room to be air-conditioned.

Description

本発明は、オフィス空間における空調システムに関し、特に夏期冷房時にクールビズを実施した場合の不快感（蒸し暑さ）を改善することが可能な空調システムに関する。   The present invention relates to an air conditioning system in an office space, and more particularly to an air conditioning system capable of improving discomfort (steaming heat) when cool biz is implemented during summer cooling.

地球温暖化の防止という観点から、オフィス空間の空調システムにおいても夏期はクールビズを採用することが求められ、従来よりも高い室温に設定することが必要になってきた。一般に冷房は、「温度を下げる冷却」と「空気中の湿度を下げる除湿」により行われており、除湿と冷却は１つの空調機で処理されるのが普通である。空調機では、外気と還気を混合して冷水コイルを通過させることにより、最初に「冷却（顕熱処理）」が行われ、次に冷却と同時に空気中の水分を除去する「冷却除湿（潜熱処理）」が実行される。しかしながら、クールビズでは設定温度が高いため、冷却除湿が不充分なまま冷却が完了し、湿度が高くなって不快感が高まることになる。   From the viewpoint of preventing global warming, it is required to use cool biz in the summer in the air conditioning system of the office space, and it has become necessary to set the room temperature higher than before. In general, cooling is performed by “cooling for lowering the temperature” and “dehumidification for lowering the humidity in the air”, and the dehumidification and cooling are usually performed by one air conditioner. In an air conditioner, outside air and return air are mixed and passed through a chilled water coil, so that “cooling (sensible heat treatment)” is first performed, and then “cooling dehumidification (latent heat) that removes moisture in the air simultaneously with cooling. Process) "is executed. However, since the set temperature is high in Cool Biz, cooling is completed with insufficient cooling and dehumidification, and the humidity becomes high, resulting in increased discomfort.

前述した顕熱処理と潜熱処理とを分離して実行する空調システムとして以下の空調システムが知られている。   The following air conditioning systems are known as air conditioning systems that perform the sensible heat treatment and the latent heat treatment separately.

特開平１１−２９４８３２「空気調和装置」には、在室者１名当たりに必要な最小限度の外気量で在室者１名分の潜熱を打ち消すことができる以上の除湿能力を持つように取り入れ外気の露点を約７℃まで下げて室内へ供給し、室内では顕熱だけを冷却する空調装置が記載されている。その構成として、スタティック型の氷蓄熱槽を包含するチラーユニットでキャピラリーチューブを氷蓄熱用蒸発器に使用して直接冷媒ガスで製氷し、エネルギー消費効率の向上を図っている。In Japanese Patent Application Laid-Open No. 11-294432 “Air Conditioner”, it is incorporated so as to have a dehumidifying capacity that can cancel out the latent heat of one occupant with the minimum amount of outside air required per occupant. An air conditioner is described in which the dew point of outside air is lowered to about 7 ° C. and supplied to the room, and only the sensible heat is cooled in the room. As a configuration, a chiller unit including a static type ice heat storage tank is used to make ice with a refrigerant gas directly using a capillary tube for an ice heat storage evaporator to improve energy consumption efficiency.

本発明の目的は、夏期冷房時にクールビズを実施した場合の不快感（蒸し暑さ）を改善することが可能な空調システムを提供することにある。   The objective of this invention is providing the air conditioning system which can improve the discomfort (steaming heat) at the time of implementing a cool biz at the time of summer cooling.

本発明は、空調対象室内に向けて外気を除湿処理した乾燥空気（以下、低温低湿空気という）を送給する潜熱処理ラインと、空調対象室から排出される発熱空気の暑い熱を冷却処理して涼しい空気を空調対象室へと送給する顕熱処理ラインとを備える空調システムであって、その基本構成として、過冷却水からシャーベット状の氷を製氷して蓄熱するダイナミック型氷蓄熱槽と、ヒートポンプチラーなどの冷熱源機器と、ファンと冷却除湿コイルとを含む外調機と、ファンと冷却コイルとを含むファン付き冷却コイルユニットと、各種の配管設備及び制御機器とを包含する。   The present invention includes a latent heat treatment line for supplying dry air (hereinafter referred to as low-temperature low-humidity air) obtained by dehumidifying outside air toward the air-conditioning target room, and cooling the hot heat of the exothermic air discharged from the air-conditioning target room. An air conditioning system including a sensible heat treatment line that supplies cool and cool air to the air-conditioned room, and as a basic configuration thereof, a dynamic ice storage tank that stores ice by making sherbet-like ice from supercooled water, and It includes a cold heat source device such as a heat pump chiller, an external air conditioner including a fan and a cooling dehumidification coil, a cooling coil unit with a fan including a fan and a cooling coil, and various piping facilities and control devices.

前記ダイナミック型氷蓄熱槽は、氷蓄熱槽の底部付近から０℃近傍の冷水を汲み上げる第１のポンプと、汲み上げた冷水の冷熱で前記外調機からの戻り低温水を冷却する熱交換器と、熱交換器で冷却された冷水を前記外調機へと送給する第２のポンプとを包含しており、前記ファン付き冷却コイルユニットは空調対象室に隣接して配置され空調対象室へと冷気を送給しかつ空調対象室からの還気を受け入れるように配置されており、前記外調機は前記ダイナミック型氷蓄熱槽からの低温冷水の供給を受けて外気を約９℃まで冷却除湿し、低温低湿空気を前記ファン付き冷却コイルユニットへと送給することができる。   The dynamic ice storage tank includes a first pump that pumps cold water at around 0 ° C. from near the bottom of the ice storage tank, and a heat exchanger that cools the return low-temperature water from the external air conditioner with the cold heat of the pumped cold water. And a second pump that feeds the cold water cooled by the heat exchanger to the external air conditioner, and the cooling coil unit with the fan is disposed adjacent to the air-conditioning target room and is connected to the air-conditioning target room. The cooler is arranged to receive the return air from the air-conditioning target room, and the external air conditioner cools the outside air to about 9 ° C. by receiving the low-temperature cold water from the dynamic ice storage tank. Dehumidification is performed, and low-temperature and low-humidity air can be supplied to the cooling coil unit with a fan.

これにより、前記ファン付き冷却コイルユニットは、前記冷熱源機器からの低温冷媒の供給を受けると同時に前記外調機からの低温低湿空気の供給を受けて、空調対象室へと除湿されかつ冷却された空気を供給できるようになっている。   As a result, the cooling coil unit with fan is dehumidified and cooled to the air-conditioning target room by receiving the supply of the low-temperature refrigerant from the cold source device and simultaneously receiving the low-temperature and low-humidity air from the external air conditioner. Air can be supplied.

すなわち、本発明によるダイナミック型氷蓄熱によるクールビズ対応空調システムでは、外調機がダイナミック型氷蓄熱槽からの低温冷水の供給を受けて外気を約９℃まで冷却除湿し、低温低湿空気をファン付き冷却コイルユニットへと送給する配管が潜熱処理ラインを構成し、ファン付き冷却コイルユニットが冷熱源機器からの低温冷媒の供給を受けて空調対象室へと冷却された空気を供給する配管が顕熱処理ラインを構成しており、潜熱処理ラインと顕熱処理ラインとが合流することにより、ファン付き冷却コイルユニットから空調対象室へと除湿されかつ冷却された空気が供給されることになる。   That is, in the cool biz compatible air conditioning system using dynamic ice heat storage according to the present invention, the external air conditioner receives the supply of low temperature cold water from the dynamic ice heat storage tank, cools and dehumidifies the outside air to about 9 ° C, and supplies the low temperature and low humidity air with a fan. The piping that feeds the cooling coil unit constitutes a latent heat treatment line, and the cooling coil unit with a fan receives the supply of the low-temperature refrigerant from the cold source device, and the piping that supplies the cooled air to the air-conditioning target chamber appears. A heat treatment line is configured, and the latent heat treatment line and the sensible heat treatment line join together, whereby dehumidified and cooled air is supplied from the cooling coil unit with a fan to the air-conditioning target room.

ダイナミック型氷蓄熱システムとしては、例えば特許第４５１４８０４号（特開２００９−１９８１０５）に開示されているようなシステムを採用することができ、スタティック型の氷蓄熱システムに比べて解氷特性が優れ、外気の潜熱負荷変動に対し追従性が良いという利点がある。   As a dynamic type ice heat storage system, for example, a system as disclosed in Japanese Patent No. 4514804 (Japanese Patent Laid-Open No. 2009-198105) can be adopted, and the ice melting characteristics are superior to a static type ice heat storage system, There is an advantage that the followability is good with respect to the latent heat load fluctuation of the outside air.

かかる構成に基づき、本発明による空調システムでは、クールビズに対応しつつ除湿された冷気を空調対象室へと送給できることになり、蒸し暑い不快感を感じることなく、快適なオフィス環境が実現できることになる。   Based on such a configuration, in the air conditioning system according to the present invention, the dehumidified cold air corresponding to cool biz can be supplied to the air conditioning target room, and a comfortable office environment can be realized without feeling hot and uncomfortable. .

本発明による空調システムの概念を表す概略図。Schematic showing the concept of the air-conditioning system by this invention. 本発明による空調システムの冷房運転時を表す配管図。The piping diagram showing the time of air conditioning operation of the air-conditioning system by the present invention.

図１は本発明による空調システムの概念を表しており、外気の湿気を取り除いた低温低湿空気を空調対象室１０内に向けて送給する潜熱処理ラインＡと、空調対象室１０から排出される発熱空気の暑い熱を冷却処理して涼しい空気を空調対象室１０へと送給する顕熱処理ラインＢとを備える空調システムであり、除湿・冷却分離空調システムということもできる。   FIG. 1 shows a concept of an air conditioning system according to the present invention, and is discharged from a latent heat treatment line A for supplying low-temperature, low-humidity air from which outside moisture has been removed toward the air-conditioned room 10 and the air-conditioned room 10. This is an air conditioning system including a sensible heat treatment line B that cools hot heat of the heat generation air and supplies cool air to the air-conditioning target room 10, and can also be referred to as a dehumidification / cooling separation air conditioning system.

図２は本発明による空調システムの冷房運転時を表す配管図である。本発明は基本的にクールビズが適用される夏期冷房時期に向けて設計されたシステムであり、その他の時期においては必要に応じて配管の接続方法を変えるなどの対策をとることができる。   FIG. 2 is a piping diagram showing the cooling operation of the air conditioning system according to the present invention. The present invention is basically a system designed for the summer cooling period to which Cool Biz is applied, and measures such as changing the pipe connection method can be taken as necessary at other periods.

図２のシステムは、過冷却水からシャーベット状の氷を製氷して蓄熱するダイナミック型氷蓄熱槽２０と、空冷式ヒートポンプチラーや冷温水発生機などの冷熱源機器１２と、ファンと冷却除湿コイルとを含む外調機１４と、ファンと冷却コイルとを含むファン付き冷却コイルユニット１６と、各種の配管設備及び制御機器とを包含する。   The system shown in FIG. 2 includes a dynamic ice storage tank 20 for making and storing sherbet-like ice from supercooled water, a cold heat source device 12 such as an air-cooled heat pump chiller or a cold / hot water generator, a fan, and a cooling and dehumidifying coil. Including a cooling coil unit 16 with a fan including a fan and a cooling coil, and various piping facilities and control equipment.

ダイナミック型氷蓄熱槽２０は、図示しないブライン冷凍機で過冷却状態にまで冷却された水を氷に変化させることにより、シャーベット状の氷２２が槽内に蓄積されている。このダイナミック型氷蓄熱槽２０には、氷蓄熱槽の底部付近から０℃近傍の冷水を汲み上げる第１のポンプ４０と、汲み上げた冷水の冷熱で外調機１４からの戻り低温水（戻り配管３０）を冷却する熱交換器４２と、熱交換器４２で冷却された冷水を外調機１４へと（冷水配管２８を通じて）送給する第２のポンプ４４とが付設されている。   In the dynamic ice heat storage tank 20, sherbet-like ice 22 is accumulated in the tank by changing the water cooled to a supercooled state by a brine refrigerator (not shown) into ice. The dynamic ice storage tank 20 includes a first pump 40 that pumps cold water near 0 ° C. from near the bottom of the ice storage tank, and low-temperature water returned from the external conditioner 14 by the cool heat of the pumped cold water (return pipe 30 ) And a second pump 44 for feeding the cold water cooled by the heat exchanger 42 to the external air conditioner 14 (through the cold water pipe 28).

ファン付き冷却コイルユニット（ドライコイルユニット）１６は、空調対象室１０に隣接して配置され、空調対象室１０へと冷気（ＳＡ）を送給しかつ空調対象室からの還気（ＲＡ）を受け入れるように配置されている。
外調機１４はダイナミック型氷蓄熱槽２０からの低温冷水（冷水配管２８を通じて供給される）の供給を受けて、外気を約９℃まで冷却除湿し、低温低湿空気配管１８を通じて低温低湿空気をファン付き冷却コイルユニット１６へと送給する。低温低湿空気は各フロア毎の低温低湿配管（ドライコイルダクトシャフト）１８ａ，１８ｂ，１８ｃを通じて各フロアのファン付き冷却コイルユニット１６へと送給される。 The cooling coil unit with a fan (dry coil unit) 16 is disposed adjacent to the air-conditioning target room 10, supplies cool air (SA) to the air-conditioning target room 10, and returns return air (RA) from the air-conditioning target room 10. Arranged to accept.
The external conditioner 14 receives supply of low-temperature cold water (supplied through the cold water pipe 28) from the dynamic ice storage tank 20, cools and dehumidifies the outside air to about 9 ° C., and supplies low-temperature low-humidity air through the low-temperature low-humidity air pipe 18. It feeds to the cooling coil unit 16 with a fan. The low-temperature, low-humidity air is supplied to the cooling coil unit 16 with a fan on each floor through low-temperature, low-humidity pipes (dry coil duct shafts) 18a, 18b, 18c for each floor.

またファン付き冷却コイルユニット１６は、冷熱源機器１２からの低温冷媒（冷媒配管２４を通じて）の供給を受けると同時に外調機１４からの低温低湿空気の供給を受けて、空調対象室１０へと除湿されかつ冷却された空気を供給できるようになっている。コイルユニット１６内で処理された後の冷媒は冷媒配管２６を通じて冷熱源機器１２へと戻される。   Further, the cooling coil unit 16 with the fan receives the supply of the low-temperature refrigerant (through the refrigerant pipe 24) from the cold heat source device 12 and at the same time receives the supply of the low-temperature and low-humidity air from the external air conditioner 14 to the air conditioning target room 10. Dehumidified and cooled air can be supplied. The refrigerant after being processed in the coil unit 16 is returned to the cold heat source device 12 through the refrigerant pipe 26.

なお、図２のシステムでは床吹出し方式を採用しているが、配管の接続方法を変えることにより、天井吹出し方式にも本発明を適用することができる。   In addition, although the floor blowing system is employ | adopted in the system of FIG. 2, this invention is applicable also to a ceiling blowing system by changing the connection method of piping.

かくして、本発明による空調システムでは、外気の湿気を取り除いた低温低湿空気を空調対象室１０内に向けて送給する潜熱処理ラインＡと、空調対象室１０から排出される発熱空気の暑い熱を冷却処理して涼しい空気を空調対象室１０へと送給する顕熱処理ラインＢとが有機的に結合され、クールビズに対応した快適な除湿・冷却分離空調システムが実現できることになる。   Thus, in the air conditioning system according to the present invention, the latent heat treatment line A for supplying low-temperature, low-humidity air from which the outside air has been removed toward the air-conditioned room 10 and the hot heat of the exothermic air discharged from the air-conditioned room 10 are obtained. The sensible heat treatment line B that cools and supplies cool air to the air-conditioning target room 10 is organically coupled, so that a comfortable dehumidification / cooling separation air conditioning system corresponding to cool biz can be realized.

以上詳細に説明した如く、本発明による空調システムによれば、クールビズに対応しつつ除湿された冷気を空調対象室へと送給できることになり、蒸し暑い不快感を感じることなく、快適なオフィス環境が実現できるようになるなど、その技術的価値には極めて顕著なものがある。   As described above in detail, according to the air conditioning system of the present invention, the dehumidified cold air corresponding to cool biz can be supplied to the air conditioning target room, and a comfortable office environment can be provided without feeling hot and uncomfortable. Its technical value is extremely remarkable, such as being able to be realized.

Ａ 潜熱処理ライン Ｂ 顕熱処理ライン
１０ 空調対象室 １２ 冷熱源機器
１４ 外調機 １６ コイルユニット
１８ 低温低湿空気配管 ２０ 氷蓄熱槽
２４，２６ 冷媒配管 ２８ 冷水配管
４０，４４ ポンプ ４２ 熱交換器 A latent heat treatment line B sensible heat treatment line 10 air-conditioning target room 12 cold heat source equipment 14 external air conditioner 16 coil unit 18 low-temperature low-humidity air pipe 20 ice heat storage tank 24, 26 refrigerant pipe 28 cold water pipe 40, 44 pump 42 heat exchanger

Claims (1)

空調対象室内に向けて外気を除湿処理した低温低湿空気を送給する潜熱処理ラインと、空調対象室から排出される発熱空気の暑い熱を冷却処理して涼しい空気を空調対象室へと送給する顕熱処理ラインとを備える空調システムであって、
過冷却水からシャーベット状の氷を製氷して蓄熱するダイナミック型氷蓄熱槽と、ヒートポンプチラーなどの冷熱源機器と、ファンと冷却除湿コイルとを含む外調機と、ファンと冷却コイルとを含むファン付き冷却コイルユニットと、各種の配管設備及び制御機器とを包含し、
前記ダイナミック型氷蓄熱槽は、氷蓄熱槽の底部付近から０℃近傍の冷水を汲み上げる第１のポンプと、汲み上げた冷水の冷熱で前記外調機からの戻り低温水を冷却する熱交換器と、熱交換器で冷却された冷水を前記外調機へと送給する第２のポンプとを包含しており、
前記ファン付き冷却コイルユニットは空調対象室に隣接して配置され空調対象室へと冷気を送給しかつ空調対象室からの還気を受け入れるように配置されており、
前記外調機は前記ダイナミック型氷蓄熱槽からの低温冷水の供給を受けて外気を約９℃まで冷却除湿し、低温低湿空気を前記ファン付き冷却コイルユニットへと送給することができ、
前記ファン付き冷却コイルユニットは、前記冷熱源機器からの低温冷媒の供給を受けると同時に前記外調機からの低温低湿空気の供給を受けて、空調対象室へと除湿されかつ冷却された空気を供給できるようになっていることを特徴とするダイナミック型氷蓄熱によるクールビズ対応空調システム。 A latent heat treatment line that delivers low-temperature, low-humidity air that has been dehumidified from the outside air toward the air-conditioned room, and cool air is sent to the air-conditioned room by cooling the hot heat generated from the air-conditioned room. An air conditioning system comprising a sensible heat treatment line,
Includes a dynamic ice storage tank that makes sherbet-shaped ice from supercooled water to store heat, a heat source device such as a heat pump chiller, an external air conditioner that includes a fan and a cooling and dehumidifying coil, and a fan and a cooling coil Includes a cooling coil unit with a fan, various piping equipment and control equipment,
The dynamic ice storage tank includes a first pump that pumps cold water at around 0 ° C. from near the bottom of the ice storage tank, and a heat exchanger that cools the return low-temperature water from the external air conditioner with the cold heat of the pumped cold water. A second pump for feeding cold water cooled by a heat exchanger to the external air conditioner,
The cooling coil unit with a fan is arranged adjacent to an air conditioning target room and is arranged to supply cold air to the air conditioning target room and receive return air from the air conditioning target room,
The external conditioner is supplied with low-temperature cold water from the dynamic ice heat storage tank, cools and dehumidifies the outside air to about 9 ° C., and can supply low-temperature and low-humidity air to the cooling coil unit with the fan.
The cooling coil unit with a fan receives the supply of the low-temperature refrigerant from the cold-heat source device and at the same time receives the supply of the low-temperature and low-humidity air from the external controller, Cool Biz compatible air conditioning system with dynamic ice heat storage, characterized by being able to supply.
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013125236A1 (en) 2012-02-23 2013-08-29 パナソニック株式会社 Vehicle-mounted charging device, and vehicle mounted with same
CN112460704A (en) * 2020-11-23 2021-03-09 珠海格力电器股份有限公司 Control device and method of ice cold storage system and ice cold storage system

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JPH11108526A (en) * 1997-10-02 1999-04-23 Mitsubishi Electric Corp Cooling unit
JPH11294832A (en) * 1998-04-08 1999-10-29 Tomoko Iida Air conditioner
JP2000310433A (en) * 1999-04-27 2000-11-07 Kazutaro Oyabu Ice storage air conditioning system
JP2010002162A (en) * 2008-06-22 2010-01-07 Kiyoshi Yanagimachi Air conditioning facility

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JPH11108526A (en) * 1997-10-02 1999-04-23 Mitsubishi Electric Corp Cooling unit
JPH11294832A (en) * 1998-04-08 1999-10-29 Tomoko Iida Air conditioner
JP2000310433A (en) * 1999-04-27 2000-11-07 Kazutaro Oyabu Ice storage air conditioning system
JP2010002162A (en) * 2008-06-22 2010-01-07 Kiyoshi Yanagimachi Air conditioning facility

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Publication number Priority date Publication date Assignee Title
WO2013125236A1 (en) 2012-02-23 2013-08-29 パナソニック株式会社 Vehicle-mounted charging device, and vehicle mounted with same
CN112460704A (en) * 2020-11-23 2021-03-09 珠海格力电器股份有限公司 Control device and method of ice cold storage system and ice cold storage system
CN112460704B (en) * 2020-11-23 2021-12-14 珠海格力电器股份有限公司 Control device and method of ice cold storage system and ice cold storage system

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