JP2002061911A - Method for cooling computer room - Google Patents

Method for cooling computer room

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Publication number
JP2002061911A
JP2002061911A JP2000247386A JP2000247386A JP2002061911A JP 2002061911 A JP2002061911 A JP 2002061911A JP 2000247386 A JP2000247386 A JP 2000247386A JP 2000247386 A JP2000247386 A JP 2000247386A JP 2002061911 A JP2002061911 A JP 2002061911A
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Japan
Prior art keywords
air
cooling
chamber
computer room
temperature
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Pending
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JP2000247386A
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Japanese (ja)
Inventor
Shigeo Kubo
繁男 久保
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Takasago Thermal Eng Co Ltd
高砂熱学工業株式会社
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Priority to JP2000247386A priority Critical patent/JP2002061911A/en
Publication of JP2002061911A publication Critical patent/JP2002061911A/en
Application status is Pending legal-status Critical

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Abstract

PROBLEM TO BE SOLVED: To reduce the volume of circulating air and, at the same time, the quantity of refrigerant used by a refrigerating machine at the time of cooling a high-density computer room by circulating the air.
SOLUTION: Air-conditioned air from an air-conditioner 3 is blown into the computer room R at a low speed from a space under the floor through a supply air duct 4. The exhaust air from the room R is collected from the ceiling section of the room R and its vicinity through a return air duct 9 and returned to the air conditioner 9. The exhaust air returned to the air conditioner 3 is again supplied as air-conditioned air after the air is successively cooled by means of cooling coils 11 and 12. The temperature of the air-conditioned air is adjusted so that the temperature difference between the outlet temperature of the supply air duct 4 and the inlet temperature of the return air duct 9 becomes 15-25°C.
COPYRIGHT: (C)2002,JPO

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は,電算機室,とりわけいわゆる電算センターなどと称される高密度,高負荷の電算機室を冷房するのに適した,電算機室の冷房方法に関するものである。 BACKGROUND OF THE INVENTION The present invention is, computer room, such as a designated the dense inter alia so-called computerized center, suitable for cooling the computer room of a high load, relates Cooling method computer room is there.

【0002】 [0002]

【従来の技術】電算機,すなわち電子計算機(コンピュータ装置)は安定して稼働させる必要上,一定の温度に維持された室(いわゆる電算機室)内に設置されている。 BACKGROUND ART computing machine, namely electronic computer (computer system) is installed stably on the need to run, within the chamber that is maintained at a constant temperature (so-called computer room). この場合,電算機は高熱を発生するため,電算機室は四季を通じて冷房運転がなされている。 In this case, computerized machine for generating a high heat, computer room cooling operation have been made throughout the year. しかしながら電算センターでは24時間連続して稼働しているので, However, since the computerized center has been running continuously for 24 hours,
多量のエネルギーが消費される。 A large amount of energy is consumed. そのため,従来から省エネルギー効果を狙った冷房方法,冷房装置が提案されている。 Therefore, cooling method aimed at energy savings from prior art, the cooling device has been proposed.

【0003】例えば特許第1979061号公報には, [0003] For example, Japanese Patent No. 1979061,
室内機に前後二段の熱交換器を設置し,後段側の熱交換器は冷凍機によって常時運転させ,前段側の熱交換器は,冷凍機又は冷却塔により切換運転可能に各々水循環系を形成した自然冷却空調装置が提案されている。 Installing heat exchangers before and after the two-stage to the indoor unit, the heat exchanger of the subsequent stage side is always operated by the refrigerator, the heat exchanger of the first-stage, switching operable to each water circulation system by the refrigerator or cooling tower the formed naturally cooled air conditioning system has been proposed. これによって,外気の温度が室内空気よりも低い時期においては,当該外気と冷却水の気液接触の作用で,省エネルギー化を図ろうとするものである。 Thus, in the outside air temperature is time lower than the room air, the action of the gas-liquid contact of the outside air and the cooling water, it is an attempt is made to save energy.

【0004】 [0004]

【発明が解決しようとする課題】しかしながら,従来方式は電算機保護の考え方から循環風量が非常に大きく, The object of the invention is to be Solved However, the conventional method is very large amount of circulating air from the concept of computerized machine protection,
かつ給気と,還気用に使用する還気との吹き出し温度差が非常に小さい。 And air supply and, very small outlet temperature difference between the return air to be used for the return air. 例えば従来では,給気の温度(給気ダクトの出口温度)が18℃〜20℃で,前記還気の温度(還気ダクトの入口温度)は,23℃〜25℃程度であり,最大でもその温度差は7℃程度である。 For example, in the prior art, at the 18 ° C. to 20 ° C. (outlet temperature of the air supply duct) temperature of the air supply, the temperature of the return air (inlet temperature of the return air duct) is 23 ° C. to 25 ° C. approximately, at most the temperature difference is about 7 ° C.. このため給還気量も大きく設定されており,例えば約300m Therefore supply return air amount is set larger, for example about 300 meters 3 /
H・m となるように設定されている。 Are set such that H · m 2.

【0005】ところで最近の高密度電算機室,すなわち空間内に多くの台数の電算機を設置している室においては,天井高が約4mと従来より30%以上も高く設計され,その室内に全高の高いコンピュータ装置やラックに多段に積み重ねた構成のコンピュータ装置が高密度で配置されている。 [0005] Recently high density computer room, that is, in the chamber has installed computerized machine many number in the space, the ceiling height is also designed higher about 4m and conventional than 30% or more, to the chamber overall height high computer apparatus or a computer apparatus rack structure stacked in multiple stages are arranged at a high density.

【0006】そのため,従来方式によってかかる高密度電算機室の冷房を実施しようとすると,極めて多い風量で空調空気を供給,還気しなければならず,その結果循環空気量が多くなり,それに伴って空調設備も大型化せざるを得なかった。 [0006] Therefore, an attempt to implement the cooling of high-density computer room according the conventional method, supplying conditioned air at a very high air volume, it is necessary to return air, the number of result circulating air volume, accordingly air conditioning equipment Te also had to be large in size. また前記電算機室から排出される空気温度は最高でも25℃程度であり,夏期においては外気よりもその温度が低くなるため,室内の発生熱を外気中に排出することができないし,また中間期・冬期における外気を利用した外気冷房効果も少なく,さらに適用期間も短いという問題があった。 The temperature of the air discharged from the computer room is about 25 ° C. at most, since the temperature than the outside air is low in summer, to not be able to discharge the indoor heat generated in the outside air, and the intermediate outdoor air cooling effect even less using the outside air in the year-winter, there is a problem that further application period is short.

【0007】本発明はかかる点に鑑みてなされたものであり,近年のコンピュータ装置の耐用温度特性に着目し,循環空気風量を大幅に減少させて,冷房空気循環設備等の小型化を図ることを目的とするものである。 [0007] The present invention has been made in view of the above, focusing the useful temperature characteristic of recent computer system, greatly reducing the circulating air air volume, to reduce the size of such cooling air circulation equipment the it is an object of the present invention.

【0008】 [0008]

【課題を解決するための手段】前記目的を達成するため,請求項1によれば,電算機を設置した室に空調装置からの空調空気を供給すると共に,前記室からの還気を前記空調装置に戻して再び処理する冷房空気循環系を有する,電算機室の冷房方法であって,前記空調空気を, To achieve the above object, according to an aspect of, according to claim 1, supplies the conditioned air from the air conditioner to the chamber were installed computerized machine, the conditioning of the return air from the chamber having a cooling air circulation system for processing again returns to the apparatus, a cooling method of the computer room, the conditioned air,
前記電算機の耐用温度よりも15℃〜25℃低い温度に設定すると共に前記空調空気の吹出し風速を低速に設定して前記室の下方から前記室内に吹き出させ,さらに前記室の天井部付近から還気をとることを特徴とする,電算機室の冷房方法が提供される。 The blowing velocity of the conditioned air is set to a low speed so blown into the chamber from below the chamber, the further ceiling near the chamber and sets to 15 ° C. to 25 ° C. lower temperature than the service temperature of the computerized machine wherein the take return air, cooling method of the computer room is provided.

【0009】近年のコンピュータ装置の耐用温度は,概ね40℃程度である。 [0009] tolerable temperature of recent computer system, is generally 40 ° C. or so. また発熱量が大きい室を空調する際の循環空気量を抑える空調方法としては,低速で給気を下方から室内に吹き出させ,天井部から還気するいわゆる成層空調が適しているが,発明者の知見では,電算機室内における最も高い温度の部分,すなわち天井付近の温度が,最高でも40℃〜45℃程度に抑えれば,電算機の稼働に支障がない。 As the air-conditioning method of suppressing the circulating air amount when the air-conditioning heat generation amount is large chamber, the air supply at low speed blown from below into the room, so-called stratified air-conditioning is suitable for return air from the ceiling, the inventors the findings, the highest temperature portion of the computing machine room, that is, the temperature in the vicinity of the ceiling, if Osaere about 40 ° C. to 45 ° C. at most, there is no trouble in operation of Computer. そして約4m程度の高さを有する高密度電算機室に対して,例えば0.1m/s〜 The high-density computer room with about 4m as high as, for example, 0.1 m / s to
0.6m/sの低速で下方から,例えば床面から空調空気を吹き出させるようにし(室の側面下方から吹き出させる場合には0.1m/s〜0.6m/s,床面から吹き出させる場合には0.25m/s以下),さらに前記耐用温度よりも15℃〜25℃低い温度,すなわち15 From below a slow 0.6 m / s, and then blowing 0.1m / s~0.6m / s, from the floor in the case for example so as to blow out conditioned air from the floor and then blowing from the side lower (the chamber below 0.25 m / s in the case), further the 15 ° C. to 25 ° C. lower temperature than tolerable temperature, i.e. 15
℃〜25℃程度に給気の温度を設定して,これを電算機室内に供給すれば,天井部から還気の温度が40℃に抑えられることがわかった。 ° C. and the temperature of the supply air to approximately to 25 ° C., if supply it to the computerized machine room, the temperature of the return air from the ceiling portion was found to be suppressed to 40 ° C.. この温度は夏期の外気温度より高温である。 This temperature is a temperature higher than the outside air temperature of the summer. したがって,電算機の稼働に支障を与えることなく,かつ夏期においても発生熱を外気へと放熱することが可能になる。 Accordingly, without giving any trouble to the operation of Computer and it becomes possible to radiate the heat generated to the outside air in the summer. また前記したように,空調空気の吹出し風速を,例えば0.1m/s〜0.6m/sの低速に設定することで,電算機室に対していわゆる成層空調を実施することができ,冷気や高温空気が局所に滞ることなく,全体としてむらのない空調を実施することが可能である。 Also as described above, the blowing wind speed of the conditioned air, for example, by setting the low-speed 0.1m / s~0.6m / s, it is possible to carry out so-called stratified air conditioner with respect to the computer room, cold air and hot air without stagnation topical, it is possible to carry out air-conditioning without unevenness as a whole. しかも換気回数については,従来100 Moreover, for the ventilation number of times, conventional 100
回/hであったのが,20回/h〜50回/h程度で済み,この点からも省エネルギー効果が確認できる。 That there was a dose / h, it requires only about 20 times / h~50 times / h, energy-saving effect can be confirmed also from this point.

【0010】本発明の別な観点によれば,請求項2に記載したように,電算機を設置した室に空調装置からの空調空気を供給すると共に,前記室からの還気を前記空調装置に戻して再び処理する冷房空気循環系を有する,電算機室の冷房方法であって,前記室へ空調空気を供給する給気ダクトの出口温度と,前記室の天井部付近の滞留空気を排出する還気ダクトの入口温度との温度差が,1 According to another aspect of the invention, as described in claim 2, supplies the conditioned air from the air conditioner to the chamber were installed computerized machine, the air conditioner return air from the chamber having a cooling air circulation system for treatment again returned to, a cooling method of the computer room, exhaust and outlet temperature of the air supply duct for supplying conditioned air into the chamber, the retention of air near the ceiling portion of the chamber temperature difference between the inlet temperature of the return air duct is 1
5℃〜25℃となるように,前記空調空気の吹出温度を調整することを特徴とする,電算機室の冷房方法が提供される。 5 ° C. so as to to 25 ° C., and adjusting the outlet temperature of the conditioned air, cooling method of the computer room is provided.

【0011】既述したように,従来は給気と還気の温度差が小さい状態で電算機室の冷房を実施していたので, [0011] As already mentioned, the prior art had performed the cooling of the computer room in a state the temperature difference of the air supply and return air is small,
冷房空気の循環量を多く必要としていた。 It has been with many require a circulation amount of the cooling air. したがって, Therefore,
かかる温度差を請求項2のように,15℃〜25℃というように大きくとることにより,給気風量,還気風量, As claim 2 such temperature difference, by taking and so 15 ° C. to 25 ° C. increases, the supply air flow rate, the return air air volume,
すなわち空気循環風量を大幅に低減させることが可能になる。 That it is possible to significantly reduce air circulation air volume.

【0012】前記冷房方法においては,請求項3のように,夏期の昼間時(通常他の一般居住室が冷房している時期)を除き,前記冷房空気循環系に,法規で定められた汚染物質の許容濃度を達成するために必要な外気導入量を越える外気を取り入れるようにしてもよい。 [0012] In the cooling method, as claimed in claim 3, except during daytime in summer (usually time to other general residential chamber is cooling), the cooling air circulation system, as defined by law contamination it may be Fresh air exceeding the air introduction amount necessary to achieve an acceptable concentration of the substance. また請求項4のように,夏期の昼間時に,前記冷房空気循環系に,法規で定められた汚染物質の許容濃度を達成するために必要な外気導入量を越える外気を取り入れるようにしてもよい。 Also, as claimed in claim 4, the daytime in summer, the cooling air circulation system, may be Fresh air exceeding the air introduction amount necessary to achieve an acceptable contaminant concentration prescribed by law . ここで法規で定められた汚染物質の許容濃度とは,建築物における衛生的環境の確保に関する法律(いわゆるビル管理法)施行令第2条に掲げるものをいう。 Here, the allowable concentration of pollutants stipulated by law, the law (the so-called Building Management Law) for Maintenance of Sanitation in buildings refers to those listed in the Enforcement Ordinance Article 2. 前記したように,電算機室からの還気は40℃程度であるから,外気よりも温度が高いので,逆に外気を法規で定められた必要量以上に積極的に循環系に取り入れることで,外気を積極的に冷房に利用することが可能である。 As described above, since the return air from the computer room is about 40 ° C., the temperature is higher than the outside air, by incorporating a positively circulatory system more than necessary defined outside air by legal conversely , it is possible to use to actively cool the outside air. したがって,外気冷房利用期間が四季を通じて可能であり,エネルギーの有効利用が図れる。 Therefore, outdoor air cooling period of use is possible throughout the year, can be effectively use of energy.

【0013】以上のような冷房方法を実施する場合の空調装置の構成は,請求項5のように,冷凍機からの冷媒を使用する冷却コイルを有し,前記冷凍機の凝縮器は冷却塔からの冷却水によって冷却される構成を有し,前記冷房空気循環系において,前記室からの還気を,冷却塔からの冷却水を使用して予冷するために設けた冷却器で熱交換した後,前記冷却コイルで処理するようにすれば,冷凍機の容量を小さく,かつ運転費用も少なくすることが可能である。 [0013] configuration of an air conditioning apparatus when carrying out the cooling method described above, as of claim 5, a cooling coil that uses the refrigerant from the refrigerator, the condenser of the refrigerator cooling tower has a structure that is cooled by the cooling water from, in the cooling air circulation system, the return air from the chamber, and heat exchange cooler provided for pre-cooling using cooling water from the cooling tower after, if for processing with the cooling coil, reduce the capacity of the refrigerator, and can be less operating cost. なお冷媒とは,冷水のみならず,フロン系ガスのような相変化する冷媒をも含むものである。 Note that the refrigerant is not cold only, but includes a phase change to a refrigerant such as freon gas. また冷却塔からの冷却水を使用して予冷するために設けた冷却器において使用する冷却水は,前記冷凍機の凝縮器を冷却するための冷却水と同一のものであってもよいし,他の別の冷却塔からの冷却水であってもよい。 The cooling water used in provided for pre-cooling using cooling water from the cooling tower cooler may be the same ones as the cooling water for cooling the condenser of the refrigerator, it may be a cooling water from other another cooling tower.

【0014】また請求項6のように,前記冷房空気循環系において,前記室からの還気をヒートパイプの一端に接触させた後に前記空調装置に戻して,その後例えば冷却コイル等で降温させる一方,前記ヒートパイプの他端は,冷却塔内の冷却部内に配置して冷却するようにすれば,前記冷却コイル等の容量を小さいものとすることができる。 [0014] As according to claim 6, in the cooling air circulation system, back into the air conditioning system return air from the chamber after contacting with one end of the heat pipe, while the temperature is lowered thereafter for example cooling coils, etc. the other end of the heat pipe, when to cool by placing the cooling portion of the cooling tower can be made small capacity such as the cooling coil. この場合,例えば蒸発式冷却塔を使用することも可能である。 In this case, it is also possible to use evaporative cooling tower.

【0015】 [0015]

【発明の実施の形態】以下,本発明の好ましい実施の形態について説明すると,図1は本発明の第1の実施の形態にかかる冷房方法を実施するための空調設備の系統の概略を示しており,冷房対象である高密度の電算機室R DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, referring to the preferred embodiments of the present invention, Figure 1 shows a schematic of a system of air conditioning equipment for carrying out the cooling method according to the first embodiment of the present invention cage, high density computer room R is cooling target
内には,コンピュータ装置1が多段に積み重ねられて多数配置されている。 The inner, computer device 1 are arranged in large numbers are stacked in multiple stages. この電算機室Rの床下には,床下チャンバ2が設けられ,空調装置3から給気ダクト4を通じて給気口5から床下チャンバ2内に供給された空調空気は,床面に形成された床吹出口6から低速で,電算機室R内へと吹き出されるようになっている。 Floor under the floor of the computer room R, underfloor chamber 2 is provided, conditioned air supplied under the floor chamber 2 from the air inlet 5 from the air conditioner 3 through the air supply duct 4, which is formed on the floor surface at low speed from the air outlet 6, adapted to be blown into the computer room in R.

【0016】一方前記電算機室Rの天井部には,スリット等の開口を持つ天井ボードと躯体天井との間に天井チャンバ7が設けられ,天井部付近の空気を還気ダクト9 [0016] On the other hand, the ceiling portion of the computer room R is a ceiling chamber 7 is provided between the ceiling board and the frame ceiling having openings such as slits, return air the air near the ceiling portion duct 9
の吸込口8から吸い込んで,還気ダクト9から還気として空調装置3へと戻すようになっている。 Inhale the suction mouth 8, so that the return to the air conditioner 3 as return air from the return air duct 9. したがって, Therefore,
空調装置3,給気ダクト4,電算機室R及び還気ダクト9で冷房空気循環系が構成されている。 Air conditioner 3, the air supply duct 4, the computer room cooling air circulation system R and the return air duct 9 is formed.

【0017】前記空調装置3は,上流側から順に,第1 [0017] The air conditioner 3 includes, in order from the upstream side, the first
の熱交換器である冷却コイル11(請求項4における冷却器に相当する),第2の熱交換器である冷却コイル1 Cooling coils 11 is a heat exchanger (corresponding to the cooler in claim 4), cooling coil 1 is a second heat exchanger
2,及び送風機13とを有し,冷却コイル11で1次冷却された空気を冷却コイル12で2次冷却した後,送風機13によって適宜のフィルタ(図示せず)を介して浄化された空調空気を給気ダクト4に送風する構成を有している。 2, and has a blower 13, after the being the primary cooling by the cooling coil 11 air and secondary cooling at the cooling coil 12, an appropriate filter conditioning was purified via (not shown) the air by the blower 13 It has a configuration sending air to the air supply duct 4. なお空調装置3には,前記還気ダクト9を通じて戻された電算機室Rからの還気と共に,外気取り入れダクト14から外気が導入されて,損失分(図示しない前記排気ダクトから建物外に排気される量)が補填されて,前記還気と混合された後,冷却コイル11,12によって処理されるようになっている。 Note that the air conditioner 3, an exhaust with return air from the returned computer room R through the return air duct 9, from the outside air intake duct 14 introduces outside air to the outside of the building from the exhaust duct losses (not shown is is the amount) is compensated after being mixed with the return air, and is processed by the cooling coils 11 and 12. なお図示は省略しているが,電算機室内で作業する作業者のため,新鮮外気の導入と汚染空気の排出が法規で定められており,そのための排気ダクト,排気ファン,さらにはモータダンパ等の排気量調整機構が別途設けられている。 Note Although not shown, for the operator to work on computing machine room, which is defined by the discharge of introduction and contaminated air fresh outside air regulations, the exhaust duct for the exhaust fan, more such motor-damping exhaust amount adjusting mechanism which is provided separately.

【0018】前記後段側の冷却コイル12は,冷却コイル11によって一次冷却された後の空気と,冷凍機21 The cooling coil 12 of the subsequent stage side, and air after being primary cooling by the cooling coil 11, the refrigerator 21
からの冷媒(冷水やフロン系冷媒)との間で熱交換されるようになっている。 It is adapted to be heat-exchange between the refrigerant (cold water or fluorocarbon refrigerant) from. 前記冷凍機21の凝縮器の冷却は,冷却塔31からの冷却水によって行われる。 Cooling the condenser of the refrigerator 21 is carried out by the cooling water from the cooling tower 31. すなわち,冷凍機21からの昇温した冷却水は,往管32を通じて冷却塔31に送られ,該冷却塔31で冷却された後,ポンプ33によって還管34を通じて再び冷凍機2 That is, heating and cooling water from the chiller 21 is sent to the cooling tower 31 through 往管 32, after being cooled in the cooling tower 31, again refrigerator through changing pipe 34 by the pump 33 2
1へと戻されて,凝縮器を冷却するようになっている。 It is returned to 1, so as to cool the condenser.

【0019】前記前段側の冷却コイル11は,空調装置3に導入された電算機室Rからの還気前記損失分を補填する外気との混合空気と,前記冷却塔31からの冷却水との間で熱交換することで,導入空気を冷却する構成を有している。 The cooling coil 11 of the front side, the mixing air with outside air to compensate for the return air the loss from the computer room R which is introduced into the air conditioner 3, the cooling water from the cooling tower 31 by heat exchange with, and has a structure for cooling the introduced air. すなわち冷却塔31では,冷却水を散水することで蒸発潜熱を奪い,冷却水は気温より低い温度に冷却される。 That is, in the cooling tower 31, deprives vaporization latent heat by sprinkling cooling water, the cooling water is cooled to lower than the temperature temperature. そのため,冷却コイル11には,往管34 Therefore, the cooling coil 11, 往管 34
に接続される分岐往管35と,還管32に接続される分岐還管36とが接続されており,冷却コイル11での熱交換によって昇温した冷却水は,分岐還管36,還管3 A branch 往管 35 connected to a branch instead pipe 36 is connected to Kaekan 32 and is connected, coolant temperature was raised by heat exchange with the cooling coils 11, branch instead pipe 36, Kaekan 3
2を通じて冷却塔31へと送られ,冷却塔31において冷却された冷却水は,往管34,分岐往管35を通じて冷却コイル11へと戻されるようになっている。 It sent to the cooling tower 31 through 2, cooling water cooled in the cooling tower 31, 往管 34, and is returned to the cooling coil 11 through branch 往管 35. なお前段の冷却コイル11と後段の冷却コイル12は,ともに1つの空調機内に納められる例を示したが,各々がコイルケーシングに納められ,それらが直列に接続されていても構わない。 Incidentally preceding cooling coil 11 and the rear stage of the cooling coil 12, an example to be both accommodated in one of the air-conditioning machine, each housed in the coil casing, they may be connected in series. 送風機についても同様であり,また前段コイルの上流側に位置していてもよい。 The same applies to the blower, or may be located upstream of the front coil. すなわち空調機器が必ずしも1つのユニット内に収納されていなくてもよく,見かけ上は多数のユニットに分散されていても全体として1つの空調装置として機能していればよい。 That may be the air conditioning equipment is not housed necessarily in a single unit, apparently it is sufficient to function as one of the air conditioner as a whole be distributed to a large number of units. したがって,本明細書ではそれらを空調装置という。 Thus, that they air conditioning apparatus herein.

【0020】第1の実施の形態にかかる電算機室の冷房方法を実施するための主要設備は以上のように構成されている。 The main equipment for performing such computer room cooling method to the first embodiment is constructed as described above. 次にその運転方法について説明する。 It will now be described a method of operating. 例えば電算機室R内に設置されているコンピュータ装置1の耐用温度が40℃であった場合,給気ダクト4を通じて床下チャンバ2内に供給される空調空気の温度は,還気ダクト9から排出される電算機室Rの還気温度が45℃となるように,例えば20℃に設定する。 For example, when the service temperature of the computer device 1 installed in the computer room in R was 40 ° C., the temperature of the conditioned air supplied under the floor chamber 2 through the air supply duct 4 is discharged from the return air duct 9 return air temperature of the computer room R to be the to be a 45 ° C., it is set to, for example, 20 ° C..

【0021】還気ダクト9の入口温度と,給気ダクト4 [0021] and the inlet temperature of the return air duct 9, air supply duct 4
の出口温度との温度差をそのように20℃と大きくとるようにすれば,給気風量が約100m /H・m と, If the difference in temperature between the outlet temperatures to take so large as 20 ° C., the supply air flow rate is about 100m 3 / H · m 2,
従来の約1/3程度で済む。 It requires only conventional of about one-third. またそのときの床面からの吹出し風速は,有効吹出し面積が1/2の場合でも0. The blowing wind from the floor at that time, the effective blow area even when 1/2 0.
1m/s以下であり,これによって,電算機室Rの床面から天井部にかけて次第に低温から高温となっていく空気層が形成され,いわゆる成層空調が実施される。 1 m / s or less, thereby, the air layer is formed to gradually become a low-temperature and high-temperature toward ceiling from the floor of the computer room R, so-called stratified air conditioning is performed. 因みに床面全面開口の場合には,0.55m/s以下でよく,結局有効吹出し面積の広狭によって吹出し風速を減じたり,増加させる。 Incidentally if the floor entire opening may hereinafter 0.55 m / s, or reduce the blowing wind speed by widening or narrowing of the effective blow area eventually increase.

【0022】以上のことから,空気循環系等を流れる空気量は,従来よりも大幅に低減され,給気ダクト4,還気ダクト9,送風機13等が従来よりも小型化することが可能である。 [0022] From the above, the amount of air flowing through the air circulation system or the like is reduced significantly than the conventional air supply duct 4, the return air duct 9, a blower 13 or the like can be made smaller than the conventional is there. また1次冷却を実施する冷却コイル11 The cooling coil 11 to carry out the primary cooling
による循環空気の予冷によって冷媒の使用量が低減でき,冷凍機31は小型のものを使用でき,運転コストを下げることが可能になっている。 Uses less refrigerant by precooling of the circulating air by refrigerator 31 can use a small size, it has been possible to reduce the operating costs.

【0023】前記実施の形態では,空調装置3に導入する外気は,損失分(図示しない前記排気ダクトから建物外に排気される量)の補填分のみであり,基本的には, [0023] In the embodiment, the outside air introduced into the air conditioner 3 is only compensation amount of loss (the amount that is exhausted from a not-shown the exhaust duct to the outside of the building), basically,
ビル管理法に規定される許容濃度を実現するに足るいわば純循環型の冷房運転であったが,還気ダクト9を流れる空気の温度が40℃と従来よりも飛躍的に高温であることから,夏期においてもこれをそのまま外気に放出し,一方でその分外気を取り入れて,外気冷却を利用した運転を実施することも提案できる。 Although, as it were a cooling operation of the net recycling sufficient to achieve an acceptable concentration as defined in building management method, since the temperature of the air flowing through the return air duct 9 is significantly hotter than 40 ° C. and conventional , which also was directly released to the outside air in the summer, while incorporating correspondingly outside air, it is also proposed to implement the operation using the outside air cooling.

【0024】図2は,そのような第2の実施の形態にかかる電算機室の冷房方法を実施するための空調設備の系統の概略を示しており,図1の構成と比べると,次の点が付加されている。 [0024] Figure 2 shows a schematic of the air conditioning equipment systems for carrying out the cooling process of such a computer room according to the second embodiment, as compared with the configuration of FIG. 1, the following a point is added. なお図2以下のシステム例では,同一部材,装置については,同一符号を付して,重複説明を省略してある。 Note that in Figure 2 the following system example, the same member, the apparatus are denoted by the same reference numerals are omitted redundant description.

【0025】すなわち図2の例では,還気ダクト9の途中に分岐する放出ダクト41を接続し,当該放出ダクト41に可変ダンパD ,分岐部から下流の還気ダクト9 [0025] That is, in the example of FIG 2, to connect the discharge duct 41 which branches in the middle of the return air duct 9, the emission variable damper D 1 in the duct 41, return air from the branch portion downstream of the duct 9
に可変ダンパD ,空調装置3へ外気を取り入れるための外気取り入れダクト14に可変ダンパD を設けてある。 Variable damper D 2, is provided with a variable damper D 3 to the outside air intake duct 14 for drawing outside air to the air conditioner 3 in. なお42は還気ダクト9に介装した還気用の送風機である。 Note 42 is a blower for return air that is interposed in the return air duct 9.

【0026】そして冷房運転を実施する際には,可変ダンパD ,D ,D を操作して放出ダクト41から外気に放出した分を外気取り入れダクト14から補填するようにして,空気循環系に外気を取り入れる。 [0026] Then in the practice of the cooling operation, so as to cover the variable damper D 1, D 2, D 3 outside-air intake of the amount that has been released to the outside air from the discharge duct 41 by operating the duct 14, air circulation Fresh air in the system. この場合,既述したように,還気ダクト9を流れる空気の温度は,40℃程度であるから,夏期であっても,これを放出ダクト41を通じて外気にそのまま放出し,相応量の外気をダクト14を通じて取り入れる。 In this case, as described above, the temperature of the air flowing through the return air duct 9, since it is about 40 ° C., even in summer, which is directly released into the outside air through the discharge duct 41, outside air corresponding amount adopt through the duct 14. このように冬期のみならず,中間時においても,さらに夏期においても外気利用の冷房運転が実施でき,外気冷房効果が大きく,しかもその適用期間が長い冷房運転を実施することが可能である。 Thus not winter but also in the intermediate time, further also implemented cooling operation of the outside air used in the summer, large outdoor air cooling effect, yet it is possible that the application period is to implement a long cooling operation.

【0027】前記第1の実施の形態では,空調装置3において処理空気を一次冷却する際に,冷却塔31からの冷却水との間で熱交換する冷却コイル11を使用していたが,これに代えて,図3に示したシステムを利用する第3の実施の形態のように,ヒートパイプ51を具備した冷却塔52において,当該ヒートパイプ51によって冷却するようにしてもよい。 [0027] In the first embodiment, when the primary cooling process air in the air conditioner 3, but was using the cooling coil 11 for heat exchange with the cooling water from the cooling tower 31, which instead of, as in the third embodiment using the system shown in FIG. 3, the cooling tower 52 provided with the heat pipe 51 may be cooled by the heat pipe 51.

【0028】すなわち,冷却塔52は,その内部に仕切壁53によって仕切られた処理空間54と,冷却部としての冷却空間55とを有し,ヒートパイプ51は,これら処理空間54と冷却空間55との間にまたがって配置されている。 [0028] That is, the cooling tower 52 includes a processing space 54 partitioned by the partition wall 53 therein, and a cooling space 55 as a cooling unit, a heat pipe 51, these processing space 54 the cooling space 55 It is disposed across between. 冷却空間55では,ポンプ56によって循環する冷却水がヒートパイプ51の上部に噴霧され,処理空間54での対象処理空気を冷却してヒートパイプ5 In the cooling space 55, the cooling water circulating by the pump 56 is sprayed into the upper portion of the heat pipe 51, heat pipe 5 to cool the target process air in a processing space 54
1内で蒸発した冷媒を,外気空気と噴霧水の気化潜熱によって冷却して再び凝縮させる構成を有している。 The evaporated refrigerant in the 1, has a structure which recondensed by cooling by latent heat of vaporization of the outside air the air and water spray.

【0029】そして還気ダクト9を通じて送られてきた高温の還気は,この冷却塔52の処理空間54内でヒートパイプ51と接触して冷却され,その後ダクト57を通じて空調装置3へと導入され,冷却コイル12によって二次冷却されるようになっている。 [0029] The high temperature which is sent through the return air duct 9 return air, the contact with the heat pipes 51 are cooled in the processing space 54 of the cooling tower 52 is introduced into the air conditioner 3 through the subsequent duct 57 It is adapted to be a secondary cooling by the cooling coil 12.

【0030】このように,還気ダクト9からの高温の還気(排気)を冷却塔52の処理空間54内でヒートパイプ51で一次冷却すれば,冷却コイル12に供給する冷媒が担う負荷を低減させることができる。 [0030] Thus, if hot return air (exhaust) cooled primary a heat pipe 51 in the processing space 54 of the cooling tower 52 from the return air duct 9, the load carrying refrigerant supplied to the cooling coil 12 it can be reduced. したがって, Therefore,
それら冷媒を供給する冷凍機を小型化したり,運転時間の短縮や冷却器での不足分のみの冷却により,運転コストを下げることが可能である。 Or miniaturized refrigerator to supply them refrigerant, the cooling of the shortage only in shortening cooler operating time, it is possible to lower the operating costs.

【0031】またかかる場合でも,図4に示したシステムを利用した第4の実施の形態のように,還気を外気中に放出する放出ダクト41を空気循環系に設けて,積極的に屋外に排気を放出した分,外気取り入れダクト14 [0031] or even take, as in the fourth embodiment utilizing the system shown in FIG. 4, a discharge duct 41 for releasing the return air to the outside air is provided in the air circulation system, actively outdoors amount corresponding to the release of the exhaust to the outside air intake duct 14
から外気を取り入れるようにしてもよい。 It may be taking in the outside air from.

【0032】すなわち,還気ダクト9の途中に分岐した放出ダクト41を設け,当該放出ダクト41に可変ダンパD ,分岐部から下流の還気ダクト9に可変ダンパD [0032] That is, the discharge duct 41 which branches on the way of the return air duct 9 provided, the variable damper D 1 to the discharge duct 41, the variable damper D from the branch portion downstream of the return air duct 9
,空調装置3へ外気を取り入れるための外気取り入れダクト14に可変ダンパD を設け,必要に応じて,可変ダンパD ,D ,D を操作すると共に,送風機4 2, the variable damper D 3 provided in the outside air intake duct 14 for drawing outside air to the air conditioner 3, optionally with operating the variable damper D 1, D 2, D 3, blower 4
2を作動させ,還気ダクト9からの還気の一部をそのまま放出ダクト41から外気中に放出する。 2 is operated and released from it the discharge duct 41 a portion of return air from the return air duct 9 to the outside air. 一方放出した分は,外気取り入れダクト14から空調装置3内に導入する。 Meanwhile emission was minute, is introduced from the outside air intake duct 14 to the air conditioning apparatus 3. かかる冷房運転によれば,先に示した第2の実施の形態と同様,夏期を含めて,そのように常時循環系に外気を取り入れて外気を利用した冷房運転が可能となる。 According to such a cooling operation, as in the second embodiment shown above, including the summer, it is possible to cooling operation using the outside air introduced external air into so constantly circulatory system.

【0033】 [0033]

【発明の効果】本発明によれば,特に高密度,高負荷電算機室の冷房を空気循環方式で冷房するにあたり,従来よりも少ない風量でこれを実施することができる。 According to the present invention, in particular high density, a cooling high-load computer room Upon cools air circulation method, it is possible to do this with less air volume than conventional. したがってそれに伴って必要な設備も小型化することが可能である。 Therefore necessary facilities with it also can be miniaturized. また特に請求項3の場合には,四季を通じて外気を有効に利用することができ,また請求項4,5の場合には,冷凍機冷水,冷媒の使用量を減少させたり,冷凍機を小型のもので運転できる。 Particularly in the case of claim 3 also can be used effectively outside air throughout the year, in the case of claims 4 and 5, the refrigerator cold water, or to reduce the amount of the refrigerant, a small refrigerator It can be operated in one of.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の第1の実施の形態にかかる冷房方法を実施するためのシステムの構成の概略を示した説明図である。 FIG. 1 is an explanatory view showing a schematic configuration of a system for carrying out such cooling method to the first embodiment of the present invention.

【図2】本発明の第2の実施の形態にかかる冷房方法を実施するためのシステムの構成の概略を示した説明図である。 FIG. 2 is an explanatory view showing a schematic configuration of a system for carrying out such cooling method to a second embodiment of the present invention.

【図3】本発明の第3の実施の形態にかかる冷房方法を実施するためのシステムの構成の概略を示した説明図である。 3 is an explanatory view showing a schematic configuration of a system for carrying out such cooling method to the third embodiment of the present invention.

【図4】本発明の第4の実施の形態にかかる冷房方法を実施するためのシステムの構成の概略を示した説明図である。 4 is an explanatory diagram showing an outline of the configuration of a system for implementing the fourth cooling method according to the embodiment of the present invention.

【符号の説明】 DESCRIPTION OF SYMBOLS

1 コンピュータ装置 3 空調装置 4 給気ダクト 9 還気ダクト 11,12 冷却コイル 21 冷凍機 31 冷却塔 1 computer device 3 air conditioner 4 air supply duct 9 the return air ducts 11 and 12 a cooling coil 21 refrigerator 31 cooling tower

Claims (6)

    【特許請求の範囲】 [The claims]
  1. 【請求項1】 電算機を設置した室に空調装置からの空調空気を供給すると共に,前記室からの還気を前記空調装置に戻して再び処理する冷房空気循環系を有する,電算機室の冷房方法であって,前記空調空気の吹出温度を,前記電算機の耐用温度よりも15℃〜25℃低い温度に設定すると共に前記空調空気の吹出し風速を低速に設定して前記室の下方から前記室内に吹き出させ,さらに前記室の天井部付近から還気をとることを特徴とする,電算機室の冷房方法。 With 1. A supplying conditioned air from the air conditioner to the chamber were installed computerized machine, the return air from the chamber having a cooling air circulation system for re-processing is returned to the air conditioning system, the computer room a cooling method, the outlet temperature of the conditioned air from below of the set of blowing wind speed of the conditioned air in the low-speed chamber and sets to 15 ° C. to 25 ° C. lower temperature than the service temperature of the computerized machine the blown into the room, further characterized in that to take return air from the ceiling portion around the chamber, cooling method of the computer room.
  2. 【請求項2】 電算機を設置した室に空調装置からの空調空気を供給すると共に,前記室からの還気を前記空調装置に戻して再び処理する冷房空気循環系を有する,電算機室の冷房方法であって,前記室へ空調空気を供給する給気ダクトの出口温度と,前記室の天井部付近の滞留空気を排出する還気ダクトの入口温度との温度差が,1 2. A supplies the conditioned air from the air conditioner to the chamber were installed computerized machine, the return air from the chamber having a cooling air circulation system for re-processing is returned to the air conditioning system, the computer room a cooling method, and the outlet temperature of the air supply duct for supplying conditioned air into the chamber, the temperature difference between the inlet temperature of the return air duct for discharging the accumulated air in the vicinity of the chamber of the ceiling portion, 1
    5℃〜25℃となるように,前記空調空気の吹出温度を調整することを特徴とする,電算機室の冷房方法。 5 ° C. so as to to 25 ° C., and adjusting the outlet temperature of the conditioned air, cooling method of the computer room.
  3. 【請求項3】 夏期の昼間時を除き,前記冷房空気循環系に,法規で定められた汚染物質の許容濃度を達成するために必要な外気導入量を越える外気を取り入れることを特徴とする,請求項1又は2に記載の電算機室の冷房方法。 3. Except for the daytime in summer, the cooling air circulation system, and wherein the drawing outside air in excess of the outside air introduction amount necessary to achieve an acceptable contaminant concentration prescribed by law, cooling method computer room according to claim 1 or 2.
  4. 【請求項4】 夏期の昼間時に,前記冷房空気循環系に,法規で定められた汚染物質の許容濃度を達成するために必要な外気導入量を越える外気を取り入れることを特徴とする,請求項1又は2に記載の電算機室の冷房方法。 At 4. A summer daytime, the cooling air circulation system, and wherein the drawing outside air in excess of the outside air introduction amount necessary to achieve an acceptable contaminant concentration prescribed by law, claims cooling method computer room according to 1 or 2.
  5. 【請求項5】 前記空調装置は,冷凍機からの冷媒を使用する冷却コイルを有し,前記冷凍機の凝縮器は冷却塔からの冷却水によって冷却される構成を有し,前記冷房空気循環系において,前記室からの還気を,冷却塔からの冷却水を使用して予冷するために設けた冷却器で熱交換した後,前記冷却コイルで処理することを特徴とする,請求項1,2,3又は4のいずれかに記載の電算機室の冷房方法。 Wherein said air conditioning system, a cooling coil that uses the refrigerant from the refrigerator, the condenser of the refrigerator has a structure that is cooled by the cooling water from the cooling tower, the cooling air circulation in the system, the return air from the chamber, after heat exchange with cooler provided for pre-cooling using cooling water from the cooling tower, characterized in that treatment with the cooling coil, claim 1 2, 3 or 4 cooling method of computer room according to any one of.
  6. 【請求項6】 前記冷房空気循環系において,前記室からの還気をヒートパイプの一端に接触させた後に前記空調装置に戻して処理し,前記ヒートパイプの他端は,冷却塔内の冷却部内に配置することを特徴とする,請求項1,2,3又は4のいずれかに記載の電算機室の冷房方法。 6. The cooling air circulation system, the treated back to the air conditioning device after contacting the return air from the chamber to one end of the heat pipe, the other end of the heat pipe, cooling in the cooling tower and wherein placing the portion, the cooling method of the computer room according to one of claims 1, 2, 3 or 4.
JP2000247386A 2000-08-17 2000-08-17 Method for cooling computer room Pending JP2002061911A (en)

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