JP4079576B2

JP4079576B2 - Absorption refrigerator

Info

Publication number: JP4079576B2
Application number: JP2000167496A
Authority: JP
Inventors: 俊之星野; 正之大能; 伸一上篭
Original assignee: Sanyo Electric Co Ltd
Current assignee: Sanyo Electric Co Ltd
Priority date: 2000-06-05
Filing date: 2000-06-05
Publication date: 2008-04-23
Anticipated expiration: 2020-06-05
Also published as: JP2001349631A

Description

【０００１】
【発明の属する技術分野】
本発明は、コージェネレーション装置などから供給される排熱を利用して成績係数を改善するようにした吸収冷凍機に係わるものである。
【０００２】
【従来の技術】
この種の吸収冷凍機として、例えばガスバーナなどの燃焼加熱手段１Ａにより吸収液を加熱して冷媒を蒸発分離する高温再生器１、高温再生器１から供給される冷媒蒸気を熱源として吸収液を加熱し冷媒を蒸発分離する低温再生器２、それに併設され、低温再生器２から供給される冷媒蒸気を凝縮する凝縮器３、冷媒液を蒸発させて冷水を得る蒸発器４、蒸発器４で蒸発した冷媒を吸収液に吸収させる吸収器５、図示しないコージェネレーション装置などから排熱供給管１１を介して供給される温排水を熱源として吸収液を加熱し冷媒を蒸発分離する排熱再生器５、それに併設され、排熱再生器６から供給される冷媒蒸気を凝縮する排熱凝縮器７、吸収液ポンプＰ１、Ｐ２、冷媒ポンプＰ３などを備えた図６に示す構成の吸収冷凍機が周知である。
【０００３】
また、図７に示したように、低温再生器２と排熱再生器６とが凝縮器３を共有するように並設された吸収冷凍機も周知である。
【０００４】
【発明が解決しようとする課題】
図６に示した構成の吸収冷凍機においては、広い設置スペースが必要となる、配管が複雑になる、と云った問題点があり、図７に示した構成の吸収冷凍機においては、濃度の異なる吸収液を同じ胴内に保有するため冷媒ロスが発生する、機内配管が複雑になる、と云った問題点があり、他の設備から供給される排熱を利用して成績係数を改善しながらも、構成が複雑にならない吸収冷凍機を提供する必要があった。
【０００５】
【課題を解決するための手段】
本発明は上記従来技術の課題を解決するための具体的手段として、冷媒を多量に吸収した稀吸収液を加熱して冷媒を蒸発分離し、稀吸収液から冷媒蒸気と中間吸収液を得る高温再生器と、この高温再生器で生成して供給される中間吸収液を高温再生器で生成した冷媒蒸気で加熱してさらに冷媒を蒸発分離し、中間吸収液から冷媒蒸気と濃吸収液を得る低温再生器と、この低温再生器で中間吸収液を加熱して凝縮した冷媒液が供給されると共に、低温再生器で生成されエリミネータを通って供給される冷媒蒸気を冷却して冷媒液を得る凝縮器と、この凝縮器から供給されて冷媒液溜まりに溜まった冷媒液が冷媒ポンプにより伝熱管の上に散布され、伝熱管内を流れる流体から熱を奪って冷媒が蒸発する蒸発器と、この蒸発器で生成して供給される冷媒蒸気を低温再生器から冷媒蒸気を分離して供給される濃吸収液に吸収させて稀吸収液にし、高温再生器に供給する吸収器とを備え、外部から供給される排熱熱流体が内側を流れる排熱伝熱管を低温再生器の内部に一体の管群として設け、中間吸収液を散布させる吸収冷凍機において、前記低温再生器の内部には、前記排熱伝熱管と前記高温再生器から供給される冷媒蒸気が内側に流れる冷媒伝熱管とが、前記排熱伝熱管が前記エリミネータ側に配置されその反対側に前記冷媒伝熱管が配置されるように横並びに設置された第１構成の吸収冷凍機と、
【０００６】
冷媒を多量に吸収した稀吸収液を加熱して冷媒を蒸発分離し、稀吸収液から冷媒蒸気と中間吸収液を得る高温再生器と、高温再生器で生成した冷媒蒸気で吸収液を加熱して冷媒を蒸発分離する低温再生器と、この低温再生器で吸収液を加熱して凝縮した冷媒液が供給されると共に、低温再生器で生成されエリミネータを通って供給される冷媒蒸気を冷却して冷媒液を得る凝縮器と、この凝縮器から供給されて冷媒液溜まりに溜まった冷媒液が冷媒ポンプにより伝熱管の上に散布され、伝熱管内を流れる流体から熱を奪って冷媒が蒸発する蒸発器と、この蒸発器で生成して供給される冷媒蒸気を低温再生器から冷媒蒸気を分離して供給される濃吸収液に吸収させて稀吸収液にする吸収器とを備え、外部から供給される排熱熱流体が内側を流れる排熱伝熱管を低温再生器の内部に一体の管群として設け、稀吸収液を散布させる吸収冷凍機において、前記低温再生器の内部には、前記排熱伝熱管と前記高温再生器から供給される冷媒蒸気が内側に流れる冷媒伝熱管とが、前記排熱伝熱管が前記エリミネータ側に配置されその反対側に前記冷媒伝熱管が配置されるように横並びに設置され、前記吸収器で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液が、前記高温再生器と前記低温再生器に分岐して供給され、前記高温再生器で冷媒を蒸発分離して濃縮された吸収液と、前記低温再生器で冷媒を蒸発分離して濃縮された吸収液とが、前記吸収器に戻されるように吸収液管を配管した第２構成の吸収冷凍機と、
【０００７】
冷媒を多量に吸収した稀吸収液を加熱して冷媒を蒸発分離し、稀吸収液から冷媒蒸気と中間吸収液を得る高温再生器と、高温再生器で生成した冷媒蒸気で吸収液を加熱して冷媒を蒸発分離する低温再生器と、この低温再生器で吸収液を加熱して凝縮しこの高温再生器で生成して供給される中間吸収液を高温再生器で生成した冷媒蒸気で加熱してさらに冷媒を蒸発分離し、中間吸収液から冷媒蒸気と濃吸収液を得る低温再生器と、この低温再生器で中間吸収液を加熱して凝縮した冷媒液が供給されると共に、低温再生器で生成されエリミネータを通って供給される冷媒蒸気を冷却して冷媒液を得る凝縮器と、この凝縮器から供給されて冷媒液溜まりに溜まった冷媒液が冷媒ポンプにより伝熱管の上に散布され、伝熱管内を流れる流体から熱を奪って冷媒が蒸発する蒸発器と、この蒸発器で生成して供給される冷媒蒸気を高温再生器から供給される吸収液に吸収させて稀吸収液にする吸収器とを備え、外部から供給される排熱熱流体が内側を流れる排熱伝熱管を低温再生器の内部に一体の管群として設け、稀吸収液を散布させる吸収冷凍機において、前記低温再生器の内部には、前記排熱伝熱管と前記高温再生器から供給される冷媒蒸気が内側に流れる冷媒伝熱管とが、前記排熱伝熱管が前記エリミネータ側に配置されその反対側に前記冷媒伝熱管が配置されるように横並びに設置され、前記吸収器で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液が、先ず前記低温再生器に供給され、前記低温再生器で冷媒を蒸発分離して濃縮された吸収液が前記高温再生器に供給され、前記高温再生器でさらに冷媒を蒸発分離して濃縮された吸収液が前記高温再生器から前記吸収器に戻されるように吸収液管を配管した第３構成の吸収冷凍機と、
を提供することにより、前記した従来技術の課題を解決するものである。
【０００８】
【発明の実施の形態】
〔第１の実施形態〕
以下、本発明の第１の実施形態を図１と図２に基づいて詳細に説明する。なお、理解を容易にするため、これらの図においても前記図６、図７において説明した部分と同様の機能を有する部分には、同一の符号を付した。
【０００９】
本発明の吸収冷凍機の低温再生器２には、高温再生器１で生成し、冷媒管１４を介して供給される冷媒蒸気が内側を流れる冷媒伝熱管１４Ａと共に、例えば排熱供給管１１を介して図示しないコージェネレーション装置のエンジン発電機を冷却して循環供給される８８℃程度に加熱されたエンジン冷却水が内側を流れる排熱伝熱管１１Ａが配管され、高温再生器１から吸収液管１５を介して供給され、上方から散布される中間吸収液を加熱して冷媒を蒸発分離し、吸収液を濃縮するようになっている。
【００１０】
そして、この第１の実施形態の吸収冷凍機では、低温再生器２の内部に配管される排熱伝熱管１１Ａと冷媒伝熱管１４Ａは、図２に示したように排熱伝熱管１１Ａが冷媒伝熱管１４Ａの上に位置するように配置され、その排熱伝熱管１１Ａの上に高温熱交換器９を経由して高温再生器１から供給される中間吸収液が散布されるようになっている。
【００１１】
したがって、この第１の実施形態の吸収冷凍機においては、冷却水管１２に冷却水を流し、排熱供給管１１を介して低温再生器２内の排熱伝熱管１１Ａに約８０℃のエンジン冷却水を循環供給すると共に、ガスバーナなどの燃焼加熱手段１Ａに点火して高温再生器１で吸収液を加熱すると、高温再生器１においては吸収液から蒸発分離した冷媒蒸気と、冷媒蒸気を分離して吸収液の濃度が高くなった中間吸収液とが得られる。
【００１２】
高温再生器１で生成された高温、例えば９０℃の冷媒蒸気は、冷媒管１４を介して低温再生器２に入り、排熱供給管１１を介して排熱伝熱管１１Ａに循環供給されるエンジン冷却水と共同して、高温再生器１で生成され吸収液管１５により高温熱交換器９を経由して低温再生器２に入った中間吸収液を各伝熱管の管壁を介して加熱し、放熱凝縮して凝縮器３に入る。
【００１３】
低温再生器２で排熱伝熱管１１Ａの内側を流れるエンジン冷却水と冷媒伝熱管１４Ａの内側を流れる冷媒蒸気により加熱されて中間吸収液から蒸発分離した冷媒はエリミネータ２０を通って凝縮器３へ入り、冷却水管１２内を流れる水と熱交換して凝縮液化し、１４Ａで凝縮して供給される冷媒と一緒になって冷媒管１４を通って蒸発器４に入る。
【００１４】
蒸発器４に入って冷媒液溜まりに溜まった冷媒液は、冷水管１３に接続された冷水伝熱管１３Ａの上に冷媒ポンプＰ３によって散布され、冷水管１３を介して供給される水と熱交換して蒸発し、冷水伝熱管１３Ａの内部を流れる水を冷却する。
【００１５】
蒸発器４で蒸発した冷媒は、蒸発器４に併設された吸収器５に入り、低温再生器２で加熱されて冷媒を蒸発分離し、吸収液の濃度が一層高まった吸収液、すなわち吸収液管１５により低温熱交換器８を経由して供給され、上方から散布される濃吸収液に吸収される。この吸収液による冷媒の吸収作用により、蒸発器４における冷媒の蒸発作用が促進される。
【００１６】
吸収器５で冷媒を吸収して濃度の薄くなった吸収液、すなわち稀吸収液は吸収液ポンプＰ１の運転により、低温熱交換器８・高温熱交換器９を経由して高温再生器１へ吸収液管１５から送られる。
【００１７】
上記のように吸収冷凍機の運転が行われると、蒸発器４の内部に配管された冷水伝熱管１３Ａにおいて冷媒の気化熱によって冷却された冷水が、冷水管１３を介して図示しない冷却負荷に循環供給できるので、冷房運転などが行える。
【００１８】
そして、本発明の第１の実施形態の吸収冷凍機においては、排熱供給管１１を介して供給されるエンジン冷却水が内側を流れる排熱伝熱管１１Ａと、冷媒管１４を介して供給される冷媒蒸気が内側を流れる冷媒伝熱管１４Ａとを、低温再生器２の内部に上下に配置する一体構造としたので、機内配管が簡略化され、且つ、装置のコンパクト化も図れ、これにより製造コストの削減が可能となった。
【００１９】
また、排熱伝熱管１１Ａと、冷媒伝熱管１４Ａとを同じ胴内に配置する構成であるが、同じ吸収液を加熱する構成となっているので、飽和温度より温度が低い吸収液が散布されても冷媒ロスは発生しない。
【００２０】
しかも、上側に配置した排熱伝熱管１１Ａに相対的に温度の低いエンジン冷却水を流し、下に配置した冷媒伝熱管１４Ａに相対的に温度の高い冷媒を流し、排熱伝熱管１１Ａに吸収液を散布する構成としたので、温度の低いエンジン冷却水が冷媒を多く含んでいる吸収液を加熱し、冷媒が少なくなった吸収液をより高温の冷媒蒸気によって加熱するので、吸収液に含まれる冷媒の蒸発分離は効果的になされる。
【００２１】
〔第２の実施形態〕
本発明の第２の実施形態を図３に基づいて説明する。理解を容易にするため、この図３においても前記図面で説明した部分と同様の機能を有する部分には、同一の符号を付した。
【００２２】
この第２の実施形態の吸収冷凍機においては、約８８℃のエンジン冷却水が供給される排熱伝熱管１１Ａが凝縮器３、すなわちエリミネータ２０の側に、約９０℃の冷媒蒸気が供給される冷媒伝熱管１４Ａがその反対側に位置するように横並びに配設されており、その他の構成は前記第１の実施形態の吸収冷凍機と同じである。
【００２３】
上記構成の吸収冷凍機においても、低温再生器２の内部に排熱伝熱管１１Ａと冷媒伝熱管１４Ａとを配置した一体構造となっているので、機内配管が簡略化され、且つ、装置のコンパクト化と製造コストの削減が図れる。
【００２４】
なお、この第２の実施形態の吸収冷凍機においては、吸収液の濃度差を利用したエンジン冷却水による冷媒の蒸発分離作用を促進する作用効果は期待できないが、機器配置上でメリットがある場合に有効であり、排熱伝熱管１１Ａと冷媒伝熱管１４Ａとをこのように横並びに配置する場合は、排熱伝熱管１１Ａを凝縮器３の側に配置する方が、冷媒蒸気流による圧損を受け難く有利である。
【００２５】
なお、本発明は上記実施形態に限定されるものではないので、特許請求の範囲に記載の趣旨から逸脱しない範囲で各種の変形実施が可能である。
【００２６】
例えば、図４に示したように、吸収器５で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液が、高温再生器１と低温再生器２に分岐して供給され、高温再生器１で冷媒を蒸発分離して濃縮された吸収液と、低温再生器２で冷媒を蒸発分離して濃縮された吸収液とが吸収器５に戻されるように吸収液管１５を配管しても良い。
【００２７】
また、図５に示したように、吸収器５で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液が、先ず低温再生器２に供給され、低温再生器２で冷媒を蒸発分離して濃縮された吸収液が高温再生器１に供給され、高温再生器１でさらに冷媒を蒸発分離して濃縮された吸収液が高温再生器１から吸収器５に戻されるように吸収液管１５を配管しても良い。
【００２８】
そして、図４、図５に示したように、吸収器５で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液の一部または全部を低温再生器２に供給するように吸収液管１５を配管した吸収冷凍機においては、高温再生器１で冷媒を蒸発分離して濃縮された中間吸収液を低温再生器２に供給する図１に示した第１の実施形態の吸収冷凍機よりも、排熱供給管１１を介して温度が比較的低いエンジン冷却水などを排熱伝熱管１１Ａに供給して行う、低温再生器２における冷媒の蒸発分離操作が一層効果的に行えると云った利点がある（排熱伝熱管１１Ａと冷媒伝熱管１４Ａとは、図３に示した配置関係であっても良い）。
【００２９】
また、高温再生器１で吸収液を加熱して冷媒を蒸発分離する熱源としては、１５０〜１９０℃程度の高温水、４００〜８００ｋＰａ程度の飽和蒸気などであっても良いし、排熱供給管１１を介して低温再生器２に供給する熱流体としては、８５〜９５℃程度の低温水、１００〜１３０℃程度の高温水、１００〜１５０ｋＰａ程度の飽和蒸気であっても良い。
【００３０】
【発明の効果】
以上説明したように本発明によれば、コージェネレーション装置などの他の装置から供給される排熱を搬送する熱流体が内側を流れる排熱伝熱管と、高温再生器で生成した冷媒蒸気が内側を流れる冷媒伝熱管とを、低温再生器の内部に並設する一体構造としたので、機内配管が簡略化され、且つ、装置のコンパクト化も図れ、これにより製造コストの削減が可能となった。
【００３１】
また、排熱伝熱管と冷媒伝熱管とを同じ胴内に配置する構成であるが、同じ吸収液を加熱する構成となっているので、飽和温度より温度が低い吸収液が散布されても冷媒ロスは発生しない。
【００３２】
さらに、請求項２及び請求項３の構成によって、吸収器で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液の一部または全部を低温再生器に供給するように吸収液管を配管した吸収冷凍機においては、高温再生器で冷媒を蒸発分離して濃縮された中間吸収液を低温再生器に供給する吸収冷凍機よりも、排熱供給管を介して温度が比較的低いエンジン冷却水などを排熱伝熱管に供給して行うところの、低温再生器における冷媒の蒸発分離操作が一層効果的に行えると云った利点がある。
【図面の簡単な説明】
【図１】第１の実施形態を示す説明図である。
【図２】第１の実施形態の要部を示す説明図である。
【図３】第２の実施形態の要部を示す説明図である。
【図４】実施可能な他の例を示す説明図である。
【図５】実施可能なさらに他の例を示す説明図である。
【図６】従来技術を示す説明図である。
【図７】他の従来技術を示す説明図である。
【符号の説明】
１高温再生器
２低温再生器
３凝縮器
４蒸発器
５吸収器
６排熱再生器
７排熱凝縮器
８低温熱交換器
９高温熱交換器
１１排熱供給管
１１Ａ排熱伝熱管
１２冷却水管
１３冷水管
１４冷媒管
１４Ａ冷媒伝熱管
１５吸収液管
１６冷水管
２０エリミネータ
Ｐ１吸収液ポンプ
Ｐ２冷媒ポンプ
Ｐ３吸収液ポンプ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an absorption refrigerator that uses a waste heat supplied from a cogeneration apparatus or the like to improve a coefficient of performance.
[0002]
[Prior art]
As this type of absorption refrigerator, for example, a high-temperature regenerator 1 that evaporates and separates refrigerant by heating the absorption liquid by a combustion heating means 1A such as a gas burner, and heats the absorption liquid using refrigerant vapor supplied from the high-temperature regenerator 1 as a heat source. The low-temperature regenerator 2 that evaporates and separates the refrigerant, the condenser 3 that condenses the refrigerant vapor supplied from the low-temperature regenerator 2, the evaporator 4 that evaporates the refrigerant liquid to obtain cold water, and the evaporator 4 evaporates. An absorber 5 that absorbs the absorbed refrigerant into the absorbing liquid, and an exhaust heat regenerator 5 that evaporates and separates the refrigerant by heating the absorbing liquid by using hot wastewater supplied from a cogeneration device (not shown) through the exhaust heat supply pipe 11 as a heat source. An absorption refrigerating machine having the configuration shown in FIG. 6, which includes an exhaust heat condenser 7 that condenses refrigerant vapor supplied from the exhaust heat regenerator 6, an absorption liquid pump P 1, P 2, a refrigerant pump P 3, etc., is well known. so That.
[0003]
Further, as shown in FIG. 7, an absorption refrigerator in which the low-temperature regenerator 2 and the exhaust heat regenerator 6 are arranged side by side so as to share the condenser 3 is also well known.
[0004]
[Problems to be solved by the invention]
The absorption refrigerator having the configuration shown in FIG. 6 has problems such as requiring a large installation space and complicated piping. In the absorption refrigerator having the configuration shown in FIG. There are problems such as refrigerant loss occurring because different absorbents are held in the same cylinder, and in-machine piping becomes complicated, and the coefficient of performance is improved by using exhaust heat supplied from other equipment. However, it is necessary to provide an absorption refrigerator that does not have a complicated configuration.
[0005]
[Means for Solving the Problems]
The present invention is a specific means for solving the above-described problems of the prior art, by heating a rare absorbent that absorbs a large amount of refrigerant, evaporating and separating the refrigerant, and obtaining a refrigerant vapor and an intermediate absorbent from the rare absorbent. The regenerator and the intermediate absorbing liquid generated and supplied by the high temperature regenerator are heated with the refrigerant vapor generated by the high temperature regenerator to further evaporate and separate the refrigerant, thereby obtaining the refrigerant vapor and the concentrated absorbing liquid from the intermediate absorbing liquid. A low-temperature regenerator and a refrigerant liquid obtained by heating and condensing the intermediate absorption liquid in the low-temperature regenerator are supplied, and the refrigerant vapor generated in the low-temperature regenerator and supplied through the eliminator is cooled to obtain a refrigerant liquid A condenser and an evaporator in which the refrigerant liquid supplied from the condenser and accumulated in the refrigerant liquid reservoir is dispersed on the heat transfer pipe by the refrigerant pump, and heat is taken from the fluid flowing in the heat transfer pipe to evaporate the refrigerant; Produced and supplied by this evaporator The refrigerant vapor is separated from the low-temperature regenerator and absorbed into the concentrated absorbent supplied to make a rare absorbent, and the absorber is supplied to the high-temperature regenerator. In the absorption chiller in which the exhaust heat transfer tube flowing inside is provided as an integral tube group inside the low temperature regenerator and the intermediate absorption liquid is sprayed , the exhaust heat transfer tube and the high temperature regeneration are provided inside the low temperature regenerator. A refrigerant heat transfer tube in which refrigerant vapor supplied from the vessel flows inward is disposed side by side so that the exhaust heat transfer tube is disposed on the eliminator side and the refrigerant heat transfer tube is disposed on the opposite side . An absorption refrigerator with a configuration;
[0006]
The high-temperature regenerator that heats the rare absorbent that has absorbed a large amount of refrigerant to evaporate and separate the refrigerant, obtains the refrigerant vapor and the intermediate absorbent from the rare absorbent, and heats the absorbent with the refrigerant vapor generated by the high-temperature regenerator. The low-temperature regenerator for evaporating and separating the refrigerant and the refrigerant liquid condensed by heating the absorption liquid with this low-temperature regenerator are supplied, and the refrigerant vapor generated by the low-temperature regenerator and supplied through the eliminator is cooled. The condenser that obtains the refrigerant liquid and the refrigerant liquid that has been supplied from the condenser and accumulated in the refrigerant liquid reservoir are scattered on the heat transfer pipe by the refrigerant pump, and the refrigerant evaporates by taking heat from the fluid flowing in the heat transfer pipe. And an absorber that absorbs the refrigerant vapor generated and supplied by the evaporator from the low-temperature regenerator and absorbs the refrigerant vapor into the concentrated absorbent supplied to form a rare absorbent. Waste heat heat fluid supplied from the inside flows In the absorption chiller in which the heat transfer tube is provided as an integral tube group inside the low temperature regenerator and the rare absorption liquid is sprayed, the low temperature regenerator is supplied from the exhaust heat transfer tube and the high temperature regenerator. refrigerant vapor and a refrigerant heat transfer tube flows inside that, the refrigerant heat exchanger tube is disposed side by side so as to be disposed in the waste heat heat exchanger tube is disposed in the eliminator side opposite side, the refrigerant vapor in the absorber A rare absorption liquid having a reduced absorption liquid concentration by being absorbed and supplied to the high temperature regenerator and the low temperature regenerator, the absorption liquid concentrated by evaporating and separating the refrigerant in the high temperature regenerator, An absorption refrigerator having a second configuration in which an absorption liquid pipe is piped so that the absorption liquid concentrated by evaporating and separating the refrigerant in a low-temperature regenerator is returned to the absorber;
[0007]
The high-temperature regenerator that heats the rare absorbent that has absorbed a large amount of refrigerant to evaporate and separate the refrigerant, obtains the refrigerant vapor and the intermediate absorbent from the rare absorbent, and heats the absorbent with the refrigerant vapor generated by the high-temperature regenerator. The low-temperature regenerator that evaporates and separates the refrigerant and the intermediate absorption liquid that is generated and supplied by the high-temperature regenerator is heated with the refrigerant vapor generated by the high-temperature regenerator. The refrigerant is further separated by evaporating to obtain refrigerant vapor and concentrated absorbent from the intermediate absorption liquid, and the refrigerant liquid condensed by heating the intermediate absorption liquid in the low temperature regenerator is supplied, and the low temperature regenerator The condenser that cools the refrigerant vapor generated and supplied through the eliminator to obtain the refrigerant liquid, and the refrigerant liquid that is supplied from the condenser and accumulated in the refrigerant liquid reservoir is scattered on the heat transfer tube by the refrigerant pump. Heat from the fluid flowing in the heat transfer tube An evaporator that evaporates the refrigerant, and an absorber that absorbs the refrigerant vapor generated and supplied by the evaporator into the absorbing liquid supplied from the high-temperature regenerator to form a rare absorbing liquid. In an absorption chiller in which a waste heat transfer pipe in which a waste heat heat fluid flows inside is provided as an integral tube group inside the low temperature regenerator and sprays a rare absorbent, the exhaust heat is disposed inside the low temperature regenerator. A heat transfer tube and a refrigerant heat transfer tube through which refrigerant vapor supplied from the high-temperature regenerator flows are arranged side by side so that the exhaust heat transfer tube is disposed on the eliminator side and the refrigerant heat transfer tube is disposed on the opposite side. A rare absorbing liquid which is installed in the absorber and has absorbed refrigerant vapor in the absorber to reduce the concentration of the absorbing liquid is first supplied to the low temperature regenerator, and is concentrated by evaporating and separating the refrigerant in the low temperature regenerator. Is supplied to the high temperature regenerator and the high temperature A third configuration of the absorption refrigerator of the absorption liquid which is concentrated further refrigerant raw instrument evaporated off to has piping absorption liquid pipe so returned to the absorber from the high temperature generator,
By providing the above, the above-described problems of the prior art are solved.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
[First Embodiment]
Hereinafter, a first embodiment of the present invention will be described in detail with reference to FIGS. 1 and 2. In order to facilitate understanding, in these drawings, parts having the same functions as those described in FIGS. 6 and 7 are denoted by the same reference numerals.
[0009]
The low-temperature regenerator 2 of the absorption refrigerator according to the present invention includes, for example, an exhaust heat supply pipe 11 together with a refrigerant heat transfer pipe 14A generated by the high-temperature regenerator 1 and supplied through the refrigerant pipe 14 along with the refrigerant heat transfer pipe 14A. An exhaust heat transfer pipe 11A in which engine cooling water heated to about 88 ° C., which is circulated and supplied by cooling an engine generator of a cogeneration apparatus (not shown), flows through the inside, and is piped from the high-temperature regenerator 1 to an absorption liquid pipe. The intermediate absorption liquid supplied through 15 and sprayed from above is heated to evaporate and separate the refrigerant, thereby concentrating the absorption liquid.
[0010]
In the absorption refrigerator of the first embodiment, the exhaust heat transfer tube 11A and the refrigerant heat transfer tube 14A piped inside the low temperature regenerator 2 are composed of the exhaust heat transfer tube 11A as shown in FIG. It arrange | positions so that it may be located on the heat exchanger tube 14A, and the intermediate | middle absorption liquid supplied from the high temperature regenerator 1 via the high temperature heat exchanger 9 is spread | dispersed on the waste heat exchanger tube 11A. Yes.
[0011]
Therefore, in the absorption refrigerator of the first embodiment, the cooling water is allowed to flow through the cooling water pipe 12, and the engine heat of about 80 ° C. is supplied to the exhaust heat transfer pipe 11A in the low temperature regenerator 2 via the exhaust heat supply pipe 11. When water is circulated and the combustion heating means 1A such as a gas burner is ignited and the high-temperature regenerator 1 heats the absorption liquid, the high-temperature regenerator 1 separates the refrigerant vapor evaporated from the absorption liquid and the refrigerant vapor. Thus, an intermediate absorption liquid having a high concentration of the absorption liquid is obtained.
[0012]
The high temperature, for example, 90 ° C. refrigerant vapor generated in the high temperature regenerator 1 enters the low temperature regenerator 2 through the refrigerant pipe 14 and is circulated and supplied to the exhaust heat transfer pipe 11A through the exhaust heat supply pipe 11. In cooperation with the cooling water, the intermediate absorption liquid generated in the high-temperature regenerator 1 and entering the low-temperature regenerator 2 via the high-temperature heat exchanger 9 by the absorption liquid pipe 15 is heated through the wall of each heat transfer pipe. The heat is condensed and enters the condenser 3.
[0013]
In the low-temperature regenerator 2, the engine coolant that flows inside the exhaust heat transfer pipe 11 </ b> A and the refrigerant that is heated and evaporated and separated from the intermediate absorption liquid by the refrigerant vapor flowing inside the refrigerant heat transfer pipe 14 </ b> A passes through the eliminator 20 to the condenser 3. It enters into the evaporator 4 through the refrigerant pipe 14 together with the refrigerant supplied by condensing and condensing with the water flowing through the cooling water pipe 12 and condensed in 14A.
[0014]
The refrigerant liquid that has entered the evaporator 4 and accumulated in the refrigerant liquid pool is sprayed by the refrigerant pump P3 on the cold water heat transfer pipe 13A connected to the cold water pipe 13, and exchanges heat with water supplied through the cold water pipe 13. Then, it evaporates and cools the water flowing inside the cold water heat transfer tube 13A.
[0015]
The refrigerant evaporated in the evaporator 4 enters the absorber 5 attached to the evaporator 4 and is heated in the low-temperature regenerator 2 to evaporate and separate the refrigerant. It is supplied via the pipe 15 via the low-temperature heat exchanger 8 and is absorbed by the concentrated absorbent dispersed from above. The refrigerant evaporating action in the evaporator 4 is promoted by the refrigerant absorbing action of the absorbing liquid.
[0016]
Absorbing liquid whose concentration has been reduced by absorbing the refrigerant in the absorber 5, that is, the rare absorbing liquid, is transferred to the high temperature regenerator 1 via the low temperature heat exchanger 8 and the high temperature heat exchanger 9 by the operation of the absorbing liquid pump P 1. It is sent from the absorption liquid tube 15.
[0017]
When the absorption chiller is operated as described above, the chilled water cooled by the heat of vaporization of the refrigerant in the chilled water heat transfer pipe 13A piped inside the evaporator 4 becomes a cooling load (not shown) via the chilled water pipe 13. Since it can be circulated, it can be used for cooling operation.
[0018]
And in the absorption refrigerator of the first embodiment of the present invention, the engine cooling water supplied through the exhaust heat supply pipe 11 is supplied through the exhaust heat transfer pipe 11A flowing inside and the refrigerant pipe 14. The refrigerant heat transfer tube 14A in which the refrigerant vapor flows inside is integrated with the inside of the low-temperature regenerator 2 so that the piping in the machine is simplified and the apparatus can be made compact. Cost reduction has become possible.
[0019]
Further, the exhaust heat transfer tube 11A and the refrigerant heat transfer tube 14A are arranged in the same cylinder, but the same absorption liquid is heated, so that the absorption liquid having a temperature lower than the saturation temperature is dispersed. However, no refrigerant loss occurs.
[0020]
In addition, a relatively low temperature engine coolant flows through the exhaust heat transfer tube 11A disposed on the upper side, a relatively high temperature refrigerant flows through the refrigerant heat transfer tube 14A disposed below, and the exhaust heat transfer tube 11A absorbs the coolant. Since the liquid is sprayed, the low-temperature engine coolant heats the absorption liquid that contains a large amount of refrigerant, and the low-refrigerant absorption liquid is heated by the higher-temperature refrigerant vapor. Evaporation and separation of the refrigerant is effectively performed.
[0021]
[Second Embodiment]
A second embodiment of the present invention will be described with reference to FIG. In order to facilitate understanding, in FIG. 3 as well, parts having the same functions as those explained in the drawings are given the same reference numerals.
[0022]
In the absorption refrigerator of the second embodiment, the exhaust heat transfer tube 11A to which engine cooling water of about 88 ° C. is supplied is supplied with refrigerant vapor of about 90 ° C. to the condenser 3, that is, the eliminator 20 side. The refrigerant heat transfer tubes 14A are arranged side by side so as to be positioned on the opposite side, and the other configurations are the same as those of the absorption refrigerator of the first embodiment.
[0023]
Also in the absorption refrigerator having the above configuration, the exhaust heat transfer tube 11A and the refrigerant heat transfer tube 14A are arranged in the low temperature regenerator 2 so that the in-machine piping is simplified and the apparatus is compact. And manufacturing costs can be reduced.
[0024]
In the absorption refrigerator according to the second embodiment, the effect of promoting the evaporative separation of the refrigerant by the engine cooling water using the concentration difference of the absorbing liquid cannot be expected, but there is a merit in equipment arrangement. In the case where the exhaust heat transfer tube 11A and the refrigerant heat transfer tube 14A are arranged side by side in this manner, the exhaust heat transfer tube 11A is arranged on the condenser 3 side so that the pressure loss due to the refrigerant vapor flow is reduced. It is hard to receive and is advantageous.
[0025]
In addition, since this invention is not limited to the said embodiment, various deformation | transformation implementation is possible in the range which does not deviate from the meaning as described in a claim.
[0026]
For example, as shown in FIG. 4, a rare absorbing liquid whose absorption liquid concentration is reduced by absorbing refrigerant vapor in the absorber 5 is branched and supplied to the high temperature regenerator 1 and the low temperature regenerator 2, and the high temperature regenerator Even if the absorption liquid pipe 15 is piped so that the absorption liquid concentrated by evaporating and separating the refrigerant in 1 and the absorption liquid concentrated by evaporating and separating the refrigerant in the low-temperature regenerator 2 are returned to the absorber 5. good.
[0027]
In addition, as shown in FIG. 5, the rare absorbing liquid whose absorption liquid concentration is reduced by absorbing the refrigerant vapor by the absorber 5 is first supplied to the low temperature regenerator 2, and the refrigerant is evaporated and separated by the low temperature regenerator 2. The concentrated absorption liquid is supplied to the high-temperature regenerator 1, and the absorption liquid pipe 15 is arranged so that the high-pressure regenerator 1 evaporates and separates the refrigerant and returns the concentrated absorption liquid to the absorber 5 from the high-temperature regenerator 1. May be piped.
[0028]
As shown in FIGS. 4 and 5, the absorption liquid pipe is used to supply a part or all of the rare absorbent whose absorption liquid concentration is reduced by absorbing the refrigerant vapor in the absorber 5 to the low temperature regenerator 2. In the absorption refrigerator having the piping 15, the intermediate absorption liquid concentrated by evaporation and separation of the refrigerant in the high temperature regenerator 1 is supplied to the low temperature regenerator 2 from the absorption refrigerator of the first embodiment shown in FIG. In addition, the refrigerant evaporative separation operation in the low-temperature regenerator 2 performed by supplying engine cooling water or the like having a relatively low temperature to the exhaust heat transfer pipe 11A via the exhaust heat supply pipe 11 can be performed more effectively. There is an advantage (the exhaust heat transfer tube 11A and the refrigerant heat transfer tube 14A may have the arrangement relationship shown in FIG. 3).
[0029]
Moreover, as a heat source for heating and absorbing the absorption liquid in the high-temperature regenerator 1, high-temperature water of about 150 to 190 ° C., saturated steam of about 400 to 800 kPa, or the like, or an exhaust heat supply pipe The hot fluid supplied to the low-temperature regenerator 2 via 11 may be low-temperature water of about 85 to 95 ° C., high-temperature water of about 100 to 130 ° C., and saturated steam of about 100 to 150 kPa.
[0030]
【The invention's effect】
As described above, according to the present invention, the exhaust heat transfer tube in which the thermal fluid that transports the exhaust heat supplied from another device such as a cogeneration device flows inside, and the refrigerant vapor generated by the high-temperature regenerator is inside. Since the refrigerant heat transfer tubes that flow through are integrated into the low-temperature regenerator, the piping inside the machine is simplified and the equipment can be made more compact, which makes it possible to reduce manufacturing costs. .
[0031]
Moreover, although it is the structure which arrange | positions a waste heat transfer tube and a refrigerant | coolant heat exchanger tube in the same trunk | drum, since it becomes the structure which heats the same absorption liquid, even if absorption liquid whose temperature is lower than saturation temperature is sprayed, it is a refrigerant | coolant. There is no loss.
[0032]
Further, according to the configuration of claim 2 and claim 3, the absorption liquid pipe is piped so as to supply a part or all of the rare absorbent whose absorption liquid concentration is reduced by absorbing the refrigerant vapor with the absorber to the low temperature regenerator. In the absorption refrigeration machine, the engine cooling, which has a relatively low temperature through the exhaust heat supply pipe, than the absorption chiller that supplies the intermediate absorption liquid concentrated by evaporating and separating the refrigerant in the high temperature regenerator to the low temperature regenerator. There is an advantage that the operation of evaporating and separating the refrigerant in the low-temperature regenerator can be more effectively performed by supplying water or the like to the exhaust heat transfer tube.
[Brief description of the drawings]
FIG. 1 is an explanatory diagram showing a first embodiment.
FIG. 2 is an explanatory diagram showing a main part of the first embodiment.
FIG. 3 is an explanatory diagram showing a main part of a second embodiment.
FIG. 4 is an explanatory diagram showing another example that can be implemented;
FIG. 5 is an explanatory diagram showing still another example that can be implemented;
FIG. 6 is an explanatory diagram showing a conventional technique.
FIG. 7 is an explanatory diagram showing another conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 High temperature regenerator 2 Low temperature regenerator 3 Condenser 4 Evaporator 5 Absorber 6 Exhaust heat regenerator 7 Exhaust heat condenser 8 Low temperature heat exchanger 9 High temperature heat exchanger 11 Exhaust heat supply pipe 11A Exhaust heat transfer pipe 12 Cooling water pipe 13 Cold water pipe 14 Refrigerant pipe 14A Refrigerant heat transfer pipe 15 Absorption liquid pipe 16 Cold water pipe 20 Eliminator P1 Absorption liquid pump P2 Refrigerant pump P3 Absorption liquid pump

Claims

冷媒を多量に吸収した稀吸収液を加熱して冷媒を蒸発分離し、稀吸収液から冷媒蒸気と中間吸収液を得る高温再生器と、この高温再生器で生成して供給される中間吸収液を高温再生器で生成した冷媒蒸気で加熱してさらに冷媒を蒸発分離し、中間吸収液から冷媒蒸気と濃吸収液を得る低温再生器と、この低温再生器で中間吸収液を加熱して凝縮した冷媒液が供給されると共に、低温再生器で生成されエリミネータを通って供給される冷媒蒸気を冷却して冷媒液を得る凝縮器と、この凝縮器から供給されて冷媒液溜まりに溜まった冷媒液が冷媒ポンプにより伝熱管の上に散布され、伝熱管内を流れる流体から熱を奪って冷媒が蒸発する蒸発器と、この蒸発器で生成して供給される冷媒蒸気を低温再生器から冷媒蒸気を分離して供給される濃吸収液に吸収させて稀吸収液にし、高温再生器に供給する吸収器とを備え、外部から供給される排熱熱流体が内側を流れる排熱伝熱管を低温再生器の内部に一体の管群として設け、中間吸収液を散布させる吸収冷凍機において、前記低温再生器の内部には、前記排熱伝熱管と前記高温再生器から供給される冷媒蒸気が内側に流れる冷媒伝熱管とが、前記排熱伝熱管が前記エリミネータ側に配置されその反対側に前記冷媒伝熱管が配置されるように横並びに設置されたことを特徴とする吸収冷凍機。A high-temperature regenerator that heats a rare absorbent that absorbs a large amount of refrigerant to evaporate and separate the refrigerant to obtain refrigerant vapor and an intermediate absorbent from the rare absorbent, and an intermediate absorbent that is generated and supplied by the high-temperature regenerator Is heated with the refrigerant vapor generated in the high-temperature regenerator to further evaporate and separate the refrigerant, and the low-temperature regenerator obtains the refrigerant vapor and the concentrated absorption liquid from the intermediate absorption liquid, and the intermediate absorption liquid is heated and condensed in this low-temperature regenerator And a condenser that cools the refrigerant vapor that is generated by the low-temperature regenerator and that is supplied through the eliminator and obtains the refrigerant liquid, and the refrigerant that is supplied from the condenser and accumulates in the refrigerant liquid reservoir The liquid is sprayed onto the heat transfer tube by the refrigerant pump, the evaporator takes heat from the fluid flowing in the heat transfer tube and the refrigerant evaporates, and the refrigerant vapor generated and supplied by the evaporator is supplied from the low temperature regenerator to the refrigerant Concentrated absorption supplied by separating steam The absorber is supplied as a rare absorbent and supplied to the high-temperature regenerator, and the exhaust heat transfer tubes through which the exhaust heat fluid supplied from outside flows inside are integrated into the low-temperature regenerator as a group of tubes. In the absorption refrigerator that is provided and sprays an intermediate absorption liquid , the exhaust heat transfer tube and the coolant heat transfer tube through which the refrigerant vapor supplied from the high temperature regenerator flows inside are disposed in the low temperature regenerator. An absorption refrigerator , wherein the heat transfer tubes are arranged side by side so that the heat transfer tubes are arranged on the eliminator side and the refrigerant heat transfer tubes are arranged on the opposite side .

冷媒を多量に吸収した稀吸収液を加熱して冷媒を蒸発分離し、稀吸収液から冷媒蒸気と中間吸収液を得る高温再生器と、高温再生器で生成した冷媒蒸気で吸収液を加熱して冷媒を蒸発分離する低温再生器と、この低温再生器で吸収液を加熱して凝縮した冷媒液が供給されると共に、低温再生器で生成されエリミネータを通って供給される冷媒蒸気を冷却して冷媒液を得る凝縮器と、この凝縮器から供給されて冷媒液溜まりに溜まった冷媒液が冷媒ポンプにより伝熱管の上に散布され、伝熱管内を流れる流体から熱を奪って冷媒が蒸発する蒸発器と、この蒸発器で生成して供給される冷媒蒸気を低温再生器から冷媒蒸気を分離して供給される濃吸収液に吸収させて稀吸収液にする吸収器とを備え、外部から供給される排熱熱流体が内側を流れる排熱伝熱管を低温再生器の内部に一体の管群として設け、稀吸収液を散布させる吸収冷凍機において、前記低温再生器の内部には、前記排熱伝熱管と前記高温再生器から供給される冷媒蒸気が内側に流れる冷媒伝熱管とが、前記排熱伝熱管が前記エリミネータ側に配置されその反対側に前記冷媒伝熱管が配置されるように横並びに設置され、前記吸収器で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液が、前記高温再生器と前記低温再生器に分岐して供給され、前記高温再生器で冷媒を蒸発分離して濃縮された吸収液と、前記低温再生器で冷媒を蒸発分離して濃縮された吸収液とが、前記吸収器に戻されるように吸収液管を配管したことを特徴とする吸収冷凍機。 The high-temperature regenerator that heats the rare absorbent that has absorbed a large amount of refrigerant to evaporate and separate the refrigerant, obtains the refrigerant vapor and the intermediate absorbent from the rare absorbent, and heats the absorbent with the refrigerant vapor generated by the high-temperature regenerator. The low-temperature regenerator for evaporating and separating the refrigerant and the refrigerant liquid condensed by heating the absorption liquid with this low-temperature regenerator are supplied, and the refrigerant vapor generated by the low-temperature regenerator and supplied through the eliminator is cooled. The condenser that obtains the refrigerant liquid and the refrigerant liquid that has been supplied from the condenser and accumulated in the refrigerant liquid reservoir are scattered on the heat transfer pipe by the refrigerant pump, and the refrigerant evaporates by taking heat from the fluid flowing in the heat transfer pipe. And an absorber that absorbs the refrigerant vapor generated and supplied by the evaporator from the low-temperature regenerator and absorbs the refrigerant vapor into the concentrated absorbent supplied to form a rare absorbent. Waste heat heat fluid supplied from the inside flows In the absorption chiller in which the heat transfer tube is provided as an integral tube group inside the low temperature regenerator and the rare absorption liquid is sprayed, the low temperature regenerator is supplied from the exhaust heat transfer tube and the high temperature regenerator. refrigerant vapor and a refrigerant heat transfer tube flows inside that, the refrigerant heat exchanger tube is disposed side by side so as to be disposed in the waste heat heat exchanger tube is disposed in the eliminator side opposite side, the refrigerant vapor in the absorber A rare absorption liquid having a reduced absorption liquid concentration by being absorbed and supplied to the high temperature regenerator and the low temperature regenerator, the absorption liquid concentrated by evaporating and separating the refrigerant in the high temperature regenerator, An absorption refrigerator, wherein an absorption liquid pipe is piped so that an absorption liquid concentrated by evaporating and separating a refrigerant in a low-temperature regenerator is returned to the absorber.

冷媒を多量に吸収した稀吸収液を加熱して冷媒を蒸発分離し、稀吸収液から冷媒蒸気と中間吸収液を得る高温再生器と、高温再生器で生成した冷媒蒸気で吸収液を加熱して冷媒を蒸発分離する低温再生器と、この低温再生器で吸収液を加熱して凝縮しこの高温再生器で生成して供給される中間吸収液を高温再生器で生成した冷媒蒸気で加熱してさらに冷媒を蒸発分離し、中間吸収液から冷媒蒸気と濃吸収液を得る低温再生器と、この低温再生器で中間吸収液を加熱して凝縮した冷媒液が供給されると共に、低温再生器で生成されエリミネータを通って供給される冷媒蒸気を冷却して冷媒液を得る凝縮器と、この凝縮器から供給されて冷媒液溜まりに溜まった冷媒液が冷媒ポンプにより伝熱管の上に散布され、伝熱管内を流れる流体から熱を奪って冷媒が蒸発する蒸発器と、この蒸発器で生成して供給される冷媒蒸気を高温再生器から供給される吸収液に吸収させて稀吸収液にする吸収器とを備え、外部から供給される排熱熱流体が内側を流れる排熱伝熱管を低温再生器の内部に一体の管群として設け、稀吸収液を散布させる吸収冷凍機において、前記低温再生器の内部には、前記排熱伝熱管と前記高温再生器から供給される冷媒蒸気が内側に流れる冷媒伝熱管とが、前記排熱伝熱管が前記エリミネータ側に配置されその反対側に前記冷媒伝熱管が配置されるように横並びに設置され、前記吸収器で冷媒蒸気を吸収して吸収液濃度が低下した稀吸収液が、先ず前記低温再生器に供給され、前記低温再生器で冷媒を蒸発分離して濃縮された吸収液が前記高温再生器に供給され、前記高温再生器でさらに冷媒を蒸発分離して濃縮された吸収液が前記高温再生器から前記吸収器に戻されるように吸収液管を配管したことを特徴とする吸収冷凍機。 The high-temperature regenerator that heats the rare absorbent that has absorbed a large amount of refrigerant to evaporate and separate the refrigerant, obtains the refrigerant vapor and the intermediate absorbent from the rare absorbent, and heats the absorbent with the refrigerant vapor generated by the high-temperature regenerator. The low-temperature regenerator that evaporates and separates the refrigerant and the intermediate absorption liquid that is generated and supplied by the high-temperature regenerator is heated with the refrigerant vapor generated by the high-temperature regenerator. The refrigerant is further separated by evaporating to obtain refrigerant vapor and concentrated absorbent from the intermediate absorption liquid, and the refrigerant liquid condensed by heating the intermediate absorption liquid in the low temperature regenerator is supplied, and the low temperature regenerator The condenser that cools the refrigerant vapor generated and supplied through the eliminator and obtains the refrigerant liquid, and the refrigerant liquid supplied from the condenser and accumulated in the refrigerant liquid reservoir is dispersed on the heat transfer tube by the refrigerant pump. Heat from the fluid flowing in the heat transfer tube An evaporator that evaporates the refrigerant, and an absorber that absorbs the refrigerant vapor generated and supplied by the evaporator into the absorbing liquid supplied from the high-temperature regenerator to form a rare absorbing liquid. In an absorption chiller in which a waste heat transfer pipe in which a waste heat heat fluid flows inside is provided as an integral tube group inside the low temperature regenerator and sprays a rare absorbent, the exhaust heat is disposed inside the low temperature regenerator. A heat transfer tube and a refrigerant heat transfer tube through which refrigerant vapor supplied from the high-temperature regenerator flows are arranged side by side so that the exhaust heat transfer tube is disposed on the eliminator side and the refrigerant heat transfer tube is disposed on the opposite side. A rare absorbing liquid which is installed in the absorber and has absorbed refrigerant vapor in the absorber to reduce the concentration of the absorbing liquid is first supplied to the low temperature regenerator, and is concentrated by evaporating and separating the refrigerant in the low temperature regenerator. Is supplied to the high temperature regenerator and the high temperature Absorption refrigerating machine, characterized in that the absorbing liquid enriched refrigerant evaporation separated by a further has a pipe absorption liquid pipe so returned to the absorber from the high temperature generator in the raw device.