JPH11201578A - Operation control method for ammonium absorption refrigerating machine - Google Patents
Operation control method for ammonium absorption refrigerating machineInfo
- Publication number
- JPH11201578A JPH11201578A JP10001942A JP194298A JPH11201578A JP H11201578 A JPH11201578 A JP H11201578A JP 10001942 A JP10001942 A JP 10001942A JP 194298 A JP194298 A JP 194298A JP H11201578 A JPH11201578 A JP H11201578A
- Authority
- JP
- Japan
- Prior art keywords
- ammonia
- liquid
- condenser
- ammonium
- evaporator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/62—Absorption based systems
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、アンモニア吸収式
冷凍機における運転制御方法に関する。[0001] The present invention relates to an operation control method for an ammonia absorption refrigerator.
【０００２】[0002]
【従来の技術】従来、アンモニア吸収式冷凍機は、蒸発
器、吸収器、再生器および精留器からなる再生部、凝縮
器からのアンモニア液を上記精留器に還流させる還流ポ
ンプが設けられた還流管、上記再生部で得られたアンモ
ニア蒸気を凝縮器に移送するアンモニア蒸気移送管に設
けられたアンモニア蒸気温度指示調節計、上記蒸発器で
冷却されたブラインを取り出すブライン取出管に設けら
れたブライン温度指示調節計、上記凝縮器内のアンモニ
ア液量を検出する液面指示調節計、上記再生器に加熱用
蒸気を供給する蒸気供給管に設けられた蒸気量調整弁、
上記凝縮器からのアンモニア液を蒸発器に移送するアン
モニア液移送管に設けられた開閉弁、並びに上記還流管
に設けられた還流量調整弁が具備されるとともに、上記
アンモニア蒸気温度指示調節計により還流管に設けられ
た上記還流量調整弁を制御し、上記ブライン温度指示調
節計により蒸気供給管に設けられた上記蒸気量調整弁を
制御し、上記液面指示調節計によりアンモニア液移送管
に設けられた上記開閉弁を制御するように構成されてい
た。2. Description of the Related Art Conventionally, an ammonia absorption refrigerating machine is provided with a regenerating section comprising an evaporator, an absorber, a regenerator and a rectifier, and a reflux pump for returning an ammonia solution from a condenser to the rectifier. A reflux pipe, an ammonia vapor temperature indicating controller provided in an ammonia vapor transfer pipe for transferring the ammonia vapor obtained in the regeneration section to a condenser, and a brine extraction pipe for taking out the brine cooled in the evaporator. Brine temperature indicating controller, a liquid level indicating controller for detecting the amount of ammonia in the condenser, a steam amount adjusting valve provided on a steam supply pipe for supplying heating steam to the regenerator,
An opening / closing valve provided on an ammonia liquid transfer pipe for transferring the ammonia liquid from the condenser to the evaporator, and a reflux amount adjusting valve provided on the reflux pipe are provided, and the ammonia vapor temperature indicating controller is provided by the ammonia vapor temperature indicating controller. Control the reflux amount adjustment valve provided on the reflux pipe, control the steam amount adjustment valve provided on the steam supply pipe by the brine temperature indicating controller, and control the ammonia liquid transfer pipe by the liquid level indicating controller. It was configured to control the provided on-off valve.
【０００３】上記構成において、通常の負荷時には、蒸
発器でブラインが冷却されるとともに、再生器には蒸気
供給管を介して加熱用蒸気が供給されて、アンモニア水
溶液を作動媒体とする冷凍サイクルが行われ、また蒸発
器での熱効率すなわち冷却効率を向上させるために、凝
縮器から蒸発器に移送されるアンモニア液が過冷却器で
冷却されるとともに、蒸発器に溜まった水分が多く含ま
れたアンモニア液がアンモニア液取出管を介して取り出
され、冷媒再生器にて蒸発されてアンモニア蒸気移送管
に合流されている。[0003] In the above configuration, at the time of normal load, brine is cooled by the evaporator, and heating steam is supplied to the regenerator through a steam supply pipe, and a refrigeration cycle using an aqueous ammonia solution as a working medium is performed. In addition, the ammonia liquid transferred from the condenser to the evaporator was cooled by the supercooler to improve the thermal efficiency, that is, the cooling efficiency in the evaporator, and a large amount of water accumulated in the evaporator was contained. The ammonia liquid is taken out through the ammonia liquid take-out pipe, evaporated by the refrigerant regenerator and joined to the ammonia vapor transfer pipe.
【０００４】そして、低負荷になった際には、再生部に
おけるアンモニアの再生を減らすように制御が行われて
いる。すなわち、蒸発器から出力されるブライン取出管
内のブライン温度が目標温度より低くなると、ブライン
温度指示調節計からの指示により、再生器に供給される
蒸気供給管の途中に介装された蒸気量調整弁により、加
熱用蒸気の供給量が減らされるとともに、凝縮器内のア
ンモニア液量については、常に、所定量に保つように、
液面指示調節計の指示により、開閉弁がＰＩＤ制御され
ている。[0004] When the load becomes low, control is performed to reduce the regeneration of ammonia in the regeneration section. That is, when the brine temperature in the brine discharge pipe output from the evaporator becomes lower than the target temperature, the amount of steam interposed in the middle of the steam supply pipe supplied to the regenerator is controlled by an instruction from the brine temperature indicating controller. By the valve, the supply amount of the heating steam is reduced, and the ammonia liquid amount in the condenser is always maintained at a predetermined amount.
The on / off valve is PID-controlled by the instruction of the liquid level indicating controller.
【０００５】具体的に説明すると、図３に示すように、
高負荷時には、ブラインの出口温度が高くなると［図３
（ａ）参照］、蒸気量調整弁の開度が大きくなり［図３
（ｂ）参照］、したがって凝縮器でのアンモニアの凝縮
量が増加して［図３（ｃ）参照］、アンモニア液移送管
の途中に設けられた開閉弁の開度が大きくなる［図３
（ｄ）参照］ように制御される。More specifically, as shown in FIG.
At high load, when the brine outlet temperature increases [Fig.
(A)], the opening of the steam amount adjusting valve becomes large [FIG.
(B)], the amount of ammonia condensed in the condenser increases [see FIG. 3 (c)], and the opening of an on-off valve provided in the middle of the ammonia liquid transfer pipe increases [FIG.
(D).
【０００６】一方、図４に示すように、低負荷時には、
ブラインの出口温度が低くなって［図４（ａ）参照］、
蒸気量調整弁の開度が小さくなり［図４（ｂ）参照］、
したがって凝縮器でのアンモニアの凝縮量が減少して
［図４（ｃ）参照］、アンモニア液移送管の途中に設け
られた開閉弁の開度が小さくなる［図４（ｄ）参照］よ
うに制御される。On the other hand, as shown in FIG.
The outlet temperature of the brine decreases [see FIG. 4 (a)],
The opening of the steam amount adjusting valve is reduced [see FIG. 4 (b)],
Therefore, the amount of ammonia condensed in the condenser decreases [see FIG. 4 (c)], and the opening of the on-off valve provided in the middle of the ammonia liquid transfer pipe decreases [see FIG. 4 (d)]. Controlled.
【０００７】[0007]
【発明が解決しようとする課題】ところで、上記制御方
法によると、冷凍負荷が小さくなった場合、図２の破線
にて示すように、開閉弁の開度が最大（例えば、開度が
３０％）になった場合でも、冷媒再生器での加熱再生に
必要な熱量、すなわち充分なアンモニア液流量が得られ
ないという問題があった。According to the above control method, when the refrigeration load is reduced, as shown by the broken line in FIG. 2, the opening of the on-off valve is maximized (for example, when the opening is 30%). ), There is a problem that the amount of heat required for heating and regeneration in the refrigerant regenerator, that is, a sufficient ammonia liquid flow rate, cannot be obtained.
【０００８】そこで、本発明は、低負荷時においても、
冷媒再生器での加熱再生に必要なアンモニア液流量を確
保し得るアンモニア吸収式冷凍機における運転制御方法
を提供することを目的とする。[0008] Therefore, the present invention is to provide a low-load
An object of the present invention is to provide an operation control method in an ammonia absorption refrigerator capable of securing a flow rate of ammonia liquid necessary for heating and regeneration in a refrigerant regenerator.
【０００９】[0009]
【課題を解決するための手段】上記課題を解決するため
に、本発明のアンモニア吸収式冷凍機における運転制御
方法は、蒸発器、吸収器、再生器および精留器からなる
再生部、凝縮器、上記蒸発器からのアンモニア蒸気を吸
収器に移送するアンモニア蒸気移送管と凝縮器からのア
ンモニア液を蒸発器に移送するアンモニア液移送管との
間で熱交換を行う過冷却器、上記蒸発器の底部に溜まっ
たアンモニア液を取り出すとともに途中に設けられた冷
媒再生器によりアンモニア液中の水分を蒸発させて上記
アンモニア蒸気移送管に導くアンモニア液取出管、上記
アンモニア液移送管途中に設けられた開閉弁、並びに上
記凝縮器内のアンモニア液の液面を検出する液面検出計
を具備するアンモニア吸収式冷凍機において、上記液面
検出計からの検出信号により上記開閉弁の開度を制御す
る際に、指示開度が所定値以上の場合には、ＰＩＤ制御
を行うとともに、指示開度が上記所定値より小さい場合
に、全閉にする運転制御方法である。In order to solve the above-mentioned problems, an operation control method for an ammonia absorption refrigerator according to the present invention comprises a regenerating section comprising an evaporator, an absorber, a regenerator and a rectifier, and a condenser. A supercooler for performing heat exchange between an ammonia vapor transfer pipe for transferring ammonia vapor from the evaporator to the absorber and an ammonia liquid transfer pipe for transferring ammonia liquid from the condenser to the evaporator; The ammonia liquid collected at the bottom of the ammonia liquid is taken out, and the water in the ammonia liquid is evaporated by a refrigerant regenerator provided in the middle, and the ammonia liquid take-out pipe is led to the ammonia vapor transfer pipe. In an ammonia absorption refrigerator including an on-off valve and a liquid level detector for detecting the liquid level of the ammonia liquid in the condenser, detection from the liquid level detector When the opening degree of the on-off valve is controlled by the signal, the PID control is performed when the instruction opening degree is equal to or more than a predetermined value, and the operation control is performed to fully close the operation when the instruction opening degree is smaller than the predetermined value. Is the way.
【００１０】上記の運転制御方法によると、液面検出計
からの検出信号により開閉弁の開度を制御する際に、開
度が所定値以上の場合に、ＰＩＤ制御を行うとともに、
開度が所定値より小さくなった場合に、全閉にするよう
にしたので、この全閉時においては、凝縮器にアンモニ
ア液が溜められるため、指示開度が所定値に戻った際
に、冷媒再生器での加熱再生のために必要なアンモニア
液流量を確保することができる。According to the above operation control method, when the opening of the on-off valve is controlled by the detection signal from the liquid level detector, when the opening is equal to or more than a predetermined value, the PID control is performed.
When the opening is smaller than the predetermined value, the valve is fully closed.When the valve is fully closed, the ammonia liquid is stored in the condenser. It is possible to secure a flow rate of the ammonia liquid required for heating and regeneration in the refrigerant regenerator.
【００１１】[0011]
【発明の実施の形態】以下、本発明の実施の形態におけ
るアンモニア吸収式冷凍機における運転制御方法を、図
１および図２に基づき説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An operation control method in an ammonia absorption refrigerator according to an embodiment of the present invention will be described below with reference to FIGS.
【００１２】まず、アンモニア吸収式冷凍機の全体構成
を、図１に基づき説明する。すなわち、このアンモニア
吸収式冷凍機は、冷媒であるアンモニア液を蒸発させる
蒸発器１と、この蒸発器１で蒸発されたアンモニア蒸気
を第１アンモニア蒸気移送管１１を介して導きアンモニ
ア水溶液に吸収する吸収器２と、この吸収器２でアンモ
ニア蒸気を吸収して濃度が濃くなったアンモニア水溶液
をアンモニア水溶液移送管１２を介して導きアンモニア
蒸気の再生を行うための再生器５および濃縮を行う精留
器６からなる再生部３（正確には、アンモニア水溶液は
精留器側に供給される）と、この再生部３で得られたア
ンモニア蒸気を第２アンモニア蒸気移送管１３を介して
導き凝縮させる凝縮器４と、この凝縮器４で得られたア
ンモニア液を上記蒸発器１に移送するアンモニア液移送
管１４と、上記再生器５の底部に溜まった水を吸収器２
に移送する水移送管１５と、上記第１アンモニア蒸気移
送管１１とアンモニア液移送管１４との間で熱交換を行
う過冷却器７と、上記蒸発器１の下部からアンモニア液
を取り出して上記第１アンモニア蒸気移送管１１に導く
アンモニア液取出管１６と、このアンモニア液取出管１
６とアンモニア液移送管１４との間で熱交換を行う冷媒
再生器８と、途中に還流ポンプ１７が介装されて凝縮器
４内のアンモニア液を精留器６に還流させるための還流
管１８と、上記蒸発器１からブラインを取り出すブライ
ン取出管２１途中に設けられてブライン温度を検出する
とともにその検出温度に応じて再生器５に加熱用蒸気を
供給する蒸気供給管２２途中に介装された蒸気量調整弁
３２に所定の指示信号を出力するブライン温度検出計例
えばブライン温度指示調節計３１と、凝縮器４側に設け
られて凝縮器４内の液面を検出するとともにその液面に
応じてアンモニア液移送管１４途中でかつ冷媒再生器８
より下流側位置で介装された開閉弁（その開度が制御さ
れる制御弁である）３４に所定の指示信号を出力する液
面指示調節計（液面検出計）３３と、上記第２アンモニ
ア蒸気移送管１３途中に設けられてアンモニア蒸気温度
を検出するとともにその検出温度に応じて還流管１８途
中に介装された還流量調整弁３６に所定の指示信号すな
わち開度信号を出力するアンモニア蒸気温度検出計例え
ばアンモニア蒸気温度指示調節計３５とが具備されてい
る。なお、上記アンモニア水溶液移送管１２と水移送管
１５との間には、再生器５からの高温水の持つ熱をアン
モニア水溶液側に与える熱回収器９が設けられている。First, the overall structure of an ammonia absorption refrigerator will be described with reference to FIG. That is, this ammonia absorption refrigerator has an evaporator 1 for evaporating the ammonia liquid as a refrigerant, and the ammonia vapor evaporated by the evaporator 1 is guided through the first ammonia vapor transfer pipe 11 to be absorbed in the aqueous ammonia solution. An absorber 2, an ammonia aqueous solution having an increased concentration by absorbing the ammonia vapor by the absorber 2 is guided through an ammonia aqueous solution transfer pipe 12, and a regenerator 5 for regenerating the ammonia vapor and a rectification for concentration A regenerating section 3 composed of a vessel 6 (more precisely, the aqueous ammonia solution is supplied to the rectifier side) and the ammonia vapor obtained in the regenerating section 3 are guided and condensed via a second ammonia vapor transfer pipe 13. A condenser 4, an ammonia liquid transfer pipe 14 for transferring the ammonia liquid obtained by the condenser 4 to the evaporator 1, and water collected at the bottom of the regenerator 5. Osamuki 2
A water transfer pipe 15, a supercooler 7 for exchanging heat between the first ammonia vapor transfer pipe 11 and the ammonia liquid transfer pipe 14, and an ammonia liquid taken out from a lower portion of the evaporator 1 and An ammonia liquid outlet pipe 16 leading to the first ammonia vapor transfer pipe 11;
A refrigerant regenerator 8 for exchanging heat between the liquefier 6 and the ammonia liquid transfer pipe 14, and a reflux pipe through which a reflux pump 17 is interposed to return the ammonia liquid in the condenser 4 to the rectifier 6. And a steam supply pipe 22 which is provided in the middle of a brine extraction pipe 21 for extracting brine from the evaporator 1 and detects the brine temperature and supplies heating steam to the regenerator 5 in accordance with the detected temperature. A brine temperature detector, for example, a brine temperature indicator controller 31, which outputs a predetermined instruction signal to the steam amount adjusting valve 32, and a liquid level in the condenser 4 which is provided on the condenser 4 side and detects the liquid level in the condenser 4. In the middle of the ammonia liquid transfer pipe 14 and the refrigerant regenerator 8
A liquid level indicating controller (liquid level detecting meter) 33 for outputting a predetermined instruction signal to an on-off valve (a control valve whose opening is controlled) interposed at a more downstream position; Ammonia which is provided in the middle of the ammonia vapor transfer pipe 13 to detect the temperature of the ammonia vapor and outputs a predetermined instruction signal, that is, an opening signal, to the reflux control valve 36 provided in the middle of the reflux pipe 18 according to the detected temperature. A steam temperature detector, for example, an ammonia steam temperature indicating controller 35 is provided. A heat recovery unit 9 is provided between the ammonia aqueous solution transfer pipe 12 and the water transfer pipe 15 for giving the heat of the high-temperature water from the regenerator 5 to the ammonia aqueous solution side.
【００１３】上記構成において、蒸発器１から出力され
るブライン温度が設定温度範囲内となるように冷凍サイ
クルが作動される。この時、再生部３（精留器６）から
出力されるアンモニア液の温度が一定温度（または所定
温度範囲）となるように、アンモニア蒸気温度指示調節
計３５により還流量調節弁３６が制御され、また凝縮器
４内の液面が一定（または所定範囲）となるように、液
面指示調節計３３からの指示（検出信号）によりアンモ
ニア液移送管１４途中の開閉弁３４の開度がＰＩＤ制御
される。In the above configuration, the refrigeration cycle is operated such that the brine temperature output from the evaporator 1 falls within the set temperature range. At this time, the recirculation amount control valve 36 is controlled by the ammonia vapor temperature indicating controller 35 so that the temperature of the ammonia liquid output from the regeneration unit 3 (rectifier 6) becomes a constant temperature (or a predetermined temperature range). The opening degree of the on-off valve 34 in the middle of the ammonia liquid transfer pipe 14 is set to PID by an instruction (detection signal) from the liquid level indicating controller 33 so that the liquid level in the condenser 4 becomes constant (or a predetermined range). Controlled.
【００１４】具体的には、液面指示調節計３３からの指
示開度が、設定値（所定値）以上である場合に、開閉弁
３４の開度がＰＩＤ制御され、設定値より小さい場合に
は、全閉にされる。More specifically, when the indicated opening degree from the liquid level indicating controller 33 is equal to or more than a set value (predetermined value), the opening degree of the on-off valve 34 is controlled by PID. Are completely closed.
【００１５】すなわち、図２の実線にて示すように、液
面指示調節計３３からの指示開度が、第１設定値（例え
ば、開度が３０％）Ｐ以上である場合には、液面指示調
節計３３からの指示開度に応じてＰＩＤ制御が行われ
る。一方、第１設定値Ｐを越えた後、指示開度が小さく
なり、第１設定値Ｐを通過して第２設定値（例えば、開
度が２０％）Ｓ以下になった場合に、開閉弁３４はその
指示開度値に拘わらず全閉にされて、指示開度が第１設
定値Ｐに戻るまで、凝縮器４内にアンモニア液が溜めら
れる。That is, as shown by the solid line in FIG. 2, when the indicated opening degree from the liquid level indicating controller 33 is equal to or more than the first set value (for example, the opening degree is 30%) P, PID control is performed according to the instruction opening degree from the surface instruction controller 33. On the other hand, after exceeding the first set value P, when the indicated opening degree becomes small and passes through the first set value P and becomes equal to or less than the second set value (for example, the opening degree is 20%) S, the opening / closing is performed. The valve 34 is fully closed irrespective of the indicated opening value, and the ammonia liquid is stored in the condenser 4 until the indicated opening returns to the first set value P.
【００１６】そして、凝縮器４内にアンモニア液がある
程度溜り、その指示開度が第１設定値Ｐ以上になると、
再度、ＰＩＤ制御が行われて、凝縮器４内に溜められた
アンモニア液がアンモニア液移送管１４内に流される。
すなわち、冷媒再生器８において、アンモニア液取出管
１６に取り出されたアンモニア液の加熱再生が行われ
る。勿論、この時のアンモニア液の流量は、冷媒再生器
８内を通過するアンモニア液取出管１６内を流れるアン
モニア液内の水分を蒸発させるのに充分な量となるよう
にされている。なお、開度が小から大に変動する場合の
設定値（第１設定値）と、開度が大から小に変動する場
合の設定値（第２設定値）とに差を設けているのは、制
御の切り替えを安定して行わせるためである。なお、図
１中に、各場所における温度を表示しておく。When a certain amount of ammonia liquid accumulates in the condenser 4 and the indicated opening becomes equal to or more than the first set value P,
The PID control is performed again, and the ammonia solution stored in the condenser 4 flows into the ammonia solution transfer pipe 14.
That is, in the refrigerant regenerator 8, the ammonia liquid taken out to the ammonia liquid take-out tube 16 is heated and regenerated. Needless to say, the flow rate of the ammonia liquid at this time is set to an amount sufficient to evaporate the water in the ammonia liquid flowing through the ammonia liquid extraction pipe 16 passing through the refrigerant regenerator 8. Note that a difference is provided between a set value when the opening varies from small to large (first set value) and a set value when the opening varies from large to small (second set value). Is to stably switch the control. In addition, the temperature at each location is displayed in FIG.
【００１７】このように、開閉弁３４の指示開度が所定
の設定値より小さい場合に、開閉弁３４を全閉にして、
蒸発器４内にアンモニア液を溜め、そして指示開度が、
設定値以上に戻った際に、開閉弁３４を開いてＰＩＤ制
御を行うようにしているので、従来、ＰＩＤ制御を続け
ていた場合に生じる、冷媒再生器８での再生のための必
要熱量が得られないという不都合を回避することができ
る。As described above, when the instructed opening of the on-off valve 34 is smaller than the predetermined set value, the on-off valve 34 is fully closed,
The ammonia liquid is stored in the evaporator 4, and the indicated opening degree is
Since the PID control is performed by opening the on-off valve 34 when the value returns to the set value or more, the amount of heat required for the regeneration in the refrigerant regenerator 8 conventionally generated when the PID control is continued is reduced. The inconvenience of not being able to be obtained can be avoided.
【００１８】[0018]
【発明の効果】以上のように本発明の運転制御方法によ
ると、液面検出計からの検出信号により開閉弁の開度を
制御する際に、開度が所定値以上の場合に、ＰＩＤ制御
を行うとともに、開度が所定値より小さい場合に、全閉
にするようにしたので、この全閉時に、凝縮器にアンモ
ニア液が溜められるため、指示開度が所定値に戻った際
に、冷媒再生器でのアンモニア液の加熱再生のために必
要なアンモニア液流量を確保することができる。As described above, according to the operation control method of the present invention, when the opening of the on-off valve is controlled by the detection signal from the liquid level detector, the PID control is performed when the opening is equal to or more than a predetermined value. When the opening is smaller than the predetermined value, the valve is fully closed.When the valve is fully closed, the ammonia liquid is stored in the condenser. It is possible to secure the ammonia liquid flow rate necessary for the ammonia liquid heating and regeneration in the refrigerant regenerator.
【図１】本発明の実施の形態におけるアンモニア吸収式
冷凍機の概略構成を示す図である。FIG. 1 is a diagram showing a schematic configuration of an ammonia absorption refrigerator according to an embodiment of the present invention.
【図２】同アンモニア吸収式冷凍機における開閉弁の開
度の指示信号を示すグラフである。FIG. 2 is a graph showing an instruction signal of an opening degree of an on-off valve in the ammonia absorption refrigerator.
【図３】従来例のアンモニア吸収式冷凍機の高負荷時に
おける各機器での運転状態を示すグラフである。FIG. 3 is a graph showing an operation state of each device at the time of a high load of a conventional ammonia absorption refrigerator.
【図４】従来例のアンモニア吸収式冷凍機の低負荷時に
おける各機器での運転状態を示すグラフである。FIG. 4 is a graph showing an operation state of each device when the load of the conventional ammonia absorption refrigerator is low.
１ 蒸発器 ２ 吸収器 ３ 再生部 ４ 凝縮器 ５ 再生器 ６ 精留器 ７ 過冷却器 ８ 冷媒再生器 １１ 第１アンモニア蒸気移送管 １４ アンモニア液移送管 １６ アンモニア液取出管 ２１ ブライン取出管 ３３ 液面指示調節計 ３４ 開閉弁 REFERENCE SIGNS LIST 1 evaporator 2 absorber 3 regenerating part 4 condenser 5 regenerator 6 rectifier 7 subcooler 8 refrigerant regenerator 11 first ammonia vapor transfer pipe 14 ammonia liquid transfer pipe 16 ammonia liquid take-out pipe 21 brine take-out pipe 33 liquid Surface indication controller 34 On-off valve
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大西 尚 大阪府大阪市中央区平野町４丁目１−２ 大阪瓦斯株式会社内 (72)発明者 平中 幸男 大阪府大阪市中央区平野町４丁目１−２ 大阪瓦斯株式会社内 (72)発明者 椿原 昇 大阪府大阪市中央区平野町４丁目１−２ 大阪瓦斯株式会社内 (72)発明者 岩田 克雄 兵庫県尼崎市扶桑町１番10号 住友精密工 業株式会社内 (72)発明者 岩本 皓夫 大阪府大阪市住之江区南港北１丁目７番89 号 日立造船株式会社内 (72)発明者 矢野 猛 大阪府大阪市住之江区南港北１丁目７番89 号 日立造船株式会社内 (72)発明者 吉良 和久 大阪府大阪市住之江区南港北１丁目７番89 号 日立造船株式会社内 (72)発明者 村井 千香 大阪府大阪市住之江区南港北１丁目７番89 号 日立造船株式会社内 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Takashi Onishi 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Yukio Hiranaka 4-chome, Hirano-cho, Chuo-ku, Osaka-shi, Osaka 1-2 Inside Osaka Gas Co., Ltd. (72) Noboru Tsubakihara, Inventor 4-1-2 Hiranocho, Chuo-ku, Osaka City, Osaka Prefecture Inside Osaka Gas Co., Ltd. (72) Katsuo Iwata 1-10 Fusocho, Amagasaki City, Hyogo Prefecture Within Sumitomo Precision Industries Co., Ltd. (72) Inventor Hiroo Iwamoto 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka Inside Hitachi Zosen Corporation (72) Inventor Takeshi Yano 1 Minami-Kohoku, Suminoe-ku, Osaka-shi, Osaka 7-89, Hitachi Zosen Corporation (72) Inventor Kazuhisa Kira 1-7-89, Minami Kohoku, Suminoe-ku, Osaka-shi, Osaka Hitachi Zosen Corporation (72) Inventor Chika Murai Dai 1-7-89 Minami Kohoku, Suminoe-ku, Osaka-shi
Claims (1)
らなる再生部、凝縮器、上記蒸発器からのアンモニア蒸
気を吸収器に移送するアンモニア蒸気移送管と凝縮器か
らのアンモニア液を蒸発器に移送するアンモニア液移送
管との間で熱交換を行う過冷却器、上記蒸発器の底部に
溜まったアンモニア液を取り出すとともに途中に設けら
れた冷媒再生器によりアンモニア液中の水分を蒸発させ
て上記アンモニア蒸気移送管に導くアンモニア液取出
管、上記アンモニア液移送管途中に設けられた開閉弁、
並びに上記凝縮器内のアンモニア液の液面を検出する液
面検出計を具備するアンモニア吸収式冷凍機において、
上記液面検出計からの検出信号により上記開閉弁の開度
を制御する際に、指示開度が所定値以上の場合には、Ｐ
ＩＤ制御を行うとともに、指示開度が上記所定値より小
さい場合に、全閉にすることを特徴とするアンモニア吸
収式冷凍機における運転制御方法。1. A regenerating section comprising an evaporator, an absorber, a regenerator and a rectifier, a condenser, an ammonia vapor transfer pipe for transferring ammonia vapor from the evaporator to the absorber, and an ammonia liquid from the condenser. A supercooler that exchanges heat with the ammonia liquid transfer pipe that transfers to the evaporator, removes the ammonia liquid accumulated at the bottom of the evaporator, and evaporates the water in the ammonia liquid by a refrigerant regenerator provided on the way. Ammonia liquid take-out pipe to be led to the ammonia vapor transfer pipe, an on-off valve provided in the middle of the ammonia liquid transfer pipe,
And an ammonia absorption refrigerator having a liquid level detector for detecting the liquid level of the ammonia liquid in the condenser,
When controlling the opening of the on-off valve based on the detection signal from the liquid level detector, if the indicated opening is a predetermined value or more, P
An operation control method for an ammonia absorption refrigerator comprising performing ID control and fully closing when an indicated opening degree is smaller than the predetermined value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10001942A JPH11201578A (en) | 1998-01-08 | 1998-01-08 | Operation control method for ammonium absorption refrigerating machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10001942A JPH11201578A (en) | 1998-01-08 | 1998-01-08 | Operation control method for ammonium absorption refrigerating machine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH11201578A true JPH11201578A (en) | 1999-07-30 |
Family
ID=11515680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10001942A Pending JPH11201578A (en) | 1998-01-08 | 1998-01-08 | Operation control method for ammonium absorption refrigerating machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11201578A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8046107B2 (en) * | 2002-12-09 | 2011-10-25 | Hudson Technologies, Inc. | Method and apparatus for optimizing refrigeration systems |
| US10436488B2 (en) | 2002-12-09 | 2019-10-08 | Hudson Technologies Inc. | Method and apparatus for optimizing refrigeration systems |
-
1998
- 1998-01-08 JP JP10001942A patent/JPH11201578A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8046107B2 (en) * | 2002-12-09 | 2011-10-25 | Hudson Technologies, Inc. | Method and apparatus for optimizing refrigeration systems |
| US10436488B2 (en) | 2002-12-09 | 2019-10-08 | Hudson Technologies Inc. | Method and apparatus for optimizing refrigeration systems |
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