JPH0712090A - Surging generation preventive method for compressor - Google Patents

Surging generation preventive method for compressor

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Publication number
JPH0712090A
JPH0712090A JP18205593A JP18205593A JPH0712090A JP H0712090 A JPH0712090 A JP H0712090A JP 18205593 A JP18205593 A JP 18205593A JP 18205593 A JP18205593 A JP 18205593A JP H0712090 A JPH0712090 A JP H0712090A
Authority
JP
Japan
Prior art keywords
gas
suction
compressor
flow rate
molecular weight
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.)
Withdrawn
Application number
JP18205593A
Other languages
Japanese (ja)
Inventor
Yasuhiro Kawashima
康弘 川島
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP18205593A priority Critical patent/JPH0712090A/en
Publication of JPH0712090A publication Critical patent/JPH0712090A/en
Withdrawn legal-status Critical Current

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Abstract

PURPOSE:To surely prevent generation of surging by finding a suction flow rate corresponding to gas molecular weight according to a polytropic head value assumed from an outside diametrical dimension or the rotating speed or the like of an compressor impeller. CONSTITUTION:Impeller rotating speed of a compressor 1 is supplied to a polytropic computing element 22 from a speed indicator 24 arranged in a driving machine 2. A thermometer 26 is arranged in a gas suction side passage of the compressor 1, and a suction gas temperature Ts is supplied to a molecular weight computing element 23. On the other hand, a thermometer 28 is arranged in a gas delivery side passage, and a delivery gas temperature Td is supplied to the molecular weight computing element 23. Suction pressure Ps or delivery pressure Pd is also supplied to the molecular weight computing element 23. A surging preventive controller 21 carries out operation to correct a polytropic head value according to respective measured data, and finds a suction flow rate Qs according to gas molecular weight. A signal is generated from a flow rate controller 17 according to the suction gas flow rate Qs, and a control valve 12 is driven through an electropneumatic converter 13, and generation of surging is avoided.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、圧縮機において、吸込
流量を絞っていったときに発生するサージングを防止す
るための方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for preventing surging which occurs when a suction flow rate is reduced in a compressor.

【0002】[0002]

【従来の技術】圧縮機では、吸込流量を大流量側から少
流量側へ絞っていくと、吐出圧力が脈動したりロータの
軸振動が高くなったりする現象、すなわちサージングが
発生する。このサージングが発生すると、圧縮機の運転
を継続することが困難となるので、圧縮機にはサージン
グの発生を防止するための、サージング防止コントロー
ラが備えられていて、吸込流量が減ってきてサージング
が発生しそうになると、圧縮機の吸込側と吐出側との間
に設けられている制御弁を操作して、吐出ガスを吸込側
へ戻して吸込流量を増やすようにしている。
2. Description of the Related Art In a compressor, when the suction flow rate is reduced from a large flow rate side to a small flow rate side, a phenomenon in which the discharge pressure pulsates or the rotor shaft vibration increases, that is, surging occurs. When this surging occurs, it becomes difficult to continue the operation of the compressor.Therefore, the compressor is equipped with a surging prevention controller to prevent the occurrence of surging, and the suction flow rate decreases and surging occurs. When it is about to occur, the control valve provided between the suction side and the discharge side of the compressor is operated to return the discharge gas to the suction side to increase the suction flow rate.

【0003】図4は、従来の圧縮機のサージング発生防
止方法を説明するために示した圧縮機の系統図であり、
先ずこの図を参照して、従来の圧縮機のサージング発生
防止方法について説明する。
FIG. 4 is a system diagram of a compressor shown for explaining a conventional method for preventing surging of a compressor.
First, a conventional method for preventing the occurrence of surging in a compressor will be described with reference to this figure.

【0004】図4において、圧縮機1は駆動機2によっ
て駆動され、吸込口3からガスが吸込まれ、吐出口4か
ら圧縮されたガスが吐出される。ガスの吸込側経路には
オリフィス5と圧力計6が設けられ、それぞれ吸込流量
オリフィス差圧ΔPsと吸込圧力Psが計測される。一
方、ガスの吐出側経路には圧力計7が設けられ、吐出圧
力Pdが計測される。これらの計測値は、それぞれ流量
伝送器8、圧力伝送器9、10を介してサージング防止
コントローラ11へ送られる。そして、圧縮機1の吸込
側経路と吐出側経路との間には、制御弁12が設けられ
て両経路を接続しており、この制御弁12はサージング
防止コントローラ11からの出力によって、電空変換器
13を介して制御されるようになっている。なお、14
は空気供給器である。
In FIG. 4, the compressor 1 is driven by a driving machine 2, gas is sucked in through a suction port 3, and compressed gas is discharged through a discharge port 4. An orifice 5 and a pressure gauge 6 are provided in the gas suction side path, and the suction flow rate orifice differential pressure ΔPs and the suction pressure Ps are measured, respectively. On the other hand, a pressure gauge 7 is provided in the gas discharge side path to measure the discharge pressure Pd. These measured values are sent to the surging prevention controller 11 via the flow rate transmitter 8 and the pressure transmitters 9 and 10, respectively. A control valve 12 is provided between the suction-side passage and the discharge-side passage of the compressor 1 to connect both passages. It is adapted to be controlled via the converter 13. In addition, 14
Is an air supplier.

【0005】さて、サージング防止コントローラ11で
は、圧力伝送器9、10からの供給データから、圧力比
演算器15で吸込圧力Psに対する吐出圧力Pdの比
(Pd/Ps)を求め、この値と流量伝送器8からの吸
込流量オリフィス差圧ΔPsとから流量演算器16で吸
込流量Qsを求める。この値は流量調節計17へ供給さ
れ、吸込流量Qsがサージングが発生しそうな値に近付
いたとき、制御弁12を開くための信号を発生する。す
なわち、流量調節計17からの信号は電気信号であり、
これを電空変換器13で圧力に変換して制御弁12へ供
給する。そして、制御弁12が開かれると、吐出ガスが
吸込側へ戻されることとなり、吸込流量が増加してサー
ジングの発生が回避される。
In the surging prevention controller 11, the ratio (Pd / Ps) of the discharge pressure Pd to the suction pressure Ps is calculated by the pressure ratio calculator 15 from the supply data from the pressure transmitters 9 and 10. The suction flow rate Qs is calculated by the flow rate calculator 16 from the suction flow rate orifice differential pressure ΔPs from the transmitter 8. This value is supplied to the flow rate controller 17, and when the suction flow rate Qs approaches a value at which surging is likely to occur, a signal for opening the control valve 12 is generated. That is, the signal from the flow controller 17 is an electric signal,
This is converted into pressure by the electropneumatic converter 13 and supplied to the control valve 12. Then, when the control valve 12 is opened, the discharge gas is returned to the suction side, the suction flow rate increases, and the occurrence of surging is avoided.

【0006】図5は、圧縮機の吸込流量と昇圧比との関
係を、回転数をパラメータとして示した特性図であり、
各回転数におけるサージングの発生位置を実線Lで示し
てある。そして、サージングの発生を回避するための、
制御弁調節ラインを破線lで示してある。従って、予め
設定しておいた制御弁調節ラインlよりも吸込流量Qs
が小さくなった場合に、サージング防止コントローラ1
1から制御弁12へ信号が送られて弁を開かせる。
FIG. 5 is a characteristic diagram showing the relationship between the suction flow rate of the compressor and the boost ratio, with the number of revolutions as a parameter.
The solid line L indicates the position where surging occurs at each rotation speed. And to avoid the occurrence of surging,
The control valve adjustment line is indicated by dashed line l. Therefore, the suction flow rate Qs is higher than that of the preset control valve adjustment line l.
The surging prevention controller 1
A signal is sent from 1 to the control valve 12 to open the valve.

【0007】[0007]

【発明が解決しようとする課題】ところで、上述の従来
のサージング発生防止方法は、圧縮機の取扱うガスの分
子量が一定であることが前提条件となっていた。そのた
め、運転中にガスの分子量が大きく変化するようなガス
を取扱う圧縮機には適用できないという問題があった。
By the way, the above-mentioned conventional method for preventing the occurrence of surging is premised on that the gas handled by the compressor has a constant molecular weight. Therefore, there is a problem that it cannot be applied to a compressor that handles a gas whose molecular weight greatly changes during operation.

【0008】その理由は、数式1に示すように、The reason is as shown in Equation 1.

【数1】 吸込流量Qsは、吸込流量オリフィス差圧ΔPsとガス
の分子量MWの積の平方根に比例するので、ガスの分子
量MWが変動すると、吸込流量Qsの演算値の誤差が大
きくなるためである。従って、この分子量MWをたびた
び計測して外部から入力するようにすれば、吸込流量Q
sの演算値は正しいものとなるが、常に分子量MWを計
測して管理することは困難であった。
[Equation 1] This is because the suction flow rate Qs is proportional to the square root of the product of the suction flow rate orifice differential pressure ΔPs and the gas molecular weight MW, so that if the gas molecular weight MW fluctuates, the error in the calculated value of the suction flow rate Qs increases. Therefore, if this molecular weight MW is frequently measured and input from the outside, the suction flow rate Q
Although the calculated value of s is correct, it has been difficult to constantly measure and manage the molecular weight MW.

【0009】なお、従来のサージング発生防止方法にお
いて、制御弁12の調節ライン(図4の破線l)を、圧
縮機の吸込流量Qsの相当大きい側へ設定しておけば、
外部からガスの分子量MWを入力することなく、分子量
が異なる全ての運転条件でサージングを防止することは
可能である。しかしこのときは、圧縮機の低流量運転時
でも、制御弁12を介して多量の吐出ガスが吸込側へ還
流されることになり、ガス動力が大きくなって現実的で
はない。
In the conventional surging prevention method, if the adjustment line of the control valve 12 (broken line 1 in FIG. 4) is set to the side where the suction flow rate Qs of the compressor is considerably large,
It is possible to prevent surging under all operating conditions with different molecular weights, without inputting the molecular weight MW of the gas from the outside. However, at this time, a large amount of discharge gas is recirculated to the suction side through the control valve 12 even when the compressor is operating at a low flow rate, and the gas power becomes large, which is not realistic.

【0010】本発明は、このような従来技術の課題を解
決するためになされたもので、取扱うガスの分子量が大
幅に変化するような運転条件であっても、圧縮機のサー
ジングの発生を確実に防止することができる方法を提供
することを目的とする。
The present invention has been made in order to solve the problems of the prior art as described above, and it is ensured that the surging of the compressor occurs even under the operating conditions in which the molecular weight of the gas to be handled changes significantly. It aims at providing the method which can be prevented.

【0011】[0011]

【課題を解決するための手段】上記の課題を解決するた
めに、本発明に係る圧縮機のサージング発生防止方法
は、圧縮機インペラの外径寸法やその回転数などを基に
ポリトロピックヘッド値を仮定する段階と、この仮定し
たポリトロピックヘッド値を圧縮機の吸込ガスおよび吐
出ガスの圧力と温度から補正する段階と、この補正され
たポリトロピックヘッド値を基に圧縮機が取扱っている
ガスの分子量を算出する段階と、この段階によって算出
されたガスの分子量と吸込流量オリフィス差圧とから吸
込ガス流量を算出する段階と、これらの段階を繰り返し
実行することにより圧縮機に吸込まれるガスの分子量に
応じた吸込流量を求める段階と、この段階によって求め
られた吸込ガス流量に応じて圧縮機におけるサージング
の発生を防止するように吐出ガスを吸込側へ取込むため
の制御弁を制御する段階と包含する。
In order to solve the above problems, a method for preventing the occurrence of surging in a compressor according to the present invention is based on a polytropic head value based on the outer diameter dimension of a compressor impeller and the number of revolutions thereof. And the step of correcting the assumed polytropic head value from the pressure and temperature of the suction gas and the discharge gas of the compressor, and the gas handled by the compressor based on the corrected polytropic head value. The step of calculating the molecular weight of the gas, the step of calculating the suction gas flow rate from the gas molecular weight calculated in this step and the suction flow orifice differential pressure, and the gas sucked into the compressor by repeatedly performing these steps. It is necessary to prevent the occurrence of surging in the compressor according to the step of obtaining the suction flow rate according to the molecular weight of and the suction gas flow rate obtained in this step. It encompasses the step of controlling the control valve for taking the discharge gas to the suction side.

【0012】[0012]

【作 用】上記の手段によれば、圧縮機が取扱っている
ガスの分子量を自動的に算出し、これにより吸込ガス流
量を精度良く算出して、サージングの発生を防止するの
に必要な最小限の吐出ガスを吸込側へ取込むように制御
弁を制御するので、運転中に分子量が大きく変化するよ
うなガスを取扱う圧縮機であっても、確実にサージング
の発生を防止することができるとともに、吸込側へ取込
む吐出ガスの量も少なくしてガス動力の低減を図ること
ができる。
[Operation] According to the above means, the molecular weight of the gas handled by the compressor is automatically calculated, and the suction gas flow rate is calculated with this accuracy, which is the minimum necessary to prevent the occurrence of surging. Since the control valve is controlled so as to take in the discharge gas of the maximum amount to the suction side, it is possible to reliably prevent the occurrence of surging even in a compressor that handles a gas whose molecular weight greatly changes during operation. At the same time, the amount of discharge gas taken into the suction side can be reduced to reduce gas power.

【0013】[0013]

【実施例】以下本発明に係る圧縮機のサージング発生防
止方法の一実施例について、図1ないし図3を参照して
詳細に説明する。なお、図1において、図4と同一部分
には同一符号を付して示してあるのでその部分の説明は
省略する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a method for preventing the occurrence of surging in a compressor according to the present invention will be described in detail below with reference to FIGS. Note that, in FIG. 1, the same parts as those in FIG. 4 are denoted by the same reference numerals, and the description thereof will be omitted.

【0014】先ず、本発明に係る圧縮機のサージング発
生防止方法の処理の流れを図2をもとに説明する。すな
わち、第1ステップとして、圧縮機1の図示しないイン
ペラの外径Dと、計測する回転数Nとからインペラの周
速uを求める。計算式は数式2で与えられる。
First, the processing flow of the method for preventing the occurrence of surging in a compressor according to the present invention will be described with reference to FIG. That is, as the first step, the peripheral speed u of the impeller is obtained from the outer diameter D of the impeller (not shown) of the compressor 1 and the measured rotation speed N. The calculation formula is given by Formula 2.

【数2】 [Equation 2]

【0015】次に第2ステップとして、流量係数φs、
吸込温度Ts、インペラ周速u、ガス分子量MWの関数
であるポリトロピック圧力係数μpを予想値を仮定し
て、ポリトロピックヘッド値Hpを求める。この計算式
は数式3で与えられる。
Next, as a second step, the flow coefficient φs,
The polytropic head value Hp is obtained by assuming an expected value for the polytropic pressure coefficient μp, which is a function of the suction temperature Ts, the impeller peripheral velocity u, and the gas molecular weight MW. This calculation formula is given by Formula 3.

【数3】 [Equation 3]

【0016】次に第3ステップとして、圧縮機の状態量
としての吸込圧力Ps、吸込温度Ts、吐出圧力Pd、
および吐出温度Tdから数式4によりポリトロピック指
数nを求め、さらに数式5に示すポリトロピックヘッド
Hpの式から分子量MWを求める。
Next, as a third step, the suction pressure Ps as the state quantity of the compressor, the suction temperature Ts, the discharge pressure Pd,
Then, the polytropic index n is calculated from the discharge temperature Td by the formula 4, and the molecular weight MW is calculated from the formula of the polytropic head Hp shown in the formula 5.

【数4】 [Equation 4]

【数5】 [Equation 5]

【0017】次に第4ステップとして、既に示した数式
1により、吸込流量オリフィス差圧ΔPsとガス分子量
MWとから吸込流量Qsを求め、さらに数式6から無次
元の吸込流量を表す流量係数φsを求める。
Next, as the fourth step, the suction flow rate Qs is obtained from the suction flow rate orifice differential pressure ΔPs and the gas molecular weight MW by the above-mentioned equation 1, and the flow rate coefficient φs representing the dimensionless suction flow rate is obtained from the equation 6. Ask.

【数6】 [Equation 6]

【0018】次に第5ステップとして、吸込温度Tsや
インペラ周速uの測定値と、今までに求めた流量係数φ
sとガス分子量MWとから、ポリトロピック圧力係数μ
pを数式7に示す関数として求める。
Next, as a fifth step, the measured values of the suction temperature Ts and the impeller peripheral speed u, and the flow coefficient φ obtained so far.
s and gas molecular weight MW, polytropic pressure coefficient μ
p is obtained as a function shown in Expression 7.

【数7】μp=μp(φs,Ts,u,MW)(7) μp = μp (φs, Ts, u, MW)

【0019】次に第6ステップとして、このポリトロピ
ック圧力係数μpを、数式3のポリトロピックヘッド値
Hpを求める式に代入し、以下同様の演算を繰返すこと
によりポリトロピック圧力係数μpを収束させる。
Next, as a sixth step, this polytropic pressure coefficient μp is substituted into the expression for obtaining the polytropic head value Hp of the mathematical expression 3, and the same calculation is repeated thereafter to converge the polytropic pressure coefficient μp.

【0020】次に第7、すなわち最後のステップとし
て、ポリトロピック圧力係数μpが収束したら、図3に
示す特性図からサージング発生流量係数φssを求め、
さらに制御弁12を操作するときの流量係数φscを決
定する。そして、圧縮機の運転中の流量係数φsが制御
弁12を操作する流量係数φscよりも小さければ、制
御弁12を開いて吐出ガスを吸込側へ導入してサージン
グの発生を防止する。
Next, in the seventh or final step, when the polytropic pressure coefficient μp has converged, the surging occurrence flow coefficient φss is obtained from the characteristic diagram shown in FIG.
Further, the flow coefficient φsc when operating the control valve 12 is determined. When the flow coefficient φs during operation of the compressor is smaller than the flow coefficient φsc for operating the control valve 12, the control valve 12 is opened to introduce the discharge gas to the suction side to prevent the occurrence of surging.

【0021】次に、このような本発明によるサージング
発生防止方法を適用した圧縮機の一例を図1の系統図に
よって説明する。
Next, an example of a compressor to which the surging occurrence preventing method according to the present invention is applied will be described with reference to the system diagram of FIG.

【0022】サージング防止コントローラ21は、従来
のものよりも大幅に機能が拡大されており、ポリトロピ
ック演算器22、分子量演算器23が追設されている。
そして、駆動機2に設けた回転計24から回転数伝送器
25を介して圧縮機1のインペラの回転数がポリトロピ
ック演算器22へ供給される。また、圧縮機1のガスの
吸込側経路には温度計26が設けられ、温度伝送器27
を介して吸込ガス温度Tsを分子量演算器23へ供給し
ている。一方、ガスの吐出側経路には温度計28が設け
られ、温度伝送器29を介して吐出ガス温度Tdを分子
量演算器23へ供給している。なお、吸込圧力Psや吐
出圧力Pdも、分子量演算器23へ供給される。
The function of the surging prevention controller 21 is greatly expanded as compared with the conventional one, and a polytropic calculator 22 and a molecular weight calculator 23 are additionally provided.
Then, the rotation speed of the impeller of the compressor 1 is supplied from the tachometer 24 provided in the drive machine 2 to the polytropic calculator 22 via the rotation speed transmitter 25. Further, a thermometer 26 is provided in the gas suction side path of the compressor 1, and a temperature transmitter 27 is provided.
The suction gas temperature Ts is supplied to the molecular weight calculator 23 via. On the other hand, a thermometer 28 is provided in the gas discharge side path, and the discharge gas temperature Td is supplied to the molecular weight calculator 23 via a temperature transmitter 29. The suction pressure Ps and the discharge pressure Pd are also supplied to the molecular weight calculator 23.

【0023】サージング防止コントローラ21では、図
2の流れ図に沿って説明したように、順次演算処理を行
い、ガス分子量MWや吸込流量Qsを求める。さらに分
子量にもとづくサージング発生流量係数φssを求め、
圧縮機1の運転中の吸込流量係数φsが、制御弁12を
操作する流量係数φscよりも小さければ、制御弁12
を開くように流量調節計17から信号を発生し、電空変
換器13を介して制御弁12を開き、吐出ガスを吸込側
へ導入してサージングの発生を回避させる。
As described with reference to the flow chart of FIG. 2, the surging prevention controller 21 sequentially performs arithmetic processing to obtain the gas molecular weight MW and the suction flow rate Qs. Furthermore, the surging generation flow coefficient φss based on the molecular weight is calculated,
If the suction flow rate coefficient φs during operation of the compressor 1 is smaller than the flow rate coefficient φsc for operating the control valve 12, the control valve 12
A signal is generated from the flow rate controller 17 to open the control valve 12, the control valve 12 is opened via the electropneumatic converter 13, and the discharge gas is introduced to the suction side to avoid the occurrence of surging.

【0024】[0024]

【発明の効果】以上詳述したように、本発明によれば、
圧縮機の取扱いガスの分子量が大幅に変化するような運
転条件であっても、常時分子量を算出して吸込流量を求
め、これによりサージング発生の予防策を講じるので、
サージングの発生を確実に防止することができる。ま
た、サージングの発生点を精度良く求めることができる
ので、圧縮機の低流量運転においては、吸込側へ導入す
る吐出ガスの量を少なくすることができ、ガス動力を低
減することができる。
As described in detail above, according to the present invention,
Even under operating conditions where the molecular weight of the gas handled by the compressor changes drastically, the molecular weight is constantly calculated to obtain the suction flow rate, and as a result, the preventive measures for surging are taken.
It is possible to reliably prevent the occurrence of surging. Moreover, since the surging point can be obtained with high accuracy, the amount of discharge gas introduced to the suction side can be reduced and the gas power can be reduced during low flow rate operation of the compressor.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に係るサージング発生防止方法を適用し
た圧縮機の一例を示した系統図である。
FIG. 1 is a system diagram showing an example of a compressor to which a surging occurrence prevention method according to the present invention is applied.

【図2】本発明に係る圧縮機のサージング発生防止方法
の処理の流れを示した流れ図である。
FIG. 2 is a flowchart showing a processing flow of a method for preventing surging from occurring in a compressor according to the present invention.

【図3】圧縮機の無次元性能特性を示した特性図であ
る。
FIG. 3 is a characteristic diagram showing a dimensionless performance characteristic of a compressor.

【図4】従来の圧縮機のサージング発生防止方法を説明
するために示した圧縮機の系統図である。
FIG. 4 is a system diagram of a compressor shown for explaining a conventional method of preventing surging of a compressor.

【図5】圧縮機の吸込流量と昇圧比との関係を、回転数
をパラメータとして示した特性図である。
FIG. 5 is a characteristic diagram showing the relationship between the suction flow rate of the compressor and the boost ratio, using the number of revolutions as a parameter.

【符号の説明】[Explanation of symbols]

1 圧縮機 2 駆動機 3 吸込口 4 吐出口 5 オリフィス 6 圧力計 7 圧力計 8 流量伝送器 9 圧力伝送器 10 圧力伝送器 12 制御弁 13 電空変換器 14 空気供給器 16 流量演算器 17 流量演算器 21 サージング防止コントローラ 22 ポリトロピック演算器 23 分子量演算器 24 回転計 25 回転数伝送器 26 温度計 27 温度伝送器 28 温度計 29 温度伝送器 1 Compressor 2 Driver 3 Suction port 4 Discharge port 5 Orifice 6 Pressure gauge 7 Pressure gauge 8 Flow transmitter 9 Pressure transmitter 10 Pressure transmitter 12 Control valve 13 Electro-pneumatic converter 14 Air supplier 16 Flow rate calculator 17 Flow rate Calculator 21 Surging prevention controller 22 Polytropic calculator 23 Molecular weight calculator 24 Tachometer 25 Rotation speed transmitter 26 Thermometer 27 Temperature transmitter 28 Thermometer 29 Temperature transmitter

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】圧縮機インペラの外径寸法やその回転数な
どを基にポリトロピックヘッド値を仮定する段階と、こ
の仮定したポリトロピックヘッド値を圧縮機の吸込ガス
および吐出ガスの圧力と温度から補正する段階と、この
補正されたポリトロピックヘッド値を基に圧縮機が取扱
っているガスの分子量を算出する段階と、この段階によ
って算出されたガスの分子量と吸込流量オリフィス差圧
とから吸込ガス流量を算出する段階と、これらの段階を
繰り返し実行することにより圧縮機に吸込まれるガスの
分子量に応じた吸込流量を求める段階と、この段階によ
って求められた吸込ガス流量に応じて圧縮機におけるサ
ージングの発生を防止するように吐出ガスを吸込側へ取
込むための制御弁を制御する段階とを包含することを特
徴とする圧縮機のサージング発生防止方法。
1. A step of assuming a polytropic head value based on the outer diameter dimension of a compressor impeller and the number of revolutions thereof, and the assumed polytropic head value and the pressure and temperature of suction gas and discharge gas of the compressor. The step of correcting from the above, the step of calculating the molecular weight of the gas handled by the compressor based on this corrected polytropic head value, and the suction from the gas molecular weight and the suction flow orifice differential pressure calculated in this step The step of calculating the gas flow rate, the step of obtaining the suction flow rate according to the molecular weight of the gas sucked into the compressor by repeating these steps, and the compressor according to the suction gas flow rate obtained in this step And controlling the control valve for taking in the discharge gas to the suction side so as to prevent the occurrence of surging in the compressor. Jingu occurrence prevention method.
JP18205593A 1993-06-28 1993-06-28 Surging generation preventive method for compressor Withdrawn JPH0712090A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18205593A JPH0712090A (en) 1993-06-28 1993-06-28 Surging generation preventive method for compressor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18205593A JPH0712090A (en) 1993-06-28 1993-06-28 Surging generation preventive method for compressor

Publications (1)

Publication Number Publication Date
JPH0712090A true JPH0712090A (en) 1995-01-17

Family

ID=16111558

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18205593A Withdrawn JPH0712090A (en) 1993-06-28 1993-06-28 Surging generation preventive method for compressor

Country Status (1)

Country Link
JP (1) JPH0712090A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304063A1 (en) * 2003-01-31 2004-08-12 Man Turbomaschinen Ag Method for the safe operation of turbo compressors with a surge limit control and a surge limit control valve
ITBA20090013A1 (en) * 2009-03-19 2010-09-20 Ind Plants Consultants Srl ANTIPOMPAGGIO PROTECTION SYSTEM FOR CENTRIFUGAL COMPRESSORS
ITBA20110037A1 (en) * 2011-07-07 2013-01-08 Ind Plant Consultant Srl METHOD FOR PROTECTION OF CENTRIFUGAL COMPRESSORS FROM THE PUMPING PHENOMENON
JP2013108493A (en) * 2011-11-23 2013-06-06 General Electric Co <Ge> Method and apparatus for optimizing operation of turbine system under flexible load
US9328949B2 (en) 2009-03-30 2016-05-03 Tmeic Corporation Compressor surge control system and method
JP2016514789A (en) * 2013-03-26 2016-05-23 ヌオーヴォ ピニォーネ ソチエタ レスポンサビリタ リミタータNuovo Pignone S.R.L. Method and system for controlling a turbo compressor
CN106382245A (en) * 2016-12-01 2017-02-08 王先宏 Compressor surge control method and system
JP2019148198A (en) * 2018-02-26 2019-09-05 三菱重工コンプレッサ株式会社 Performance evaluation method, performance evaluation device and performance evaluation system
CN114542501A (en) * 2020-11-24 2022-05-27 麦克维尔空调制冷(武汉)有限公司 Control method and control device of compressor and heat exchange system

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10304063A1 (en) * 2003-01-31 2004-08-12 Man Turbomaschinen Ag Method for the safe operation of turbo compressors with a surge limit control and a surge limit control valve
US7025558B2 (en) 2003-01-31 2006-04-11 Man Turbo Ag Process for the reliable operation of turbocompressors with surge limit control and surge limit control valve
ITBA20090013A1 (en) * 2009-03-19 2010-09-20 Ind Plants Consultants Srl ANTIPOMPAGGIO PROTECTION SYSTEM FOR CENTRIFUGAL COMPRESSORS
US9328949B2 (en) 2009-03-30 2016-05-03 Tmeic Corporation Compressor surge control system and method
ITBA20110037A1 (en) * 2011-07-07 2013-01-08 Ind Plant Consultant Srl METHOD FOR PROTECTION OF CENTRIFUGAL COMPRESSORS FROM THE PUMPING PHENOMENON
WO2013005129A3 (en) * 2011-07-07 2013-06-27 Industrial Plant Consultant Srl Antisurge protection method for centrifugal compressors
JP2013108493A (en) * 2011-11-23 2013-06-06 General Electric Co <Ge> Method and apparatus for optimizing operation of turbine system under flexible load
US10544739B2 (en) 2011-11-23 2020-01-28 General Electric Company Method and apparatus for optimizing the operation of a turbine system under flexible loads
JP2016514789A (en) * 2013-03-26 2016-05-23 ヌオーヴォ ピニォーネ ソチエタ レスポンサビリタ リミタータNuovo Pignone S.R.L. Method and system for controlling a turbo compressor
CN106382245A (en) * 2016-12-01 2017-02-08 王先宏 Compressor surge control method and system
JP2019148198A (en) * 2018-02-26 2019-09-05 三菱重工コンプレッサ株式会社 Performance evaluation method, performance evaluation device and performance evaluation system
CN114542501A (en) * 2020-11-24 2022-05-27 麦克维尔空调制冷(武汉)有限公司 Control method and control device of compressor and heat exchange system

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