JPS5816109B2 - Liquid level control device for brackish water drum in solar thermal utilization equipment - Google Patents
Liquid level control device for brackish water drum in solar thermal utilization equipmentInfo
- Publication number
- JPS5816109B2 JPS5816109B2 JP54144482A JP14448279A JPS5816109B2 JP S5816109 B2 JPS5816109 B2 JP S5816109B2 JP 54144482 A JP54144482 A JP 54144482A JP 14448279 A JP14448279 A JP 14448279A JP S5816109 B2 JPS5816109 B2 JP S5816109B2
- Authority
- JP
- Japan
- Prior art keywords
- brackish water
- water drum
- liquid level
- pressure
- detector
- 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.)
- Expired
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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Description
【発明の詳細な説明】
本発明は太陽熱利用設備における汽水ドラムの液面レベ
ル制御装置に関し、従来手動で行っていた汽水ドラムの
液面レベル制御を確実に自動制御することにより運転員
の労力を軽減しようとするものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid level control device for a brackish water drum in a solar thermal utilization facility, and is capable of reducing the labor of an operator by reliably automatically controlling the liquid level of a brackish water drum, which was conventionally performed manually. This is what we are trying to reduce.
太陽熱利用設備における汽水ドラムから出てゆく蒸気は
通常発電タービンや圧力水タンク等の負荷に供給される
。Steam exiting from a brackish water drum in a solar thermal facility is usually supplied to a load such as a power generation turbine or a pressurized water tank.
また、圧力水タンク内の圧力は効率面から発電タービン
に供給する圧力よりかなり高くされているが普通である
。In addition, the pressure inside the pressure water tank is normally set to be considerably higher than the pressure supplied to the power generation turbine for efficiency reasons.
一方、太陽エネルギは天気により大幅に変動するので、
太陽エネルギによって加熱され蒸発せしめられる。On the other hand, solar energy fluctuates significantly depending on the weather, so
It is heated and evaporated by solar energy.
汽水ドラム内の蒸気圧力が変動して汽水ドラムの液面下
の気液混合物の状態が変化するので液面レベルを一定に
保つために供給される供給水の供給量を変更したとき該
液面レベルの応答いわゆるプロセス特性が変化する。The steam pressure in the brackish water drum fluctuates and the state of the gas-liquid mixture below the liquid level in the brackish water drum changes, so when the amount of water supplied is changed to keep the liquid level constant, the liquid level changes. The response of the level, the so-called process characteristics, changes.
したがって、異なる圧力状態における汽水ドラムの液面
レベルを安定化するには汽水ドラム内の圧力変化に応じ
て汽水ドラムの液面レベル制御系のゲインを変えて汽水
ドラム内圧力が異なっても常にほぼ最適な制御が出来る
様にすれば良い。Therefore, in order to stabilize the liquid level in the brackish water drum under different pressure conditions, it is necessary to change the gain of the liquid level control system in the brackish water drum according to the pressure change in the brackish water drum so that it is always approximately equal to It is best to ensure optimal control.
本発明は以上の事情を考慮してなされたもので、太陽エ
ネルギにより蒸発せしめられた蒸気を貯える汽水ドラム
内の圧力を検出する圧力検出器と、この圧力検出器によ
り検出された圧力に応じて演算を行なう関数演算器と、
上記汽水ドラムの液面レベルを検出するレベル検出器と
、このレベル検出器からの信号を受けて該汽水ドラムの
液面レベルを目標値に保つべく出力信号を算出する調節
計と、この調節計よりの出力信号と上記関数演算器より
の出力信号とを受けて汽水ドラムの液面レベル調節信号
を発生する乗算器とを具備しているので、汽水ドラム内
の圧力変化に応じて液面レベル制御系のゲインを変更す
゛ることにより汽水ドラム内の圧力が広範囲に変化して
も汽水ドラムの液面レベルを安定化でき、運転員の労力
軽減が図れる。The present invention was made in consideration of the above circumstances, and includes a pressure detector that detects the pressure in a brackish water drum that stores steam evaporated by solar energy, and a pressure detector that detects the pressure in a brackish water drum that stores steam evaporated by solar energy. a functional calculator that performs calculations;
a level detector that detects the liquid level of the brackish water drum; a controller that receives a signal from the level detector and calculates an output signal to maintain the liquid level of the brackish water drum at a target value; The multiplier is equipped with a multiplier that receives the output signal of By changing the gain of the control system, the liquid level in the brackish water drum can be stabilized even if the pressure inside the brackish water drum changes over a wide range, and the labor of the operator can be reduced.
以下図面を参照して本発明の一実施例を説明する。An embodiment of the present invention will be described below with reference to the drawings.
第1図において、反射鏡によって集光された太陽エネル
ギ1は吸熱器の蒸発管2を加熱し蒸発管2内を流通する
水は加熱されて蒸発し汽水ドラム3に蒸気として貯えら
れることとなる。In Fig. 1, solar energy 1 concentrated by a reflecting mirror heats an evaporation tube 2 of a heat absorber, and water flowing through the evaporation tube 2 is heated and evaporated, and is stored as steam in a brackish water drum 3. .
蓄えられた蒸気は蒸気管4から蒸気流量調節弁12を経
由して例えば発電タービンや蓄熱器である圧力水タンク
等の負荷に供給されることとなる。The stored steam is supplied from the steam pipe 4 via the steam flow rate control valve 12 to a load such as a power generation turbine or a pressure water tank serving as a heat storage device.
この負荷に供給される蒸気の流量調整は、汽水ドラム3
内の圧力を所定範囲に保つ様に制御することによって行
なう。The flow rate adjustment of the steam supplied to this load is performed by the brackish water drum 3.
This is done by controlling the internal pressure to maintain it within a predetermined range.
即ち、汽水ドラム3の圧力を蒸気管4に介装した圧力検
出器7にて検出し、この検出信号を圧力調節計14に入
力し、この調節計14は所定の目標値と一致する様な操
作信号を蒸気流量調節計13の設定値として与える。That is, the pressure in the brackish water drum 3 is detected by the pressure detector 7 installed in the steam pipe 4, and this detection signal is input to the pressure regulator 14, which adjusts the pressure so that it matches a predetermined target value. The operation signal is given as a set value to the steam flow rate controller 13.
次に、調節計13はこの設定値と負荷に供給される蒸気
流量を検出する検出器11の出力値が等しくなる様に蒸
気流量調節弁12の開度を操作する信号を蒸気流量調節
弁12に出力する。Next, the controller 13 sends a signal to the steam flow rate control valve 12 to manipulate the opening degree of the steam flow rate control valve 12 so that this set value and the output value of the detector 11 that detects the steam flow rate supplied to the load become equal. Output to.
以上のようにして負荷に供給される蒸気流量は調整され
ることとなるが、他方これに応じて汽水ドラム3の液面
レベルを一定に保つべく供給水を汽水ドラム3に供給す
る必要がある。As described above, the flow rate of steam supplied to the load is adjusted, but on the other hand, it is necessary to supply water to the brackish water drum 3 in order to keep the liquid level in the brackish water drum 3 constant. .
そのためにハ汽水ドラム3の液面レベルをレベル検出器
5にて検出し、この信号を受けてレベル調節計6は操作
信号を算出しこれを乗算器9に入力する、他方この乗算
器9には圧力検出器7に接がれた関数演算器8(比率係
数器でも良い)の出力信号が入力されている。For this purpose, the level detector 5 detects the liquid level of the brackish water drum 3, and upon receiving this signal, the level controller 6 calculates an operation signal and inputs it to the multiplier 9. An output signal from a function calculator 8 (or a ratio coefficient calculator) connected to the pressure detector 7 is input.
上記2つの入力信号により乗算器9から出力される汽水
ドラム3の液面レベル調節信号は調節弁10に伝えられ
、調節弁10は乗算器9から入力された汽水ドラム3の
液面レベル調節信号に応じてその弁開度が制御される。The liquid level adjustment signal of the brackish water drum 3 outputted from the multiplier 9 based on the above two input signals is transmitted to the control valve 10, and the control valve 10 receives the liquid level adjustment signal of the brackish water drum 3 inputted from the multiplier 9. The valve opening degree is controlled accordingly.
すなわち、レベル検出器5、調節計6、乗算器9、調節
弁10からなる汽水ドラム3の液面レベル制御系のルー
プゲインが汽水ドラム圧力に応じて変化する様になって
いる。That is, the loop gain of the liquid level control system for the brackish water drum 3, which is composed of the level detector 5, the controller 6, the multiplier 9, and the control valve 10, is changed in accordance with the brackish water drum pressure.
今、例として50KW発電プラントの場合の関数演算器
8の出力特性を第2図に示す。Now, as an example, the output characteristics of the function calculator 8 in the case of a 50KW power generation plant are shown in FIG.
第2図は横軸に圧力検出器7で検出される汽水ドラム内
の圧力を、縦軸には関数演算器8の出力を各々とったも
ので、その出力特性は汽水ドラム3内の圧力が高まるに
つれて関数演算器8の出力は大きくなる即ち、汽水ドラ
ム3の液面レベル制御系のゲインは増大する様になって
いる。In Fig. 2, the horizontal axis shows the pressure inside the brackish water drum detected by the pressure detector 7, and the vertical axis shows the output of the function calculator 8.The output characteristics indicate that the pressure inside the brackish water drum 3 is As the water level increases, the output of the function calculator 8 increases, that is, the gain of the liquid level control system of the brackish water drum 3 increases.
次に第1図の様に構成された装置の作用を第2図により
説明する。Next, the operation of the apparatus constructed as shown in FIG. 1 will be explained with reference to FIG.
今、汽水ドラム3内の圧力の目標値が4.5 kg/c
rAGとなるように運転しているとすると、関数演算器
8の出力は48%であり、この信号で調節計6の出力は
補正され(ループゲインは補正され)はぼ最適な制御条
件下で運転される。Now, the target value of the pressure inside the brackish water drum 3 is 4.5 kg/c.
Assuming that the operation is performed so that rAG is achieved, the output of the function calculator 8 is 48%, and the output of the controller 6 is corrected by this signal (the loop gain is corrected), and under the optimal control conditions. be driven.
この状態で何らかの外乱、例えば負荷へ供給する蒸気量
が減少した場合には汽水ドラム3の2液面レベルは増大
気味となるので調節計6の出力は減少する。In this state, if some disturbance occurs, for example, if the amount of steam supplied to the load decreases, the level of the two liquids in the brackish water drum 3 tends to increase, and the output of the controller 6 decreases.
よって、乗算器9の出力、さらには調節弁10の開度も
減少し供給水量は絞られて、汽水ドラム3の液面レベル
の増大は抑制されることとなる。Therefore, the output of the multiplier 9 and further the opening degree of the control valve 10 are reduced, the amount of water to be supplied is reduced, and an increase in the liquid level of the brackish water drum 3 is suppressed.
また上記とは逆に蒸気流量が増大して;汽水ドラム3の
液面レベルが低下した場合には上述と同様の作用により
汽水ドラムへの供給水量は増やされて汽水ドラム3の液
面レベルの低下は抑制される。Also, contrary to the above, when the steam flow rate increases and the liquid level in the brackish water drum 3 decreases, the amount of water supplied to the brackish water drum is increased by the same effect as described above, and the liquid level in the brackish water drum 3 decreases. The decline is suppressed.
以上の様な作用により汽水ドラム3内圧力の目標値4.
5 kg/crttG近傍では汽水ドラムの・液面レベ
ル制御は安定して行われる。Due to the above-mentioned actions, the target value 4 of the internal pressure of the brackish water drum 3.
At around 5 kg/crttG, liquid level control of the brackish water drum is performed stably.
ここで汽水ドラム3内の圧力の目標値が8kg/crr
tGで運転される場合に移行したとする。Here, the target value of the pressure inside the brackish water drum 3 is 8 kg/crr.
Assume that the transition occurs when the vehicle is operated at tG.
この場合関数演算器8の出力は63%でありこの信号で
調節計6の出力は補正されることとなる。In this case, the output of the function calculator 8 is 63%, and the output of the controller 6 is corrected with this signal.
即ち目標値’ 5に!?/ca’Gの状態から8 kg
/crttGの状態に移行したことに応じてプロセス特
性も異なったことを考慮しそれに応じて調節計のゲイン
を上げほぼ最適な制御条件を自動的に設定できる。In other words, the target value is '5! ? 8 kg from /ca'G state
Considering that the process characteristics have changed due to the transition to the /crttG state, the gain of the controller can be increased accordingly, and almost optimal control conditions can be automatically set.
この条件下で外乱が入った場合はその他の機器は4.5
kg/cyyiGの目標値で運転されている時と同様
の作用をし安定した汽水ドラム3の液面レベル制御を達
成できる。If a disturbance occurs under these conditions, other equipment will be rated at 4.5
The same effect as when operating at the target value of kg/cyyiG is achieved, and stable liquid level control of the brackish water drum 3 can be achieved.
以上述べたように本発明によれば、汽水ドラム内の圧力
が広範囲に変化する場合にも汽水ドラムの液面レベルの
安定した制御ができ、運転員の労力軽減が図れる。As described above, according to the present invention, the liquid level in the brackish water drum can be stably controlled even when the pressure inside the brackish water drum changes over a wide range, and the labor of the operator can be reduced.
第1図および第2図は本発明の一実施例を示し、第1図
は図式系統図、第2図は汽水ドラム圧力と関数演算器の
出力との関係を示す線図である。
1・・・・・・太陽エネルギ、3・・・・・・汽水ドラ
ム、7・・・・・・圧力検出器、8・・・・・・関数演
算器、5・・・・・・レベル検出器、6・・−・・・調
節計、9・・・・・・乗算器。1 and 2 show an embodiment of the present invention, FIG. 1 is a diagrammatic system diagram, and FIG. 2 is a diagram showing the relationship between the brackish water drum pressure and the output of the function calculator. 1... Solar energy, 3... Brackish water drum, 7... Pressure detector, 8... Function calculator, 5... Level Detector, 6...controller, 9...multiplier.
Claims (1)
汽水ドラム内の圧力を検出する圧力検出器と、この圧力
検出器により検出された圧力に応じて演算を行なう関数
演算器と、上記汽水ドラムの液面レベルを検出するレベ
ル検出器と、このレベル検出器からの信号を受けて、該
汽水ドラムの液面レベルを目標値に保つべく出力信号を
算出する調節計と、この調節計よりの出力信号と上記関
数演算器よりの出力信号とを受けて汽水ドラムの液面レ
ベル調節信号を発生する乗算器とを具備してなる太陽熱
利用設備の汽水ドラムにおける液面レベル制御装置。1. A pressure detector that detects the pressure in the brackish water drum that stores steam evaporated by solar energy, a function calculator that performs calculations according to the pressure detected by the pressure detector, and a liquid level of the brackish water drum. A level detector that detects the level, a controller that receives the signal from the level detector and calculates an output signal to maintain the liquid level of the brackish water drum at the target value, and an output signal from the controller. A liquid level control device in a brackish water drum of a solar heat utilization facility, comprising a multiplier that receives an output signal from the above-mentioned functional calculator and generates a liquid level adjustment signal for the brackish water drum.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54144482A JPS5816109B2 (en) | 1979-11-09 | 1979-11-09 | Liquid level control device for brackish water drum in solar thermal utilization equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP54144482A JPS5816109B2 (en) | 1979-11-09 | 1979-11-09 | Liquid level control device for brackish water drum in solar thermal utilization equipment |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5668704A JPS5668704A (en) | 1981-06-09 |
JPS5816109B2 true JPS5816109B2 (en) | 1983-03-29 |
Family
ID=15363332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP54144482A Expired JPS5816109B2 (en) | 1979-11-09 | 1979-11-09 | Liquid level control device for brackish water drum in solar thermal utilization equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5816109B2 (en) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5392002A (en) * | 1977-01-22 | 1978-08-12 | Ebara Corp | Control method for water-level in boiler and its device |
-
1979
- 1979-11-09 JP JP54144482A patent/JPS5816109B2/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5392002A (en) * | 1977-01-22 | 1978-08-12 | Ebara Corp | Control method for water-level in boiler and its device |
Also Published As
Publication number | Publication date |
---|---|
JPS5668704A (en) | 1981-06-09 |
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