JPS6357803B2 - - Google Patents
Info
- Publication number
- JPS6357803B2 JPS6357803B2 JP57105469A JP10546982A JPS6357803B2 JP S6357803 B2 JPS6357803 B2 JP S6357803B2 JP 57105469 A JP57105469 A JP 57105469A JP 10546982 A JP10546982 A JP 10546982A JP S6357803 B2 JPS6357803 B2 JP S6357803B2
- Authority
- JP
- Japan
- Prior art keywords
- heat medium
- heat
- flow rate
- temperature
- outlet temperature
- 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
- 230000005855 radiation Effects 0.000 claims description 14
- 238000010586 diagram Methods 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/1919—Control of temperature characterised by the use of electric means characterised by the type of controller
- G05D23/1924—Control of temperature characterised by the use of electric means characterised by the type of controller using thermal energy, the availability of which is aleatory
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Control Of Temperature (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は太陽熱集熱装置の熱媒体温度制御装置
に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a heat medium temperature control device for a solar heat collector.
一般に太陽熱利用プラントでは、第１図に示す
ように、集熱装置１と熱利用設備２との間に熱媒
体３を循環させることにより、集光部１ａ、赤外
線吸収体１ｂ、熱媒体配管１ｃを通して集熱装置
１で集収した熱を熱利用設備２で利用している。
このようなプラントにおいて、熱利用設備２を効
率よく運転するには、集熱装置１の熱媒体出口温
度を設定値通りに制御する必要がある。このため
従来はその出口温度と出口温度設定値の偏差を
PID（比例、積分、微分）演算し、この結果を用
いて熱媒体流量を調節していた。
Generally, in a solar heat utilization plant, as shown in FIG. The heat collected by the heat collecting device 1 through the heat collecting device 1 is utilized by the heat utilization equipment 2.
In such a plant, in order to operate the heat utilization equipment 2 efficiently, it is necessary to control the heat medium outlet temperature of the heat collection device 1 according to a set value. For this reason, in the past, the deviation between the outlet temperature and the outlet temperature set value was
PID (proportional, integral, differential) calculations were performed and the results were used to adjust the heat medium flow rate.
しかし、集熱装置１は大きな熱容量を持つた
め、日射量が変化してから熱媒体出口温度が変化
するまでに大きな時間遅れがある。このため、上
記従来方式によると、激しく変化する日射量に対
して熱媒体出口温度を精度良く制御できない問題
点があつた。
However, since the heat collecting device 1 has a large heat capacity, there is a large time delay between when the amount of solar radiation changes and when the heat medium outlet temperature changes. For this reason, the conventional method described above has a problem in that it is not possible to precisely control the heat medium outlet temperature in response to rapidly changing solar radiation.
本発明は日射量が激しく変化しても熱媒体出口
温度を精度良く制御できる太陽熱集熱装置の熱媒
体温度制御装置を提供することを目的とする。
SUMMARY OF THE INVENTION An object of the present invention is to provide a heat medium temperature control device for a solar heat collector that can accurately control the heat medium outlet temperature even if the amount of solar radiation changes drastically.
この目的を達成するため、本発明は日射計を設
けて日射量を検出し、これから熱媒体出口温度を
設定値に保つのに必要な熱媒体流量を予測計算す
る一方、その予測誤差を熱媒体出口温度とその出
口温度設定値との偏差から補正し、補正した予測
値で熱媒体流量を制御するようにしたことを特徴
とする。
In order to achieve this objective, the present invention installs a pyranometer to detect the amount of solar radiation, predicts and calculates the heat medium flow rate required to maintain the heat medium outlet temperature at a set value, and calculates the prediction error by detecting the amount of solar radiation. The present invention is characterized in that the deviation between the outlet temperature and the outlet temperature set value is corrected, and the heat medium flow rate is controlled using the corrected predicted value.
以下、本発明を図面に示す実施例を参照して説
明する。
The present invention will be described below with reference to embodiments shown in the drawings.
第２図は本発明の一実施例に係わる熱媒体温度
制御装置の構成図を示したもので、１１は集熱装
置、１２は熱媒体流量調整装置、１３は集熱装置
出口での熱媒体温度検出器、１４は集熱装置入口
での熱媒体温度検出器、１５は熱媒体の流量検出
器、１６は日射検出器、１７はデイジタル制御装
置である。 FIG. 2 shows a configuration diagram of a heat medium temperature control device according to an embodiment of the present invention, in which 11 is a heat collection device, 12 is a heat medium flow rate adjustment device, and 13 is a heat medium at the exit of the heat collection device. 14 is a heat medium temperature detector at the inlet of the heat collecting device; 15 is a heat medium flow rate detector; 16 is a solar radiation detector; and 17 is a digital control device.
今、集熱装置１１で太陽光を集めて得られる熱
量をＱ〔kcal／sec〕とし、集熱装置１１の熱媒体
流量をＧ〔Kg／sec〕、熱媒体の比熱をＫ〔kcal／
ssec〕、集熱装置入口と出口の熱媒体温度を各々
ｃ、ａ〔℃〕とすると、これらの量の間には次式
の関係が成立する。 Now, let the amount of heat obtained by collecting sunlight in the heat collecting device 11 be Q [kcal/sec], the heat medium flow rate of the heat collecting device 11 be G [Kg/sec], and the specific heat of the heat medium be K [kcal/sec].
ssec], and the heat medium temperatures at the inlet and outlet of the heat collector are c and a [°C], respectively, and the following relationship holds between these quantities.
ａ−ｃ＝Ｑ／Ｇ×Ｋ …(1)
このことから、集熱装置出口の熱媒体温度ａを
設定値ｅ〔℃〕にするための熱媒体流量予測値ｆ
は次式で表わすことができる。 a-c=Q/G×K...(1) From this, the predicted heat medium flow rate f to set the heat medium temperature a at the outlet of the heat collector to the set value e [℃]
can be expressed by the following equation.
ｆ＝Ｑ／（ｅ−ｃ）×Ｋ …(2)
一方、集熱装置１１に流入する熱量Ｑは、日射
量をｂ〔Kcal／m2〕、集熱効率をη、受光面積を
ｓ〔m2〕とすると、次式で表わすことができる。 f=Q/(e-c)×K...(2) On the other hand, the amount of heat Q flowing into the heat collecting device 11 is determined by the amount of solar radiation b [Kcal/m 2 ], the heat collection efficiency η, and the light receiving area s [m 2 ]. 2 ], it can be expressed by the following equation.
Ｑ＝ｂ×ｓ×η …(3)
そこで、先ず集熱装置１１に流入する熱量Ｑを
求めるため、デイジタル制御装置１７は第３図に
示すように、日射量検出器１６から得られる日射
量ｂと予め設計段階で得られる集熱効率ηおよび
受光面積ｓとを基に演算回路１８で(3)式を演算す
る。次に、その求めた熱量Ｑと熱媒体温度検出器
１４から得られる集熱装置入口の熱媒体温度ｃと
設定値ｅおよび熱媒体比熱Ｋとを用いて演算回路
１９で(2)式の演算を行ない、熱媒体流量予測値ｆ
を算出する。 Q=b×s×η (3) Therefore, in order to first obtain the amount of heat Q flowing into the heat collecting device 11, the digital controller 17 calculates the amount of solar radiation obtained from the amount of solar radiation detector 16, as shown in FIG. The calculation circuit 18 calculates equation (3) based on b, the heat collection efficiency η, and the light receiving area s obtained in advance at the design stage. Next, the arithmetic circuit 19 calculates equation (2) using the calculated heat amount Q, the heat medium temperature c at the inlet of the heat collector obtained from the heat medium temperature detector 14, the set value e, and the heat medium specific heat K. The predicted heat medium flow rate f
Calculate.
理論上はこの熱媒体流量予測値ｆに基づき熱媒
体流量を調整すれば、集熱装置１１の熱媒体出口
温度を設定値ｅに等しく制御できる訳であるが、
実際には検出器の誤差や経年変化による集熱効率
の変化等により、熱媒体流量予測値ｆに多少の誤
差が生じる。 Theoretically, if the heat medium flow rate is adjusted based on this heat medium flow rate predicted value f, the heat medium outlet temperature of the heat collecting device 11 can be controlled to be equal to the set value e.
In reality, some errors occur in the predicted heat medium flow rate f due to detector errors, changes in heat collection efficiency due to aging, and the like.
この予測誤差Δfを補正するため、デイジタル
制御装置１７は熱媒体温度検出器１３から得られ
る熱媒体出口温度ａと設定値ｅの偏差ｇをとり、
演算回路２０でPID演算を行う。更に、その演算
結果ｈを演算回路２１で熱媒体流量予測値ｆに加
えて誤差分を補正し、正しい予測値ｉを算出す
る。 In order to correct this prediction error Δf, the digital control device 17 takes the deviation g between the heat medium outlet temperature a obtained from the heat medium temperature detector 13 and the set value e, and
The calculation circuit 20 performs PID calculation. Further, the calculation result h is added to the heat medium flow rate predicted value f in the calculation circuit 21, and the error is corrected to calculate a correct predicted value i.
熱媒体流量調整装置１２では、この予測値ｉを
指令値として流量検出器１５から得られる熱媒体
流量ｄを予測値ｉに一致させるように流量調節す
る。 The heat medium flow rate adjustment device 12 uses this predicted value i as a command value to adjust the flow rate so that the heat medium flow rate d obtained from the flow rate detector 15 matches the predicted value i.
このような制御を行なうことにより、集熱装置
１１が大きな熱容量を有していても、日射量の変
化によらず集熱装置１１の熱媒体出口温度ａを設
定値通りに精度良く制御することができ、熱利用
設備を効率よく稼動できるようになる。 By performing such control, even if the heat collecting device 11 has a large heat capacity, the heat medium outlet temperature a of the heat collecting device 11 can be accurately controlled to the set value regardless of changes in the amount of solar radiation. This enables efficient operation of heat utilization equipment.
尚、熱媒体流量調整装置１２は流量調節弁のみ
とし、流量検出器１５の検出値ｄをデイジタル制
御装置１７に加えて補正予測値ｉとの差を取り、
これを操作指令としてその流量調節弁に加えるよ
うにしてもよい。 Note that the heat medium flow rate adjustment device 12 is only a flow rate control valve, and the detected value d of the flow rate detector 15 is added to the digital control device 17, and the difference between it and the corrected predicted value i is calculated.
This may be applied to the flow control valve as an operation command.
以上のように本発明によれば、熱容量が大き
く、日射量の変化が熱媒体出口温度の変化となつ
て表われるまで大きな時間遅れがある集熱装置に
対して、その出口温度を日射量の激しい変化にも
かかわらず設定値通りに精度良く制御できる太陽
熱集熱装置の熱媒体温度制御装置が得られる。
As described above, according to the present invention, for a heat collecting device that has a large heat capacity and has a long time delay until a change in solar radiation appears as a change in the heat medium outlet temperature, the outlet temperature can be adjusted according to the solar radiation. It is possible to obtain a heat medium temperature control device for a solar heat collector that can accurately control the set value in spite of severe changes.
第１図は太陽熱利用プラントの一般的な説明
図、第２図は本発明の一実施例を示す太陽熱集熱
装置熱媒体温度制御装置のブロツク構成図、第３
図は第２図のデイジタル制御装置の細部ブロツク
構成図である。
１，１１…集熱装置、１ａ…集光部、１ｂ…赤
外線吸収体、１ｃ…熱媒体配管、２…熱利用設
備、１２…熱媒体流量調整装置、１３，１４…熱
媒体温度検出器、１５…流量検出器、１６…日射
量検出器、１７…デイジタル制御装置、１８，１
９，２０，２１…演算回路。
Fig. 1 is a general explanatory diagram of a solar heat utilization plant, Fig. 2 is a block configuration diagram of a solar heat collector and heat medium temperature control device showing an embodiment of the present invention, and Fig. 3
This figure is a detailed block diagram of the digital control device shown in FIG. 2. DESCRIPTION OF SYMBOLS 1, 11... Heat collection device, 1a... Light collecting part, 1b... Infrared absorber, 1c... Heat medium piping, 2... Heat utilization equipment, 12... Heat medium flow rate adjustment device, 13, 14... Heat medium temperature detector, 15...Flow rate detector, 16...Solar radiation detector, 17...Digital control device, 18,1
9, 20, 21... Arithmetic circuit.
Claims (1)
出口温度を設定値通りに制御する温度制御装置に
おいて、少なくとも熱媒体入口温度と日射量とか
ら、熱媒体出口温度を設定温度にすべき熱媒体流
量予測値を算出する演算手段と、熱媒体出口温度
と設定値との差を算出し、前記熱媒体流量予測値
の予測誤差を補正する演算手段とを備え、得られ
る結果で熱媒体流量を調節することにより、熱媒
体出口流量を設定値通りに制御することを特徴と
する太陽熱集熱装置の温度制御装置。1. In a temperature control device that controls the outlet temperature of a heat medium passing through a solar heat collecting device according to a set value, the heat medium outlet temperature should be set to the set temperature based on at least the heat medium inlet temperature and the amount of solar radiation. A calculation means for calculating a predicted flow rate value, and a calculation means for calculating a difference between a heat medium outlet temperature and a set value and correcting a prediction error of the predicted heat medium flow rate value, and calculates a heat medium flow rate based on the obtained result. 1. A temperature control device for a solar heat collecting device, which controls a heat medium outlet flow rate according to a set value by adjusting the temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57105469A JPS58222317A (en) | 1982-06-21 | 1982-06-21 | Temperature controller of solar heat collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57105469A JPS58222317A (en) | 1982-06-21 | 1982-06-21 | Temperature controller of solar heat collector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58222317A JPS58222317A (en) | 1983-12-24 |
| JPS6357803B2 true JPS6357803B2 (en) | 1988-11-14 |
Family
ID=14408440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57105469A Granted JPS58222317A (en) | 1982-06-21 | 1982-06-21 | Temperature controller of solar heat collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58222317A (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0621539Y2 (en) * | 1986-07-17 | 1994-06-08 | 株式会社笹倉機械製作所 | Desalination equipment using solar heat |
| JPH02123408A (en) * | 1988-11-02 | 1990-05-10 | Rinnai Corp | Temperature controller for heater |
| JP5191645B2 (en) * | 2006-10-18 | 2013-05-08 | タマティーエルオー株式会社 | Thermoelectric solar cell system |
| CN106500370B (en) * | 2015-09-08 | 2018-12-07 | 北京兆阳光热技术有限公司 | A kind of the water supply amount control method and its system of photo-thermal power station heat collector |
| CN106500369B (en) * | 2015-09-08 | 2018-12-07 | 北京兆阳光热技术有限公司 | The control method and its system of the heat transferring medium supply amount of photo-thermal power station heat collector |
| CN106705460B (en) * | 2015-11-16 | 2019-08-16 | 北京兆阳光热技术有限公司 | A kind of control method of the heat transferring medium supply amount of photo-thermal power station heat collector |
-
1982
- 1982-06-21 JP JP57105469A patent/JPS58222317A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58222317A (en) | 1983-12-24 |
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