JP6033674B2 - Heat supply control device, heat supply system, and heat supply control method - Google Patents

Description

  The present invention controls the number of rotations of a pump for supplying cold / hot water generated by a plurality of heat supply plants to a plurality of demand buildings, and can supply a necessary amount of cold / hot water to each demand building with a minimum power. The present invention relates to a system and a control method thereof.

  In a conventional heat supply system that transports cold / hot water using a district heating / cooling device, etc., the technology described in Patent Document 1 uses the minimum necessary power when transporting heat produced in one place (heat production plant). The present invention provides a water supply control system and a control method thereof that can efficiently deliver heat to a plurality of heat exchangers. Specifically, among the heat exchangers that require the most circulating head, compare the preset differential pressure (optimum differential pressure) with the measured valve + heat exchanger differential pressure. Thus, a water supply control system capable of transporting heat with a minimum necessary pump discharge pressure is provided by searching and specifying the inverter and controlling the rotation speed of the pump according to the heat exchanger.

JP 2011-242057 A

  According to the technique described in Patent Document 1, when there is one heat supply plant, the heat exchanger that most requires the circulation head is identified as needed, and the valve opening of the identified heat exchanger is maximum. By controlling the pump rotation speed of the supply plant, heat is transferred with the minimum necessary pump power. However, when there are multiple supply plants, pumps of all supply plants increase or decrease the number of rotations according to the specified valve opening. Heat cannot be transferred with minimum power.

  Therefore, an object of the present invention is to provide a heat supply system and method for reducing the total power consumption of the pumps of each supply plant in a system composed of a plurality of plants and a plurality of consumers.

  The present invention relates to a heat source device that generates a heat medium such as cold / hot water and a plurality of heat supply plants including a pump that conveys the heat medium, heat utilization equipment such as an air conditioner, a heat exchanger, and a heat medium from the plant. In a heat supply system that sends a heat medium through a heat pipe to a plurality of customer buildings equipped with valves for adjusting the flow rate of the air, and the customer buildings use for air conditioning, etc., satisfy the heat demand of each customer building, Calculate the rotation speed and flow rate of the pump so that the power consumption of the pump that transports the medium is minimized, and use the calculated flow rate and the power consumption characteristics of the pump according to the valve opening in the customer's building. Select the pump that controls the rotation speed.

  According to the present invention, in a system composed of a plurality of plants and a plurality of consumers, it becomes possible to reduce the total power consumption of the pumps of each supply plant.

It is a figure showing the whole heat supply system composition concerning an embodiment of the present invention. 3 is a processing flow diagram of the piping network control device 300. FIG. It is a processing flow figure of pump power consumption minimization processing S302. FIG. 10 is a processing flowchart of pump / valve selection processing S303. It is a figure which shows a mode that the variation | change_quantity of power consumption changes with the flow volume and rotation speed of a pump. It is a processing flow figure of pump control system distribution processing S304. FIG. 5 is a process flow diagram of the pump control apparatus 103. FIG. 5 is a processing flowchart of the valve control device 211. FIG. 10 is a process flow diagram of the piping network control apparatus 300 having a function of controlling the execution timing of the pump power consumption minimization process S302. It is a process flow figure of processing S305 which carries out execution judgment based on time. It is a process flow figure of processing S305 to carry out judging based on change of flow. It is a figure showing the whole heat supply system composition about an embodiment provided with a central control unit.

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.
<First embodiment>
FIG. 1 shows a configuration example of the heat supply system. This system includes a plurality of heat supply plants 100 having heat source devices such as refrigerators and boilers, a customer building 200 such as an office building, a commercial facility or a factory, a heat pipe network controller 300, and a heat supply plant 100. And a customer building 200, and a heat pipe network 400 for conveying a heat supply medium such as cold water or hot water, and a wired or wireless communication line 500 are provided.

  The heat supply plant 100 includes a heat source device 101 such as a boiler or a refrigerator that generates cold / hot water, and a pump 102 for conveying the heat supply medium generated by the heat source device 101 to each customer building through the heat pipe network 400. And a pump control device 103 for controlling the pump 102. The processing flow of the pump control device 103 will be described later with reference to FIG.

  The customer building 200 includes a heat utilization device 201 such as an air conditioner, a heat exchanger 202 that performs heat transfer in order to use the heat of the heat supply medium sent from the heat supply plant in the heat utilization device 201, and heat exchange. The valve 203 for adjusting the flow rate on the primary side of the heat exchanger 202, the temperature sensor 204 for measuring the temperature T at the outlet on the primary side of the heat exchanger 202, and the heat amount obtained through the heat exchanger 202 are used as heat A pump 206 for conveying to the device 201, a valve 207 for adjusting the flow rate on the secondary side of the heat exchanger 202 according to the amount of heat required by the heat utilization device 201, and an inlet temperature Ts of the heat utilization device 201 A temperature sensor 208 for measuring the temperature, a temperature sensor 209 for measuring the outlet temperature Tr of the heat utilization device 201, a flow sensor 210 for measuring the flow rate F to the heat utilization device 201, and the values of each temperature sensor and flow rate. And a valve control device 211 for controlling the valve 203. The processing flow of the valve control device 211 will be described later with reference to FIG.

  The piping network control device 300 collects the measurement values of various sensors through the valve control device 211 of each customer building, so that the total power consumption of the pumps 102 installed in each heat supply plant is minimized. The rotational speed and flow rate of 102 and the opening degree of each valve 203 are calculated. Thereafter, the pump that is controlled according to the calculation result, the pump that changes the rotation speed following the opening degree of the valve 203 of the consumer building, and the valve 203 of the consumer building that is the follow-up destination are identified, and the pump control device 103 Send control signal to. The processing flow of the piping network control device 300 will be described later with reference to FIG.

  FIG. 2 shows an outline of the processing flow of the piping network control apparatus 300.

  In the heat exchanger primary side required flow rate calculation process of process S301, the heat exchange described in the temperature measurement values Ts, Tr, flow rate measurement value F collected via the valve control device 211 of each consumer building and the design document etc. Based on the temperature change information of the heat exchanger 202, the required flow rate on the primary side of the heat exchanger is calculated. In the process 301, first, the heat demand amount of the heat utilizing device is calculated based on the product of the difference between Ts and Tr and the flow rate F. Next, the required flow rate on the primary side of the heat exchanger is calculated based on the quotient obtained by dividing the heat demand amount of the heat utilization device by the temperature change information of the heat exchanger 202. The temperature change information of the heat exchanger 202 is information on the difference between the primary side inlet temperature and the outlet temperature in the heat exchanger, and is a value that can be set in advance from a specification or the like.

  In the pump power consumption minimization process of process S302, the power consumption of the pump 102 of each heat supply plant 100 to satisfy the required flow rate on the primary side of the heat exchanger 202 of each heat demand building 200 calculated in process S301. The rotational speed and flow rate of each pump 102 that minimizes the sum, and the opening degree of the valve 203 of each customer building 200 are calculated. A detailed flow of the process S302 will be described later with reference to FIG.

  In the pump / valve selection process of process S303, the calculated rotation based on the rotation speed of each pump 102 calculated in process S302, the flow rate of the pump 102 at that time, and the opening degree of the valve 203 of each customer building 200 A pump to be controlled in several ways and a combination of a pair of the pump 102 and the valve 203 that control the rotation speed of the pump 102 in accordance with the opening degree of the valve 203 are specified. A detailed flow of the process S303 will be described later with reference to FIG. When the pump rotation speed calculated in the pump power consumption minimization process is applied to all pumps and controlled, the heat exchange of each customer building is caused by the model error included in the pressure loss equation used in the pump power consumption minimization process. In some cases, the required flow rate cannot be supplied to the primary side of the vessel 202, or the required flow rate is supplied to the primary side with power consumption more than the minimum necessary. In step S303, a combination of a pump and a valve that controls the number of revolutions of the pump according to the opening of the valve is selected, and the other pumps are controlled to have the number of revolutions of the pump calculated in the pump power consumption minimization process. The model error included in the pressure loss equation used in the pump power consumption minimization process is compensated by the pump selected in process S303, and the total amount of power consumed by each customer building is reduced while minimizing the total power consumption of the pump. Can be supplied.

  In the pump control process of process S304, a control command is transmitted to each pump control apparatus 103. A detailed flow of the process S304 will be described later with reference to FIG. By repeatedly executing the processing from processing S301 to processing 304, the heat medium is transferred from each heat supply plant to each heat demand building.

  FIG. 3 shows a process flow of the pump power consumption minimization process of process S302. In this process, the required flow rate of the heat exchanger primary side of each customer building calculated in process S301, the pump 102 of each heat supply plant, the heat source unit 103, the heat pipe 400 connecting the heat supply plant and the customer building, Various characteristic information described in the design documents of the valve 203 and heat exchanger 202 of each customer building is input, the required flow rate on the primary side of the heat exchanger of each customer building is satisfied, and each heat supply plant's The number of rotations of each pump 102 for minimizing the total power consumption of the pump 102 and the valve opening of the valve 203 of each customer building are calculated. In the calculation, the total power consumption E of the pumps 102 of each heat supply plant is set as a function f (w) having the rotation speed w of the pumps 102 of each heat supply plant as a variable.

関数f(w) について、滑降シンプレックス法などの数値解析手法を用いて、各熱供給プラントのポンプ102の総消費電力Eが最小となる各熱供給プラントのポンプ102の回転数w を算出する。
以下、各熱供給プラントのポンプ102の回転数w を用いて各熱供給プラントのポンプ102の総消費電力Eを算出する処理及び、滑降シンプレックス法を用いたEを最小とする各熱供給プラントのポンプ102の回転数w を算出する処理について説明する。
処理S3021では、処理S3022で必要となる初期値として、各熱供給プラントのポンプ102の回転数の組合せを、ポンプ102の数＋１以上作成する。例えば、各ポンプの定格回転数を基準に作成する。
処理S3022では、各熱供給プラントと各需要家建物を繋ぐ熱配管400、熱源機101、熱交換器202、バルブ203の圧力損失式と、各熱供給プラントのポンプ102の揚程曲線式と、熱配管400の分岐・合流点の流量保存式とから成る非線形連立方程式を解く事で、各熱供給プラントのポンプ102の流量、吐出圧力、各需要家建物のバルブ203の開度を算出する。なお、処理S3021で作成した初期値の数だけ非線形連立方程式を解き、各熱供給プラントのポンプ102の流量、吐出圧力、各需要家建物のバルブ203の開度を算出する。
熱配管400、熱源機101及び熱交換器202の圧力損失式は次式（数２）で与えられる。

For the function f (w), the rotational speed w of the pump 102 of each heat supply plant that minimizes the total power consumption E of the pump 102 of each heat supply plant is calculated using a numerical analysis method such as the downhill simplex method.
Hereinafter, the process of calculating the total power consumption E of the pump 102 of each heat supply plant using the rotation speed w of the pump 102 of each heat supply plant, and each heat supply plant that minimizes E using the downhill simplex method A process for calculating the rotation speed w of the pump 102 will be described.
In the process S3021, as the initial value required in the process S3022, a combination of the rotation speeds of the pumps 102 of each heat supply plant is created by the number of the pumps +1 or more. For example, it creates based on the rated rotation speed of each pump.
In the process S3022, the heat pipe 400, the heat source device 101, the heat exchanger 202, the valve 203 pressure loss equation of each heat supply plant and each customer building, the lift curve equation of the pump 102 of each heat supply plant, and the heat By solving a nonlinear simultaneous equation consisting of a flow rate conserving equation at the branching / merging point of the pipe 400, the flow rate of the pump 102 in each heat supply plant, the discharge pressure, and the opening degree of the valve 203 in each customer building are calculated. Note that the nonlinear simultaneous equations are solved by the number of initial values created in the process S3021, and the flow rate and discharge pressure of the pump 102 of each heat supply plant and the opening degree of the valve 203 of each customer building are calculated.
The pressure loss equations for the heat pipe 400, the heat source device 101, and the heat exchanger 202 are given by the following equation (Equation 2).

バルブの圧力損失式は次式（数３）で与えられる。

The valve pressure loss equation is given by the following equation (Equation 3).

ポンプの揚程曲線は次式（式４）で与えられる。

The pump head curve is given by the following equation (Equation 4).

熱配管の分岐点、合流点の流量保存式は次式（数５）で与えられる。

The flow rate conservation formula at the branch point and junction of the thermal piping is given by the following formula (Equation 5).

左辺第一項は、分岐・合流点における各熱配管からの流入量の合計であり、左辺第二項は、分岐・合流点における各熱配管からの流出量の合計である。

The first term on the left side is the total amount of inflow from each thermal pipe at the branching / merging point, and the second term on the left side is the total amount of outflow from each thermal pipe at the branching / merging point.

  The flow rate conservation formula at the branching / merging point to which the heat exchanger 202 is connected is given by the following formula (Equation 6).

ここで、左辺は、熱交換器202への流入量の合計であり、左辺Qdemandは処理S301で算出した熱交換器1次側の必要流量である。

Here, the left side is the total amount of inflow into the heat exchanger 202, and the left side Qdemand is the required flow rate on the primary side of the heat exchanger calculated in step S301.

  By solving simultaneous equations consisting of Equations 2 to 6 using approximate release such as Newton's method, the flow rate and discharge pressure of the pump 102 of each heat supply plant with respect to the rotational speed w of the pump 102 of each heat supply plant, The valve opening of the valve 203 of each customer building is calculated.

  In process S3023, the total energy consumption of the pump is calculated using the rotation speed w of each pump used in process S3022, the flow rate and discharge pressure of each pump calculated in process S3022. The total energy consumption value is calculated by the number of initial values created in step S3021. The total energy consumption formula of the pump is given by the following equation (Equation 7).

ポンプ効率は次式（数８）で与えられる。

The pump efficiency is given by the following equation (Equation 8).

処理S3022、処理S3023により、各熱供給プラントのポンプ102の回転数w に対して、各熱供給プラントのポンプ102の総消費電力Eを算出できる。
処理S3024では、直前の処理3023で算出した総消費エネルギーの最小値と、前回の総消費エネルギーの最小値を比較し、差分が予め設定しておいた値以内の場合、処理を終了する。差分が予め設定しておいた値以上の場合、処理S3025に進む。処理S3025では、処理3026による処理の実施回数が予め設定しておいた回数以上実施されているかどうかを判定する。処理3026による処理の実施回数が予め設定しておいた回数以上の場合、処理を終了する。処理3026による処理の実施回数が予め設定しておいた回数以下の場合、処理3026に進む。処理3026では、処理3022で用いた各熱供給プラントのポンプ102の回転数の組合せを更新し、処理S3022に進む。各熱供給プラントのポンプ102の回転数の組合せの更新処理ロジックは、滑降シンプレックス法における手順に基づいて更新する。これらの処理により、Eを最小とする各熱供給プラントのポンプ102の回転数w を算出できる。

By processing S3022 and S3023, the total power consumption E of the pump 102 of each heat supply plant can be calculated with respect to the rotation speed w of the pump 102 of each heat supply plant.
In the process S3024, the minimum value of the total energy consumption calculated in the immediately preceding process 3023 is compared with the previous minimum value of the total energy consumption, and if the difference is within a preset value, the process ends. If the difference is greater than or equal to a preset value, the process proceeds to step S3025. In process S3025, it is determined whether or not the number of executions of the process 3026 has been performed more than a preset number. If the number of executions of the process 3026 is greater than or equal to the preset number, the process ends. If the number of executions of the process 3026 is equal to or less than the preset number, the process 3026 is performed. In process 3026, the combination of the rotation speeds of the pumps 102 of each heat supply plant used in process 3022 is updated, and the process proceeds to process S3022. The update processing logic of the combination of the rotation speeds of the pumps 102 of each heat supply plant is updated based on the procedure in the downhill simplex method. By these processes, the rotation speed w of the pump 102 of each heat supply plant that minimizes E can be calculated.

FIG. 4 shows a process flow of the pump / valve selection process in process S303.
In the process S3031, the valve with the maximum opening is selected from the valves 203 of each customer building calculated in the pump power consumption minimization process in the process S302.
In the process S3032, for the pump 102 of each heat supply plant, a pump with a small increase in power consumption is selected with respect to a predetermined increase in the number of rotations using the performance information and the pump flow rate calculated in the process 302. . FIG. 5 shows a state in which the amount of increase in power consumption with respect to increase in the number of rotations varies depending on the flow rate of the pump. Pattern 1 represents a change in pump power consumption when the pump rotation speed is increased with respect to the flow rates of pump A and pump B calculated in the pump power consumption minimization process in process S302 for a certain demand amount. In pattern 1, the pump B has a smaller increase in power consumption due to the increase in pump rotation speed, and therefore the pump B is selected in step S3031. Pattern 2 represents a change in pump power consumption when the pump rotation speed is increased for the flow rates of pump A and pump B calculated in the pump power consumption minimization process in process S302 for a demand different from pattern 2. In pattern 2, the pump A has a smaller increase in power consumption due to the increase in pump rotation speed, so the pump A is selected in step S3031. As described above, since the amount of increase in power consumption varies depending on the pump flow rate, a process S3031 for selecting an appropriate pump according to the result of the pump power consumption minimization process in process S302 is required.

  By selecting a pump with a small increase in power consumption with respect to the increase in rotation speed in process S3032, the power consumption that increases due to the pump operating at a rotation speed different from the pump power consumption minimization processing result is minimized. . As a result, an increase in the total power consumption of the pump can be minimized, and heat can be supplied with a total power consumption closer to the pump power consumption minimization processing result.

FIG. 6 shows a process flow of the pump control process in process S304.
In step S3041, a pump selection notification and the opening degree of the selected valve are transmitted to the pump control device 103 that controls the pump 102 selected in step S303.
In process S3042, the rotation speed of each pump 102 calculated in process S302 is transmitted to each pump control apparatus 103 that controls the other pumps 102 not selected in process S303.

FIG. 7 shows a processing flow of the pump control device 103.
In process S1031, whether or not a pump selection notification indicating that the pump 102 to be controlled by the pump control apparatus 103 is a pump selected in the pump / valve selection process in process S303 is received from the piping network control apparatus 300 Confirm. If received, the process proceeds to step S1032. If not received, the process proceeds to step S1035. In the process S1032, the valve opening received together with the pump selection notification is compared with a preset valve opening (for example, 90%, 100%, etc.). If the received valve opening is greater than or equal to the preset valve opening, the process proceeds to step S1033 and the rotation speed of the pump 102 to be controlled is increased. If the received valve opening is less than the preset valve opening, the process proceeds to step S1034, and the rotational speed of the pump 102 to be controlled is decreased. In process 1035, the rotational speed of the pump 102 to be controlled is controlled so as to be the pump rotational speed received from the piping network control apparatus 300.

<Second Embodiment>
In the first embodiment, the processing flow executed from processing S301 to processing S304 in FIG. 2 and returning to processing S301 has been described. However, in the second embodiment, the piping network control apparatus 300 performs pump power consumption in processing S302. A heat supply system having a function of controlling the timing for performing the minimization process will be described.

  The configuration example of the heat supply system in the second embodiment is the same as the configuration example of the heat supply system in the first embodiment shown in FIG. 1, but the processing flow of the piping network control device 300 is different.

  Hereinafter, the difference from the processing of the piping network control device 300 of the first embodiment will be mainly described.

  FIG. 9 shows an outline of the processing flow of the piping network control device 300 in the second embodiment. In process S301, the same process as in the first embodiment is performed, and the process proceeds to process S305. In process S305, it is determined whether or not the pump power consumption minimization process is executed. If execution is possible, the process returns to pump power consumption minimization process in process S302, and if execution is impossible, the process returns to process S301. Processes after process S302 are the same as those in the first embodiment.

  FIG. 10 shows a processing flow of processing S305 in the second embodiment. In process S30511, it is determined whether a predetermined time set in advance from the pump control method distribution process in the previous process S304 has elapsed. If it has elapsed, the process proceeds to process 302 (process S30512 in the figure), and if it has not elapsed, the process returns to process S301 (process S30513 in the figure). By performing the processing from the processing S30511 to the processing S30513 after the processing S301, the control system distributed from the processing S304 is given time until the pump 102 of each heat supply plant executes, and the control system is stabilized. I can expect.

<Third embodiment>
In the second embodiment, the processing flow for executing the pump power consumption minimizing process in step S302 after the elapse of a predetermined time has been described in FIG. 10, but in the third embodiment, the pump power consumption minimizing process in step S305 is performed. A heat supply system with different execution determination processing will be described. The configuration example of the heat supply system in the third embodiment is the same as the configuration example of the heat supply system in the second embodiment, but the process flow of process S305 is different. Hereinafter, the difference from the process S305 will be mainly described.

FIG. 11 shows a process flow of process S305 in the third embodiment.
In process S30521, there is a customer building where the difference between the flow rate calculated in process S301 and the flow rate calculated in process S301 used in the previous process S302 exceeds a preset value, or each customer building Determine whether the sum of the above differences exceeds the preset value. If they match, the process proceeds to process 302 (process S30522 in the figure). If they do not match, the process returns to process S301 (process S30523 in the figure).

  By performing the processing from the above-described processing S30521 to processing S30523 after processing S301, frequent control of the pump due to minute demand fluctuations in the customer building and measurement errors of the thermometer 208, thermometer 209, and flow meter 210 Can be expected to reduce the number of updates and stabilize the control system.

<Fourth embodiment>
In the first to third embodiments, the configuration example in which the pump control device and the valve control device are distributed and arranged in each heat supply plant and each customer building has been described. In the fourth embodiment, different configuration examples are provided. explain.

In FIG. 12, the structural example of the heat supply system in 4th embodiment is shown.
The central control device 600 includes a pipe control device 300, a pump control device 103, and a valve control device 211. The pipe control device 300 performs the same processing as in the first to third embodiments. The pump control device 104 has the same functions as those of the first to third embodiments, except that the pump 102 of each heat supply plant can be centrally controlled. The valve control device 212 has the same functions as the first to third embodiments, but each customer building valve 203, valve 207, primary return thermometer 204, secondary forward thermometer 208, The difference is that the secondary return thermometer 209 and the flow meter 210 can be centrally controlled. Other various processes are the same as those in the first to third embodiments.

100: heat supply plant, 101: heat source machine, 102: pump, 103: pump control device 200: customer building, 300: heat piping network control device, 400: heat piping network, 500: communication line

Claims (7)

In a heat supply control device that controls a pump that conveys a heat medium and a valve that adjusts the flow rate of the heat medium from the pump,
A pump power consumption minimization processing unit that calculates the rotational speed and flow rate of the pump so as to satisfy the heat demand of the equipment connected to the valve and minimize the power consumption of the pump;
Using the calculated flow rate and the power consumption characteristics of the pump, and a pump / valve selection processing unit that selects a pump that controls the number of revolutions according to the opening of the valve ,
The pump power consumption minimization processing unit has as input the required flow rate on the primary side of the heat exchanger of the equipment,
Output the pump rotation speed of each heat supply plant that satisfies the required flow rate on the primary side of the heat exchanger and minimizes the total power consumption,
The pump / valve selection processing unit is a pump having the smallest increase in power consumption with respect to the increase in pump rotation speed based on the pump rotation speed, pump flow rate, and pump discharge pressure obtained in the pump power consumption minimization process. A valve having the largest valve opening is selected based on the opening of the valve in each customer building determined in the pump power consumption minimization process. apparatus. The heat supply control device according to claim 1 ,
In accordance with the opening degree of the valve selected by the pump / valve selection processing unit, the number of rotations of the pump selected by the pump / valve selection processing unit is increased or decreased. A heat supply control device characterized in that control is performed according to the pump rotation speed calculated by the minimization process. The heat supply control device according to claim 2 ,
A heat supply control device, further comprising: a pump power consumption minimization processing execution determination processing unit that controls execution timing of the pump power consumption minimization processing unit. The heat supply control device according to claim 3 ,
The pump power consumption minimization processing execution determination function includes determining whether a predetermined time has elapsed since the calculation result of the pump / valve selection processing is distributed to each heat supply plant and each customer building. The heat supply control apparatus characterized by the above-mentioned. The heat supply control device according to claim 3 ,
The pump power consumption minimization process execution determination function is configured such that the amount of change from the time point used in the pump power consumption minimization processing unit to the determination time is a preset value for the primary side required flow rate of the heat exchanger of the facility. Judging based on whether there is a customer building that exceeds or the sum of the amount of change of the equipment exceeds a preset value;
A heat supply control device comprising: A heat supply system comprising the heat supply control device according to any one of claims 1 to 5, the pump, and the valve. In a heat supply control method using a pump that conveys a heat medium, a valve that adjusts the flow rate of the heat medium from the pump, and a heat supply control device that controls the pump and the valve,
A pump power consumption minimizing step for calculating the rotation speed and flow rate of the pump so as to satisfy the heat demand of the equipment connected to the valve and to minimize the power consumption of the pump;
Using the calculated flow rate and the power consumption characteristics of the pump, and a pump / valve selection step of selecting a pump that controls the number of revolutions according to the opening of the valve ,
In the pump power consumption minimization step, the heat exchanger primary side required flow rate of the equipment is input,
Output the pump rotation speed of each heat supply plant that satisfies the required flow rate on the primary side of the heat exchanger and minimizes the total power consumption,
The pump / valve selection step includes a pump having the smallest increase in power consumption with respect to an increase in pump rotation speed based on the pump rotation speed, pump flow rate, and pump discharge pressure obtained in the pump power consumption minimization process, A heat supply control method, wherein a valve having the largest valve opening is selected based on the opening of the valve in each customer building obtained in the pump power consumption minimization process. .

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