JP2001272051A - Method for operating heat supply system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an art to promote saving of energy without damaging convenience and comfortability, in a heat supply system consisting of a heat source machine 1 to heat, cool, or compress a heating medium W, piping 20 to carry the heating medium W, and a plurality of heat consuming instruments 30 to consume the heat of the heating medium W. SOLUTION: In the heat supply system 100, communication is practicable between the heat source machine 1 and the heat-consuming instrument 30. Each of the heat consuming instruments 30 executes, in order, a necessary value transmitting process wherein each of necessary values, at which a control object representing the given attribute of the heating medium W is needed, is transmitted to the heat source machine 1, and a setting process wherein, in the heat source machine 1, a control target value for the control object is decided based on the respective necessary values received at the necessary value transmitting process and the control object of the heating medium W is set to a control target value.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a technology used for district heating and cooling, building cooling and heating, home central heating, and the like. One or a small number of heat source units for heating, cooling or compressing a heating medium, The present invention relates to an operation method of a heat supply system including a pipe for conveying a medium and a plurality of heat consuming devices that consume heat of the heat medium.

[0002]

2. Description of the Related Art As a heat supply system as described above, water or the like is used as a heat medium, and the heat medium is heated or cooled by a heat source device, and heated or cooled by respective heat consuming equipment by the hot or cold heat. And using heat or steam as a heat medium, compresses the heat medium in a heat source device and condenses the compressed heat medium, thereby releasing the condensed heat into the room to perform heating. In some cases, the heat medium after the condensation is evaporated to remove the heat of vaporization from the room to perform cooling.

In such a conventional cooling and heating system, the heat consuming device such as a radiator operates at full capacity until the room temperature of the installed room reaches the set temperature set in the heat consuming device. After reaching the set temperature, in order to maintain the room temperature at the set temperature, control is performed by reducing the flow rate of the heat medium. On the other hand, the heat source unit controls the forward temperature when water or the like is used as the heat medium, or controls only the forward pressure when vaporizing the heat medium using vapor or chlorofluorocarbon as the heat medium and carrying the latent heat. The temperature difference or pressure difference between the heat medium entering and exiting the heat source unit is reduced and the load is reduced,
In the case of heating, since the temperature or pressure of the heat medium sent from the heat source unit is going to increase, the energy consumption of the heat medium heating is controlled by detecting this.

[0004] Part of home central heating includes a separate ON-OF between a heat source unit and a heat consuming device.
F information is transmitted and received, the load is estimated from the ON-OFF time information of the radiator, the set temperature of the heat medium in the heat source device is controlled, or the set temperature is switched between the two set temperatures to send the heat medium. However, there was no attempt to control the flow rate of the heat medium.

[0005]

In such a heat supply system, for example, in a home central heating system, there is an example in which heat loss from a pipe accompanying the transfer of a heat medium reaches as much as 10%. Since the pump for feeding the medium is not controlled, the power loss of the pump when the number of used rooms is small is not negligible. Further, heat loss from piping and power loss of the pump due to heat transfer by the heat medium are serious problems of the central heat source type system. An object of the present invention is to promote energy saving in such a heat supply system without impairing convenience and comfort.

[0006]

[Means for Solving the Problems] [Configuration 1] An operation method of a heat supply system according to the present invention is characterized in that, in the heat supply system, between the heat source device and the heat consuming device in the heat supply system. Required, and in each of the heat consuming devices, a predetermined attribute of the heat medium is a control target, and a required value of the control target required for operation of the heat consuming device is transmitted to the heat source device. A transmitting step, in the heat source device, receiving the required value transmitted from each of the heat consuming devices, determining a control target value of the control target based on each of the required values, controlling the heat medium And a setting step of setting an object to the control target value in order.

[Effect] As in the present configuration, the heat supply system is controlled between the heat source device and the plurality of heat consuming devices by controlling temperature, pressure, flow rate, heat amount, and the like as predetermined attributes of the heat medium. Communication is possible for that value. In this method, in order to operate such a heat supply system, first, a necessary value transmission step is performed in the heat consuming device.
The heat radiation amount of the heat medium in the heat consuming device is determined for each device as a function of the control target of the heat medium such as the temperature and the flow rate of the heat medium supplied from the heat source device. The operating load of the heat consuming device can be given by calculation, or the device itself can be estimated from its temperature rise characteristics by performing a start-up operation or the like for a while with a constant heat radiation amount. Therefore, in the required value transmission step, the heat consuming device controls the temperature or the pressure and the flow rate or the value of the temperature or the pressure and the amount of heat as the control target of the heat medium based on the set temperature and the operating load set in the heat consuming device Is determined as a required value, and the required value is transmitted to the heat source device.

Next, the setting process is performed in the heat source device. In the setting process, the heat source device receives the respective required values transmitted by the respective heat consuming devices in the required value transmitting process, and performs the respective processes. The control target value of the control target of the heat medium is determined based on the required value, and the heat consumption energy used for heating the heat medium and the flow rate of the forward heat medium are determined so that the control target of the heat medium becomes the control target value. Set it.

By operating the heat supply system in this manner, for example, in the heat source device, the control target value of the control target of the heat medium can be determined in accordance with the respective operating states of the plurality of heat consuming devices. For example, in order to reduce heat loss from pipes, it is advantageous to carry out heat transfer with a heat medium at a temperature as close to room temperature as possible, and to reduce power loss in pipes, etc., at a flow rate as low as possible. It is possible to determine a control target value that can cover a required value from the heat consuming device while considering that it is advantageous to send the heat medium, and to operate the heat source device with a minimum necessary energy.

According to a second aspect of the present invention, in the method of operating a heat supply system according to the present invention, in addition to the configuration of the operation method of the heat supply system of the first aspect, the control target is set in the setting step. After determining the value, a control target value transmitting step of transmitting the control target value in the heat source device to the respective heat consuming devices, and in the heat consuming device,
The control target value transmitted from the heat source device is received, and an adjusting step of adjusting an operation condition of the heat consuming device is sequentially executed based on the control target value.

[Operation and Effect] As in the present configuration, after the control target value transmitting step is performed and the heat source unit determines the control target value for the control target of the heat medium in the setting step, the heat source unit determines the control target value. To each heat consuming device. Each heat consuming device that has received the control target value performs an adjusting process, compares the received control target value with the set temperature or the like set in the heat consuming device, and determines, for example, the heat consumption such as the flow rate of the heat medium. Adjust the operating conditions of the equipment to operate.

That is, in each heat consuming device, the amount of heat of the heat medium for which the temperature and the flow rate are set to the control target values in the heat source device, which is larger than that required by the heat consuming device, is reduced. Operating conditions can be adjusted to consume only the required amount of heat. Therefore, since the control target value set in the heat source device is transmitted to each heat consuming device, and each heat consuming device can perform feedforward control according to the value, the transient instability at the time of changing the setting of the heat source device is reduced. It can be minimized. Of course, it is also possible to use the feedback control for adjusting the flow rate of the heat medium by detecting the temperature or the load in the heat consuming device.

[Structure 3] The method of operating a heat supply system according to the present invention, as described in claim 3, in addition to the structure of the method of operating the heat supply system of structure 1 or 2, further comprises: In order to determine the control target value based on each of the necessary values, when the control target is the temperature of the heat medium, the heat source device heats the heat medium, and the respective required values are used. The maximum value, when the heat source device is to cool the heat medium, determine the minimum value of each of the required values as the control target value, when the control target is the pressure of the heat medium, Determine the maximum value of each required value as the control target value, if the control target is the flow rate or the amount of heat of the heating medium, determine the total value of the respective required values as the control target value. Features.

[Function and Effect] As in the present configuration, in the setting step, in order to determine the control target value of the control target of the heat medium based on each necessary value, the heat source unit heats the heat medium to perform the heating operation. If the control target is a temperature or pressure, the heat source unit shall have a maximum margin for the required value required by each heat consuming device, and a sum or a total margin for the flow rate or heat quantity. The control target value is determined based on the expected value. Then, the heat medium set to the control target value that can cover the required value required from each heat consuming device is supplied to each heat consuming device, and the excess amount of heat of the heat medium in each heat consuming device is Driving is performed to reduce this, and automatic driving becomes possible. When the heat source unit cools the heat medium to perform the cooling operation, the heat source unit sets the minimum value of the required value required by each heat consuming device when the control target is temperature to the control target value. The control target value is determined for other control targets in the same manner as in the heating operation described above. This does not require any additional cost, since heat consuming equipment originally has the function of automatically controlling the temperature (load). Realistically,
Since a problem such as an excessive excess or deficiency of the flow rate distribution occurs, the flow rate to be set is slightly (10 to 20) relative to a required value.
%) Is preferable.

[Structure 4] According to a fourth aspect of the present invention, in addition to the configuration of the heat supply system according to any one of the first to third aspects, the method of operating a heat supply system according to the present invention further includes the heat source. Starting the required value transmission step at the time when the operation start or stop of any one of the heat consuming device or the heat consuming device is detected, or when the set value in the heat consuming device is changed, or at a predetermined time interval. Features.

[Effects] In the operation method of the heat supply system described above, the timing for starting the required value transmission step is, as in the present configuration, when the operation start or stop of the heat source device or the heat consuming device is detected, Or, when the set value such as the set temperature of the heat consuming device is changed,
Alternatively, it may be a point in time when a predetermined time has passed from the point in time when the last required value transmission step was performed, and the operation state of the heat supply system may be always preferable.

[Structure 5] According to a fifth aspect of the present invention, there is provided a method for operating a heat supply system according to the present invention, in addition to the configuration of the method for operating a heat supply system according to any one of the first to fourth aspects. To communicate between the machine and the heat consuming equipment,
Communication is performed by digital signals through a line provided between the heat source device and the heat consuming device.

[Effects] According to this configuration, the heat source unit and each heat consuming device are connected to each other by, for example, a wireless line, a dedicated line, a power line,
A home bus, an intranet line, or, in the case of a remote site, a connection via the Internet line or a telephone line, etc., so that the necessary value or control target value of the control target of the heat medium can be communicated by digital signals between the two devices. Can be configured.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of an operation method of a heat supply system according to the present invention, an operation method of a home heating system 100 using hot water as a heat medium W will be described with reference to the drawings. A heating system 100 shown in FIG. 1 includes a heat source device 1 that heats water as a heat medium W, a pipe unit 20 for conveying the heat medium W, and a plurality of heat consuming devices 3 that consume heat of the heat medium W.
0.

The heat source unit 1 includes a burner 11 for burning fuel gas supplied through a flow control valve 14, and a burner 1
The heat exchange between the combustion gas generated by the heat pipe 1 and the heat medium W supplied from the return pipe 15 is performed, and the heated heat medium W is
6 and a heat exchanger 12 for discharging. Return 1
5 is provided with a circulation pump 13 for pumping the heat medium W,
Further, a flow meter 10 that detects the flow rate of the heat medium W in the outgoing pipe 16 and outputs the detection result to the control device 18 is provided.
As the heat medium flow rate setting function, the control device 18 detects the flow rate of the heat medium W by the flow meter 10 while the circulation pump 1
3, the flow rate of the heat medium W can be set. The outgoing pipe 16 is provided with a temperature sensor 9 for detecting the temperature of the heat medium W and outputting the detection result to the control device 18. While detecting the temperature of the heat medium W by the sensor 9, the combustion load in the burner 11 is adjusted by the flow control valve 14, and the temperature of the heat medium W can be set to a predetermined temperature. The return pipe 15 is connected to a cistern 17 for temporarily storing the thermally expanded heat medium W.

The piping section 20 is provided with a return header 21 connected to the return pipe 15 and a forward header 22 connected to the forward pipe 16. The return header 21 has respective heat consuming devices 30 described later. Return pipe 2 connected to the discharge side of heat medium W
3, 25, 27 are connected to the outgoing header 22. Outgoing pipes 24, 27 connected to the supply side of the heat medium W of the heat consuming device 30 are provided.
26 and 28 are connected.

Further, in the heating system 100, the heat medium W
A hot-air radiator 30A for supplying the heat medium W to the return pipe 23 and supplying the heat medium W to the return pipe 23 and discharging the heat medium W after the heat release to the return pipe 25.
B, a bathroom ventilation dryer 30C for supplying the heat medium W through the outgoing pipe 28 and discharging the heat medium W after heat radiation to the return pipe 27 is provided.

The hot air radiator 30A is provided with a fan device 32 for introducing indoor air into the inside and a heat exchanger 31 for flowing the heat medium W supplied through a flow control valve 33. The air can be heated in the exchanger 31 and the warm air can be discharged indoors. Further, a control device 34 that controls the flow control valve 33 to adjust the flow rate of the heat medium W is provided.

The hot water floor heater 30B has a flow control valve 38
The heat radiating pipe 37 for flowing the heat medium W supplied through the
It is arranged inside the floor material part 36 provided as a floor in the room,
The floor member 36 can be warmed. In addition, the flow control valve 3
A control device 39 for controlling the flow rate of the heat medium W by controlling the heat medium 8 is provided.

The bathroom ventilation dryer 30C is provided with a fan device 42 for introducing bathroom air into the interior, and a heat exchanger 41 for flowing the heat medium W supplied through a flow control valve 43. The air can be heated in the exchanger 41 and the warm air can be discharged to the bathroom. Further, a control device 44 that controls the flow control valve 43 to adjust the flow rate of the heat medium W is provided.

Further, the heating system 100 includes the heat source unit 1
And each of the heat consuming devices 30 can communicate with each other. That is, the control device 18 provided in the heat source device 1 and the control devices 34, 39, 44 provided in each heat consuming device are:
The communication devices 19, 35, 40, and 45 are respectively connected to the communication devices 19, 35, 40, and 45, and the communication devices 19, 35, 40, and 45 are connected to the home bus 5 provided in the home. Therefore, the respective control devices 18, 34, 39, and 44 control the temperature and the flow rate, which are the predetermined attributes of the heat medium W, by digital signals, and can communicate the values.

Next, an operation method of the heating system 100 will be described below. The heating system 100 is provided when the operation of any one of the heat consuming devices 30 starts or stops, when the operating condition such as the set temperature of the heat consuming device 30 changes, or when the heat source device 1 or the heat consuming device 30
When the environmental condition changes, the control target of the temperature and the flow rate of the heat medium W can be accurately adjusted according to the operation state. That is, each step described below is executed when at least one of the heat source device 1 and the heat consuming device 30 starts or stops operating, or at predetermined time intervals.

First, as shown in FIG. 2, a required value transmitting step (st1) for transmitting necessary values required for the temperature and the flow rate of the heat medium W in each heat consuming device 30 to the heat source unit 1 respectively.
I do. That is, when the operation of the heat consuming device 30 is started, the required values of the temperature and the flow rate of the heat medium W required in the rated operation are transmitted to the heat source device 1 via the home bus 5.
Further, when the steady operation is performed, the temperature and the flow rate of the heat medium W corresponding to (or appropriate to) the load at that time are transmitted at predetermined time intervals. Also, when the set temperature changes or when the load fluctuates due to disturbance, the temperature and flow rate of the heat medium W corresponding to the change are transmitted. Further, in the hot air radiator 30A, if the temperature of the heat medium W is too low, the user may feel cold. Therefore, it is effective to provide a lower limit of the required temperature and adjust the heat quantity by the flow rate. In addition, the control devices 34, 39, and 44 of the respective heat consuming devices 30 predict the control target values of the temperature and the flow rate of the heat medium W transmitted from the heat source device 1 described later, and determine the respective operating conditions. The operation is performed by adjusting the flow control valve 33 and the fan device 32, the flow control valve 38, or the flow control valve 34 and the fan device 42. When the control is performed by ON-OFF of the flow rate, a predetermined temperature and a required value of the flow rate are transmitted to the heat source unit 1 at the time of ON, and
At the time of FF, the required value of the flow rate is set to 0, transmitted to the heat source device 1, and the flow control valve may be closed.

Next, the control device 18 of the heat source unit 1 determines the control target values of the temperature and the flow rate of the heat medium W based on the respective required values received in the required value transmitting step (st1), A setting step (st2) of setting the temperature and the flow rate of the heat medium W to the control target values by operating the circulation pump 13 and the circulation pump 13 is performed. That is, the control device 18 of the heat source device 1
The required values of the temperature and the flow rate of the heat medium W received from 0 are received, and the temperature of the heat medium W to be sent to the forward header 22 side is the maximum value of the required values received from each heat consuming device 30 and the flow rate is the sum of them. A value that allows for some margin in the value is determined as a control target value. To set the temperature, the flow rate control valve 14 is adjusted while detecting the temperature of the heating medium W by the temperature sensor 9 to reduce the heat consumption in the burner 11. Adjust and adjust the output of the circulation pump 13 to set the flow rate. Further, the control device 18 of the heat source device 1 performs the control target value transmitting step (st3).
And the heat medium W set in the setting step (st2).
Are transmitted to the respective heat consuming devices 30.

In the heat consuming device 30 that has received the control target values of the temperature and the flow rate of the heat medium W in the control target value transmitting step (st3), the operating conditions of the heat consuming device 30 are adjusted based on the control target values. The adjusting step (st4) is performed, and the operating conditions are adjusted so as to reduce the amount of heat transmitted above the required value. Thus, each heat consuming device 3
0 continuously transmits the required value of the control target of the optimum heat medium W required by itself, and the heat source unit 1 determines the control target value to determine the optimum operation condition based on the value. To each heat consuming device 30 is repeated. When any one of the heat consuming devices 30 is stopped, stop information is transmitted, and the heat source device 1 excludes the device from the heat consuming devices 30 to be controlled.

[0031]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of an actual operating state of the heating system 100 described above will be described below. The hot air radiator 30A has an output characteristic that is approximately proportional to the temperature and the flow rate of the heat medium W which is hot water.
Below this level, the temperature of the warm air is too low and has the characteristic of giving the human body a feeling of cool air, so the lower temperature limit is set. The hot water floor heater 30B has a temperature of the heating medium W of 40 ° C. to 6 ° C.
The temperature is as low as about 0 ° C., and the temperature distribution of the floor becomes smaller as the operation is performed at a larger flow rate, so that a favorable operation state is obtained. Since the purpose of the bathroom ventilation dryer 30C is to complete the drying in a short time, it is desirable to operate the heating medium W as high as possible.

Now, consider a situation in which only the hot air radiator 30A is operated as a radiator. Since it is desirable that the heating process of the heat medium W in the heat source device 1 is performed in a short time, the warm-air radiator 30A performs the required value transmission step (st1) immediately after the operation starts.
At the temperature and flow rate required for rated operation, for example, 80
C, 1.5L / min as required value,
The heat source device 1 supplies a heat medium W corresponding to this.

After about ten minutes, since the room temperature approaches a steady state, the warm air radiator 30A, which senses that the difference between the load or the set temperature and the current temperature of the heat medium W has become small, is set as a necessary value. For example, a value of 60 ° C. and 1.5 L / min is transmitted to the heat source unit 1, and the heat source unit 1 corresponds thereto. When the warm air radiator 30A enters a steady operation state and the load further decreases, the warm air radiator 30A becomes, for example, 50 ° C. and 1.5 L / min.
The calculation that requires the calorific value of is performed.
The lower limit of the temperature is fixed at 55 ° C., the flow rate is reduced to 1.3 L / min, and the transmission is performed, and the heat source unit 1 performs control corresponding to this.

Here, it is assumed that the hot water floor heater 30B is started. Also in the hot water floor heater 30B, for example, 70 ° C., 4.5
The value L / min is transmitted to the heat source device 1. Heat source machine 1
Received a different request for the heat medium W from the hot air radiator 30A and the hot water floor heater 30B already in operation, so that the maximum value of the temperature of the heat medium W was 70 ° C. and the flow rate was a temporary summation. A value of 5.8 L / min is determined as the control target value, and the heat medium W is sent out, and the control target value is sent to the hot air radiator 30A and the hot water floor heater 30B.

The warm air radiator 30A receiving this information sets the 7
If the temperature is 0 ° C., the output becomes excessive.
L / min, and the information is transmitted to the heat source unit 1 as a required value, and the heat source unit 1 receiving the information sets the flow rate to 5.6 L / min.
/ Min. If the hot water floor heater 30B approaches a steady state, the hot water floor heater 30B requests to lower the temperature of the heat medium W to, for example, 50 ° C. , Heat source equipment is 55
C., the status is transmitted, and the received hot water floor heater 30B performs control to change the flow rate to the flow rate required for the 55 ° C. operation.

Thereafter, when the hot air radiator 30A is stopped, the heat source unit 1 lowers the temperature of the heat medium W to 50 ° C. requested by the hot water floor heater 30B based on the information, and controls the fact. It transmits to the hot water floor heater 30B as a target value, and performs flow rate change communication.

In this situation, it is assumed that the bathroom ventilation dryer 30C starts operating. Since the bathroom ventilation dryer 30C is an uncontrolled operation, for example, the necessary value 8
Transmit 0 L, 3 L / min. The heat source device 1 changes the temperature of the heat medium W to the maximum value of 80 ° C. of the hot water floor heater 30B and the bathroom ventilation dryer 30C, adds the flow rates, changes the operation, and sends a message to that effect. Information is exchanged with the floor heater 30B to determine a new flow rate. The hot water floor heater 30B responds to the condition of the new heat medium W by the flow restrictor. This situation continues until the operation of the bathroom ventilation dryer 30C is stopped, and when the operation is stopped, the operation returns to the original operation by exchanging information. Less than,
The above control is repeated. The control of the flow rate of the heating medium W is as follows.
The number of revolutions and the flow rate of the circulation pump 13 may be reduced proportionally, or the on-off valve provided in the flow path of the heat medium W may be provided with a fast cycle (for example,
In the case of opening / closing in (several tens of seconds), the opening time ratio (duty ratio) may be reduced.

Up to now, as an embodiment of the operation method of the heat supply system of the present invention, a home heating system 100 has been described.
However, the present invention can also be implemented as a heat source device for a cooling system that cools a heat medium and uses the cold heat of the heat medium in each heat consuming device. In this case, the setting step In the heat source equipment, the minimum value of the required value of the temperature of the heat medium required by each heat consuming device is determined as the control target value, and the flow rate is set to a value that allows for some margin in the total value of the heat medium. Determine as a value. Further, in the heat source unit, when a refrigerant such as chlorofluorocarbon as a heat medium is compressed, the refrigerant is condensed to perform a heating operation, and the refrigerant is evaporated to perform a cooling operation, the pressure of the refrigerant becomes a control target, What is necessary is just to perform the same control as the above-mentioned heating system. Since the heat quantity is the product of the temperature difference between the entrance and the exit and the flow rate, for example, transmission of the heat quantity and the temperature (difference) is equivalent to transmission of the flow rate and the temperature (difference).

[0039]

According to the present invention, as described above, it is possible to minimize the temperature of the heat medium and minimize the transport amount of the heat medium within a range where convenience is not lost. . As a result, heat loss from the pipe and pump power can be significantly reduced. In particular, the effect of the pump power is more remarkable as compared with the case where the pump is operated at a constant load assuming the maximum load regardless of the operation state of the load. As for the hot water heating system, when the heat source device is a condensing boiler that recovers up to latent heat of condensation of water vapor in the combustion exhaust gas, the energy saving effect of the present invention is large. In a condensing boiler, the return temperature of hot water directly affects the amount of exhaust gas condensed, that is, the amount of latent heat recovered, so the lower the return temperature, the better. Since the dew point of the exhaust gas is more than 50 ° C., latent heat cannot be recovered unless the return temperature is kept below that. Another operational advantage is that the rise time of heat consuming equipment can be reduced. Within the allowable range of the materials of the heat consuming equipment, it is also possible to obtain a heat medium condition higher than the rating (for example, a flow rate increased by 50).

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a heating system illustrating an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an operation method of the heat supply system according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heat source unit 20 Pipe part 30 Heat consuming equipment 100 Heating system (heat supply system) W Heat medium

Claims (5)

[Claims] An operation of a heat supply system comprising a heat source device for heating, cooling or compressing a heat medium, a pipe for conveying the heat medium, and a plurality of heat consuming devices for consuming heat of the heat medium. The method, wherein in the heat supply system, communication between the heat source device and the heat consuming device is enabled, and in each of the heat consuming devices, a predetermined attribute of the heat medium is controlled, and the heat consumption is reduced. A required value transmission step of transmitting the required value of the control object required for operation of the device to the heat source device, and, in the heat source device, receiving the required value transmitted from each of the heat consuming devices, And a setting step of determining a control target value of the control target based on the required value and setting the control target of the heat medium to the control target value. 2. A control target value transmitting step of transmitting the control target value to the respective heat consuming devices in the heat source device after determining the control target value in the setting step; The method for operating a heat supply system according to claim 1, wherein the control target value transmitted from the heat source device is received, and an adjusting step of adjusting operating conditions of the heat consuming device is sequentially performed based on the control target value. . 3. In the setting step, when the control target value is determined based on the respective required values, when the control target is the temperature of the heat medium, the heat source device heats the heat medium. When the maximum value of the respective required values, when the heat source device is to cool the heat medium, the minimum value of the respective required values is determined as the control target value, the control target is If the pressure of the heating medium, the maximum value of each of the required values is determined as the control target value.If the control target is the flow rate or the amount of heat of the heating medium, the total value of the respective required values is determined. 3. The method according to claim 1, wherein the control target value is determined as the control target value. 4. When the operation start or stop of any one of the heat source device and the heat consuming device is detected, or when a set value in the heat consuming device is changed, or at a predetermined time interval, the required value is set. The method for operating a heat supply system according to any one of claims 1 to 3, wherein the transmission step is started. 5. The communication according to claim 1, wherein the communication between the heat source device and the heat consuming device is performed by a digital signal through a line provided between the heat source device and the heat consuming device. An operation method of the heat supply system according to claim 1.