JP2016099048A - Supply heat quantity control device, supply heat quantity control system, supply heat quantity control method and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a supply heat quantity control device capable of corresponding to variations of heat demand while suppressing energy costs, and further to provide a supply heat quantity control system, a supply heat quantity control method and a computer program.SOLUTION: A supply heat quantity control device has a control section. The control section controls a flow rate of a heat medium added with heat quantity in heat source equipment utilizing renewable energy. Further, the control section controls a flow rate of the heat medium flowing into cooling facilities radiating the heat medium and controls the heat quantity supplied to a user.SELECTED DRAWING: Figure 1

Description

  Embodiments described herein relate generally to a heat supply control device, a heat supply control system, a heat supply control method, and a computer program.

Conventionally, in a heat supply facility using a biomass boiler, the output is controlled by combining a biomass boiler and a fossil fuel boiler to cope with fluctuations in heat demand. For example, a biomass boiler with low output controllability is operated in a steady operation, and a fossil fuel boiler with variable output is provided with an output control function to compensate for the shortage by compensating for the shortage.
However, in the above system, since fossil fuel having a high fuel unit price is used, the energy cost may be increased.

JP 2004-95360 A

  The problem to be solved by the present invention is to provide a supply heat amount control device, a supply heat amount control system, a supply heat amount control method, and a computer program that can cope with fluctuations in heat demand while suppressing energy costs.

  The supply heat quantity control device of the embodiment has a control unit. The control unit controls the flow rate of the heat medium to which the amount of heat is applied in the heat source device that uses renewable energy. Furthermore, the control unit controls the amount of heat supplied to the consumer by controlling the flow rate of the heat medium flowing through the cooling facility that dissipates the heat medium.

The system block diagram showing the system configuration | structure of the supply heat quantity control system 100 in embodiment. The conceptual diagram of control of the amount of supplied heat. The schematic block diagram showing the structure of the supplied heat quantity control apparatus 20 concerning embodiment. The flowchart of the control processing which the supply heat quantity control apparatus 20 performs.

Hereinafter, a supplied heat quantity control device, a supplied heat quantity control system, a supplied heat quantity control method, and a computer program according to embodiments will be described with reference to the drawings.
FIG. 1 is a system configuration diagram illustrating a system configuration of a supply heat amount control system 100 according to the embodiment.
The supply heat amount control system 100 includes a heat source device 10, a supply heat amount control device 20, a three-way valve 30, a cooling facility 40, and thermometers 50-1 to 50-3. In the following description, the thermometers 50-1 to 50-3 are described as thermometers 50 unless otherwise distinguished.

  The heat source device 10 applies a certain amount of heat to the heat medium using renewable energy, and supplies a heat medium to which the certain amount of heat is applied (hereinafter referred to as “supply medium”). The heat source device 10 is, for example, a woody biomass boiler, a hot spring heat source heat exchanger, or the like. Here, the renewable energy is a resource that can be used semi-permanently, such as wood chips, underground heat, solar heat, and factory waste heat. Examples of the heat medium include water, antifreeze, steam, and air. The supply medium is hot water when the heat medium is water or antifreeze, and hot air when the heat medium is steam or air. The heat source device 10 supplies a supply medium with a constant output and a constant flow rate.

The supply heat amount control device 20 controls the heat amount of the supply medium (hereinafter referred to as “supply heat amount”) according to the demand of the customer 60. Specifically, the supply heat amount control device 20 controls the supply heat amount by controlling the opening degree of the three-way valve 30.
The three-way valve 30 is a valve whose opening degree can be adjusted. As shown in FIG. 1, the three-way valve 30 has a path through which the supply medium supplied from the heat source device 10 flows, a path through which the supply medium flows from the three-way valve 30 to the cooling facility 40, and a constant amount in the heat source device 10. A path through which the heat medium (supply medium) to which the amount of heat is applied flows from the three-way valve 30 without passing through the cooling facility 40 is connected. In the following description, a path through which the supply medium flows from the three-way valve 30 to the cooling facility 40 is referred to as a first path. A path through which a heat medium (supply medium) to which a certain amount of heat is applied in the heat source device 10 flows without passing through the cooling facility 40 from the three-way valve 30 is referred to as a second path.

  When the opening degree of the three-way valve 30 is changed, the supply medium supplied from the heat source device 10 is supplied to one or a plurality of paths. For example, when the opening degree of the three-way valve 30 is fully open, all of the supply medium flows through the first path (the path indicated by the arrow 1). That is, all of the supply medium flows to the cooling facility 40. On the other hand, when the opening degree of the three-way valve 30 is fully closed, all of the supply medium flows through the second path (path indicated by the arrow 2). That is, the supply medium does not flow to the cooling facility 40. Moreover, when the opening degree of the three-way valve 30 is other than fully open or fully closed, the supply medium flows through the first path and the second path according to the opening degree.

The cooling facility 40 is a device that radiates heat from the supply medium. The cooling facility 40 is, for example, a cooling tower or a radiator.
The thermometer 50 detects the temperature of the supply medium. For example, the thermometer 50-1 detects the temperature of the supply medium output from the heat source device 10. For example, the thermometer 50-2 detects the temperature of the supply medium supplied to the consumer 60. For example, the thermometer 50-3 detects the temperature of the supply medium supplied to the heat source device 10.

Next, a processing flow of the supply heat quantity control system 100 will be described with reference to FIG. In this description, the case where the opening degree of the three-way valve 30 is not fully opened or fully closed will be described as an example.
The heat source device 10 outputs the supply medium at a constant output. Let the flow rate of the supply medium supplied at this time be f1. A certain amount of heat is applied to the supply medium by the heat source device 10. When the supply medium having the flow rate f1 flows into the three-way valve 30, the three-way valve 30 separates the supply medium having the flow rate f1 into the supply medium having the flow rate f2 and the supply medium having the flow rate f3. The supply medium at the flow rate f2 represents the supply medium flowing through the first path, and the supply medium at the flow rate f3 represents the supply medium flowing through the second path.

  Thereafter, the supply medium of the flow rate f2 that has flowed through the first path is radiated by the cooling facility 40 and the amount of heat is reduced. On the other hand, the amount of heat does not change because the supply medium of the flow rate f3 flowing in the second path does not pass through the cooling facility 40. The supply medium having the flow rate f2 and the supply medium having the flow rate f3 are combined at the point 3. Therefore, a supply medium having a heat quantity lower than the heat quantity applied when output from the heat source device 10 is supplied to the customer 60. The supply heat amount control device 20 controls the opening degree of the three-way valve 30 according to the demand of the customer 60 and supplies a supply medium having a desired heat amount to the customer 60. As described above, the supply heat amount control system 100 can control the supply heat amount delivered to the customer 60 according to the demand of the customer 60.

Next, the control of the supply heat quantity of the supply heat quantity control system 100 will be specifically described with reference to FIG. In FIG. 2, for simplification of description, the heat source device 10, the supply heat amount control device 20 (not shown in FIG. 2), the cooling facility 40, and the customer 60 will be used for description.
FIG. 2 is a conceptual diagram of control of the supplied heat amount.
2A is an example in the case where the heat demand of the customer 60 is larger than a predetermined standard, and FIG. 2B is an example in the case where the heat demand of the customer 60 is smaller than a predetermined standard. 2A and 2B, the flow rate of the supply medium supplied from the heat source device 10 is the same.

  When the heat demand of the customer 60 is larger than a predetermined standard, the opening degree of the three-way valve 30 is adjusted so that the amount of supplied heat becomes large. Specifically, the supply heat quantity control device 20 controls the opening degree of the three-way valve 30 so that the flow rate f2 of the supply medium flowing through the first path is smaller than the flow rate f3 of the supply medium flowing through the second path. . By this control, as shown in FIG. 2A, the amount of heat dissipated by the cooling facility 40 is reduced and the amount of supplied heat is increased.

  On the other hand, when the heat demand of the customer 60 is smaller than a predetermined reference, the opening degree of the three-way valve 30 is adjusted so that the amount of supplied heat becomes small. Specifically, the supply heat quantity control device 20 opens the three-way valve 30 so that the flow rate f2 of the supply medium flowing from the three-way valve 30 to the first path is larger than the flow rate f3 of the supply medium flowing to the second path. Control the degree. By this control, as shown in FIG. 2B, the amount of heat dissipated by the cooling facility 40 is increased and the amount of supplied heat is decreased.

As described above, in the supply heat amount control system 100, even if the supply medium is supplied from the heat source device 10 at a constant output and a constant flow rate, the heat amount is controlled according to the demand of the customer 60 without controlling the output. can do.
Hereinafter, the details of the supply heat quantity control device 20 that performs the above control will be described.

FIG. 3 is a schematic block diagram illustrating a configuration of the supply heat quantity control device 20 according to the embodiment.
The supply heat amount control device 20 includes a CPU (Central Processing Unit), a memory, an auxiliary storage device, and the like connected by a bus, and executes a supply heat amount control program. By executing the supply heat amount control program, the supply heat amount control device 20 functions as a device including an acquisition unit 201, a customer information storage unit 202, and a valve control unit 203 (control unit). Note that all or part of the functions of the supply heat quantity control device 20 may be realized by using hardware such as an application specific integrated circuit (ASIC), a programmable logic device (PLD), or a field programmable gate array (FPGA). Good. The supplied heat amount control program may be recorded on a computer-readable recording medium. The computer-readable recording medium is a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM (Read Only Memory) and a CD-ROM, and a hard disk built in the computer system. Further, the supply heat amount control program may be transmitted / received via an electric communication line.

The acquisition unit 201 acquires various types of information. For example, the acquisition unit 201 acquires information regarding the temperature of the supply medium from each thermometer 50. For example, the acquisition unit 201 acquires information related to the output of the supply medium of the heat source device 10. The acquisition unit 201 may acquire information on the flow rate of the supply medium supplied to the three-way valve 30 from a flow meter (not shown).
The customer information storage unit 202 is configured using a storage device such as a magnetic hard disk device or a semiconductor storage device. The customer information storage unit 202 stores information related to heat demand for each customer 60. The information regarding the heat demand is information on the amount of heat supplied by the customer 60.

The valve control unit 203 controls the opening degree of the three-way valve 30 based on the information acquired by the acquisition unit 201 and the information stored in the customer information storage unit 202. Hereinafter, specific processing of the valve control unit 203 will be described with reference to FIG.
The relationship of f1 = f2 + f3 is established between the flow rate f1 of the supply medium flowing into the three-way valve 30, the flow rate f2 of the supply medium flowing in the first path, and the flow rate f3 of the supply medium flowing in the second path. Here, if the opening degree of the three-way valve 30 is α (α = 0 to 1), the flow rate f2 and the flow rate f3 can be expressed as the following Expression 1.

  Further, assuming that the heat dissipation amount in the cooling facility 40 is proportional to the flow rate of the supply medium by a constant C, the heat dissipation amount is expressed as in Equation 2.

  Here, assuming that the output of the heat source device 10 is W, the amount of heat supplied to the customer 60 is expressed by the following Equation 3.

  Since the output W, the constant C, and the flow rate f1 of the heat source device 10 of Formula 3 are constant values, the amount of heat supplied to the consumer 60 is represented by a linear function of the opening degree α of the three-way valve 30. The valve control unit 203 calculates an opening degree α that is the amount of heat supplied according to the demand of the customer 60, and controls the opening degree of the three-way valve 30 so that the calculated opening degree is obtained.

FIG. 4 is a flowchart of a control process performed by the supply heat quantity control device 20.
The acquisition unit 201 acquires various types of information (step S101). The valve control unit 203 calculates the opening degree of the three-way valve 30 based on the information acquired in step S101 and the information stored in the customer information storage unit 202 (step S102). The valve control unit 203 controls the opening degree of the three-way valve 30 so that the calculated opening degree is obtained (step S103).

  According to the supply heat quantity control system 100 configured as described above, the supply heat quantity control device 20 adjusts the flow rate of the supply medium flowing into the cooling facility 40 by adjusting the opening degree of the three-way valve 30. When the supply medium flows into the cooling facility 40, it is dissipated to reduce the amount of heat. In the supply heat amount control system 100, the supply heat amount is controlled by adjusting the flow rate of the supply medium that flows to the cooling facility 40 as described above. Accordingly, it is possible to meet the heat demand according to the demand of the customer 60. Furthermore, renewable energy is used as the supply medium instead of fossil fuel. Thereby, energy cost can be held down. Therefore, it becomes possible to cope with fluctuations in heat demand while suppressing energy costs.

  Further, in the supply heat quantity control system 100, it is possible to respond to the heat demand according to the demand of the customer 60 only by adjusting the opening degree of the three-way valve 30. Therefore, it is not necessary to control the output of the heat source device 10 for each customer 60. Therefore, it is possible to reduce the possibility of reducing the processing capacity of the entire supply heat amount control system 100 due to unnecessary processing.

Hereinafter, modified examples of the supply heat quantity control device 20 will be described.
Renewable energy may or may not include waste as long as it is a resource described above.
In the embodiment, the three-way valve 30 is described as an example of a valve that separates the flow rate of the supply medium supplied from the heat source device 10, but the present invention is not limited to this. For example, the valve that separates the flow rate of the supply medium supplied from the heat source device 10 may be any valve as long as it has three or more connection ports. Specific examples of the valve having three or more connection ports include a four-way valve and a five-way valve.
Further, a method of controlling the heat radiation amount by flowing the supply medium to the cooling facility 40 without using the three-way valve 30 and controlling the rotational speed of the fan or the like of the cooling facility 40 may be used.
The heat of the supply medium radiated by the cooling facility 40 may be utilized for drying wood or the like that serves as fuel for the supply medium. When utilized in this way, the supply heat quantity control system 100 is provided with a duct that connects the drying chamber for drying wood and the cooling equipment 40. In the supply heat quantity control system 100, the heat radiated from the cooling facility 40 is caused to flow to the drying chamber through the duct. This makes it possible to reuse the heat dissipated.

  According to at least one embodiment described above, the flow rate of the supply medium that flows through the cooling facility that has the control unit that controls the flow rate of the supply medium in the heat source device that uses renewable energy, and the control unit dissipates the supply medium. By controlling the amount of heat supplied to the consumer by controlling the energy, it is possible to cope with fluctuations in heat demand while suppressing energy costs.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and the equivalents thereof.

DESCRIPTION OF SYMBOLS 10 ... Heat source apparatus, 20 ... Supply heat quantity control apparatus, 30 ... Three-way valve, 40 ... Cooling equipment, 50 (50-1-50-3) ... Thermometer, 60 ... Consumer, 201 ... Acquisition part, 202 ... Customer Information storage unit, 203 ... valve control unit

Claims (5)

A control unit that controls the flow rate of a heat medium to which heat is applied in a heat source device that uses renewable energy,
The said control part is a supply heat quantity control apparatus which controls the heat quantity supplied to a consumer by controlling the flow volume of the said heat medium which flows into the cooling facility which radiates the said heat medium.   The control unit includes at least a path through which a heat medium to which heat supplied from the heat source device is applied, a path through which the heat medium flows to the cooling facility, and a heat medium to which heat is applied from the heat source equipment are cooled. Control the amount of heat supplied to the consumer by controlling the flow rate of the heat medium flowing to the cooling facility by controlling the opening of a valve having a plurality of connection ports connected to the flow path without passing through the facility The supply heat quantity control device according to claim 1. A cooling facility that dissipates a heat medium to which heat is applied in a heat source device that uses renewable energy; and
A supply heat amount control device comprising a control unit for controlling the amount of heat supplied to the consumer by controlling the flow rate of the heat medium flowing through the cooling facility;
Supply heat quantity control system comprising. Having a control step of controlling the flow rate of the heat medium to which the amount of heat is applied in the heat source equipment using renewable energy,
In the control step, a supply heat amount control method for controlling a heat amount supplied to a consumer by controlling a flow rate of the heat medium flowing in a cooling facility for radiating the heat medium. Causing the computer to execute a control step for controlling the flow rate of the heat medium to which the amount of heat is applied in the heat source device using renewable energy,
In the control step, a computer program for controlling the amount of heat supplied to a consumer by controlling a flow rate of the heat medium flowing in a cooling facility for radiating the heat medium.

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