JP-2026075370-A - Heat source system

JP2026075370AJP 2026075370 AJP2026075370 AJP 2026075370AJP-2026075370-A

Abstract

[Problem] In a heat source system equipped with multiple heat sources, including a waste heat utilization heat source and a non-waste heat utilization heat source, the objective is to improve the operating efficiency of the non-waste heat utilization heat source by lowering the outlet temperature of the non-waste heat utilization heat source while prioritizing the use of waste heat discharged from the waste heat source. [Solution] A circulation supply path 3 is provided for circulating and supplying a heat transfer medium heated by multiple heat source units 1 to a heat demand unit 2. Multiple heat source units 1 are arranged in series in the order of non-waste heat utilization type heat source unit 11 and waste heat utilization type heat source unit 12, from the upstream side to the downstream side in the direction of heat transfer medium flow. A heat transfer medium supply temperature control unit 41 is provided to control the temperature of the heat transfer medium supplied to the heat demand unit 2 to the required temperature by adjusting the outlet temperature of the non-waste heat utilization type heat source unit 11. [Selection Diagram] Figure 1

Inventors

安江楽人
小林佑輔

Assignees

株式会社竹中工務店

Dates

Publication Date: 20260508
Application Date: 20241022

Claims (2)

The system is equipped with a circulation supply path that circulates and supplies the heat transfer medium heated by multiple heat source units to the heat demand unit. The system includes multiple heat source units, including a waste heat utilization type heat source unit that heats the heat transfer medium using the waste heat from a waste heat source, and a non-waste heat utilization type heat source unit that heats the heat transfer medium without using the waste heat. In the aforementioned circulation supply path, a plurality of heat source units are provided in series, in the order of non-waste heat utilization type heat source unit, then waste heat utilization type heat source unit, from upstream to downstream in the direction of heat transfer medium flow. A heat source system equipped with a heat medium supply temperature control unit that controls the temperature of the heat medium supplied to the heat demand section to a required temperature by adjusting the outlet temperature of the aforementioned non-waste heat utilization type heat source unit.
The heat source system according to claim 1, wherein the heat medium supply temperature control unit adjusts the outlet temperature of the non-waste heat utilization heat source unit in accordance with the ratio of the amount of heat supplied by the waste heat utilization heat source unit to the heat medium to the load of the heat demand unit.

Description

This invention relates to a heat source system that includes a circulation supply path for circulating and supplying a heat transfer medium heated by multiple heat source units to a heat demand unit. The multiple heat source units include waste heat utilization type heat source units that heat the heat transfer medium using waste heat supplied from a waste heat source, and non-waste heat utilization type heat source units that heat the heat transfer medium without using waste heat. This type of heat source system incorporates multiple heat source units, including both waste heat utilization and non-waste heat utilization units, to effectively utilize the waste heat discharged from the waste heat source while appropriately controlling the temperature of the heat transfer medium supplied to the heat demanding unit to the required temperature (see, for example, Patent Documents 1 and 2). In the heat source system described in Patent Document 1, multiple heat source units are arranged in series in the circulation supply path, from upstream to downstream in the direction of heat transfer, in the order of waste heat utilization type heat source unit (heat exchanger 1164 that heats using hot water from a waste heat recovery type heat pump 10) and non-waste heat utilization type heat source unit (other heat source Z). Furthermore, in the heat source system described in Patent Document 2, multiple heat source units are arranged in series in the circulation supply path, from upstream to downstream in the direction of heat transfer, in the order of waste heat utilization type heat source unit (heat exchanger 15 that recovers waste heat from CGS 13 to generate hot water) and non-waste heat utilization type heat source unit (hot water boiler 12). Patent No. 5697481Patent No. 3365999 Configuration diagram of the heat source systemA graph illustrating the logic for changing the target outlet temperature in heat transfer medium supply temperature control.Configuration diagram showing another embodiment of the heat source system Embodiments of the heat source system of the present invention will be described with reference to the drawings. As shown in Figure 1, the heat source system includes a plurality of heat source units 1, a circulation supply path 3 that circulates and supplies the heat transfer medium heated by the plurality of heat source units 1 to the heat demand unit 2, and a control device 4 that controls the operation of each part of the heat source system. In this heat source system, the plurality of heat source units 1 include a waste heat utilization type heat source unit 12 that heats the heat transfer medium using waste heat from a waste heat source 12C, and a non-waste heat utilization type heat source unit 11 that heats the heat transfer medium without utilizing waste heat. The heat demand unit 2 can be, for example, an air conditioning unit that air-conditions the room by exchanging heat between the heat transfer medium cooled or heated by the heat source units 1 and the indoor air. Although not shown in the figure, for example, a plurality of air conditioning units can be provided in parallel in the circulation supply path 3 as the heat demand unit 2. The non-waste heat utilization type heat source unit 11 is, for example, an electric heat pump type heat source unit (abbreviated as EHP, etc.) that heats the heat transfer medium supplied from the circulation supply line 3 by driving the compressor of the heat pump circuit with an electric motor. In this example, the non-waste heat utilization type heat source unit 11 is shown as a pump-integrated type that has a pump built into the circulation supply line 3 for circulating the heat transfer medium, but it is also possible to not have an integrated pump and instead place a primary pump separately in the circulation supply line 3. The heat pump circuit, although not shown in the diagram, consists of a compressor for compressing the refrigerant, an expansion valve for expanding the refrigerant, a heat exchanger on the heat transfer medium side for heating or cooling the heat transfer medium using the heat of condensation or evaporation of the refrigerant, an outside air side heat exchanger for evaporating or condensing the refrigerant in a manner that exchanges heat between the refrigerant and the outside air, and a four-way valve for switching between cooling and heating operations, all arranged in the refrigerant circulation path. During cooling operation, by switching the four-way valve, the refrigerant is passed through the compressor, the outside air side heat exchanger, the expansion valve, and the heat transfer medium side heat exchanger in that order. This causes the heat transfer medium side heat exchanger to function as an evaporator, thereby cooling the heat transfer medium supplied from the circulation supply path 3. During heating operation, by switching the four-way valve, the refrigerant is passed through the compressor, the heat transfer me