Abstract: Provided is a boiler including a heat generation body, a container including the heat generation body, and a water pipe to be heated by heat generated by the heat generation body under environment where the inside of the container is filled with gas with higher specific heat than that of air.

Abstract: Provided is a boiler for heating fluid by a heat generation unit including heat generation bodies in a container, the boiler being able to moderately heat fluid according to various situations while heat generated by the heat generation bodies can be efficiently utilized. A boiler for heating fluid by using heat generated by heat generation bodies includes the heat generation bodies and a container having the heat generation bodies inside and configured such that the inside of the container is filled with gas with higher specific heat than that of air. The boiler includes a controller configured to control a heat generation amount of the heat generation body under a situation where the gas has been supplied into the container.

Abstract: Provided is a boiler configured to perform heating by a heat generation section provided with heat generation bodies in a container and capable of properly charging a circulation path including, as part thereof, the inside of the container with required gas. A boiler includes: heat generation bodies; a container configured such that the heat generation bodies are provided inside and configured chargeable with gas with higher specific heat than that of air; and a circulation path including, as part thereof, the inside of the container, the circulation path being a path in which gas circulates. When the charging process of charging the circulation path with the gas is performed, a circulation amount and a gas concentration in the circulation path are monitored.

Abstract: Provided is a boiler configured to perform heating by a heat generation section provided with heat generation bodies in a container and capable of properly charging a circulation path including, as part thereof, the inside of the container with required gas. A boiler includes: heat generation bodies; a container configured such that the heat generation bodies are provided inside and configured chargeable with gas with higher specific heat than that of air; and a circulation path including, as part thereof, the inside of the container, the circulation path being a path in which gas circulates. When the charging process of charging the circulation path with the gas is performed, a circulation amount and a gas concentration in the circulation path are monitored.

Abstract: A supply-water warming system includes a steam compression heat pump circuit, a heat recovery heat exchanger, a heat source fluid line in which heat source fluid flows in the heat recovery heat exchanger and the evaporator in this order, a water supply line in which supply water flows in the heat recovery heat exchanger and the condenser in this order, a refrigerant flow rate adjustment section controlled based on the superheat degree of gas refrigerant flowing into the compressor and configured to adjust a refrigerant flow rate, a supply water flow rate adjustment section controlled based on the tapping temperature of the supply water flowing out of the condenser and configured to adjust a supply water flow rate, and a control section configured to control the refrigerant flow rate adjustment section and the supply water flow rate adjustment section.

Abstract: Provided is a boiler for heating fluid by a heat generation unit including heat generation bodies in a container, the boiler being able to moderately heat fluid according to various situations while heat generated by the heat generation bodies can be efficiently utilized. A boiler for heating fluid by using heat generated by heat generation bodies includes the heat generation bodies and a container having the heat generation bodies inside and configured such that the inside of the container is filled with gas with higher specific heat than that of air. The boiler includes a controller configured to control a heat generation amount of the heat generation body under a situation where the gas has been supplied into the container.