What Is a Heat Source?

Heat source, thermodynamics refers to a system with a large heat capacity. It can be used as both a heat source for taking out heat and a heat sink for inputting heat, and the temperature does not change when it is radiated to or taken from it, so the process carried out in the heat source can be regarded as a reversible process. Safety engineering believes that any system or process that can generate a certain amount of thermal energy can be considered a heat source. The heat source often increases the temperature or pressure of the system or system, or directly causes combustion and explosion. ^[1]

Urban heating can be divided into two types: distributed heating and centralized heating. Decentralized heating includes single-family, single-building, and small unit self-supply. Centralized heating is divided into districts based on load nature, quantity, supply target and scope, terrain and terrain, and surrounding conditions. Units and residential areas implement district heating. ^[2]

(1) The heating mode of small towns can be divided into centralized heating and distributed heating, and it should be determined based on relevant factors such as user distribution, heating conditions, and fuel used. The scope of centralized heating should be used when conditions warrant, and centralized heating should be selected. In this way, decentralized residential buildings on the edge of towns can adopt decentralized heating.

(2) The heat source for heating in selected small towns may include thermal power plants, heating boiler rooms, industrial waste heat, geothermal, solar energy, wind energy, electricity, waste heat from waste incineration plants, etc.

(3) The heat sources of small cities and towns within the planning area of large and medium-sized cities should be considered in accordance with the overall urban planning. The heat sources of heat supply of small towns in densely populated areas should be coordinated with the relevant areas for joint planning and sharing.

(4) Small towns and large-scale small towns with a certain perennial industrial heat load should choose thermal power plants for centralized heating. County towns and central towns in conditional areas can adopt the triple supply model for heat supply planning.

(5) There is no thermal power plant nearby, and small towns with heating load as the main source should choose district hot water boiler room for heating.

(6) It is suitable to build a steam boiler room for steam and heat supply in a small town industrial park with a small industrial steam heat load.

(7) Small towns with conditions should use heat sources such as industrial waste heat, geothermal heat, solar energy, and waste incineration plants as much as possible. ^[6]