供热工程（Heating engineering）.doc

供热工程（Heating engineering） The preface and the first chapter set The basic concept 1. Heat supply engineering: heating system and central heating system that provide heat energy for heating system with hot water or steam. 2, heating system, based on the technology of artificial heat source of heat to heat the user by HTM pipeline of a cooling device, as required by the building supply heat, in order to maintain indoor temperature and humidity, to create suitable living conditions or work environment. 3, the central heating system (heat source, heat supply network and heat users) : is produced by the heat of steam, hot water through the pipe network to supply heat users use the heating way of production and life, it is composed of three parts of heat, heat supply network and heat users. 4. Cogeneration of heat and electricity: the technology that USES the high grade thermal energy of fuel to generate electricity, and then USES the energy of low-grade thermal energy. 5. Seasonal load: heat load of heating, ventilation and air conditioning system belongs to seasonal heat load. 6, perennial heat load: the heat and production process system is used for heat and heat. 7. Thermal load diagram: it is used to represent the thermal load of the whole heat source or thermal user system with outdoor temperature or time. Question: what is the difference between a heating system and a central heating system? Hot water heating system The basic concept Equivalent length method: the local loss of the pipe segment is converted into a fairly long straight pipe section 2. Main trunk: the lowest average friction in the hot water network. Economic friction: ensure that the total cost of the prescribed period of calculation is higher than that of friction Imbalance: 4. Dynamic water pressure line: indicates the pressure distribution of heating system under running state. 5. Hydrostatic pressure line: indicates the pressure distribution of the heating system when it stops running. 6. Backwat