【 Weak current College 】 heating and gas supply-chapter summary

This chapter includes heating and gas supply in two parts.　　A heating system, heating system consists of three major components: source, distribution network and the heatsink. There are many kinds of heating system of classification, is divided into different according to the heat and hot water heating and steam heating and hot-air heating.　　Civil architecture is commonly used for heating and hot water and steam heating, hot water heating systems in the wider applicability, therefore applied more generally. The composition of the heating system: heat source equipment (boiler, heat exchanger), thermal equipment and recycling equipment, pipelines and auxiliary equipment and devices, etc.　　You should understand the role of various devices and features.　　Heating boiler types, basic building, technical performance and boiler rooms, and other content is a comprehensive understanding of the fundamentals of heating equipment; heat exchanger of several types: surface type, mixed, regenerative; radiator in column radiator, wing-shaped radiators, convectors steel series Tablet; there are also water pump, expansion tank, gas tank, compensator, trap, pressure relief valve and safety valve, a heating device. Heating system maintenance work has three aspects: the boiler, indoor and outdoor network.　　Common failures are: heating system the end radiator is not hot, local heat sink is not hot, upper radiator not hot, top heatsink overtemperature lower radiator not hot, and so on, for several reasons, specific measures to deal with. 2. gas supply introduces gas manufactured gas, LPG and natural gas three types. Urban gas supply is divided into pipeline and bottled two, pipe network in accordance with the transport of pressure difference is divided into low-voltage distribution network, medium pressure pipe, high pressure pipeline network and high pressure pipeline network.　　Indoor gas pipeline requests to that application. Several common gas appliances and gas meter, gas supply systems maintenance and management, especially for gas safety issues more comprehensive narrative.