It consists of speed fan and heat exchanger coil two parts, fan is generally composed of forward tilting blade and low noise motor, generally three wind speed, motor for the tapping speed, by speed switch on different tapping, control the motor operating voltage to realize the speed control. Coil is a high-efficiency finned heat exchanger, which is made of purple copper tube and hydrophilic aluminum fins by high-pressure expansion, and it is the component of cooling and heating air, in addition to condensate tray, air filter and other accessories.

The main equipment of the cooling water system includes two cooling towers and three cooling water circulation pumps.

Duct is a piping system used for air transportation and distribution, usually used in air conditioning system, ventilation system, industrial exhaust system and so on. According to the shape of the cross-section can be divided into round duct, rectangular duct, flat round duct and so on, of which the round duct resistance is the smallest but the height of the largest size, the production is complex. Therefore, the application of rectangular air duct is mainly.

This paper analyzes the causes of vibration for the vibration of the various components of the pump unit. From the pump hydraulic, mechanical structure design, to the pump installation, operation, maintenance and other aspects of several proposed measures to reduce pump vibration.

Chifeng City is the first city in China where the government has led and issued a document uniformly requesting all urban areas to carry out end-to-end large-temperature difference renovation, which plays a very important role in demonstrating the realization of low-carbon heat supply. This paper introduces the cause and realization process of large temperature difference heating in Chifeng city center, and combines the local endowment of waste heat and renewable resources, under the guidance of the above requirements, the program and implementation steps of near-zero carbon heating can be developed according to local conditions.