Heat exchanger is an energy-saving device that transfers heat between two or more fluids with different temperatures. It is one of the main equipment to transfer heat from high temperature fluid to low temperature fluid, so that the fluid temperature can meet the requirements of process conditions, and it is also one of the main equipment to improve energy utilization. The heat exchanger industry involves nearly 30 industries such as HVAC, pressure vessels, water treatment equipment, chemical industry and petroleum, and forms an industrial chain with each other. According to the data, the market scale of heat exchanger industry in China in 20 10 is about 50 billion yuan, mainly concentrated in the fields of petroleum, chemical industry, metallurgy, electric power, shipbuilding, central heating, refrigeration and air conditioning, machinery, food, pharmacy and so on. Among them, the petrochemical industry is still the largest market in the heat exchanger industry, with a market scale of 654.38+0.5 billion yuan; The market size of heat exchangers in the field of electric metallurgy is about 8 billion yuan; The market scale of heat exchangers in shipbuilding industry is more than 4 billion yuan; The market size of heat exchangers in machinery industry is about 4 billion yuan; The market scale of heat exchangers in central heating industry exceeds 3 billion yuan, and the food industry also has a market of nearly 3 billion yuan. In addition, a large number of special heat exchangers are needed in space vehicles, semiconductor devices, nuclear power conventional islands, wind turbines, solar photovoltaic power generation, polysilicon production and other fields, and these markets are about 654.38+03 billion yuan. The domestic heat exchanger industry has made remarkable achievements in saving energy and increasing efficiency, improving heat transfer efficiency, reducing heat transfer area, reducing pressure drop and improving thermal strength of equipment. Based on the steady demand for heat exchangers in petroleum, chemical industry, electric power, metallurgy, shipbuilding, machinery, food, medicine and other industries, the heat exchanger industry in China will maintain steady growth in the future. From 20 1 1 to 2020, the heat exchanger industry in China will maintain an average annual growth rate of about 10- 15%. ?