Refrigeration, HVAC, air conditioning, oil cooling and other industries; Heat treatment plants and copper welding plants; Automobile component manufacturers, mechanical hardware and injection molding machine manufacturers, home appliance and air conditioning factories, the shipbuilding industry, etc. A. Refrigeration: Used as a condenser and evaporator. b. HVAC: Intermediate heat exchangers used in conjunction with boilers, intermediate heat exchangers in high-rise buildings, etc. c. Chemical industry: soda ash industry, ammonia synthesis, alcohol fermentation, resin synthesis cooling, etc. d. Metallurgical industry: Heating or cooling of aluminate mother liquor, cooling in steelmaking processes, etc. e. Machinery industry: Cooling of various quenching fluids, cooling of lubricating oil for reducers, etc. f. Electric Power industry: Cooling of high-voltage transformer oil, generator bearing oil, etc. g. Papermaking industry: Heat recovery in bleaching processes, heating of pulping liquid, etc. h. Textile industry: Cooling of viscose filament alkaline water solution, cooling of boiling nitrocellulost, etc. i. Food Industry: Sterilization and cooling of fruit juice, heating and cooling of animal and vegetable oils, etc. j. Oil processing: Soap base is dried under normal pressure, and various process liquids are heated or cooled. k. Centralized heating: Waste heat from thermal power plants is used for district heating to heat water for bathing. l. Others: Petroleum, medicine, shipping, seawater desalination, geothermal utilization