Plate-fin Heat Exchangers Used In The Performance Of Thermal Power Air-cooled Unit

Direct air-cooling system of power plant can save water resource, but it has the limitation of low heat exchange efficiency, high energy consumption of mechanical ventilation and the cost of build a power plant is excessive. These limitations prevent direct air-cooling system of power plant to win more market. The article trys to use plate-fin heat exchanger on direct air-cooling system of power plant, and then open out some research to the question. It's find out plate-fin heat exchanger can improve the limitation of direct air-cooling system of power plant which recommend ahead.Firstly, the article build up the calculate model of heat exchange characteristics, flow resistance and economical characteristics of using plate-fin heat exchanger on direct air-cooling system of power plant.And then, it analyze the relation which refer heat exchange area, energy consumption of mechanical ventilation, system volume, air rapidity and fin type of plate-fin heat exchanger used on air-cooling system of power plant.Finally, the article try to prove that plate-fin heat exchanger can improve the limitation of direct air-cooling system of power plant using experiment method.Make use of theoretics and experimental method, the article shows:1. Theoretically, plate-fin heat exchanger used on direct air-cooling system of power plant can improve on heat exchange efficiency, reduce energy expend of mechanical ventilation and the cost of build a power plant. Comparing to a certain power plant, which direct air-cooling system fixed with tube-fin heat exchanger, the power plant, which direct air-cooling system fixed with offset strip fin heat exchanger can advance heat exchange efficiency by 100%~300%.2. While plate-fin heat exchanger used on direct air-cooling system of power plant, the system design air rapidity and air temperature, which come out of exchanger, have a range in which direct air-cooling system of power plant woks well.