Design Selection Method of Exhaust Air Heat Recovery Type Indirect Evaporative Cooler

In order to promote the engineering application of indirect evaporative cooling (IEC) in field building air conditioning, as well reduce conditioning energy consumption and carbon emissions, this paper proposes a fresh unit using achieve heat recovery from exhaust air, which gives recommended values spray water operation parameters. The cooler mass transfer mathematical model numerical solution procedure were made. summer outdoor design conditions, outlet state parameters, capacity, load, wet bulb efficiency enthalpy numerically solved for thirty typical cities five climate zones China. addition, also based on results China, two representative operating conditions points medium high humidity selected. Eight models coolers volume range 1000–10,000 m3/h commonly used simulated obtain optimal area size selection ERIEC exchangers units, economic analysis was performed. show that ranges 0.67–0.98, increases temperature decreases; 0.76–1.29, increases; load type can bear 55–100%, could largely decrease cold matched surface cooler. As demonstrated, energy-saving effect is remarkable.