Study on the Performance of Thermoelectric Heat Recovery Fresh Air Device Based on Micro Heat Pipe Array
A thermoelectric heat recovery device,which uses a micro heat pipe array to realize efficient heat transfer to heat the return air to heat the fresh air,was proposed.In the enthalpy difference laboratory,the performance test platform of a new type of heat and heat recovery fresh air device was built to study the performance of the heat recovery device,and analyze its influencing factors.The results show that the fresh air volume is 280 m3/h.The temperature rise of fresh air reaches the maximum value of 10.87 ℃ under a inlet air temperature of 10℃ and the input electric power of 550 W.Under a fresh air inlet temperature of 0 ℃ and input electric power of 550 W,the maximum heating capacity of the device reaches 1 255.8 W.The energy recovery ratio of the experimental conditions varies from 1.87 to 12.48.When the input power increases by 50 W,the outlet temperature increases by about 0.63 ℃,and the energy recovery ratio decreases rapidly.When the inlet temperature of fresh air decreases by 1 ℃,the outlet temperature decreases by 0.8℃,and the heating capacity and ERC increase.When air volume from 110 m3/h increased to 280 m3/h,the heating capacity and ERC increase,the outlet temperature decreases by 7.5 ℃,and the pressure drop also increases by 47.32 Pa.After analyzing the heat transfer mechanism of the device,the relationship between the supply air temperature,the inlet air temperature,and the input electrical power was fitted using experimental data as samples,providing a theoretical reference for its practical engineering application.The research results provide technical support for achieving energy-efficient supply of fresh air,and new ideas for buildings to reduce operational energy consumption and carbon emissions.
fresh air systemthermoelectric heat recoverymicro heat pipe arrayperformance testingtheoretical analysis
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