Utilization Of Air Through Tunnel In Ventilation And Air Conditioning System Of Buildings

It's a way to utilize renewable energy sources by exploiting air through tunnel.The project of reducing energy consumption using air through tunnel is raised on the situation of developing new energy and renewable energy sources.The prospect is vast.This dissertation analyzes the application prospect of air through tunnel in air conditioning system based on the study of the technology on temperature reduction (rise).First, analyzes and computes distribution character of_soil temperature,including initial and changes of the soil temperature.Second, adopts the concept of the fourth class boundary conditions,that is coupling boundary, which can describe the dynamic linking process between air and soil more actually,and also it can avoid that heat transfer coefficient is not constant in process effectively.The hardcore of this paper is following, in the first place, mathematical model about heat transfer between air and soil is founded.And then program to simulate heat-transfer process under several assumptions,such as non-isothermal and different heat flux. In the simulation, various kinds of factors to temperature reduction(rise) of air through tunnel are analyzed systemictly. Finally, calculate air temperature after heat exchange with soil,which provides theoretical principle for application of air through tunnel in air conditioning system.