Abstract:

The research analyzed the feasibility of using air in an underground tunnel as cold and heat sources of heat pumps, modeled building of tunnel heat transfer, obtained  internal  and external boundary conditions, then simplified and solved it with Laplace mathematics transform, and obtained  the heat exchange formula of air passing through a tunnel. Then modeled physical building of the temperature environment and obtained boundary conditions, and used FLUENT software to numerically simulate with dynamic boundary conditions, then obtained  the results and compared then with  experimental  data, and finally found dynamic heat transfer characteristics and some key problems of using air in an underground tunnel as cold and heat sources of heat pumps. It can provide some practical help on tunnel wind cooling technology and heat transfer, simulate calculating of using air in underground tunnel as cold and heat sources of heat pumps, and also on  saving energy consumption and environmental protection research.

Key words: underground, temperature, characteristic, tunnel, cooling