The experimental study and numerical of pipe finned as a earth-air heat exchangers

Abstract

Earth-Air Heat Exchanger (EAHE) is cooling hot air by utilizing cold soil temperatures. This research was conducted to determine the out temperature (Tout) on the pipe for each variation of the inlet temperature (Tin) and variety of the inlet fluid velocity. In this research, the comparison between the experimental results and the results of theoretical calculations. In this study the air velocity of entry was adjusted using blowers and for measurement of temperature in pipes using thermocouples. From the experimental results of out temperature (Tout) at the tube with air velocity of 1 m/s is relatively the same as the result of theoretical calculation, the temperature decrease reaches temperature of ± 25 C, while for out temperature (Tout) experimental result using air velocity of 3 m/s tends to be higher than the exit temperature (Tout) on the theoretical calculation, ie only reaches a temperature drop at a point of ± 26 °C. The decrease in temperature of the underground culverts affects the length of pipe used in the research because the more air passes the pipe surface air, the faster the heat transfer between the air and the pipe wall occurs.

Experimental studies on natural bank type heating/cooling energy saving Air conditioning system

“…Numerical modeling [20][21][22][23] and analytical modeling at different parametric values using different configurations have been done to a large extent. Most of the experiments have been performed with pipes laid in a straight line [24][25][26][27][28][29][30][31][32][33][34][35] and serpentine style [36][37][38][39] in both open mode 40 and closed mode 41 to study their usefulness. Large space requirement is a significant constraint for that.…”