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

1st International Conference on Industrial and Manufacturing Engineering

工业技术（总论）;机械制造

Pintoro, A.^1 ; Manik, T.U.H.S.G.^1 ; Sitorus, T.B.^1 ; Sihombing, E.A.^1

Mechanical Engineering, Universitas Sumatera Utara, Medan, Indonesia^1

关键词: Earth-air heat exchangers;    Earthair heat exchanger (EAHE);    Inlet temperature;    Measurement of temperature;    Soil temperature;    Temperature decrease;    Temperature drops;    Theoretical calculations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/505/1/012059/pdf
DOI  :  10.1088/1757-899X/505/1/012059

学科分类：工业工程学

来源: IOP

【 摘 要 】

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.