TY - JOUR
TI - Characteristics of geothermal energy obtained from a deep well in the coldest provincial capital of China
AU - Zhang Yaning
AU - Zhao Wenke
AU - Jin Guangri
AU - Li Bingxi
AU - Kim Yong-Song
AU - Xie Gongnan
AU - Fan Xinmeng
AU - Fu Zhongbin
JN - Thermal Science
PY - 2018
VL - 22
IS - 12
SP - 673
EP - 679
PT - Article
AB - The abundantly available renewable geothermal energy resources play an  important role in people’s life in the applications of hot water supply,  greenhouse heating, air conditioning, electricity generating, breeding,  incubating, drying, irrigating, refrigeration, and so on. This study  investigated the characteristics of geothermal energy obtained from a 100 m  deep well in Harbin, the coldest provincial capital of China. The effects of  air temperature, wind scale, and fluid velocity were also studied. When the  air temperature varied in the range of -21.76 ~ -15.27 oC and the wind scale  was in the range of 2-5, the tube and soil temperatures varied in the ranges  of -1.3~1.8, 3.9~4.6, 6.6~7.7, 7.7-8.7, 8.9~9.8, 10.4~11.3, 11.9~13.1, and  13.4~14.8 oC for the well depths of 1, 5, 10, 20, 40, 60, 80, and 100 m,  respectively. Ambient conditions had significant effect on the soil  temperature above 1 m whereas nearly no effect on the soil temperature under  5 m. When the fluid velocities were between 0.09 m/s and 0.18 m/s, the tube  temperatures reached stable within one hour, and the fluid velocity had  slight effect on the tube temperatures. The results obtained from this study  offer precious geothermal energy information for the cold regions of China  and also the whole world.