Modeling of Underground Heat Exchanger for Heat Pump and Air Conditioning Systems

Sarwo Edhy S

Abstract


Air conditioning and heat pump systems can use the ground as a medium to dump or absorb heat energy to increase efficiencies. As compared to the air, the ground has lower temperature in the summer and higher in the winter. In this research, the vertical U tube underground heat exchanger that can be used to harvest geothermal energy, has been modeled by using two dimensional finite difference methods. The model is not only able to estimate the water temperatures out of vertical U tube underground heat exchanger, but also capable of calculating the temperature profile change of surrounding soil under various water entering heat exchanger and weather conditions. The heat transfer process between the underground heat exchanger and soil has been investigated and profiles of soil and water temperatures are presented.

Keywords


Modeling; Heat Exchanger; Heat transfer

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JURNAL TEKNIK MESIN UNSYIAH merupakan jurnal ilmiah ilmu pengetahuan dan teknologi, khususnya bidang Teknik Mesin, yang diterbitkan secara berkala dua kali tiap tahun oleh JURUSAN TEKNIK MESIN UNIVERSITAS SYIAH KUALA. Dewan Penyunting mengundang para peneliti, praktisi dan profesional untuk berpartisipasi menyumbangkan artikel pada jurnal ini.