Abstract
Low-temperature geothermal energy is a promising technique for heating and cooling residential and commercial premises, especially since it is one of the green energy solutions that respect the environment. The principle of this technique is based on thermal exchange between the heat pump and the basement using a vertically buried heat exchanger. This is usually made of a U-shaped tube inserted vertically in a borehole made in the ground and filled with a filler material. The purpose of the present study is to vary the different construction materials of the U-tube, the filling material and the soil, in order to obtain the most energy-efficient parameters. The evolution of temperature and heat flux as a function of time has been highlighted for different combinations. Knowing that an experimental study requires a considerable monetary fund, the present model has been validated using previously literature results. Recommendations on the choice of different materials of the geothermal heat exchanger are proclaimed at the end of this work.
Highlights
Seasonal storage systems of solar energy by geothermal well (SSGW) that use the ground as a heat source is a promising and highly efficient renewable energy technology to provide heating and cooling of residential and commercial buildings and sanitary hot water [1, 2]
Most geothermal heat pumps use vertical buried heat exchangers. They offer better energy performance compared to horizontal heat exchangers because of the small temperature fluctuations generated in the ground
It can be noted that thefarteheobtetaminpeedraftuorreth(eTmsatxe=e2l 9tu5b°Ke.)Wanhdileflfuoxr polymers the best results are obtained for HDPE1 with a temperature Tmax=293.97°K and a flux Φmax=172.4W/m2
Summary
Seasonal storage systems of solar energy by geothermal well (SSGW) that use the ground as a heat source is a promising and highly efficient renewable energy technology to provide heating and cooling of residential and commercial buildings and sanitary hot water [1, 2]. This system is generally composed of a heat pump, a solar thermal panel, a geothermal heat exchanger and a system for heat distribution in the building (radiators or heating floor), see Figure 1. They offer better energy performance compared to horizontal heat exchangers because of the small temperature fluctuations generated in the ground
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