Effect of Wet Soil on Thermal Performance of Air-Fluid Ground Heat Exchanger for Heating

Year 2019, Volume: 23 Issue: 5, 924 - 928, 01.10.2019

Ufuk Durmaz , Orhan Yalçınkaya , Ozlem Bablak Ergun Mustafa Ozdemir

https://doi.org/10.16984/saufenbilder.541815

Abstract

The energy crises
that emerged after the economic problems in the world increased the interest in
alternative energy resources. The effects of global warming, which has a
serious threat, will be reduced by the more efficient use of these energy
resources. In this study, the thermal effects of wet soil were investigated
experimentally using a ground source heat exchanger (GHE), which is an
alternative energy resource, in an area on the Esentepe campus of Sakarya
University. Researches on this subject are mostly directed to dry soil
applications. In this research, the performance of soil in an artificial pool
was examined in terms of heat transfer. By means of the artificial pool formed
under the ground, it is aimed to increase in heat transfer between the soil and
the process fluid. In the experiments which are conducted, air is used as the
process fluid. The system has a significant advantage in certain temperature
ranges due to the passive heating method, in other words, the process fluid can
be circulated under the soil without using a compressor. The purpose of this
method is to reduce the cost of heating in the winter season. The temperature
difference at GHE inlet and outlet is approximately 9.07 °C in the experiments.
The heat transfer rate has been increased by 46.28% compared to dry soil
application for the same air velocity speed.

Keywords

ground base heating, earth air heat exchanger, wet soil

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