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Influence of pervious pavement systems on heat dissipation from a horizontal geothermal system

Due to increasing energy demands, leading countries have focused on finding renewable energy sources. Geothermal Energy is a renewable, efficient, reliable and proven energy source for heating and cooling buildings. Among all the geothermal heat exchanger systems, geothermal paving systems couple the benefits of a permeable pavement system and a horizontal heat exchanger. This paper analyses the influence of different paving surfaces and sub-bases on the thermal performance of pavement section using a newly developed laboratory test. According to the temperature profiles observed, porous asphalt surface and limestone gravel sub-base combine to produce a system which insulates the most under ambient air conditions, while interlocked concrete block pavement surface and plastic cell sub-base dissipated the most heat.