화학공학소재연구정보센터
Renewable Energy, Vol.147, 447-463, 2020
Coupling a Hydronic Heating Pavement to a Horizontal Ground Heat Exchanger for harvesting solar energy and heating road surfaces
The traditional method for anti-icing roads is distributing salt and sand. However, the method causes environmental pollution and damages to road infrastructures. A renewable alternative method for winter maintenance of roads is to use Hydronic Heating Pavement (HHP), coupled to a Ground Heat Exchanger (GHE). The aim of this paper is to examine the feasibility of the coupled HHP system to a Horizontal GHE (HGHE) for harvesting solar energy during summer and anti-icing road surfaces during winter. A hybrid 3D numerical simulation model is used to analyze the harvesting and anti-icing operations. Furthermore, a 2D numerical simulation model is used to calculate the heat loss from the HGHE to the surrounding ground. The climate data are obtained from Ostersund, a city in the middle of Sweden with long and cold winter period. The results showed that the amount of harvested solar energy during summer is, on average, 99 kWh /(m(2) .year). Less than 10% of this energy is lost to the surrounding ground. In addition, the required energy for anti-icing the road surface is 75 kWh /(m(2 ).year). Applying this amount of energy for anti-icing the road surface results in remaining, on an annual average, 580 h of slippery condition on the road surface. (C) 2019 Elsevier Ltd. All rights reserved.