A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Enhancing heat release of asphalt pavement by a gradient heat conduction channel
Highlights A new gradient heat conduction channel (GHCC) structure was first proposed here. The structure can gather heat from asphalt pavement into the small channels. The structure can induce and drive accumulation heat in a directional migration way. It provides a new principle of active cooling for asphalt pavement.
Abstract In order to enhance the heat transfer efficiency in asphalt pavement along a directional way, a gradient heat conduction channel structure (GHCC) was suggested and analyzed in this paper. The designed structure could gather heat from asphalt pavement into the channel and quickly transfer it to its subgrade along the axis of these channels in the pavement. Thermal analyses of GHCC were performed by a finite element method. The results showed that the maximum heat release of pavement with GHCC could be increased by 11.5 times. And the pavement temperatures at the upper surface and 4 cm were reduced by 2.1 °C and 6.1 °C, respectively. And the maximum downward heat transfer efficiency of the structure could be increased by 17.6 times. A strong horizontal heat flow was observed which was caused by a significant heat exchange between the channels and the surrounding asphalt mixtures. In order to verify the laboratory cooling effect of the structure, a laboratory irradiation experiment was also employed to verify the principles and models of the GHCC. All of these analytical tests showed that establishing the GHCC in asphalt pavements is a promising method to enhance heat release efficiency, endowing asphalt pavement with more active cooling function.
Enhancing heat release of asphalt pavement by a gradient heat conduction channel
Highlights A new gradient heat conduction channel (GHCC) structure was first proposed here. The structure can gather heat from asphalt pavement into the small channels. The structure can induce and drive accumulation heat in a directional migration way. It provides a new principle of active cooling for asphalt pavement.
Abstract In order to enhance the heat transfer efficiency in asphalt pavement along a directional way, a gradient heat conduction channel structure (GHCC) was suggested and analyzed in this paper. The designed structure could gather heat from asphalt pavement into the channel and quickly transfer it to its subgrade along the axis of these channels in the pavement. Thermal analyses of GHCC were performed by a finite element method. The results showed that the maximum heat release of pavement with GHCC could be increased by 11.5 times. And the pavement temperatures at the upper surface and 4 cm were reduced by 2.1 °C and 6.1 °C, respectively. And the maximum downward heat transfer efficiency of the structure could be increased by 17.6 times. A strong horizontal heat flow was observed which was caused by a significant heat exchange between the channels and the surrounding asphalt mixtures. In order to verify the laboratory cooling effect of the structure, a laboratory irradiation experiment was also employed to verify the principles and models of the GHCC. All of these analytical tests showed that establishing the GHCC in asphalt pavements is a promising method to enhance heat release efficiency, endowing asphalt pavement with more active cooling function.
Enhancing heat release of asphalt pavement by a gradient heat conduction channel
Jiang, Lei (author) / Wang, Shengyue (author)
2019-09-15
Article (Journal)
Electronic Resource
English
| European Patent Office | 2022
Cooling asphalt pavement by a highly oriented heat conduction structure
| Online Contents | 2015
Cooling asphalt pavement by a highly oriented heat conduction structure
| Elsevier | 2015
Unilateral heat-transfer asphalt pavement for permafrost protection
| Online Contents | 2012