Heat Lump in Different Pavement Layer Using Ethylene Glycol as A Solar Heat Collector

Siti Hidayah Abu Talib,Anis Farhah Maidin,Muhammad Salleh Abustan,Syarifah Intan Najla Syed Hashim,Salmia Beddu,A Hasan,Al-K Hj Othman,N Mohamed Sutan,C.N Hipolito,Md A Mannan,N Abdul Wahab,A.A Khan,M.R Kabit

doi:10.1051/matecconf/20178701015

Abstract

Due to the hot weather in Malaysia, several studies being carried out regarding solar energy harvesting and use as a noble renewable energy. Therefore, researchers start developing various methods to utilize sun's heat as a renewable source of energy. Solar energy has been always concern researchers to develop most effective, durable and cheap methods and materials to be used as solar energy collectors in road pavements. Therefore, this study was conducted to determine the maximum heat area using ethylene glycol. The study was involved the field monitoring of the six samples of asphalt slab with stainless steel pipe with ethylene glycol and empty pipe act as the controlled sample. The pipe was arranged in three different depths of 50mm, 100mm and 150mm and keeping controlled the pipe diameter and the size of slab of 20mm and 300mm x 300mm respectively. These results show that the maximum heat extraction by the ethylene glycol was at a depth 150mm which was 51.2°C. The average percentage increments of the pipe with ethylene glycol for three days for pipe depth 50mm was 71%, while for pipe at depth 100mm and 150mm were 78% and 62% respectively. The ethylene glycol effect was more noticeable compare to the pipe without ethylene glycol and can store more heat. For the strength of pipe, the highest maximum load bearing capacity that can be supported by the stainless steel pipe was at depth 50mm and the second highest was at a depth 100mm while the third highest was at depth 150mm. So, the suitable depth to install the pipe with the consideration of both cases which was maximum heat gain and the maximum load that can be supported was at depth 50mm.

Highlights

Asphalt pavement as a solar collector was believed to be one of the most efficient techniques of harvesting solar energy by collecting solar radiations that hit the pavement throughout all day long and cause the pavement to contain amounts of heat energy which can be utilized and used for many purposes
The result had been analyzed in order to achieve the research objectives which are to obtain maximum heat extraction of solar collector in different pipe depth and to determine the maximum strength of steel pipe to withstand loading
The ethylene glycol effects were more noticeable at the period between 12 to 3pm where the maximum sun heat radiations are more likely to hit the surface of the pavement

Summary

Introduction

Asphalt pavement as a solar collector was believed to be one of the most efficient techniques of harvesting solar energy by collecting solar radiations that hit the pavement throughout all day long and cause the pavement to contain amounts of heat energy which can be utilized and used for many purposes. In European countries, asphalt pavement as a solar collector is used for heating and melting the snow. The implementation of natural source of energy is more favourable due to its availability, environmental friendly and cost effective. Asphalt collector is used for heating and cooling the buildings. High temperature in asphalt pavement may lead to the global warming. Renewable energy technologies are likely to become more important as other energy sources become depleted and the cost of power generation using fossil fuels rises. In most cases, renewable energy technologies require high initial investments that may deter potential users. Asphalt Solar Collector potentially offer a low-cost solution to sustainable and clean energy generation by using pavement infrastructure

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