NR  Vol.5 No.13 , October 2014
Achieving Cooler Soil as an Effective Heat Sink for Earth-to-Air Heat Exchanger (EAHE) Cooling Technology in Malaysia Tropical Climate
ABSTRACT
This research is intended to explore the capacity of Malaysia soil in becoming a more effective heat sink for the application of Earth-to-Air Heat Exchanger (EAHE) Cooling Technology in Malaysia. EAHE Cooling Technology consists of buried pipes underground where the ambient air is channeled through from the pipe inlet and produces cooler air at its outlet. Within the buried pipes, heat exchange process occurs between the air and the soil that surrounding the pipe. This building cooling technology has been applied in many countries, mostly in temperate or hot and arid climate where the diurnal temperature is large. However, minimal resources were found on the study of EAHE application to buildings in Malaysia, hence there is room to develop. A parametric study on EAHE cooling application in Malaysia was done through field experiment and concluded that among many parameters affecting the technology performance, the soil temperature which surrounded the pipe was the most influential factor. The study recommended to further reduce the soil temperature to achieve a cooler outlet temperature. In response to that, this research conducted a parametric study of soil temperature under three different soil surface conditions: bare, shaded with timber pallettes and insulated with used tyres at 1.0 m and 1.5 m underground. The data was logged for a month and the result has shown significant reduction in the soil temperature underground below the shaded and insulated soil surface as compared to below bare soil surface condition. The insulated soil surface produced the best result where the soil temperature was reduced up to 26.9°C. The main contribution of this paper is to highlight that the soil surface treatment can be used to reduce solar heat gain within the soil underground and thus improving the performance of EAHE Cooling Technology particularly for the application in Malaysia tropical climate.

Cite this paper
Sanusi, A. and Ahmad Zamri, A. (2014) Achieving Cooler Soil as an Effective Heat Sink for Earth-to-Air Heat Exchanger (EAHE) Cooling Technology in Malaysia Tropical Climate. Natural Resources, 5, 804-809. doi: 10.4236/nr.2014.513069.
References
[1]   Krishnan, G. (2007) Putrajaya Is 5°C Hotter than Other Local Cities. The Star Archives.
http://www.thestar.com.my/story.aspx/?file=%2f2007%2f6%2f19%2fcentral%2f17992083&sec=central

[2]   Chan, S.A. (2004) Energy Efficiency—Designing Low Energy Buildings Using Energy 10. CPD Seminar, Pertubuhan Arkitek Malaysia, Kuala Lumpur.

[3]   Mihalakakou, G., Santamouris, M., Asimakopoulos, D. and Tselepidaki, I. (1995) Parametric Prediction of the Buried Pipes Cooling Potential for Passive Cooling Applications. Solar Energy, 55, 163-173.
http://dx.doi.org/10.1016/0038-092X(95)00045-S

[4]   Ghosal, M.K. and Tiwari, G.N. (2006) Modelling and Parametric Studies for Thermal Performance of an Earth to Air Heat Exchanger Integrated with Greenhouse. Energy Conversion and Management, 47, 1779-1798.
http://dx.doi.org/10.1016/j.enconman.2005.10.001

[5]   Krarti, M. and Kreider, J.F. (1996) Analytical Model for Heat Transfer in an Underground Air Tunnel. Energy Conversion and Management, 37, 1561-1574.
http://dx.doi.org/10.1016/0196-8904(95)00208-1

[6]   Reimann, G., Boswell, H. and Bacon, S. (2007) Ground Cooling of Ventilation Air for Energy Efficient House in Malaysia: A Case Study of The Cooltek House. Conference on Sustainable Building South-East Asia (SB07SEA 5th to 7th), Kuala Lumpur, 5-7 November 2007.

[7]   Sanusi, A.N.Z., Shao, L. and Ibrahim, N. (2013) Passive Ground Cooling System for Low Energy Buildings in Malaysia (Hot and Humid Climates). Renewable Energy, 49, 193-196.
http://dx.doi.org/10.1016/j.renene.2012.01.033

[8]   Givoni, B. (2007) Cooled Soil as a Cooling Source for Buildings. Solar Energy, 81, 316-328.
http://dx.doi.org/10.1016/j.solener.2006.07.004

[9]   Sanusi, A.N.Z. (2012) Low Energy Ground Cooling System for Buildings in Hot and Humid Malaysia. Ph.D. Thesis, International Islamic University Malaysia and De Montfort University, UK.

[10]   http://www.onsetcomp.com/products/data-loggers/ua-001-08

[11]   Banks, D. (2008) An Introduction to Thermogeology: Ground Source Heating and Cooling. Blackwell, UK.

 
 
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