General Information
    • ISSN: 1793-821X (Print)
    • Abbreviated Title: J. Clean Energy Technol.
    • Frequency: Quarterly
    • DOI: 10.18178/JOCET
    • Editor-in-Chief: Prof. Haider F. Abdul Amir
    • Executive Editor: Ms. Jennifer Zeng
    • Abstracting/ Indexing: CNKIElectronic Journals Library, Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, Google Scholar, ProQuest.
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Universiti Malaysia Sabah, Malaysia.
I would like to express my appreciation to all the reviewers and editors, who have been working
very hard to ensure the quality of the journal. It's my honor to work with such a wonderful team.

JOCET 2013 Vol.1(2): 87-90 ISSN: 1793-821X
DOI: 10.7763/JOCET.2013.V1.21

An Investigation of Cooling and Heating Degree-Hours in Thailand

Kriengkrai Assawamartbunlue
Abstract—The simplest well-known method that can be used to preliminarily estimate energy consumption of buildings is the degree-days method that usually requires the knowledge of either annual or monthly cooling and heating degree-days. In this paper, annual and monthly degree-days of 4 major cities in Thailand are investigated based on hourly temperature data in term of “degree-hours.” Long-term hourly temperature data for 15 years (1994-2008) are used to calculate degree-hours at various base temperatures. The Sandia method is used to make annual hourly temperature dataset that can represent a typical hourly temperature year instead of using long-term average hourly temperature. The results show that Bangkok has the highest annual and monthly cooling degree-hours followed by Songkla, Ubonratchathani, and Chiangmai. In all cities, the number of cooling degree-hours is much more than one of heating degree-hours which implies that energy consumption of buildings is used for space cooling much more than space heating. Regression models are also developed for determining annual cooling and heating degree-hours at any base temperature.

Index Terms—Cooling degree-hours, degree-days, heating degree-hours, Thailand, typical meteorological year

Kriengkrai Assawamartbunlue is with Energy Technology Research Group, Mechanical Engineering Department, Kasetsart University, Thailand 10900 (e-mail:


Cite:Kriengkrai Assawamartbunlue, "An Investigation of Cooling and Heating Degree-Hours in Thailand," Journal of Clean Energy Technologies vol. 1, no. 2, pp. 87-90, 2013.

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