General Information
    • ISSN: 1793-821X (Print)
    • Abbreviated Title: J. Clean Energy Technol.
    • Frequency: Quarterly (2013-2014); Bimonthly (Since 2015)
    • DOI: 10.18178/JOCET
    • Editor-in-Chief: Prof. Haider F. Abdul Amir
    • Executive Editor: Ms. Jennifer Zeng
    • Abstracting/ Indexing: EI (INSPEC, IET), Electronic Journals Library, Chemical Abstracts Services (CAS), Ulrich's Periodicals Directory, Google Scholar, ProQuest.
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School of Science and Technology Universiti Malaysia Sabah, Malaysia.
I would like to express my appreciation to all authors, reviewers and editors.

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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