Accurate modeling of hourly heating and cooling energy use in commercial buildings can be achieved by a Generalized Fourier Series (GFS) approach involving weather variables such as dry-bulb temperature, specific humidity and horizontal solar flux. However, there are situations when only temperature data is available. The objective of this paper is to (i) describe development of a variant of the GFS approach which allows modeling both heating and cooling hourly energy use in commercial buildings with outdoor temperature as the only weather variable and (ii) illustrate its application with monitored hourly data from several buildings in Texas. It is found that the new Temperature based Fourier Series (TFS) approach (i) provides better approximation to heating energy use than the existing GFS approach, ((ii) can indirectly account for humidity and solar effects in the cooling energy use, (iii) offers physical insight into the operating pattern of a building HVAC system and (iv) can be used for diagnostic purposes.
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February 1999
Research Papers
A Fourier Series Model to Predict Hourly Heating and Cooling Energy Use in Commercial Buildings With Outdoor Temperature as the Only Weather Variable
A. Dhar,
A. Dhar
Enron Corporation, 1400 Smith St., Houston, TX 77002
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T. A. Reddy,
T. A. Reddy
Drexel University, Civil and Architectural Engineering Dept., Philadelphia, PA 19104
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D. E. Claridge
D. E. Claridge
Energy Systems Laboratory, Texas A&M University, College Station, Texas
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A. Dhar
Enron Corporation, 1400 Smith St., Houston, TX 77002
T. A. Reddy
Drexel University, Civil and Architectural Engineering Dept., Philadelphia, PA 19104
D. E. Claridge
Energy Systems Laboratory, Texas A&M University, College Station, Texas
J. Sol. Energy Eng. Feb 1999, 121(1): 47-53 (7 pages)
Published Online: February 1, 1999
Article history
Received:
September 1, 1995
Revised:
September 1, 1998
Online:
February 14, 2008
Citation
Dhar, A., Reddy, T. A., and Claridge, D. E. (February 1, 1999). "A Fourier Series Model to Predict Hourly Heating and Cooling Energy Use in Commercial Buildings With Outdoor Temperature as the Only Weather Variable." ASME. J. Sol. Energy Eng. February 1999; 121(1): 47–53. https://doi.org/10.1115/1.2888142
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