A detailed building energy analysis tool is used to model the performance of a forced-air system and a radiant floor system. These two systems use a low-temperature tank to store solar energy from a solar collector array. An electrically heated tank at a higher temperature is used to provide any additional heat needed to meet the space heating load. The simulation models developed are then used to compare the performance of the forced-air and radiant floor systems based on maintaining the same operative temperature inside the space. It is found that the portion of the heating load that comes from solar energy is higher in the case of the radiant system. This portion from solar energy increases even further when the operating temperature of the radiant floor is lowered. The results also show that the energy performance of the radiant floor relative to the forced-air system improves for houses with higher envelope R-values and infiltration rates. Given the many different interacting factors that influence the performance of the solar-assisted systems studied, it is very important to use detailed simulation models to help assess which system is more energy efficient for a particular application.
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November 2007
Research Papers
Comparison of the Performance of a Forced-Air and a Radiant Floor Residential Heating System Connected to Solar Collectors
Kamel Haddad,
Kamel Haddad
CANMET Energy Technology Centre
, Ottawa, Ontario, K1A 0E4, Canada
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Julia Purdy,
Julia Purdy
CANMET Energy Technology Centre
, Ottawa, Ontario, K1A 0E4, Canada
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Aziz Laouadi
Aziz Laouadi
National Research Council Canada
, Ottawa, Ontario, K1A0R6, Canada
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Kamel Haddad
CANMET Energy Technology Centre
, Ottawa, Ontario, K1A 0E4, Canada
Julia Purdy
CANMET Energy Technology Centre
, Ottawa, Ontario, K1A 0E4, Canada
Aziz Laouadi
National Research Council Canada
, Ottawa, Ontario, K1A0R6, CanadaJ. Sol. Energy Eng. Nov 2007, 129(4): 465-472 (8 pages)
Published Online: May 1, 2007
Article history
Received:
February 9, 2006
Revised:
May 1, 2007
Citation
Haddad, K., Purdy, J., and Laouadi, A. (May 1, 2007). "Comparison of the Performance of a Forced-Air and a Radiant Floor Residential Heating System Connected to Solar Collectors." ASME. J. Sol. Energy Eng. November 2007; 129(4): 465–472. https://doi.org/10.1115/1.2770754
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