TY - GEN
T1 - Effect of solar radiation control on electricity demand costs—an addition to the DOE cool roof calculator
AU - Petrie, Thomas W.
AU - Wilkes, Kenneth E.
AU - Desjarlais, André O.
N1 - Publisher Copyright:
© 2004 ASHRAE.
PY - 2004/1/1
Y1 - 2004/1/1
N2 - Two versions of the DOE Cool Roof Calculator are on the Internet to assist in the selection of an energy-saving surface for low-slope roofs. The CoolCalcEnergy version, for small and medium-sized commercial facilities, gives savings based on costs per unit of energy. This paper documents how the CoolCalcPeak version was added to include estimates of savings in demand charges that large facilities often incur for electricity. The database for the Cool Roof Calculator was reworked. Differences in peak deck heat fluxes with and without solar radiation control were obtained over the cooling season for varying locations (as characterized by average solar insolation), R-value of the low-slope roof, and solar reflectance and infrared emittance of the roof surface. Peak solar insolation is relatively constant over the U.S. Thus, lower demand charges save about the same amount of annual operating costs for a particular set of circumstances in all U.S. climates that have significant cooling requirements.
AB - Two versions of the DOE Cool Roof Calculator are on the Internet to assist in the selection of an energy-saving surface for low-slope roofs. The CoolCalcEnergy version, for small and medium-sized commercial facilities, gives savings based on costs per unit of energy. This paper documents how the CoolCalcPeak version was added to include estimates of savings in demand charges that large facilities often incur for electricity. The database for the Cool Roof Calculator was reworked. Differences in peak deck heat fluxes with and without solar radiation control were obtained over the cooling season for varying locations (as characterized by average solar insolation), R-value of the low-slope roof, and solar reflectance and infrared emittance of the roof surface. Peak solar insolation is relatively constant over the U.S. Thus, lower demand charges save about the same amount of annual operating costs for a particular set of circumstances in all U.S. climates that have significant cooling requirements.
UR - http://www.scopus.com/inward/record.url?scp=85059784493&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:85059784493
T3 - Thermal Performance of the Exterior Envelopes of Whole Buildings
BT - Buildings IX
PB - American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE)
T2 - 9th International Conference on Thermal Performance of Exterior Envelopes of Whole Buildings 2004
Y2 - 5 December 2004 through 10 December 2004
ER -
