To obtain a copy of a specific publication, users should contact the publication's publisher directly.
Abstract
This paper summarizes the results of a simulation effort in support of ASHRAE SSPC 90.1 for the inclusion of reflective roofs in the proposed standard. Simulation results include the annual electricity and fuel use for two building types, residential and nonresidential. The residential model is intended to apply to hotel guest rooms, patient roofs in hospitals, and high rise residential apartments. In order to be consistent with other requirements of the draft standard, the authors used the 90.1 Envelope Subcommittee DOE-2 prototype building and operating schedules, which were supplied to them. The parametric simulations were performed for 19 climat bins, as defined in the current 90.1 while only 19 are considered in this study; a range of roof absorptivities from 0.25 to 0.95; and thre roof U-factors (corresponding to roof insulation of R3, R11 and R38). The results are condensed into climate-dependent adjustment factors to reduce roof insulation for buildings with reflective roofs such that the net energy use of the building stays constant when compred with the energy use of a dark-colored. roof.
This paper summarizes the results of a simulation effort in support of ASHRAE SSPC 90.1 for the inclusion of reflective roofs in the proposed standard. Simulation results include the annual electricity and fuel use for two building types, residential and nonresidential. The residential model is intended to apply to hotel guest rooms, patient roofs in hospitals, and high rise residential apartments. In order to be consistent with other requirements of the draft standard, the authors used the 90.1 Envelope Subcommittee DOE-2 prototype building and operating schedules, which were supplied to them. The parametric simulations were performed for 19 climat bins, as defined in the current 90.1 while only 19 are considered in this study; a range of roof absorptivities from 0.25 to 0.95; and thre roof U-factors (corresponding to roof insulation of R3, R11 and R38). The results are condensed into climate-dependent adjustment factors to reduce roof insulation for buildings with reflective roofs such that the net energy use of the building stays constant when compred with the energy use of a dark-colored. roof.
Date
0/1998
0/1998
Author(s)
H Akbari; S Konopacki; C Eley; B Wilcox; M VanGeem; D Parker
H Akbari; S Konopacki; C Eley; B Wilcox; M VanGeem; D Parker
Page(s)
Keyword(s)
reflectivity; energy; ASHRAE; cool roofs
reflectivity; energy; ASHRAE; cool roofs