A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Energy saving through intermittent evaporative roof cooling
AbstractThe effect of intermittent spraying of a building's roof on the cooling load of the building is investigated. The thermal response of the roof with intermittent stepwise spraying variation is modeled by introducing an equivalent fictitious temperature that accounts for meteorological conditions, roof-to-sky radiation and evaporative effects during roof-wetted periods. On the basis of harmonic analysis, a transfer function relating the heat transfer rate from the interior ceiling surface to the outdoor conditions is obtained.The model results show that evaporative roof cooling could reduce the cooling load by 40% for hot dry conditions. The effects of the spraying period, the mass of sprayed water and uniform or time-dependent spraying upon the energy rates are presented and discussed.
Energy saving through intermittent evaporative roof cooling
AbstractThe effect of intermittent spraying of a building's roof on the cooling load of the building is investigated. The thermal response of the roof with intermittent stepwise spraying variation is modeled by introducing an equivalent fictitious temperature that accounts for meteorological conditions, roof-to-sky radiation and evaporative effects during roof-wetted periods. On the basis of harmonic analysis, a transfer function relating the heat transfer rate from the interior ceiling surface to the outdoor conditions is obtained.The model results show that evaporative roof cooling could reduce the cooling load by 40% for hot dry conditions. The effects of the spraying period, the mass of sprayed water and uniform or time-dependent spraying upon the energy rates are presented and discussed.
Energy saving through intermittent evaporative roof cooling
Al-Turki, A.M. (author) / Zaki, G.M. (author)
Energy and Buildings ; 17 ; 35-42
1990-05-18
8 pages
Article (Journal)
Electronic Resource
English
Evaporative Roof-Cooling Systems
| British Library Online Contents | 1999
Evaporative cooling of residential roof
| Engineering Index Backfile | 1952
4761965 Evaporative roof cooling system
Elsevier | 1990