Roof sprinkling system sweats down A/C costs
This article describes a roof spray system which enhances the energy efficiency of a building's HVAC system at a nominal cost in relationship to the benefits it yields. Roof spray cooling is based on the fact that water, when it evaporates, absorbs large amounts of heat. The evaporation of one gallon of water will dissipate about 8500 BTU's of heat; and three fallons of water evaporated over one hour's time offers the same cooling capacity as a two-ton airconditioner operated over the same period. By intermittently spraying its surface with water, a direct evaporative cooling system allows a roof to sweat away the sun's radiant heat, cooling an un-airconditioned building from 10 to 12 degrees mrt and reducing summer electric costs by 25%.
- OSTI ID:
- 6306662
- Journal Information:
- Energy Manage. Tech.; (United States), Vol. 8:4
- Country of Publication:
- United States
- Language:
- English
Similar Records
An office building used as a federal test bed for energy-efficient roofs
Comparison of software models for energy savings from cool roofs