Abstract
Roof ponds cooled by nocturnal long wave radiation have often been proposed as a cheap and effective means of providing thermal comfort in buildings in hot-arid locations. Many of the schemes incorporate flat-plate radiators through which the water is circulated at night to be cooled. This paper analyzes the parameters affecting the performance of such a radiator, specifically designed for nocturnal radiative cooling. A cheap, simple and flexible design for a cooling radiator was suggested as a result of the analysis, and tested at the experimental facilities of the Center for Desert Architecture at Sede-Boqer, Israel. The mean nightly cooling output of the radiator - due to the combined effect of radiation and convection - was over 90 watts/m2 under typical desert meteorological conditions. The analytical model adapted for this application allows accurate calculation of the fluid temperature at the outlet of the radiator, as a function of the properties of the radiator, the meteorological conditions and the operating parameters of the cooling system.
| Original language | English |
|---|---|
| Pages (from-to) | 700-703 |
| Number of pages | 4 |
| Journal | Renewable Energy |
| Volume | 16 |
| Issue number | 1-4 -4 pt 2 |
| DOIs | |
| State | Published - 1 Jan 1999 |
| Event | Proceedings of the 1998 World Renewable Energy Congress V. Part 2 (of 2) - Florence, Italy Duration: 20 Sep 1998 → 25 Sep 1998 |
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment