An Experimental and Analytical Study of a Radiative Cooling System with Flat Plate Collectors. (2015)

• Record Type: Journal Article
• Authors: Xu, Xiaolong; Niu, Runping; Feng, Guohui
• Is Part Of: Procedia engineering. Volume 121(2015)
• Page Start: 1574
• Page End: 1581
• Publication Date: 2015
• Subjects: Nocturnal cooling -- Flat-plate collector -- Radiative cooling ;; Engineering -- Congresses; Engineering -- Periodicals; Engineering; Conference proceedings; Periodicals; 620.005
• DOI: 10.1016/j.proeng.2015.09.180
• Languages: English
• ISSNs: 1877-7058

Abstract

Abstract: A nocturnal radiative cooling system with flat plate solar collectors in Beijing, is assessed both experimentally and numerically. A cooling loop, including a radiator, a storage tank, pump, radiant floor and connecting pipes has been studied experimentally. The heat loss of an uncovered night-sky radiator was analysed according to radiation and convection theory. The water is circulated through the flat-plate radiator having 2 m 2 of collector area at night to be cooled by convection and radiation to sky. The results indicate that the minimum temperature of the floor surface is 19.5 °C. Vertical temperature field is uniform. Design temperature can increase 1 °C compared with conventional heat convection. The average net cooling reached 26 W/m 2, as condensation does not occur. It is possible to increase the total cooling capacity while maintaining a low pressure drop. It demonstrates the feasibility of cooling using fluid medium through nocturnal radiation.