Roof ponds combined with a water-to-air heat exchanger as a passive cooling system: Experimental comparison of two system variants

Almodovar, José Manuel; La Roche, Pablo

doi:10.1016/j.renene.2019.03.148

Title: Roof ponds combined with a water-to-air heat exchanger as a passive cooling system: Experimental comparison of two system variants

Journal Article · Tue Oct 01 00:00:00 EDT 2019 · Renewable Energy

DOI:https://doi.org/10.1016/j.renene.2019.03.148· OSTI ID:1559254

^[1]; La Roche, Pablo ^[2]

Univ. of Seville (Spain). School of Architecture
California Polytechnic Pomona Univ. (CalPoly), CA (United States). Dept. of Architecture

Two roof pond configurations combined with a water-to-air heat exchanger (WAHE) are evaluated. Test cells of 1.35 m × 1.35 m x 1.35 m with the same thermal properties, except for the roofs, are built in a hot-dry climate with mild winters. They are connected with a WAHE placed inside the roof pond's water by a pipe through which the indoor air is re-circulated. The first roof consists of a 0.35 m deep water pond covered with a floating polystyrene insulation 0.03 m thick, and a spray system located 0.5 m above it that operates at night. The second roof is covered with an aluminum plate separated by a 0.10 m air gap above a 0.25 m deep water pond. We ran multiple series and compared the results to a control cell that had a California energy code compliant insulated roof. Predictive equations are developed to dimension the WAHE system. Results demonstrate that the cells with roof ponds have better cooling performance than the code compliant control cell. The best performance is obtained in the cell with the WAHE operating continuously. In this case, the indoor temperature stayed below 24 °C even with ambient temperatures above 35 °C.

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Research Organization:: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1559254

Journal Information:: Renewable Energy, Vol. 141, Issue C; ISSN 0960-1481

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 8 works

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References (15)

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Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
roof pond
water-to-air heat exchanger
passive cooling
evaporative cooling
thermal energy storage
physical testing – mockups.

Data for: Roof ponds combined with a water-to-air heat exchanger as a passive cooling system: Experimental comparison of two system variants Almodóvar, José https://doi.org/10.17632/zt3jb3p6bm.1 The current record is supplemented by this dataset	dataset	January 2019
Data for: Roof ponds combined with a water-to-air heat exchanger as a passive cooling system: Experimental comparison of two system variants Almodóvar, José https://doi.org/10.17632/zt3jb3p6bm The current record is supplemented by this dataset	dataset	January 2019

Title: Roof ponds combined with a water-to-air heat exchanger as a passive cooling system: Experimental comparison of two system variants

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References (15)

Linked Research (2)

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