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Spray Optimization to Enhance the Cooling Performance of Transparent Roofs in Hot-humid Areas by Junsong Wang; Qinglin Meng; Chang Yang; Peng Ren; Mat Santamouris is a Engineering article available to read on EtoBox.

What is Spray Optimization to Enhance the Cooling Performance of Transparent Roofs in Hot-humid Areas about?

Spray cooling was regarded as an effective technique for outdoor cooling but its application to transparent roofs is still limited, owing to the absence of an explicit system design. In this study, the influence of three spray nozzle types with six modes on the spray cooling performance of glass curtain samples that belong to one transparent roof was first determined by a test device. Thereafter, the spray system, designed based on the selected nozzles, was assembled on the transparent roof inside a laboratory building. The thermal property moderation of the roof and indoor environment and the corresponding cost effectiveness generated by this system were further assessed. The results revealed that the spray system could effectively cool glass curtains. Compared to water-spray, mist-spray can achieve a better cooling and shading effect by shaping more dispersed and smaller droplets that effectively enlarge the contact areas with the targeted surface. The exterior glass surface temperature generated by the mist-spray was 8.0 °C lower than the surrounding air temperature, and the solar transmittance ratio decreases up to 14% compared to dry conditions. Field experiments further revea

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Author

Junsong Wang; Qinglin Meng; Chang Yang; Peng Ren; Mat Santamouris

Publisher

Elsevier BV

Published

2023

Language

EN

Field

Engineering (Physical Sciences)