Experimental validation of thermal model of open roof pond

Passive cooling by evapo-reflective roof for hot dry climates

“…The relative advantages of evaporative cooling in relation to many other approaches (cavity wall, insulation, whitewash and large exposure orientations, vegetable pergola shading, roof with removable canvas, water film, soil humid grass and roof with white pots as cover) were demonstrated in [10,11]. The reduction of heat gain through the roofs using evaporative cooling systems was extensively investigated with open roof ponds [18,19], on water spraying over the roof, moving water layer over the roof, thin water film and roofs with wetted gunny bags [12][13][14][15][16][17]. Chandra and Chandra [12] have developed a periodic heat transfer model to study the effects of evaporative cooling using water spray and variable ventilation on the temperature control of a non-air-conditioned building.…”

Design and Modelling of Water Chilling Production System by the Combined Effects of Evaporation and Night Sky Radiation

“…The analysis of the simulation results, built on a simulation time step of 10 seconds, indicates that the system recorded higher net sky radiation value in Sydney than that in Alice Spring (Figure 8). This is strongly related to the absence of the high evaporation rate of water where the water temperature has dropped to a lower value and reduced the temperature difference between the water and the sky temperature (used in (7) and (22)).…”

“…Calculations of heat and energy transfers between the system and the boundary can be derivatives using the basic heat transfer equation; many works presenting the mathematical modelling of the panel pond system can also be referenced [17][18][19][20][21][22]. The amount of heat dissipated to the sky by radiation is a function of the pond emissivity, the sky temperature, and the pond water temperature; other factors having an effect are the humidity ratio, clouds, and radiation wavelength which have a direct effect on changes to the emissivity and sky temperature values.…”

Solar House

“…In addition to the vegetation, there are some other concepts that are used such as colouring of the roof [8,9] evaporative cooling, and solar ponds [10,11]. There are also some selective coatings on the roof of the building that reflect radiation and cool the roof.…”