Measurement of the Vertical Distribution of Reflected Solar Radiation*
DOI:
https://doi.org/10.5614/j.eng.technol.sci.2015.47.2.5Abstract
The purpose of this study was to develop a devicefor measuring the vertical distribution of the reflected radiation to the inside of a room from terrace to building.The proposed device is attached to aluminum plates that are painted matte black at intervals of 20 cm on polystyrene insulation. The surface temperature of the aluminum plate, called the SAT (sol-air temperature), is used as an indicator of the quantity of solar radiation. In order to compare terrace materials, two of the measuring devices were located facing south.Concrete tile, artificial turf, and wood chips were selected as materials to be comparedfor the surface of the terrace and were laid in front of the measuring devices. The results indicate that the SAT reflected onto a vertical plane was higher closer to the ground for all materials. Hourly fluctuations of the vertical distribution of the reflected solar radiation differed, depending on the terrace surface material. When concrete tiles of different thicknesses were compared, the temporal heating patterns varied due to differences in heat capacity. These results lead us to the conclusion that using the developed measuringdevice enables grasping the effect of vertical distribution of reflected solar radiation from a terrace.Downloads
References
Akbari, H., Kurn, D., Bretz, S. & Hanford, J., Peak Power and Cooling Energy Savings of Shade Trees, Energy and Buildings, 25, pp. 139-148, 1997.
Tan, C.L., Wong, N.H. & Jusuf, S.K., Effects of Vertical Greenery on Mean Radiant Temperature in The Tropical Urban Environment, Landscape and Urban Planning, 127, pp. 52-64, 2014.
Parker, D.S. & Barkaszi, S.F.Jr., Roof Solar Reflectance and Cooling Energy Use: Field Research Results from Florida, Energy and Buildings, 25, pp. 105-115, 1997.
Suehrcke, H., Peterson, E.L. & Selby, N., Effect of Roof Solar Reflectance on The Building Heat Gain In A Hot Climate, Energy and Buildings, 40, pp. 2224-2235, 2008.
Shi, Z. & Zhang, X., Analyzing The Effect of The Longwave Emissivity and Solar Reflectance of Building Envelopes on Energy-Saving in Buildings in Various Climates, Solar Energy, 85, pp. 28-37, 2011.
Santamouris, M., Asimakopoulos, D.N., Asimakopoulos, V.D., Chrisomalidau, N., Klitsikas, N., Mangold, D., Michel, P. & Tsangrasoullis, A., Energy and Climate in the Urban Built Environment, Earthscan, pp. 110-136, 2001.
de la Flor, F.J.S., Cebolla, R.O., Felix, J.L.M. & Domnguez, S.A., Solar Radiation Calculation Methodology for Building Exterior Surfaces, Solar Energy, 79, pp. 513-522, 2005.
O'Callaghan, P.W. & Probert, S.D., Sol-air Temperature, Applied Energy, 3(4), pp. 307-311, 1977.
National Astronomical Observatory of Japan, Ephemeris Computation Office Public Relations Center, http://eco.mtk.nao.ac.jp/koyomi/ (1 October 2013)
Ito, N., Kimura, K. & Oka, J., Field Experiment Study on The Convective Heat Transfer Coefficient on Exterior Surface of A Building, ASHRAE Trans, 78, pp. 184-191, 1972.
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