TY - JOUR
T1 - Conceptual design of a downward-convecting solar pond filled with a water-saturated, porous medium
AU - Hadim, A.
AU - Burmeister, L. C.
PY - 1992/11
Y1 - 1992/11
N2 - Previous results from a stability analysis of natural convection in a water-saturated porous medium with externally imposed downward flow of the fluid and distributed internal heat generation are used in this study for a preliminary design of a saltless solar pond. The pond is filled with a water-saturated porous medium to inhibit natural convection. Downward flow of water is steadily imposed to allow the absorbed solar radiation, dependent upon the extinction coefficient of the watersaturated porous medium, to be carried down to the bottom of the solar pond from whence warm water is conveyed to the point of use. The downward velocities used have small magnitudes to alio w useful bottom temperatures to be obtained. A steadystate analytical study was performed to determine the maximum temperature that can be obtained at the bottom of the saltless solar pond which resulted in a relationship involving the internal and external Rayleigh numbers, extinction coefficient, and Peclet number of the imposed downward flow. Results from this analytical study are combined with results from the stability analysis in a design procedure. This procedure is used to design a saltless solar pond of the concept described above for several cases.
AB - Previous results from a stability analysis of natural convection in a water-saturated porous medium with externally imposed downward flow of the fluid and distributed internal heat generation are used in this study for a preliminary design of a saltless solar pond. The pond is filled with a water-saturated porous medium to inhibit natural convection. Downward flow of water is steadily imposed to allow the absorbed solar radiation, dependent upon the extinction coefficient of the watersaturated porous medium, to be carried down to the bottom of the solar pond from whence warm water is conveyed to the point of use. The downward velocities used have small magnitudes to alio w useful bottom temperatures to be obtained. A steadystate analytical study was performed to determine the maximum temperature that can be obtained at the bottom of the saltless solar pond which resulted in a relationship involving the internal and external Rayleigh numbers, extinction coefficient, and Peclet number of the imposed downward flow. Results from this analytical study are combined with results from the stability analysis in a design procedure. This procedure is used to design a saltless solar pond of the concept described above for several cases.
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U2 - 10.1115/1.2930012
DO - 10.1115/1.2930012
M3 - Article
AN - SCOPUS:85012244774
SN - 0199-6231
VL - 114
SP - 240
EP - 245
JO - Journal of Solar Energy Engineering, Transactions of the ASME
JF - Journal of Solar Energy Engineering, Transactions of the ASME
IS - 4
ER -