Experimental investigation on natural convection in horizontal channels with the upper wall at uniform heat flux

2007 ◽  
Vol 50 (5-6) ◽  
pp. 1075-1086 ◽  
Author(s):  
O. Manca ◽  
S. Nardini
Keyword(s):  
Heat Flux ◽  
Experimental Investigation ◽  
Natural Convection ◽  
Uniform Heat Flux ◽  
Uniform Heat

Experimental Investigation of an Electro-Adsorption Chiller

2005 ◽  
Author(s):  
Kim Choon Ng ◽  
Xiaolin Wang ◽  
Lizhen Gao ◽  
Anutosh Chakarborty ◽  
Maung Aye Sai
Keyword(s):  
Heat Flux ◽  
Experimental Investigation ◽  
Surface Temperature ◽  
Cooling Capacity ◽  
Coefficient Of Performance ◽  
Uniform Heat Flux ◽  
Adsorption Chiller ◽  
Uniform Heat ◽  
Heating Load ◽  
Load Surface

A comprehensive experiment has been conducted on a novel electro-adsorption chiller (EAC) with a rated cooling capacity of 120 W (uniform heat flux of about 4.7 W/cm2). At these rated conditions, it produces a heating load surface temperature of 23°C, about 10 degree below that of the heating-load temperature. The coefficient of performance (COP) of the prototype EAC is measured to be about 0.84.

Natural Convection in a Partitioned Vertical Enclosure Heated With a Uniform Heat Flux

2006 ◽  
Vol 129 (6) ◽  
pp. 717-726 ◽  
Author(s):  
Kamil Kahveci
Keyword(s):  
Heat Flux ◽  
Nusselt Number ◽  
Natural Convection ◽  
Thermal Resistance ◽  
Average Nusselt Number ◽  
Numerical Study ◽  
Finite Thickness ◽  
Vertical Wall ◽  
Uniform Heat Flux ◽  
Uniform Heat

This numerical study looks at laminar natural convection in an enclosure divided by a partition with a finite thickness and conductivity. The enclosure is assumed to be heated using a uniform heat flux on a vertical wall, and cooled to a constant temperature on the opposite wall. The governing equations in the vorticity-stream function formulation are solved by employing a polynomial-based differential quadrature method. The results show that the presence of a vertical partition has a considerable effect on the circulation intensity, and therefore, the heat transfer characteristics across the enclosure. The average Nusselt number decreases with an increase of the distance between the hot wall and the partition. With a decrease in the thermal resistance of the partition, the average Nusselt number shows an increasing trend and a peak point is detected. If the thermal resistance of the partition further declines, the average Nusselt number begins to decrease asymptotically to a constant value. The partition thickness has little effect on the average Nusselt number.

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