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Method of research for solar cookers performance characteristics- analysis and comparison

Raghav Geetanjali, Sharma Pankaj Kumar, Kumar Suresh, Maithani Rajesh

Acta Innovations

2021

no. 39

54--66

Cooking is one of the most common activity in day-to-day life of every woman. In rural areas the transportation of fuel is major problem and the increasing demand of energy for cooking applications is gaining importance and various investigations are being carried out for performance enhancement of the solar cooker. The box-type solar cooker has a complex thermal analysis due to the transient heat transfer phenomenon involved in three dimensions. A comparison of the standard correlation available are analysed for accuracy of predicted results with experimental data. The investigation involves the experimental determination of the parameters viz. wind heat transfer coefficient, side and bottom loss coefficient, inner and outer glass temperature. The extensive data is analysed with that of standard correlations and the significance of the experimental data is checked. Analysis found to have deviation of 3%-20% in experimental and correlation data, which indicates that for accuracy of performance analysis the studied parameters should be determined experimentally.

On the thermal boundary layer of a moving flat plate thermometer in the presence of Ohmic heating

Singh A. K., Chandran P., Sacheti N. C.

Applied Mechanics and Engineering

2000

Vol. 5, no 2

303-313

The energy aspect of the boundary layer flow due to Ohmic heating and frictional forces at a moving flat plate has been analyzed based on similarity transformations. The flow is assumed to take place in the presence of an externally applied transverse magnetic field. The velocity and temperature profiles in the boundary layer have been shown by numerically integrating the governing nonlinear ordinary differential equations. Furthermore, the variations of temperature, both close to and away from the boundary plate, have been illustrated graphically as a function of the Prandtl number. The effects of the dissipative processes on the skin friction and plate temperature have been discussed. The magnetic field increases both the skin friction and the wall temperature, whereas, for a fixed magnetic field, the effect of boundary motion is to decrease them.