An earlier expression for the heat transfer coefficient between the heated surface and the flowing fluid used in the investigation of the performance of a few collector/storage systems leads to results which are physically impractical. In this communication we derive the correct expression for...

A periodic analysis of the novel [`]transwall' for passive heating is described and the thermal flux entering an air-conditioned space through the [`]transwall' is evaluated. Numerical calculations have been performed corresponding to the meteorological data of the 11th of January at Boulder,...

Based on the periodic solution of the heat conduction equation, an analysis has been developed to study the thermal performance of a simple domestic solar water-heating system consisting of a thermal-trap solar-energy collector, connected to a water tank. To study the effects of typical...

Sensitivity analysis is a technique that evaluates the model response to changes in input assumptions. Due to uncertain prices of primary fuels in the world market, Government regulations for sustainability and various other technical parameters there is a need to analyze the techno-economic...

Experimental and theoretical investigations to optimise the geometrical design parameters of a tubular collector under atmospheric and evacuated (~ 10-3 torr) conditions are reported. The results indicate that a maximum stagnation temperature, which corresponds to the minimum heat loss, is...

This paper compares the thermal performances of single hollow (SHS) and double hollow concrete slabs (DHS) from three points of view: (i) the overall reduction in heat flux, (ii) load levelling and (iii) the phase difference. It is seen that, for the same total thickness of concrete (i) a DHS...

The photogalvanic effect of photosensitizer - reductant pair, Toluidine Blue-Arabinose and Malachite Green-Arabinose have been studied in presence of anionic surfactant NaLS (sodium lauryl sulphate) and a tentative mechanism has been proposed for the cell reaction. The photopotential ([Delta]V)...