A transient analysis has been carried out on a hybrid solar water heater which comprises a rock bed air heater with optimum design parameters in conjunction with an air-to-water transverse fin shell-and-tube heat exchanger (mixed air and unmixed water type) in which cold water from the storage...

In this manuscript, potential of daylighting in reducing electrical lighting load, has been explored. The analysis has been carried out for four different types of windows and for three different climatic conditions of India. Two Perez models have been used to estimate illuminance on horizontal...

In this study, energy rating of different window glazings, available in the Indian market, has been carried out. This rating is helpful in selecting the best window for a given building and a given climate. It is shown that savings by a window w.r.t. the base window (single glazed, clear glass,...

In the present work, a thermo-hydraulic performance evaluation of the collector arrays (collector modules or subcollectors arranged in series, parallel or combined series and parallel mode) has been carried out using a mathematical model. Based on the performance evaluation criterion of an equal...

In this paper, an artificial neural network (ANN) model is developed for estimating beam solar radiation. Introducing a newly defined parameter, known as reference clearness index (RCI), computation of monthly mean daily beam solar radiation at normal incidence has been carried out. This RCI is...

In this paper, artificial neural network (ANN) models are developed for estimating monthly mean hourly and daily diffuse solar radiation. Solar radiation data from 10 Indian stations, having different climatic conditions, all over India have been used for training and testing the ANN model. The...

In this article, we use the concept of artificial neural network and goal oriented design to propose a computer design tool that can help the designer to evaluate any aspect of earth-to-air heat exchanger and behavior of the final configuration. The present study focuses mostly on those aspects...

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...

A linear Fresnel reflector-concentrator employing commercial flat, front-reflecting mirror strips (of reflectivity [varrho] = 0·6), arranged in a planar configuration, has been fabricated and analyzed. An average concentration ratio of about 18 has been obtained for two-thirds of the...

Highly stable selective coatings of cobalt oxide have been prepared on commercial aluminium and galvanised iron substrates by the method of spray pyrolysis. The optothermal, structural and optical properties of these films have been investigated to determine the optimum growth parameters. Best...