drying of agricultural products is a sophisticated process with high energy consumption. energy needed for sustainable development, is one of the biggest challenges facing humanity. the performance of a heat recovery assisted solar dryer was evaluated in this study. drying time, collector efficiency, energy consumption, solar fraction and energy recovery fraction were investigated at different ...

Simulated performance of packed bed solar energy storage system is reported in the present paper in continuation with Part-I and Part-II of this paper. The present part of the paper deals with system performance w.r.t. energy consumption by fan to propel air through the bed and thermal efficiency of solar collector. It is observed that energy consumption by fan and thermal efficiency of the col...

An evacuated tube solar collector using therminol D-12 as heat transfer fluid coupled with parabolic trough is studied in this paper. An experimental set-up was constructed to study the performance of evacuated tube collector with therminol D-12 as heat transfer fluid. The parabolic trough is coupled with evacuated tube collector for better performance. In the traditional solar collectors water...

This study compares environmental and economic impacts of using nanofluids to enhance solar collector efficiency as compared to conventional solar collectors for domestic hotwater systems. Results show that for the current cost of nanoparticles the nanofluid based solar collector has a slightly longer payback period but at the end of its useful life has the same economic savings as a convention...

The performance of the Combined Heat and Power Solar (CHAPS) collectors at the Australian National University is described. Results from testing of the collector under steady state conditions at a range of input temperatures are presented. Measured results under typical operating conditions show thermal efficiency around 57% and electrical efficiency around 11%, and therefore a combined efficie...

As the fossil fuels are depleting continuously, we know that solar energy harvesting is a significant potential area for new research dimensions. Sun provides us about 1.9 x 10 8 TWh/yr on the land, of which 1.3 x 10 5 TWh]/yr energy is used. In order to make much use of solar energy on the earth, solar energy harvesting into more usable form (e.g. heat or electricity) by using solar energy col...

Heat transfer phenomena of flat plate solar collector filled with different nanofluids has been investigated numerically. Galerkin’s Finite Element Method is used to solve the problem. Heat transfer rate, average bulk temperature, average sub-domain velocity, outlet temperature, thermal efficiency, mean entropy generation and Bejan number has been investigated by varying the solid nanoparticle ...

A new method of optimization on linear parabolic solar collectors using exergy analysis is presented. A comprehensive mathematical modeling of thermal and optical performance is simulated and geometrical and thermodynamic parameters were assumed as optimization variables. By applying a derived expression for exergy efficiency, exergy losses were generated and the optimum design and operating co...

Reference counting is a classical garbage collection method. Recently, a series of papers have extended the basic method to drastically reduce its notorious overhead and extend the basic method to run concurrently and efficiently on a modern computing platform. In this paper we investigate the use of prefetching to further improve the efficiency of the reference-counting collector. We propose p...

to increase agricultural crops’ quality and to minimize losses in the final product and used energy during the drying process, major drying system parameters should be continuously controlled. precise control of such parameters is attained by using automatic control systems. to optimize the overall dryer efficiency in a forced convective solar dryer, a controller was designed, constructed a...