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Panchal H.,Gujarat Power Engineering & Research Institute | Patel P.,Smt S R Patel Engineering College
International Journal of Ambient Energy | Year: 2014

Solar energy is an abundant and secure source of vitality and thus is described as one of the most promising alternative energy options. Nevertheless, solar energy is intermittent in nature as there is no sun at night. Its total availability value is seasonal and is hooked on the meteorological conditions of locations. Hence, solar energy presents an unsteady energy resource. So, thermal energy storage will be necessary to save the available solar energy at a period of no load or when excessive solar energy is available, and to make up for the shortage of energy when the load is in need of energy. This article reviews the different energy storage materials tried by various researchers to improve the distillate output of solar stills. © 2014 Taylor & Francis Source


Panchal H.N.,Gujarat Power Engineering & Research Institute
International Journal of Ambient Energy | Year: 2016

In this present paper, the study focuses on the development of a double-effect solar still with evacuated tubes for water desalination considered for small-scale applications at remote locations where only saline water or brackish water is available. In this present paper, the potable water cost per litre has been evaluated. The payback periods for different conditions of the distribution of distilled water, namely at the cost it is produced and at the selling price on market rate, have been evaluated. The cost of water per litre was a minimum of Rs. 0.19 with the average distillate output being about 20 l/day, when the interest rate and the lifetime of the solar still are taken as 4% and 50 years, respectively. The lowest payback time of 45 days was obtained when the selling price of water was Rs. 20 per litre. © 2016 Taylor & Francis Source


Panchal H.,Gujarat Power Engineering & Research Institute
International Journal of Ambient Energy | Year: 2016

Exhaust gas temperature of diesel engine is higher compared with a petrol engine and also creates higher pollution in the environment. Exhaust gas recirculation system and many other systems have used for reuse of exhaust gas to improve the performance of diesel engine, but the use of diesel engine for production of potable water production is still unattended by the researchers. The main aim of this research work is to use the waste heat of exhaust gas for potable water production from the low-capacity desalination system integrated with a evaporator and condenser unit. In this work, single pass evaporator and water-cooled condenser used for evaporation and condensation of saline water were designed and fabricated by locally available materials. The experiments were performed on a 10 HP diesel engine with varying the load to get potable water. It has found that 4.2 L/hr of potable water is obtained from the exhaust gas without varying the performance of the engine. Also, it has found that, temperature of saline water is heated more than 70°C in the condenser unit. © 2016 Taylor & Francis Source


Panchal H.,Gujarat Power Engineering & Research Institute | Thakkar H.,Government Polytechnic
International Journal of Ambient Energy | Year: 2015

Solar still is one of the most promising technology to convert available brackish or saline water into drinkable water. It is not widely used due to the lower distillate output from it. Passive and active are the two main types of solar still. Distillate output of a passive solar still is lower compared with that of an active solar still. Hence, for increment in distillate output from the solar still, active solar still is the only viable option. The present review shows the various techniques available in an active solar still for increment in distillate output. © 2015 Taylor & Francis Source


Panchal H.,Gujarat Power Engineering & Research Institute | Patel P.,Smt Sr Patel Engineering College | Patel N.,Smt Sr Patel Engineering College | Thakkar H.,Government Polytechnic
International Journal of Ambient Energy | Year: 2015

Solar still is a simple device which can convert available waste or brackish water into potable fresh water by utilising solar energy. In the present research work, an attempt has been made to store excess heat energy in solar stills during the daytime for the continuation of the process at late evening and night hours for increment distillate output. To investigate the effect of energy storage materials on the productivity under the same climatic conditions, three same-size single-basin single-slope solar stills with an area of 1 m2 made of fibre reinforced plastic (FRP) sheet were tested with 0.04 m layer of water level to investigate effects on solar still. Different energy storage materials like marble pieces and sandstones were used for easy availability and lower price. It has been found that sand stones are more productive compared with marble pieces and without materials inside solar still. © 2015 Taylor & Francis Source

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