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R. Thundil Karupparaj

Bio: R. Thundil Karupparaj is an academic researcher from VIT University. The author has contributed to research in topics: Pressure drop & Diesel fuel. The author has an hindex of 2, co-authored 2 publications receiving 134 citations.

Papers
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Journal ArticleDOI
TL;DR: In this article, the effect of bio-diesel on a diesel engine when compared to diesel and evolves conclusions with respect to performance and emissions are evaluated, even though the performance reduces slightly when the engine is fueled with biodiesel, significant changes in the combustion parameters observed in case of biodiesel blends are significant to note.

112 citations

Journal ArticleDOI
TL;DR: In this article, convective heat transfer analysis for a horizontal circular pipe with fluid in mixed laminar flow range is performed using experimental simulation under constant heat flux boundary condition, and the variation of heat transfer coefficient and pressure drop in the pipe flow for water and water based Al2O3 nanofluids at different volume concentrations and twisted tapes are studied.

55 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors present empirical and numerical analyses of thermal performance development in flat plate solar collectors (FPSCs) and provide a complete overview of the up-to-date developments, methods, critical economic factors, the significance of solar water heating, and the challenges faced by the implementations of such solar energy heating systems.

262 citations

Journal ArticleDOI
TL;DR: In this article, a review of the literature on the area of heat transfer improvement employing a combination of nanofluid and inserts is performed, and the progress made and current challenges for each combined system are discussed, and some conclusions and suggestions are made for future research.
Abstract: Improving heat transfer is a critical subject for energy conservation systems which directly affects economic efficiency of these systems. There are active and passive methods which can be employed to enhance the rate of heat transfer without reducing the general efficiency of the energy conservation systems. Among these methods, passive techniques are more cost-effective and reliable in comparison with active ones as they have no moving parts. To achieve further improvements in heat transfer performances, some researchers combined passive techniques. This article performs a review of the literature on the area of heat transfer improvement employing a combination of nanofluid and inserts. Inserts are baffles, twisted tape, vortex generators, and wire coil inserts. The progress made and the current challenges for each combined system are discussed, and some conclusions and suggestions are made for future research.

191 citations

Journal ArticleDOI
TL;DR: In this paper, the authors developed a thermodynamic model framework to analyse the performance of a parabolic trough collector with a twisted tape insert, and they found the set of conditions under which a twisted-tape insert is useful to boost the performance.

164 citations

Journal ArticleDOI
TL;DR: In this article, the performance, combustion and emission characteristics of a single cylinder direct injection (DI) diesel engine with three fuel series: B20, B20A30C30 and B100A30 C30 were investigated.

144 citations

Journal ArticleDOI
TL;DR: In this paper, a comparative study to find out the effects of additive for biodiesel fuel and efforts to recover the combustion and performance and to diminish the emissions is performed. But, the results show that the use of additive to the 2nd generation of biodiesel are the best in improving the combustion performance and emission reduction.
Abstract: Growing demand of fuel in daily life and its risk cause serious problem for this globe. Serious attention is required to see this problem. In this review article there is a comparative study to find out the effects of additives for biodiesel fuel and efforts to recover the combustion and performance and to diminish the emissions. By using biodiesel, there are most disadvantages such as higher density, lesser heating value, high fuel consumption and high oxides of nitrogen. To avoid above disadvantages, the fuel additives help in playing a very important role in minimizing the drawbacks of biodiesel and in maintaining international fuel standards. Additives can be considered toward to improve combustion, fuel economy and to decrease the emissions. Many different types of additives are applied in biodiesel to meet the specification standards and to recover the quality of biodiesel. The metal based additives, cetane number additives, antioxidant additives and oxygenated additives help in improving the quality of the biodiesel. From this literature review, the effects of additive on biodiesel are explained. The reviews conclude that the uses of additive to the 2nd generation of biodiesel are the best in improving the combustion performance and emission reduction.

135 citations