Abstract
Abstract Concentric tube heat exchanger is a low cost, which increases reliability by restricting mixing of fluids exchanging heat. Concentric tube heat exchanger has potential application such as heat recovery from engine cooling circuit, oil cooling, desuperheating in refrigeration and air conditioning, dairy, and chemical industry, pharmaceutical industry, refinery, etc. This paper concentrate on an experimental study on concentric tube heat exchanger for water to nanofluids heat transfer with various concentrations of nanoparticles in to base fluids and application of nanofluids as working fluid. The experimental results on this type of heat exchanger configuration and water nanofluids could not be located in literature. Overall heat transfer coefficient was experimentally determined for a fixed heat transfer surface area with different volume fraction of nanoparticles in to base fluids and results were compared with pure water. It observed that, 3% nanofluids shown optimum performance with overall heat transfer coefficient 16% higher than water.
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