Experimental Study of Concentric Tube Heat Exchanger Using Cuo–Water based Nanofluid
Rajnish Kumar,Arun Kumar
ABSTRACT: Present work describes the heat transfer characteristics of CuO-Water nanofluids as a coolant in concentric tube heat exchanger. The concentric tube heat exchanger is fabricated from copper concentric inner tube of length 1000mm. In this work, a comparison of heat transfer characteristics and effectiveness of heat exchanger between CuO-Water nanofluids and water is presented. Experiments were conducted by using water and CuO-Water nanofluids of 0.2% volume concentration. The nanofluids are the mixture of water as base fluid and CuO particles in nano range. It is observed that heat transfer rate and effectiveness for nanofluids as cooling medium are higher than water which is also used as cooling medim. Approximately 20% enhancement in heat transfer rate and 16% enhancement in effectiveness have been found for 0.2% CuO-Water nanofluids. Overall performance of the concentric tube heat exchanger can be improved by using CuO-Water nanofluids.
Keywords : Nanofluids; Coolant; Heat exchanger; Heat transfer rate; Effectiveness.