Abstract: “In the present study Nu correlation of tube side for triangular pitch plain tubes bundle is proposed. The performance of the current heat exchanger is investigated experimentally in a single phase. Ten different experiments were conducted for different flow rates in order to study the effect of different parameters on heat transfer coefficient correlation. Hot inlet temperature was kept at 25°C whereas, cold inlet temperature was kept at 15°C. Reynolds number was varied from 2300-20,000. Matlab code for modified Wilson plot method was also developed to overcome the assumption of Reynolds exponent in Wilson plot method. All the required parameters like temperature, flow rate and pressure were calculated using calibrated instruments. The tube-side Nu correlation was proposed and compared with existing correlations. The maximum difference came out to be 3.8% and 5.7% with Seider and Tate and Dittus-Boelter correlations respectively whereas, difference with Gnielinski correlation in turbul”

Keywords: Plain tubes bundle, Wilson plot method, Nu correlation, Modified Wilson plot method.