This paper focused on the experimental study of the performance characteristics of diminutive wire mesh as an extended heat transfer surface in tube-in-tube compact heat exchangers. Experiments are conducted in the compact heat exchangers with R-134a and mixture of hydro carbons. The effectiveness of the heat exchangers was calculated using the experiment data and it was found that the effectiveness of heat exchanger-1 is above 75%, heat exchanger-2 is above 80% and heat exchanger-3 is above 84% for R-134a.The effectiveness of heat exchanger-1 is about 60%, heat exchanger-2 is about 79% and heat exchanger-3 is about 81% for mixture of hydro carbons. In this paper, details about the new tube-in-tube type compact heat exchanger, experimental setup, results and conclusions are discussed.

Key words:Wire Mesh, Extended Heat Transfer Surface, Compact Heat Exchanger, Effectiveness, Pinch Point.