EXPERIMENTAL STUDY OF HEAT TRANSFER ENHANCEMENT IN HEAT EXCHANGER USING POROUS MEDIA

Abstract

In present work experimental investigation of heat transfer enhancement in double pipe counter flow heat exchanger with insert metallic pad inner tube. Experimental work included the design of a tube in tube heat exchanger with the dimensions of (length 1.11m, 0.063m outer tube diameter and 0.031m inner tube diameter) Plain and saturated with pad heat exchanger . The examination were tested to evaluate their influence on effectiveness of heat exchanger, heat transfer coefficient, number transfer unit and pressure drop at steady-state condition. Water was used as a working fluid in the double pipe heat exchanger where hot water flow in inner tube and cold water flow in outer tube. The study was conducted at the hot water mass flow rates between (0.066- 0.198 kg/s) and (0.1997 kg/s) cold water mass flow rate. The inlet temperatures of hot and cold water were (43 ᵒC) and (18 ᵒC) respectively. The results are obtained for range of Reynolds number to hot water (4862.9< Re<14633.8) and constant for cold water (Re=2912.2).