Experimental analysis of copper coated helical coiled tube heat exchanger using nanofluid and water

Abstract

Many studies focused on improving heat transfer by increasing the electrical, industrial, and transportation processes that are required to achieve a higher heat transfer rate. In general, there are two types of heat transfer enhancement techniques: active and passive. External power inputs such as pulse flow, vibratory force, and a magnetic field are used in the active approach. The heat transfer rate is increased upto 20 % in the passive technique by adding more devices or changing the heat transfer surface. The nanoparticle suspension is a heat transfer improvement approach in this study. An experimental investigation used Al2O3-water nanofluid in the counter flow heat exchanger to improve heat transfer in the range of 20 %. Experiments with varied volume concentrations 0.1 and 0.15 and mass flow rates of nanofluid were carried out. The arrangements are utilized to assess the situation. The temperature fluctuations were measured using the setups and the acquired values are compared to prior nanofluid performance results, and the result demonstrates that the heat transfer rate has risen upto 20 %. It also shows that the Al2O3-water nanofluid performed better than water.