Review: Technological Development of Heat Transfer Enhancement in Two Phase Flow by using Passive Method

Abstract

The Heating, Ventilation, Air conditioning & Refrigeration application always shows an opportunity to enhance the heat transfer rate. With these motives, researchers explored the use of passive methods in single phase flow which exhibits promising results of heat transfer enhancement. On the other hand, researchers investigated the effect of the passive method in Two phase flow, which also shows promising results in heat transfer enhancement. Two phase flow includes Boiling, Evaporation & condensation phenomenon. This paper focused on the review of the experimental studies conducted on the use of heat transfer enhancement in the condensation process mostly. Out of this passive method, Micro fin tube shows better heat transfer enhancement and less pressure drop compared to other methods. It has been observed that the use of porous media also showing promising effects in heat transfer enhancement and it's fetching the attention of researchers. Therefore, this review work also reviewed the numerical studies on the use of porous media in two phase flow. It is needed to explore the different structure and optimum design of porous media, which have high heat transfer enhancement with low pressure drop penalty. Also, the use of low Global Warming Potential refrigerant effects needs to be explored, which could be a better alternative for existing refrigerants.