A Review Study on Heat Transfer Performance Enhancement in a Circular Tube Using Wire Coils and Rings
Suthin Pholboorn *
Department of Mechanical Technology, Faculty of Technology, Udon Thani Rajabhat University

Abstract

Heat transfer performance enhancement in heat exchanger by using wire coils and rings was used in many industries such as power plant, air condition and refrigeration systems, food industries, automotive industries or chemical reactors. Although wire coils and rings increased the convection heat transfer coefficient for enhancing the heat transfer, pressure loss was increased. This paper collected literatures which used wire coils and rings in many shapes provided by Nusselt number, friction factor and heat transfer performance. From the collection, it is found that the conical cut – out turbulators with internal fins shows the maximum heat transfer performance of 2.4 with Reynolds number of 6,800.

Keywords : Heat exchanger, Wire coils and rings, Heat transfer performance, Pressure loss