Application based review on enhancement of heat transfer in heat exchangers tubes using inserts

Abstract

Abstract This paper presents the different methods of enhancing heat transfer rate in heat exchangers based on performance and applications. The study presents possible techniques for enhancing heat transfer rate in lieu of some pressure loss. It helps to understand some thermodynamic features of compact heat exchangers presented by numerical and experimental investigation for efficient designing. Effect of fin spacing, fin and tube pattern, its arrangements, waffle design, use of inserts, use of nano-fluids can improve thermal performance factor substantially. Pressure drop reduction for various cases is also a critical factor. Different applications like a solar water heater, pressurized circulating fluidised bed, parabolic trough collectors in which researchers used different types of inserts also discussed. This study will help researchers for selecting and designing efficient and innovative heat exchangers with enhanced thermal performance.