Surface Scraped Heat Exchanger for cooling Newtonian fluids and enhancing its heat transfer characteristics, a review and a numerical approach

This study is an attempt to identify the factors influencing heat transfer in a Surface Scraped Heat Exchanger (SSHE) and determining its significance in order to facilitate the use of SSHE in various applications. These types of exchangers are employed to heat/cool fluids with high viscosity, sensitive to temperature variations and high affinity for deposition. The rate of the fluid entering the exchanger, revolution velocity of the rotor, shape and the number of blades, and mechanism of applying flux (fixed or variable) to the exchanger are the factors their heat transfer aspects investigated. After a comprehensive review of previous works, as a noble mode of elaborating SSHE, the exchanger is studied numerically to reveal its performance in cooling mode. It is found that, amongst the parameters studied, the revolution velocity of rotor is the most effective one and increasing the RPM improves the SSHE heat transfer performance significantly. (C) 2015 Elsevier Ltd. All rights reserved.