Investigation of performance of heat transfer with the help of coiled wire inserts and dimpled tube

Abstract

Heat transfer enhancement is classified into active and passive methods. Active techniques require external power to type in the process; in comparison, passive methods don't require any extra power to enhance the thermo hydraulic overall performance of the product. Passive techniques are popular in each numerical and experimental uses when investigating heat transfer enhancement and friction losses to help save costs and power. The numerous passive ways for increasing heat transfer rate include different elements placed in the fluid flow path, like coiled wire, coiled and tangled cables, as well nozzle tabulator’s. The existing paper belongs to an extensive review which centered on heat transfer enhancement techniques with coiled wire plus coiled wire inserts because the assembly of inserts is simpler and much more efficient. The study work involves experimentation and numerical evaluation of dimpled tube built with frequently spaced coiled wire inserts. In this paper, the explanation of the experimental set in place and instrumentation used, together with the experimental data and process reduction is presented. The primary goal of the testing is obtaining experimental data pertaining to heat transfer and fluid flow. Unique trials had been carried out with mixtures of dimpled tubes and coiled wire with different Reynolds number for warm fluid and by holding regular flow of cool fluid through annulus.