Optimization-Based Design and Selection of Working Fluids for Heat Transfer: Case Study in Heat Pipes

Abstract

In this paper, an in silico methodology for optimizing/designing working fluids for heat transfer is presented. The method is tested for heat pipe fluids using a validated model of an evacuated tube solar water heater as a case study. Two model modes are assessed: one simplistic temperature-independent mode and one more complex temperature-dependent mode. The method demonstrates successful optimization of working fluid properties rapidly leading to optimal design of real working fluid mixtures, thus avoiding laborious and time-consuming trial-and-error experimentation. Simulations of solar water heaters with optimized working fluids lead to overall performance improvements in the order of 40%