Optimization design of duct fan and evaporator module in refrigeration system with heat exchange and fan power

Abstract

Since the evaporator system has been wildly applied in industry, its operating performance needs to be optimized to reduce energy consumption. Considering the evaporator, duct and fan as basic module, the matching relationship of these components must be analyzed and discussed. In this paper, to improve the design efficiency in module structure, the method to identify the design parameters and establish their mapping relationship is presented, and the structural design model of rectangular duct with finned evaporator is given. After analyzing the structural parameters of evaporator and fan in air cooling duct, the structural design of the evaporator and duct fan is identified in three geometrical parameters, which are the basic design variables in this evaporation structure. First, the simulation model of duct fan and evaporator is established, and air flow and heat distribution under variable structural parameters is simulated and compared with the experimental data gathered from the refrigeration module platform. Then, the relationship between three structural parameters and operating performance (the heat transfer and fan power) are discussed, and this quantitative mapping model is established as the design reference for evaporation structure. Finally, the optimized design is given with the energy performance evaluation in the evaporation and duct module, and this optimized design results are proposed as the structural parameter references in the case study.

Keywords

• rectangular duct
• finned-tube evaporator
• heat exchange
• fan power
• optimization design