Inverse approach to vehicle evaporator design optimizationand cooling capacity estimation

摘要

This presention focuses on two very important applications of the inverse heat transfer approach to identification of thermal boundary parameters of heat exchangers for vehicle heating, ventilation, and air-conditioning (HVAC) systems. First application is the design optimization of the evaporator in the HVAC system. Because the identified heat flux is a function of the evaporator being investigated. or to be more specific, the function of the frontal area of the evaporator, it is possible to solve a number of external inverse heat transfer problems to find an interconnection between size of evaporator (size of frontal area), air-device heat transfer, and evaporator outer surface temperature. In the course of designing an HVAC system this interconnectioin enables us to make a preliminary inverse selection of evaporator size satisfying evaporator heat transfer and/or cooling capacity requiurements. This cooling capacity of the evaporator is the second application that this presentiation discusses. Using the calculated total evaporator heat transfer (function of heat flux and frontal area) and based on enthanalpy analysis, the evaporator cooling capacity can be determined