Optimization of Refrigerant Flow Management in a Dual-Unit Air Conditioning System

Paper #:
  • 2000-01-0975

Published:
  • 2000-03-06
Citation:
Ye, L., Martin, D., and Faulkner, T., "Optimization of Refrigerant Flow Management in a Dual-Unit Air Conditioning System," SAE Technical Paper 2000-01-0975, 2000, https://doi.org/10.4271/2000-01-0975.
Affiliated:
Pages:
14
Abstract:
Optimization of vehicle air conditioning performance at various drive cycles and ambient conditions can be achieved by regulating and distributing the refrigerant flow entering evaporators. Thermostatic expansion valve (TXV), as a flow control device, has been a key element in improving vehicle A/C system operating efficiency and maximizing cooling capacity. Three scenarios are addressed in this paper: (a) the selection of TXVs for a sports utility vehicle (SUV) climate control system, in which a front HVAC unit and an auxiliary HVAC unit are installed; (b) the methodology of developing a goal-oriented criterion for identifying the TXV combination to fulfill the optimization of A/C system performance; and (c) the analytical and experimental evaluation of vehicle cooling performance by varying TXV combinations in various vehicle operating modes.
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