Increasing EDV Range through Intelligent Cabin Air Handling Strategies: Annual Progress Report

Leighton, Daniel¹  Rugh, John¹ 

[1] National Renewable Energy Lab. (NREL), Golden, CO (United States)

关键词: computational fluid dynamics;    CFD;    automotive HVAC system;    EV;    split flow HVAC system;   

DOI  :  10.2172/1293807
RP-ID  :  NREL/MP--5400-65054
PID  :  OSTI ID: 1293807

学科分类：航空航天科学

美国|英语

来源: SciTech Connect

【 摘 要 】

Computational fluid dynamics (CFD) simulations of a Ford Focus Electric demonstrated that a split flow heating, ventilating and air conditioning (HVAC) system with rear recirculation ducts can reduce cabin heating loads by up to 57.4% relative to full fresh air usage under some conditions (steady state, four passengers, ambient temperature of -5 deg C). Simulations also showed that implementing a continuous recirculation fraction control system into the original equipment manufacturer (OEM) HVAC system can reduce cabin heating loads by up to 50.0% relative to full fresh air usage under some conditions (steady state, four passengers, ambient temperature of -5 deg C). Identified that continuous fractional recirculation control of the OEM system can provide significant energy savings for EVs at minimal additional cost, while a split flow HVAC system with rear recirculation ducts only provides minimal additional improvement at significant additional cost.