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Technical Paper

Improving Range Robustness: Heat Pump Value for Plug-In Electric Vehicles

2017-03-28
2017-01-1161
Integration of a new, complex technology which crosses powertrain system boundaries (and thereby involves multiple organizations), at the optimum cost-attribute balance, is a complex task. An example of such a technology is a Vapor-Compression Heat Pump (VCHP) system. A VCHP system uses a vapor-compression refrigeration cycle to ‘pump’ heat from ambient into the cabin. This system can be used to supplement or replace other less efficient heating systems (e.g. engine, LV-PTC air heater, HV-PTC coolant heater, etc.) - which will improve fuel economy. The use of a heat pump system impacts several primary attributes, including heating, cooling, fuel economy, and electric range. These attributes must be balanced in an ideal fashion against the substantial expense, if a VCHP is to be selected for use in a particular vehicle. This paper walks through the value equation for the VCHP from start to end, addressing potential concerns and opportunities.
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