Secondary loop reversible AC/HP system for electric vehicles

Kaiser, David James

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https://hdl.handle.net/2142/89063 Copy

Description

Title

Secondary loop reversible AC/HP system for electric vehicles

Author(s)

Kaiser, David James

Issue Date

2015-12-09

Director of Research (if dissertation) or Advisor (if thesis)

Hrnjak, Predrag S.

Department of Study

Mechanical Science & Engineering

Discipline

Mechanical Engineering

Degree Granting Institution

University of Illinois at Urbana-Champaign

Degree Name

M.S.

Degree Level

Thesis

Date of Ingest

2016-03-02T19:34:30Z

Keyword(s)

• Secondary Loop System
• Indirect System
• Heat pump
• Heat pump for Electric Vehicles
• Electric Vehicles
• David Kaiser
• air conditioning (A/C) system for Electric Vehicles

Abstract

This paper presents experimentally obtained results of a secondary loop air conditioning-heat pump system compared to a baseline direct system. The secondary loop system has a refrigerant circuit operating between two 50/50 water glycol loops, and uses the identical compressor and accumulator as the baseline DX system. For most operating conditions in this study, the secondary loop system has slightly lower maximum capacity and lower COP/HPF compared to the DX system, while it has potential for integrated thermal management, waste heat recovery, and may allow better refrigerants to be used due to compact refrigerant loop design. It was found that system refrigerant charge needed for cooling was close to that for heating, and was about 200g less than required by the baseline. Operating parameters including compressor and pump speeds, air flow rates, and condenser exit subcooling were investigated to improve energy efficiency. Performance in different ambient conditions was also studied and compared to the baseline.

Graduation Semester

2015-12

Type of Resource

text

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http://hdl.handle.net/2142/89063

Copyright and License Information

Copyright 2015 David James Kaiser

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