Abstract
Vapor injection heat pumps have been proposed for cabin heating in electric vehicles (EVs) to improve the performance and reliability under severe weather conditions. However, the geometric optimizations of the injection-port and internal heat exchanger (IHX) in vapor injection heat pumps designed for EVs have rarely been investigated. The objective of this study is to investigate the effects of the injection-port angle and IHX length in a vapor injection heat pump for use in EVs at various startup conditions. The heating performance of a vapor injection heat pump with R134a is measured by varying the IHX length from 100 to 400 mm and injection-port angle from 320° to 440° at various cabin temperatures. The effects of the IHX length and injection-port angle are analyzed in terms of coefficient of performance (COP) and heating capacity. The optimum IHX length and injection-port angle for the maximum COP are determined to be 300 mm and 400°, respectively.
| Original language | English |
|---|---|
| Article number | 116751 |
| Journal | Energy |
| Volume | 193 |
| DOIs | |
| Publication status | Published - 2020 Feb 15 |
Bibliographical note
Publisher Copyright:© 2019 Elsevier Ltd
Keywords
- Electric vehicle
- Heat pump
- Injection port
- Internal heat exchanger
- Vapor injection
ASJC Scopus subject areas
- Mechanical Engineering
- General Energy
- Pollution
- Energy Engineering and Power Technology
- Electrical and Electronic Engineering
- Management, Monitoring, Policy and Law
- Industrial and Manufacturing Engineering
- Building and Construction
- Fuel Technology
- Renewable Energy, Sustainability and the Environment
- Civil and Structural Engineering
- Modelling and Simulation
