scholarly journals Finalize field testing of cold climate heat pump (CCHP) based on tandem vapor injection compressors

2017 ◽  
Author(s):  
Bo Shen ◽  
Van D. Baxter ◽  
Omar Abdelaziz ◽  
C. Keith Rice
Keyword(s):  
Heat Pump ◽  
Field Testing ◽  
Cold Climate ◽  
Vapor Injection

Cold Climate Heat Pump Using Tandem Vapor-Injection Compressors

2018 ◽  
pp. 429-439 ◽  
Author(s):  
Bo Shen ◽  
Omar Abdelaziz ◽  
Van Baxter ◽  
Edward Vineyard
Keyword(s):  
Heat Pump ◽  
Cold Climate ◽  
Vapor Injection

Theoretical investigation on the heating performance of a recuperative heat pump water heater using CO2/HCs with large temperature glides in cold regions

2021 ◽  
pp. 1-22
Author(s):  
Jielin Luo ◽  
Qin Wang ◽  
Zhen Zhao ◽  
Kaiyin Yang ◽  
Guangming Chen ◽  
...  
Keyword(s):  
Heat Pump ◽  
Temperature Difference ◽  
Hot Water ◽  
Large Temperature ◽  
Water Heater ◽  
Ambient Temperatures ◽  
Heating Performance ◽  
Heat Pump Water Heater ◽  
Vapor Injection ◽  
Injection Cycle

Abstract Considering the issues of environmental pollution and energy efficiency, heat pumps are gradually replacing traditional coal combustion for heating at low ambient temperatures. In this paper, eco-friendly CO2/HCs with large temperature glides are applied in a single-stage recuperative heat pump water heater. Its heating performance is theoretically investigated under the working condition of producing circulating hot water in typical winter of northern China, with medium temperature difference between supply/return water and large temperature difference between air inlet and water inlet. Due to its simple structure, low initial investment and high efficiency, its potential for producing circulating hot water is demonstrated. Exergy analyses are conducted to reveal the significant influence of the exergy losses of heat exchanger on system performance. For specified CO2/HC, optimal COP is obtained through global optimization of cycle pressures and mixture concentration. The heating performances of different CO2/HCs are compared, among which CO2/R600 and CO2/R600a behave better. Meanwhile, a typical vapor-injection cycle is used to demonstrate priorities on the heating performance of this recuperative cycle, in which the COP of recuperative cycle using CO2/R600 is more than 3.4% higher than that of the vapor-injection cycle. The results obtained in this paper provide a simple and efficient solution for producing circulating hot water at low ambient temperatures.

scholarly journals DEVELOPMENT OF A HIGH PERFORMANCE COLD CLIMATE HEAT PUMP

2014 ◽  
Author(s):  
W. Travis Horton ◽  
◽  
Eckhard A. Groll ◽  
James E. Braun
Keyword(s):  
Heat Pump ◽  
High Performance ◽  
Cold Climate

scholarly journals Performance Analysis of High-temperature Two-stage Compression Heat Pump with Vapor Injection Dynamic Control

2020 ◽  
Vol 32 (12) ◽  
pp. 4259
Author(s):  
Win-Jet Luo ◽  
Jin-Chang Lai ◽  
Ming-Chu Hsieh ◽  
I-Hsing Huang
Keyword(s):  
High Temperature ◽  
Performance Analysis ◽  
Heat Pump ◽  
Dynamic Control ◽  
Two Stage ◽  
Vapor Injection
Sign in / Sign up

Export Citation Format

Share Document