scholarly journals Research on the Vapor Injection of Two-stage Rotary Compressor

2019 ◽  
Vol 604 ◽  
pp. 012072
Author(s):  
Y S Hu ◽  
H J Wei ◽  
B Yu ◽  
O X Yang ◽  
J Wang ◽  
...  
Keyword(s):  
Rotary Compressor ◽  
Two Stage ◽  
Vapor Injection

scholarly journals Y. S. Hu, H. J. Wei, B. Yu, O. X. Yang, J. Wang, J. Wu. Research on the vapor injection of two-stage rotary compressor / trans. from Engl. M. A. Fedorova

2021 ◽  
Vol 5 (4) ◽  
pp. 65-74
Author(s):  
M. A. Fedorova ◽  
Keyword(s):  
Flow Characteristics ◽  
Mass Conservation ◽  
Conservation Equation ◽  
Rotary Compressor ◽  
Two Stage ◽  
Injection Channel ◽  
Injection Flow ◽  
Vapor Injection ◽  
Intermediate Chamber ◽  
Mass Conservation Equation

In order to understand the vapor injection flow characteristics of two-stage rotary compressor in the course of compression, a mathematical model based on mass conservation equation, energy equation and thermodynamic identity was established and proved by P-V diagram testing results. Some useful conclusions about pressure in the intermediate chamber and mass flow of vapor injection in the course of compression were also given out. The results show that, gas backflow between the intermediate chamber and the vapor injection channel is an important defection of two-stage rotary compressor which can be solved by the application of injection valve in vapor injection channel. The injection valve can obviously reduce the gas backflow and the power loss in the course of compression while increasing the pressure fluctuation in the intermediate chamber. Experiments show that the COP of two-stage rotary compressor with the injection valve increased by over 2% in ASHRAE/T working condition.

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

Modeling of a Two-Stage Rotary Compressor

2008 ◽  
Vol 14 (5) ◽  
pp. 719-748 ◽  
Author(s):  
Margaret Mathison ◽  
James Braun ◽  
Eckhard Groll
Keyword(s):  
Rotary Compressor ◽  
Two Stage

Development of a Novel Two-Stage Heat Pump Clothes Dryer

2014 ◽  
Author(s):  
Tao Cao ◽  
Jiazhen Ling ◽  
Yunho Hwang ◽  
Reinhard Radermacher
Keyword(s):  
Heat Exchanger ◽  
Heat Pump ◽  
Energy Savings ◽  
Design Tool ◽  
Department Of Energy ◽  
Two Stage ◽  
Heat Exchanger Design ◽  
Clothes Dryer ◽  
Vapor Injection ◽  
Injection Cycle

An energy efficient two-stage heat pump clothes dryer (HPCD) was successfully developed. This new dryer utilizes three advanced technologies: vapor injection cycle, compact heat exchanger and brushless direct current (BLDC) fan motor. An in-house heat exchanger design tool – CoilDesigner was utilized to design and optimize the evaporator and condenser in the vapor injection cycle. One electric clothes dryer (CD) from U.S. market was selected as the baseline product, and one hybrid HPCD from European market was selected as the best state-of-the-art commercial product in terms of energy efficiency. These two commercial products and the constructed two-stage HPCD prototype were tested according to the Department of Energy (DOE) dryer test standards. Experimental evaluation revealed that the two-stage HPCD achieved 59% energy savings and improved energy factor (EF) by 143% as compared to the electric dryer. It also achieved 25% energy savings and improved EF by 33% as compared to the hybrid HPCD. This implied that the two-stage HPCD could save energy up to 42 TW·h annually if this technology is fully deployed to replace all U.S. electric CDs. Cost analysis indicates that the payback period of the two-stage HPCD is only 2.2 years as compared to the electric dryer with bottom cabinet. Therefore, the two-stage HPCD is an economically competitive greener option.

scholarly journals Analysis and optimization of subcritical two-stage vapor injection heat pump systems

2014 ◽  
Vol 124 ◽  
pp. 231-240 ◽  
Author(s):  
A. Redón ◽  
E. Navarro-Peris ◽  
M. Pitarch ◽  
J. Gonzálvez-Macia ◽  
J.M. Corberán
Keyword(s):  
Heat Pump ◽  
Two Stage ◽  
Vapor Injection
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