Modeling of a Two-Stage Rotary Compressor

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.

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Research on the Vapor Injection of Two-stage Rotary Compressor

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/604/1/012072 ◽

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

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Development of capacity modulation compressor based on a two stage rotary compressor – part I: Modeling and simulation of compressor performance

International Journal of Refrigeration ◽

10.1016/j.ijrefrig.2015.02.007 ◽

2015 ◽

Vol 54 ◽

pp. 22-37 ◽

Cited By ~ 10

Author(s):

Seung-jun Lee ◽

Jaesool Shim ◽

Kyung Chun Kim

Keyword(s):

Modeling And Simulation ◽

Rotary Compressor ◽

Two Stage ◽

Compressor Performance ◽

Capacity Modulation

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The selection of volume ratio of two-stage rotary compressor and its effects on air-to-water heat pump with flash tank cycle

Applied Energy ◽

10.1016/j.apenergy.2012.11.021 ◽

2013 ◽

Vol 104 ◽

pp. 187-196 ◽

Cited By ~ 37

Author(s):

Younghwan Ko ◽

Sangkyoung Park ◽

Simon Jin ◽

Byungsoon Kim ◽

Ji Hwan Jeong

Keyword(s):

Heat Pump ◽

Volume Ratio ◽

Rotary Compressor ◽

Two Stage ◽

Flash Tank ◽

Selection Of

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Development of capacity modulation compressor based on a two-stage rotary compressor – Part ΙΙ: Performance experiments and P–V analysis

International Journal of Refrigeration ◽

10.1016/j.ijrefrig.2015.09.008 ◽

2016 ◽

Vol 61 ◽

pp. 82-99 ◽

Cited By ~ 1

Author(s):

Seung-jun Lee ◽

Jaesool Shim ◽

Kyung Chun Kim

Keyword(s):

Rotary Compressor ◽

Two Stage ◽

Capacity Modulation

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G212 Two-Stage Rotary Compressor for CO_2 Refrigerant Injection Cycle

The Proceedings of the Thermal Engineering Conference ◽

10.1299/jsmeted.2007.401 ◽

2007 ◽

Vol 2007 (0) ◽

pp. 401-402

Author(s):

Tetsuhide YOKOYAMA ◽

Toshihide KODA ◽

Shin SEKIYA ◽

Kei SASAKI ◽

Hideaki MAEYAMA

Keyword(s):

Rotary Compressor ◽

Two Stage ◽

Injection Cycle

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Two-stage self-seeding method for preparation of single crystals of poly(phenylene sulfide)

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100153816 ◽

1989 ◽

Vol 47 ◽

pp. 368-369

Author(s):

Sengshiu Chung ◽

Peggy Cebe

Keyword(s):

Single Crystals ◽

High Performance ◽

Dilute Solution ◽

Two Stage ◽

Annealing Behavior ◽

High Performance Polymers ◽

Seeding Method ◽

Phenylene Sulfide

We are studying the crystallization and annealing behavior of high performance polymers, like poly(p-pheny1ene sulfide) PPS, and poly-(etheretherketone), PEEK. Our purpose is to determine whether PPS, which is similar in many ways to PEEK, undergoes reorganization during annealing. In an effort to address the issue of reorganization, we are studying solution grown single crystals of PPS as model materials.Observation of solution grown PPS crystals has been reported. Even from dilute solution, embrionic spherulites and aggregates were formed. We observe that these morphologies result when solutions containing uncrystallized polymer are cooled. To obtain samples of uniform single crystals, we have used two-stage self seeding and solution replacement techniques.

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