Thermodynamics Design of 4- stage Helium compressor L. Zhou MMAE, UCF.

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Presentation transcript:

Thermodynamics Design of 4- stage Helium compressor L. Zhou MMAE, UCF

Overall Design constrains Compressor inlet and outlet conditions Inlet: T=58K P=1.65 bar Outlet: T=85K P=4.79 bar Compressor power and mass flow rate – Mass flow rate: 4.19 g/s – Shaft Power input: 918 W – RPM: 200 k – Configuration: 4 impellers, co-axial

Compressor configuration

Thermodynamics chart of the compressor H S P1 Pi P2 Stage1 Stage2 Stage3 Stage4 Intercooler Aftercooler Inlet Point

Stage 1 and 2 Stage1 – IGV Inlet: T=58K, P=1.65bar Outlet: T=59K, P=1.63bar – Impeller Inlet: T=59.3K, P=1. 62bar Outlet: T=63.2K, P=1.77bar – Diffuser Outlet: T=68K, P=2.22bar Stage2 – IGV Inlet: T=67.1K, P=2.24bar Outlet:T=67.6K, P=2.22bar – Impeller Inlet: T=68K, P=2.22bar Outlet: T=72.3K, P=2.47bar – Diffuser Outlet: T=75K, P=2.98bar

Intercooler Intercooler inlet: 75K Intercooler Outlet: 60K Heat exchanged: 328 W Pressure loss: 3.5%

Stage 3 and 4 Stage3 – IGV Inlet: T=60K, P=2.87bar Outlet: T=60.7K, P=2.85bar – Impeller Inlet: T=60.8K, P=2.84bar Outlet: T=66.2K, P=3.12bar – Diffuser Outlet: T=73.3K, P=3.84bar Stage4 – IGV Inlet: T=73.5K, P=3.83bar Outlet:T=73.6K, P=3.83bar – Impeller Inlet: T=73.6K, P=3.82bar Outlet: T=77.8K, P=4.15bar – Diffuser Outlet: T=85K, P=4.92bar

Aftercooler Intercooler inlet: 85K Intercooler Outlet: 59.5K Heat exchanged: W Pressure loss: 4.5%