๐ Rotary Twin-Screw Compressor Sizer
Size industrial rotary twin-screw compressors: built-in volume ratio Vi matching, over/under-compression losses, oil injection cooling, and shaft power demand.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
Turbomachinery
๐ Solver Telemetry
โ ACTIVE
๐๏ธ Views
31
โก Solves
24
๐พ Downloads
446
๐ฆ Fortran Code
5.2 KB
๐
Released
Jun 2026
โฑ๏ธ Latency
< 1 ms
๐ Intermeshing Male/Female Helical Screw Rotors & Oil Spray
Real-time visual simulation: Suction pocket trapping, continuous screw meshing compression, and oil cooling๐ Configuration & Presets
๐จ Industrial Air (8.5 bar)
โ๏ธ Ammonia Cold Booster
๐ฅ Biogas 16 bar Injection
๐ฟ Propane R290 Chiller
Twin-Screw Compressor Formulation:
โข Built-in Pressure Ratio: ฮ i = Vik
โข Indicator Work: Wind = [k/(kโ1)]ยทP1ยทV1ยท[Vikโ1โ1] + (P2โฮ iยทP1)ยท(V1/Vi) [kW]
โข Shaft Power: Pshaft = Wind / 0.92 [kW]
โข Oil Cooling: controls discharge temperature to ~75โ90ยฐC.
โข Built-in Pressure Ratio: ฮ i = Vik
โข Indicator Work: Wind = [k/(kโ1)]ยทP1ยทV1ยท[Vikโ1โ1] + (P2โฮ iยทP1)ยท(V1/Vi) [kW]
โข Shaft Power: Pshaft = Wind / 0.92 [kW]
โข Oil Cooling: controls discharge temperature to ~75โ90ยฐC.
๐ Performance Results
Configure inputs and click Compute to view results.
๐ Calculation Methodology & Screw Compressor Standards
Built-in Volume Ratio ($V_i$) & Indicator Losses
Twin screw compressors have a fixed internal volume ratio $V_i$. If the system pressure ratio differs from $V_i^k$, thermodynamic over-compression or under-compression indicator losses occur upon discharge port opening.
Oil Injection & Temperature Control
Oil flooded into the compression pocket seals rotor clearances and absorbs over 80% of the compression work, keeping discharge gas temperatures well below $100^\circ\text{C}$.
Key Engineering Assumptions
- ISO 1217 positive displacement compressor standards.
- API 619 oil-injected rotary screw compressor design.
- Widely used in industrial plant air systems, ammonia cold storage, and biogas boosting.