Products

The screw rotor steam engine

Is intended for driving an electricity generator and subsequent utilization of the low-pressure steam for the boiler station auxiliaries. The SRSE uses a rotor mechanism (a screw pair) as the principal operating element. Its drive shaft is connected to a generator or another driven device (a pump, a smoke extractor, etc.).

Steam inlet Screw expander Steam outlet Generator Clutch Oil system

Compactness
Simple design
High repairability

May use low-quality steam
Flexibility, quick start and shutdown
Power control range: 15…100 %

Stable output shaft torque
Operation reliability and fail-safety
Potentially high service life (because rotors do not contact each other)

SRSA Specifications

Turbine type	Steam
Operating medium	Saturated water steam
Steam specifications
Inlet pressure	0,6...1,4 MPa (6...14 kgf/cm²)
Inlet temperature	maximum 468°K (195°C)
Outlet pressure	0.5… 0.4 MPa (1.5… 4 kgf/cm²)
Outlet temperature	maximum 393°K (120°C)
Mass steam flow	up to 20,000 kg/h
Input rotor rotation frequency	6000 rpm
Output shaft rotation frequency	3000 rpm
Output shaft power	250...1000 kW
Internal turbine efficiency n_oi	67...70%
Voltage	380 V, 6 kV, 10 kV
Current frequency	50 Hz
Expander dimensions	2420 x 1300 x 1440 mm (L x W x H)
Expander weight	3500 (2000) kg
Lubrication system	Circulating, positive pressure, oil pump-driven
Recommended oil	TP-46 turbine oil GOST ГОСТ 9972-74
Air noise level	Maximum 95 dB

Main view of the turbine case (isometry)

The power plant permits to use excess enrgy of expanding steam and to obtain mechanical energy used for generation of electricity without burning additional fuel in boilers.

The plant is very easy to operate and maintain, it has a high service life, operation reliability and safety, may use low-quality steam.

The electric system of the power plant power takeoff based on an asynchronous generator operating in parallel with the mains guarantees high reliability. Power output into the mains does not destabilize them.