Gas generator set

stationaryindustrial

Overview
Industrial sites often discharge significant waste heat and residual pressure, resulting in energy loss and environmental impact. Kaishan provides screw-expander-based solutions to convert waste heat and residual pressure into electrical power, suitable for a range of industrial heat sources.

Product types and solutions

• Direct expansion generator sets using residual pressure
• Organic Rankine Cycle (ORC) generator sets driven by waste heat
• Combined architectures: single-stage or cascade direct expansion, single-stage or cascade ORC, and direct expansion + ORC cascades

Screw expander design and working principle
The screw expander is a positive-displacement expansion machine, typically a twin-screw design. Kaishan screw expanders are optimized for gas/steam expansion and comprise a casing and a pair of intermeshing screw rotors. High-pressure gas or steam enters the working chamber, undergoes near-adiabatic expansion and drives the rotors, converting thermal/pressure energy into mechanical power. The inlet can accept saturated or two-phase steam, and the screw configuration sustains high isentropic efficiency across a wide load range.

Applications and track record
Kaishan screw expansion generator sets are applied in steel industry waste-heat recovery, industrial residual-pressure power, geothermal power and bioenergy projects. Kaishan has completed more than 90 screw expansion power generation projects across steel, petrochemical, plastics, chemical fiber, geothermal and biomass sectors.

Global operations
Kaishan has invested in, built and operated overseas geothermal power plants; its equipment and operational capabilities are recognized internationally, positioning Kaishan among global suppliers of geothermal and expansion-based power generation systems.

Characteristics / technical specifications

• Product family: Expansion power generation systems based on screw expanders
• Primary technologies: Direct expansion (residual pressure) and ORC (waste heat)
• Cycle configurations: Single-stage or cascade direct expansion; single-stage or cascade ORC; combined direct expansion + ORC
• Expander type: Twin-screw positive-displacement expander
• Key components: Casing and pair of intermeshing screw rotors
• Working fluids: High-pressure gas or steam (supports saturated or two-phase inlet)
• Performance: Maintains high isentropic efficiency over wide load range
• Typical industries: Steel, petrochemical, plastics, chemical fiber, geothermal, biomass, industrial residual pressure
• Project experience: Over 90 screw expansion power generation projects completed