Heat-source profile
Flow, inlet/outlet temperature, condensation or sensible cooling.
ORC & WASTE HEAT RECOVERY
Efficient preheaters, evaporators and condensers for ORC systems
Compact plate and shell equipment can reduce working-fluid charge, installation footprint and heat-transfer irreversibility.
Evaluate an ORC DutyORC equipment
Heat exchangers across the organic Rankine cycle
PreheaterRaises liquid working fluid toward bubble point using low-grade heat.
EvaporatorVaporizes the organic working fluid with controlled pressure drop and distribution.
SuperheaterProvides controlled superheat where required by the expander.
CondenserCondenses working fluid using cooling water or another cooling system.
System benefits
Compact equipment supports packaged ORC design
- Reduced internal volume lowers working-fluid charge
- High heat-transfer coefficient reduces equipment footprint
- Close temperature approach can improve cycle efficiency
- Welded construction is compatible with many organic fluids
- Pressure-vessel design supports elevated working-fluid pressure
- Multiple plate patterns allow liquid, boiling and condensing duties
Two-phase design matters
ORC evaporators must distribute working fluid evenly while limiting pressure drop. Heat-source glide, pinch point and phase-zone allocation are evaluated together rather than using a single average coefficient.
Engineering inputs
Key ORC design factors
Working fluid
R245fa, R124 or project-specific organic fluid properties.
Pinch point
Temperature approach across preheating, boiling and superheat zones.
Pressure drop
Impact on pump work, saturation temperature and expander performance.
Control range
Startup, partial load, heat-source variation and shutdown cases.
REPRESENTATIVE ORC CASE
2 × 900 kW fertilizer-plant waste-heat recovery
ARO supplied plate and shell heat-exchanger duties for preheating and evaporation of R245fa using hot water from an industrial process.