Control system for cheng dual-fluid cycle engine system
A dual-fluid heat engine is described which is operated to produce co-generated process steam having: a chamber; compressor means for introducing a first gaseous working fluid comprising air into the chamber, the compressor means having a predetermined pressure ratio (CPR); means for introducing a second liquid-vapor working fluid comprising water in the form of a vapor within the chamber at a defined water/air working fluid ratio (XMIX); means for heating the water vapor and air in the chamber at a defined specific heat input rate (SHIR); turbine means responsive to the mixture of the first and second working fluids for converting the energy associated with the mixture to mechanical energy, the temperature of the mixture entering the turbine means defining the turbine inlet temperature (TIT) and having a design maximum turbine inlet temperature (TITmax); counterflow heat exchanger means for transferring residual thermal energy from the exhausted mixture of first and second working fluids to the incoming working fluid water to thereby preheat the same to water vapor prior to its introduction within the chamber; means for diverting water vapor from the chamber, if desired, for co-generated process steam; and wherein the improvement comprises: means for operating the engine under partial load conditions such that when substantially no co-generated process steam is required. The engine control path follows a locus of peak efficiency points resulting in declining TIT as the load decreases, and such that XMIX and SHIR are selected so that for a given value of TIT, XMIX is at or near XMIX peak, where XMIX peak occurs when conditions are met simultaneously.
- Assignee:
- International Power Technology, Inc., Palo Alto, CA
- Patent Number(s):
- US 4680927
- OSTI ID:
- 6256130
- Resource Relation:
- Patent File Date: Filed date 25 Jul 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
HEAT ENGINES
CONTROL SYSTEMS
COGENERATION
DUAL-FUEL ENGINES
GAS COMPRESSORS
HEAT EXCHANGERS
HEATERS
INCIDENCE ANGLE
STEAM
TURBINES
WATER VAPOR
WIRES
WORKING FLUIDS
COMPRESSORS
DEUS
ENERGY SYSTEMS
ENGINES
FLUIDS
GASES
MACHINERY
POWER GENERATION
STEAM GENERATION
TURBOMACHINERY
VAPORS
330603* - Vehicle Design Factors- Engine System