Transposed critical temperature Rankine thermodynamic cycle

Technical Report · Tue Apr 01 00:00:00 EST 1980

DOI:https://doi.org/10.2172/5263189· OSTI ID:5263189

Pope, W L; Doyle, P A

The transposed critical temperature (TPCT) is shown to be an extremely important thermodynamic property in the selection of the working fluid and turbine states for optimized geothermal power plants operating on a closed organic (binary) Rankine cycle. When the optimum working fluid composition and process states are determined for given source and sink conditions (7 parameter optimization), turbine inlet states are found to be consistently adjacent to the low pressure side of the working fluids' TPCT line on pressure-enthalpy coordinates. Although the TPCT concepts herein may find numerous future applications in high temperature, advanced cycles for fossil or nuclear fired steam power plants and in supercritical organic Rankine heat recovery bottoming cycles for Diesel engines, this discussion is limited to moderate temperature (150 to 250/sup 0/C) closed simple organic Rankine cycle geothermal power plants. Conceptual design calculations pertinent to the first geothermal binary cycle Demonstration Plant are included.

• Research Organization: Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5263189
• Report Number(s): LBL-10312
• Country of Publication: United States
• Language: English

Related Subjects

15 GEOTHERMAL ENERGY
BINARY-FLUID SYSTEMS
OPTIMIZATION
THERMODYNAMICS
GEOTHERMAL POWER PLANTS
RANKINE CYCLE
CRITICAL TEMPERATURE
DEMONSTRATION PLANTS
DESIGN
GEOTHERMAL ENERGY CONVERSION
SPECIFIC HEAT
TURBINES
WORKING FLUIDS
CONVERSION
ENERGY CONVERSION
FLUIDS
MACHINERY
PHYSICAL PROPERTIES
POWER PLANTS
THERMAL POWER PLANTS
THERMODYNAMIC CYCLES
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
TURBOMACHINERY
Geothermal Legacy
150802* - Geothermal Power Plants- Power Plant Systems & Components