Summary of the research and development effort on the supercritical CO/sub 2/ cycle

Technical Report · Mon Jun 01 00:00:00 EDT 1981

DOI:https://doi.org/10.2172/6781034· OSTI ID:6781034

Fraas, A. P.

The supercritical CO/sub 2/ cycle has the advantage over a conventional closed-cycle gas turbine in that the compression work phase of the cycle can be carried out close to the critical point and hence aerodynamic losses in the compressor are reduced and the cycle efficiency increased for a given turbine inlet temperature. However, the practicable turbine inlet temperature is reduced by permissible stresses in the heater tubes because the peak pressure in the cycle must be approx. 260 atm in order to have the compression process take place close to the critical point of the working fluid. The high system pressure also makes the capital cost of the heat exchangers and gas piping higher than that for a conventional closed-cycle gas turbine. Further, the waste heat from the cycle must be rejected at too low a temperature for it to be useful for industrial process heat or for district heating systems.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6781034
• Report Number(s): ORNL/TM-6236
• Country of Publication: United States
• Language: English

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200101* - Fossil-Fueled Power Plants- Cooling & Heat Transfer Equipment & Systems