Vacuum deaeration for ocean thermal-energy-conversion open-cycle applications
Conference
·
OSTI ID:6427844
Seawater deaeration is a process affecting almost all proposed Ocean Thermal Energy Conversion (OTEC) open-cycle power systems. If the noncondensable dissolved air is not removed from a power system, it will accumulate in the condenser, reduce the effectiveness of condensation, and result in deterioration of system performance. A gas desorption study was initiated at Oak Ridge National Laboratory (ORNL) with the goal of mitigating these effects; this study is designed to investigate the vacuum deaeration process for low-temperature OTEC conditions where conventional steam stripping deaeration may not be applicable. Studies were carried out on two areas: (1) vacuum deaeration in a packed column; and (2) deaeration in the barometric leg of the intake system. The design of a gas desorption test loop and a barometric intake system are described, the results of vacuum deaeration in a packed column and a barometric intake system are presented, and the saving that can be achieved when the packed column is combined with the barometric system is discussed. Vacuum deaeration laboratory experiments of three different kinds of packing in a packed column test section and a series of barometric intake deaeration experiments have been performed. A conceptual OTEC deaeration subsystem design based on these results and its implications upon an OTEC open cycle power system are presented.
- Research Organization:
- Oak Ridge National Lab., TN (USA)
- DOE Contract Number:
- W-7405-ENG-26
- OSTI ID:
- 6427844
- Report Number(s):
- CONF-810574-1
- Country of Publication:
- United States
- Language:
- English
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