Sealing systems for turboexpanders for use in organic Rankine cycles
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United States of America Patent
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Nov 21, 2017
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app pub date -
Mar 29, 2012
filing date -
Mar 29, 2011
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Abstract
Methods and systems for controlling infiltration of ambient air into, and exfiltration of process gas out of, an organic Rankine system. A system comprises a first sealing mechanism configured to seal at least one shaft against exfiltration of a process gas when the turbomachine is operating. The system further comprises a second sealing mechanism configured to seal the at least one shaft against infiltration of ambient air when the system is in a standstill mode. The system further comprises one or more pressure sensors configured to detect a pressure of gas within the system to monitor whether infiltration of ambient air has occurred and a system purge is needed.
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