Patent ID: 8555912
Filing Date: 2013-10-15
Classification: F01K,Y10T

Abstract:
1. A method of preventing migration of gases into a closed loop organic rankine cycle system during selected periods of time comprising the steps of: establishing a threshold pressure to be maintained in the closed loop organic rankine cycle system in order to prevent migration of gases therein when the closed loop organic rankine cycle system is in a shutdown condition; using a sensor, and sensing a characteristic indicative of the pressure within the closed loop organic rankine cycle system during the shutdown condition; comparing the established threshold pressure with the sensed characteristic indicative of the pressure within the closed loop organic rankine cycle system during the shutdown condition; and providing heat to said closed loop organic rankine cycle system to cause the pressure therein to rise above the threshold pressure when the pressure within the closed loop organic rankine cycle system is at or below the threshold pressure so as to prevent migration of gases into the closed loop organic rankine cycle system.