Patent ID: 8141362
Filing Date: 2012-03-27
Classification: F24D,F28D,F28F

Abstract:
1. A closed cycle heat transfer device comprising an evaporator and a first condenser, a first fluid duct for transporting a heated fluid from the evaporator to the first condenser, and a second fluid duct for returning condensate from the first condenser to the evaporator; by an expansion device connected to and in communication with the second fluid duct to receive liquid condensate therefrom thus to compensate for expansion of a fluid vapour phase in at least the first fluid duct, wherein at least one further condenser is connected to the first fluid duct and to the second fluid duct to receive working fluid in a vapour phase in response to a rise in pressure and temperature of the working fluid issuing from the evaporator, and the height of the further condenser is selected in relation to that of the boiler and the first condenser, so that the additional vapour space generated by the increased pressure starts to expose the heat transfer surface of the at least one further condenser when the required pressure is reached; and/or a regulating valve is disposed between the at least one further condenser and the second fluid duct.