Method for operating a thermodynamic circuit, as well as a...

F - Mech Eng,Light,Heat,Weapons – 01 – K

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F01K 7/00 (2006.01) F01K 25/06 (2006.01) F01K 27/00 (2006.01) F03G 4/00 (2006.01)

Patent

CA 2713799

The invention relates to a thermodynamic cycle (1) with at least: - one first heat exchanger (W1) for creating a first heated or partially evaporated working medium flow (15) by heating or partially evaporating a liquid working medium flow (14) by heat transmission from an expanded working medium flow (12); - a second heat exchanger (W2) for creating a second at least partially evaporated working medium flow (18); - a separator (4) for separating a liquid phase (19) from a vaporous phase (10) of the second working medium flow (18); - an expansion device (2) for creating an expanded vaporous phase (10). According to the invention, pressure pulsations are prevented during the start-up of the cycle in that the vaporous phase (10) separated by the separator (4) is conducted past the expansion device (2) and the first heat exchanger (W1). The liquid phase (19) separated by the separator (4) is cooled in the first heat exchanger (W1) by heat transfer to the liquid working medium flow (14). After the first heat exchanger (W1), the cooled, separated, liquid phase and the separated vaporous phase (10) are brought together.

L'invention concerne un circuit thermodynamique (1) comprenant au moins un premier échangeur de chaleur (W1) destiné à la production d'un premier flux de fluide de travail (15) chauffé ou partiellement évaporé par augmentation de la température ou évaporation partielle d'un flux de fluide de travail liquide (14) par transfert de chaleur avec un flux de fluide de travail détendu (12), un second échangeur de chaleur (W2) destiné à la production d'un second flux de fluide de travail (18) au moins partiellement évaporé, un séparateur (4) destiné à séparer une phase liquide (19) d'une phase vapeur (10) du second flux de fluide de travail (18) ainsi qu'un dispositif de détente (2) destiné à produire une phase vapeur détendue (11). Selon l'invention, des pulsations de pression au démarrage du circuit sont évitées par le fait que la phase vapeur (10), séparée par le séparateur (4), est amenée près du dispositif de détente (2) et du premier échangeur de chaleur (W1); la phase liquide (19), séparée par le séparateur (4), est refroidie dans le premier échangeur de chaleur (W1) par transfert de chaleur avec le flux de fluide de travail liquide (14) puis la phase liquide séparée refroidie et la phase vapeur (10) séparée sont réunies en aval du premier échangeur de chaleur (W1).

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