An evaporation and absorption unit

摘要

An evaporator for an absorption heat pump or a single coolant cooling process comprises a number of stacked plates 200; 400 provided with a pressed pattern to hold the plates on a distance from one another to form a heat exchanging strip 300; 500; 700; 2002, vapor leading spaces 295; 495; 2001 and outer walls 210; 410. The heat exchanging strip is designed such that flow channels are formed by internal surfaces of the strip, said flow channels connecting a heat carrier inlet and a heat carrier outlet. A coolant forms a falling film on external surfaces of the heat carrier channels by being provided above the heat carrier channels by a coolant inlet 240; 440 , wherein coolant being vaporized from the external surfaces by heat from a heat carrier flowing from the inlet to the outlet rapidly enters the vapor leading spaces 295; 495; 2001. The vapor leading spaces 295; 495; 2001 are provided between the heat exchanging strip 300; 500; 700; 2002 and the outer walls 210; 410.