Evaporation of Liquid Particles in Two -Phase Compression Process

The change in water particle diameters injected into the vapor compression process, the water phase temperature and the vapor phase temperature were measured in the compression process. The experimental conditions were approx. 2 at a compression ratio under 100 kPa in pressure, 340-390 Kin temperature range, 2-8 Hz in rotational speed. The mass ratio of injected water was small: in the order of 1% of the vapor phase mass. The temperature of water particles was clarified as being the same as the saturation temperature for the measured pressures. The temperature difference between two phases was in the order of 10 K under the test conditions. Water particles with diameters of some ten micrometers were sufficiently evaporated in the compression cycle. Injection timing difference was clearly apparent in the temperature-entropy diagram at the rotational speed of 2 Hz, even for very small injepion mass ratio.