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High pressure steam is supplied to the steam ejector from the boiler and it is expanded. Here, the water vapor originated from the flash chamber is entrained with the high velocity steam jet and it is further compressed in the thermo compressor. In the steam jet refrigeration system, the pressure inside the chill tank compartments will be reduced by a series of steam jet boosters, to a pressure corresponding to the saturation temperature of the chilled water required and steam jet boosters are sized accordingly to remove the calculated amount of water vapour evaporated for the required tonnage of refrigeration. The booster compresses the vapour by the help of a motivating steam to the desired discharge pressure, where it can be easily condensed in the direct contact type condenser with 32 °C cooling water. The non-condensable gases dissolved in the chilled water and system air leakages, are handled by the vent group ejectors. The condensate is usually returned to the boiler. Generally, 1% evaporation of water in the flash chamber is sufficient to decrease the temperature of chilled water to 60°C. The chilled water in the flash chamber is circulated by a pump to the point of application. The warm water from the load is returned to the flash chamber. The water is sprayed through the nozzles to provide maximum surface area for cooling.
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