At Shail Vac, we take a stand to enhance our customers' satisfaction, which allows us to improve continuously to meet our customers’ most challenging application needs. Shail Vac’s Customer First Commitment drives our every project. From inception to completion, our sales staff works closely with our customers to provide expertise and thorough insight to ensure complete project success.
Steam Jet Refrigeration works on the principle of liquids flashing under vacuum in a chamber. Steam is passed through a vacuum ejector to create the designed vacuum in the closed and separated vessel.The boiling point of the liquids comes down drastically in presence of vacuum.
For each given pressure, water has a corresponding boiling point or temperature of vaporization. For instance, at 114.7 psia pressure, water will vaporize at 170 °C. At atmospheric pressure i.e. at 14.7 psia, water will vaporize at 100 °C and when contained in a vessel and subjected to a vacuum of 0.1475 psia (7.6 Torr), water will vaporize at 7.2 °C.
Hence, the steam vacuum refrigeration unit produces a pre-determined vacuum that corresponds to the chilled water temperature required, and thus flashes off water vapour until the balance of the water that does not flash is chilled to this required temperature.
Each pound of water that changes its state and flashes into a vapour takes with it heat approximately equal to 1068 btu. Therefore, if we flash off 11.25 lbs/hr of water, we have extracted 12,000 btu/hr, or one ton of refrigeration. |