Purifying drinkable water from salt water is a very energy intensive process. The least energy intensive process involve

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Purifying Drinkable Water From Salt Water Is A Very Energy Intensive Process The Least Energy Intensive Process Involve 1 (96.61 KiB) Viewed 51 times

Purifying drinkable water from salt water is a very energy intensive process. The least energy intensive process involves high pressure reverse osmosis facilities. A entrepreneur believes he has discovered a better way to do the purification. As a consulting engineer you are tasked with reviewing his idea. Sea water (3.5 wt% salt) will be concentrated to 15 wt% salt solution. The sea water will be at 40°C when it is fed continuously at 30 into a kg bubble column. Air at 40°C enters the column and leaves as saturated air at 22°C. The bubble column will operate under adiabatic conditions. The saturated air then enters a cooling unit where the air is cooled to 5°C and the condensed water is collected from the unit. a) Determine the relative humidity and absolute humidity of air entering and exiting the bubble column. b) Determine the rate at which water is removed from the sea water feed. c) Determine how many kg dry air needs to be fed per kg sea water d) Determine the corresponding volume of humid air entering the column per kg sea water. e) Determine the rate at which water is condensed in the cooling unit. f) Determine the amount of heat which much be removed from the cooling unit. g) How many hours will it take to collect 200 L of pure water?