Examples

MoistAirTab™ Example 6 - Air Dehydration

Example 6

Ambient air at 85°F and 760 mm Hg and 55% relative humidity is compressed to 10 atm (gauge) to supply a requirement for 250 lb/hr of air (dry basis). The mixture is cooled in a condenser to remove 90% of the original moisture content. The air stream is further   dehydrated to -10°F dew point (at the line pressure) in a desiccant dryer. The pressure drop in condenser and desiccant dryer is 5 psi each. The isentropic efficiency of the air compressor is 85%.

1. To what temperature must the air stream be cooled in the condenser?
2. How much water needs to be removed in the desiccant dryer?

Solution

The solution is presented below as a table generated from Excel. The gray shaded areas represent the input data.