Thermodynamic problem. I am using the book of Cengel, Y.A., and Boles, M.A. (2008). Thermodynamics: An Engineering Approach. 6th ed. McGraw Hill. Chapter 11. Use the psychrometric chart as a tool to determine the properties of atmospheric air.

Transcribed Image Text:

2 75 F, = 50 65 F, ø=30 5 3 Room to be conditioned. 1 90 F, e=90 Air conditioning machine 2- An engineer doing an audit finds that liquid water from a process enters the cooling tower at 80 F and with a volume flow of 25 gpm and exits at 70 F. Air enters the tower at 80 F and relative humidity of 70%. Air exits the tower at 90 F and 90% relative humidity. The tower does not use make up water. Determine: a. The air inlet and outlet conditions in the table. Condition Tdb W (Ib water/lb air) H V ft3/lb) (F) (Btu/lb) Inlet (Air) 80 70 Output (Air) 90 90 b. Required air flow (cfm). c. Amount of water at the outlet (not equal to the inlet) (gpm). d. Heat removed to water. 2 75 F, = 50 65 F, ø=30 5 3 Room to be conditioned. 1 90 F, e=90 Air conditioning machine 2- An engineer doing an audit finds that liquid water from a process enters the cooling tower at 80 F and with a volume flow of 25 gpm and exits at 70 F. Air enters the tower at 80 F and relative humidity of 70%. Air exits the tower at 90 F and 90% relative humidity. The tower does not use make up water. Determine: a. The air inlet and outlet conditions in the table. Condition Tdb W (Ib water/lb air) H V ft3/lb) (F) (Btu/lb) Inlet (Air) 80 70 Output (Air) 90 90 b. Required air flow (cfm). c. Amount of water at the outlet (not equal to the inlet) (gpm). d. Heat removed to water.