How to Calculate Moist Air Dehumidification and Cooling Rates?

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SUMMARY

The discussion focuses on calculating the dehumidification and cooling rates of moist air entering a dehumidifier. The specific conditions include moist air at 40°C and 90% relative humidity, with a flow rate of 300 m³/min and a constant pressure of 100 kPa. The results indicate a mass flow rate of dry air at 311.61 kg/min, a water removal rate of 11.40 kg/min, and a required refrigeration capacity of -181.91 tons. These calculations are essential for understanding the performance of dehumidification systems.

PREREQUISITES
  • Understanding of psychrometrics and moisture content calculations
  • Familiarity with dehumidification processes and equipment
  • Knowledge of thermodynamic principles related to air conditioning
  • Ability to perform calculations involving mass flow rates and refrigeration capacity
NEXT STEPS
  • Study psychrometric charts and their applications in HVAC systems
  • Learn about the principles of dehumidification and cooling load calculations
  • Explore refrigeration cycle fundamentals and capacity calculations
  • Investigate software tools for HVAC design and analysis, such as Trane Trace 700
USEFUL FOR

This discussion is beneficial for HVAC engineers, mechanical engineers, and students studying thermodynamics or HVAC design, particularly those involved in dehumidification system design and analysis.

darkmagic
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Homework Statement



Moist air at 40 C and 90% R.H. enters a dehumidifyer at the rate of 300 m3/min. The condensate and the saturated air exit at 10oC through separate exits. The pressure remains constant at 100 kPa. Determine (a) the mass flow rate of dry air, (b) the water removal rate, and (c) the required refrigeration capacity in tons.

Answers: (a) 311.61 kg/min, (b) 11.40 kg/min, (c) -181.91 tons

I tried everything I know in my scratch but this topic does not teach by my professor. I read some books and research. However, I still do not get the answer. Just explain to me how to solve this kind of problems
 
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