Within an air-handling system, a stream of air at T=30°C and 91=40% relative humidity is being mixed with air at T2=5°C and 2-20% relative humidity in order to create an outlet stream of air at T3-20°C with an absolute humidity of @3=0.006708 kgH20/kgdry air. The whole duct system has an overall pressure of 102 kPa. What is the ratio of volumetric flow rate ratio between the warm and cold incoming air streams (V1/V2)? 1

Structural Analysis
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Within an air-handling system, a stream of air at T=30°C and 91=40% relative humidity is being mixed
with air at T2=5°C and 92=20% relative humidity in order to create an outlet stream of air at T3-20°C
with an absolute humidity of w3=0.006708 kg120/kgdry air. The whole duct system has an overall pressure
of 102 kPa. What is the ratio of volumetric flow rate ratio between the warm and cold incoming air
streams (V,/V2)?
1.
Mixing
3
section
2
Transcribed Image Text:Within an air-handling system, a stream of air at T=30°C and 91=40% relative humidity is being mixed with air at T2=5°C and 92=20% relative humidity in order to create an outlet stream of air at T3-20°C with an absolute humidity of w3=0.006708 kg120/kgdry air. The whole duct system has an overall pressure of 102 kPa. What is the ratio of volumetric flow rate ratio between the warm and cold incoming air streams (V,/V2)? 1. Mixing 3 section 2
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