ClueLuma

Mixed-air humidity ratio calculator

Mixed-air humidity ratio is calculated as (m1 × w1 + m2 × w2)/(m1+m2). Use the stated system boundary and matching input units.

Units
wmix=m1×w1+m2×w2m1+m2w_{\text{mix}} = \frac{m_{1} \times w_{1} + m_{2} \times w_{2}}{m_{1} + m_{2}}

Calculator

Enter the values you know and leave one box empty. Calculate finds the empty one, the result or any input.

lb/h
lb/lb
lb/h
lb/lb
lb/lb

Worked example

Given

  • m1m_{1} = 3,000 lb/h
  • w1w_{1} = 0.006 lb/lb
  • m2m_{2} = 1,000 lb/h
  • w2w_{2} = 0.018 lb/lb
wmix=3000×0.006+1000×0.0183000+1000=0.009w_{\text{mix}} = \frac{3000 \times 0.006 + 1000 \times 0.018}{3000 + 1000} = 0.009

Symbols and units

SymbolMeaningUnit
wmixw_{\text{mix}}mixed-air humidity ratiolb/lb
m1m_{1}first dry-air mass flowlb/h
w1w_{1}first humidity ratiolb/lb
m2m_{2}second dry-air mass flowlb/h
w2w_{2}second humidity ratiolb/lb

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Results are estimates for study and screening. Check the inputs, units and assumptions before you use them for design, billing or contract decisions.