The efficiency of the vane blower is (where W₁ = Workdone due to compression, and W₂ = Workdone due to back flow)?

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  1. W₁/(W₁ + W₂)
  2. W₂/(W₁ + W₂)
  3. (W₁ + W₂)/W₁
  4. (W₁ + W₂)/W₂

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Answer: Option 2

The efficiency of the vane blower is W₂/(W₁ + W₂) where, W₁ = Workdone due to compression W₂ = Workdone due to back flow

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