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Unformatted text preview: act , out in & &= To perform a calculation for a real work control volume device with a specified isentropic efficiency, the following steps can be taken. 1. Perform an ideal device calculation, i.e. assuming s in = s out , to obtain W ideal . 2. Using the definition of s , calculate the actual work or power from turbine a for W W ideal s act & & = compressor or fan, pump, a for W W s ideal act & & = 3. The actual exit enthalpy can then be calculated form the first law, m Wh h act in act out, & & = 4. With the actual exit enthalpy and pressure known the actual exit state is fixed and the remaining properties can be obtained in the typical manner....
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 Spring '06
 SOMERTON
 Pumps

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