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Unformatted text preview: = Then the ideal power is given by ( 29 kW 2784 270))(390.6 (23)(1.004 TT c m W in ideal , out P ideal = = = & & The actual power is calculated from W W ideal actual = & & which requires us to determine the efficiency. We will calculate the efficiency at P r of 3.5 and at 4 and then interpolate to obtain the efficiency at 3.64. At P r = 3.5, = 0.6475 At P r = 4, = 0.7456 Then interpolating, we find at P r = 3.64, = 0.675 Then kW 4124 675 . 2784 W actual = = & The actual exit temperature is calculated from the first law or K 448.6 70 2 ) (23)(1.004 4124 T c m W T in P out = + = + = & &...
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 Fall '07
 SOMERTON

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