THE SIMPLE (BUT WASTEFUL SOLUTION The simplest solution is 1 to cool each hot stream to its specified temperature using a cold utility such as cooling tower water and 2 to heat each cold stream to its specified temperature using a hot utility such as steam. Typical utility costs(see Turton et alare MP Steam(10 barg, 1840)....$3. 66/gJ Cw(15 C temperature rise). S0.24 gJ ooling cos;:(7.270(6800024)=Sl4,000yr Heating cost:(6.574)(8000(3.66=S192,000yr 2/21/99 HENS 1: Targeting2/21/99 HENS 1: Targeting 10 THE SIMPLE (BUT WASTEFUL) SOLUTION The simplest solution is: 1) to cool each hot stream to its specified temperature using a cold utility such as cooling tower water and 2) to heat each cold stream to its specified temperature using a hot utility such as steam. Typical utility costs (see Turton et al) are: MP Steam (10 barg, 184C)….$3.66/gJ CW (15 C temperature rise) .. $0.24/gJ Cooling cost: (7.270)(8000)(0.24) = $14,000/yr Heating cost: (6.574)(8000)(3.66) = $192,000/yr