Determining the sizes of heat exchangers which minimize the cost of a crude preheat train were investigated. SIMAN was used to simulate the system for different overdesign factors, and it was found out that the operating cost was minimized by maximiz ing the furnace coil outlet temperature.
An overdesign factor of 10% yielded the best results; this is less than the 25% normally used in practice. This suggests that time- dependent simulation can lead to tighter control of overdesign in the design of process equipment under risk and uncertainty conditions. Time-dependent simulations are rarely used in the chemical process industry.
Al-Zakri, A.S. and Bell, K.J. "Estimating Performance When Uncertainties Exist." Chemical Engineering Progress77:7 (1981), 39-49.
2.
Kern, D.Q.Process Heat Transfer. McGraw-Hill Book Co., New York, N.Y. (1975).
3.
Law, A. and Kelton, W.Simulation Modeling and Analysis. 1st ed. McGraw-Hill Book Co., New York, N.Y. ( 1982).
4.
Parkinson, A. ; Liebman, J.; Pederson, C.; and Templeman, A. "The Optimal Design of Resilient Heat Exchanger Networks." AlChE Symposium Series78:214 (1982), 85-98.
5.
Peg Den, C.D.Introduction to SIMANSystems Modeling Corp., State College, Pa. (1982).
6.
Peters, N.S. and Timmerhaus, K.D.Plant Design and Economics for Chemical Engineers . 3rd ed. McGraw-Hill Book Co ., New York, N.Y. (1980).
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Stoecker, W.F.Design of Thermal Systems. 2nd. ed. McGraw-Hill Book Co., New York, N.Y. (1980).
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Avriel, M. and Wilde, J. "Engineering Design Under Uncertainty." I&EC Process Des and Dev.8:1 (1969), 124.
