Minimum cost heat exchanger network

Pehler, F. A. and Liu, Y. A., "Thermodynamic Availability Analysis in the Synthesis of Energy-Optimum and Minimum-Cost Heat Exchanger Networks," AIChE National Meeting, Detroit, MI, Aug. (1981). 

Given the information provided by the stream data (see also section 8.2), determine the minimum total annualized cost heat exchanger network by providing ... 

FIgur 7.4 If film transfer coefficients difier significantly, then nonvertical h t transfer is necessary to achieve the minimum area. (Reprinted from Linnhoff and Ahmad, Cost Optimum Heat Exchanger Networks I. Minimum Energy and Capital Using Simple Models for Capital Cost," Computers Chem. Engg., 7 729, 1990 with permission from Elsevier Science, Ltd.)... 

The overall inventory. In the preceding chapter, the optimization of reactor conversion was considered. As the conversion increased, the size (and cost) of the reactor increased, but that of separation, recycle, and heat exchanger network systems decreased. The same also tends to occur with the inventory of material in these systems. The inventory in the reactor increases with increasing conversion, but the inventory in the other systems decreases. Thus, in some processes, it is possible to optimize for minimum overall inventory. In the same way as reactor conversion can be varied to minimize the overall inventory, the recycle inert concentration also can be varied. 

Figure 17.9 shows a heat exchanger network designed with the minimum number of units and to satisfy the energy target at ATmi = 20°C. On the basis of the following utilities and cost data, it has a total annual cost of 14.835 x 106 ( -y 1). 

Linnhoff B and Ahmad S (1990) Cost Optimum Heat Exchanger Networks - 1. Minimum Energy and Capital Using Simple Models for Capital Cost, Comp Chem Eng, 14 729. 

This chapter focuses on heat exchanger network synthesis approaches based on optimization methods. Sections 8.1 and 8.2 provide the motivation and problem definition of the HEN synthesis problem. Section 8.3 discusses the targets of minimum utility cost and minimum number of matches. Section 8.4 presents synthesis approaches based on decomposition, while section 8.5 discusses simultaneous approaches. 

Given a HRAT, determine the minimum utility cost of a heat exchanger network without prior knowledge of the HEN configuration. 

List all the costs that are affected by changing the minimum tenperature approach in a heat-exchanger network (HEN) design. 

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