COMPUTER-AIDED OPTIMAL DESIGN OF ENERGY RECOVERY SYSTEMS
Abstract
A design synthesis procedure is developed for the preliminary design of an integrated energy recovery and plant utility systems. Both conventional heat exchanger network problem and power driver allocation problem are incorporated into the design algorithm. Given known energy sources (waste heat streams and auxiliary boilers) and energy sinks (heating, process injection and driver horsepower needs), the algorithm determines the optimal header pressure levels, the heat exchanger and steam turbines network, and the steam flows between all devices so as to maximize the total energy recovered from the heat sources. The design concept of the steam network is to minimize the available energy loss by using a dynamic programming algorithm. For the driver allocation subproblem, a non-linear model and solution methods are presented. The results show that the synthesis procedure effectively performs both structural and parameter optimizations of this integrated energy system. The solution consists of the configuration information, operating condition, and the associated energy cost. The Mixed Integer Programming (MIP) algorithm which solves the shaft work problem was proven to be very reliable. Comparisons of various design parameters are also presented in this study.
Degree
Ph.D.
Subject Area
Chemical engineering
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