The optimization of heat exchanger networks(HEN)is a typical MINLP problem.For large-scale HEN,when the number of process streams increases,its feasible configurations could increase exponentially.Till now,no effectiv...The optimization of heat exchanger networks(HEN)is a typical MINLP problem.For large-scale HEN,when the number of process streams increases,its feasible configurations could increase exponentially.Till now,no effective methods are available to solve such problems.A new strategy based on the optimization of the sub-networks of HEN was proposed.According to the first optimization,the sub-networks underwent recombination,decomposition and transplantation operations were further optimized with the hybrid genetic algorithm.Evolution of the sub-networks instead of the optimization of the whole HEN was simple and fast.A large-scale HEN with 22 hot and 17 cold streams from literature was calculated with this new method and a better result was obtained.Although the exchanger area increased a little,the number of heat exchanger units was less,also utility and total annual cost decreased.展开更多
针对RWCE（random walk algorithm with compulsive evolution，RWCE）算法优化有分流换热网络时，由于变量维数过多造成的算法全局搜索能力下降问题，提出了一种主辅强制进化随机游走算法（master-salve random walk algorithm with co...针对RWCE（random walk algorithm with compulsive evolution，RWCE）算法优化有分流换热网络时，由于变量维数过多造成的算法全局搜索能力下降问题，提出了一种主辅强制进化随机游走算法（master-salve random walk algorithm with compulsive evolution，MS—RWCE）。算法通过将换热量和分流比的优化分开处理，建立一种以换热量优化为主导、分流比优化为辅从的新的进化机制。同时，为了进一步保证换热量优化的主导地位，引入分流比隔代优化策略，减少换热量和分流比在优化中的相互制约。采用9SP和15SP算例对MS-RWCE算法的有效性进行验证，MS-RWCE算法优化9SP和15SP算例，较采用RWCE算法的年综合费用分别下降了4395和18 420$/a，证明MS-RWCE算法可以实现换热网络优化质量的提升。展开更多
文摘The optimization of heat exchanger networks(HEN)is a typical MINLP problem.For large-scale HEN,when the number of process streams increases,its feasible configurations could increase exponentially.Till now,no effective methods are available to solve such problems.A new strategy based on the optimization of the sub-networks of HEN was proposed.According to the first optimization,the sub-networks underwent recombination,decomposition and transplantation operations were further optimized with the hybrid genetic algorithm.Evolution of the sub-networks instead of the optimization of the whole HEN was simple and fast.A large-scale HEN with 22 hot and 17 cold streams from literature was calculated with this new method and a better result was obtained.Although the exchanger area increased a little,the number of heat exchanger units was less,also utility and total annual cost decreased.
文摘针对RWCE（random walk algorithm with compulsive evolution，RWCE）算法优化有分流换热网络时，由于变量维数过多造成的算法全局搜索能力下降问题，提出了一种主辅强制进化随机游走算法（master-salve random walk algorithm with compulsive evolution，MS—RWCE）。算法通过将换热量和分流比的优化分开处理，建立一种以换热量优化为主导、分流比优化为辅从的新的进化机制。同时，为了进一步保证换热量优化的主导地位，引入分流比隔代优化策略，减少换热量和分流比在优化中的相互制约。采用9SP和15SP算例对MS-RWCE算法的有效性进行验证，MS-RWCE算法优化9SP和15SP算例，较采用RWCE算法的年综合费用分别下降了4395和18 420$/a，证明MS-RWCE算法可以实现换热网络优化质量的提升。
