基于遗传算法的有机朗肯循环系统换热器设计优化

Design Optimization of Heat Exchanger in Organic Rankine Cycle System Based on Genetic Algorithm

利用有机朗肯循环系统(ORC)发电是低品味热能利用领域的关键技术,对ORC系统换热设备进行优化设计,有助于提高ORC系统经济性。本文针对ORC系统典型换热设备预热器、蒸发器和冷凝器,建立换热器设计计算模型,选择换热器结构设计参数作为优化变量,采用遗传算法进行优化求解。优化结果表明,在保证系统效率的前提下,换热器换热面积减少16.21%。该方法为换热器优化设计提供新的思路。

Using Organic Rankine Circle(ORC) to generate electricity is a key technology in the field of low-grade heat energy utilization. Optimal design of heat exchange equipment in ORC system is helpful to improve the economy of ORC system. In this paper, aiming at the preheater, Evaporator and condenser of typical heat exchange equipment in ORC system, the design calculation model of heat exchanger is established, the structural design parameters of heat exchanger are selected as optimization variables, and genetic algorithm(GA) is used for optimization solution. The optimization results show that the heat exchange area of the heat exchanger is reduced by 16.21% on the premise of ensuring the system efficiency. This method provides a new method for the optimal design of heat exchangers.