基于Simulink的余热驱动冷-淡联产系统动态特性分析

Dynamic analysis of a combined cooling and pure water production system driven by waste heat based on Simulink

为了验证变工况下联产系统各输出参数的响应特点,提出了一种由柴油发电机余热驱动的双效溴化锂吸收式冷水机组及两效蒸馏式海水淡化装置组合的冷-淡联产系统,并建立了其物理模型与相应的控制方程。通过Simulink对该系统进行仿真,获得了不同工况下该系统的各项工作和性能参数,以及在变工况下各参数的动态响应特性,分析了该系统在余热工况场合的应用特点及可靠性。仿真结果表明:额定功率为200 kW的柴油发电组所提供的余热能制取210 kW以上的冷量以及0.12 kg/s的淡水;在电力负载以不同方式、不同程度进行衰减时,联产系统经过响应时间后,部分工作参数会发生改变,但依旧可以平稳运行。

In order to verify the response characteristics of output parameters under variable working conditions,a combined system of double effects lithium bromide absorption water chillers with two-effects distillation type pure water producer was proposed which were both driven by the diesel-generator group waste heat.Physical modeling was implemented of the combined system through Simulink.Dynamical response of each working parameters and performance features of the system had been obtained under various working conditions according to the simulation results of Simulink.The characteristics and reliability of the combined system were analyzed and evaluated in cases of applying waste heat as heat source.The simulation results show that waste heat provided by diesel-generator group with specified power of 200 kW is able to produce up to 210 kW cooling capacity and pure water production of 0.12 kg/s.Under various power load conditions,the combined system can still function stably after a period of response time despite partial changes of working parameter.