海水淡化与水源热泵联合系统性能与成本研究

提出了低温多效海水淡化装置与水源热泵联合系统技术,建立了联合系统数学模型,并利用MATLAB编制程序进行了求解,分析了末效二次蒸汽温度对联合系统热力性能与成本的影响,并且与低温多效海水淡化系统进行了成本比较。计算结果表明:在文章的计算范围内,随着末效二次蒸汽温度的升高,加热蒸汽量减少,蒸发器总传热面积增大,驱动蒸汽量减少,供热水量减少,综合效果是淡水成本增加。其他参数相同的情况下,与低温多效海水淡化系统相比,联合系统的淡水成本节省11.68%。

Performance and cost study on seawater desalination and water-source heat pump combined system

The low temperature multi-effect desalination(LT-MED) and water-source heat pump combined system was presented.The mathematical model for the combined system was established,and was solved by using MATLAB.The influence of secondary steam temperature in the last effect on the thermal performance and cost of the system was analyzed,and the cost of the combined system was compared with that of the LT-MED system.The results show that with the increase of secondary steam temperature in the last effect,the heating steam flow,motive steam flow and the heating water flow all decrease while the evaporator area increases,thus causing the cost increase of fresh water.Under the same condition,the fresh water cost of the combined system decreases by 11.68% compared with that of the LT-MED system.