结合双效吸收式热泵的新型海水淡化系统

A NEW SEAWATER DESALINATION SYSTEM COMBINED WITH DOUBLE-EFFECT ABSORPTION HEAT PUMP

本文提出低温多效海水淡化与双效并联溴化锂吸收式热泵有机结合的新系统(LT-MED-AHP),阐述系统集成构思与特点,模拟分析系统性能特性,同时利用EUD分析方法揭示出关键过程中的节能机理.高温蒸汽输入热泵子系统,提升了海水淡化子系统末效产生蒸汽的品位,研究表明,新系统生产单位淡水的能耗比传统的蒸汽喷射器集成方式(LT-MED-TVC)降低了35.6%。本文工作为低温多效海水淡化装置的进一步节能降耗提供了新途径.

A new seawater desalination system, which integrates a low temperature multi-effect desalination system （LT-MED） and a double-effect parallel LiBr-water absorption heat pump（AHP）, is proposed. The conceptive design of the system is introduced and the system performance is investigated in this paper. Based on the EUD analysis, the cascade utilization of thermal energy in the new system is disclosed. The high-temperature thermal energy input the system is used to upgrade the energy level of the low-temperature vapor generated form the last effect of LT-MED by the heat pump in the new system. The energy consumption of unit fresh water production is decreased by 35.6% compared with the traditional system with a thermal vapor compression （LT-MED-TVC）. The results obtained here provide a new approach to decrease the energy consumption of sea water desalination.