A new combined power and desalination system driven by low grade heat for concentrated brine
A new combined power and desalination system driven by low grade heat for concentrated brine
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DOI：
10.1016/j.energy.2012.07.050
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发表时间：
2012-10
期刊：
影响因子：
9
通讯作者：
Chennan Li;D. Goswami;A. Shapiro;E. Stefanakos;Gokmen Demirkaya
中科院分区：
文献类型：
--
作者：
Chennan Li;D. Goswami;A. Shapiro;E. Stefanakos;Gokmen Demirkaya
提出了一种新的电力与海水淡化联合系统。该系统由低级热源驱动，例如太阳能、地热或废热。该系统结合了超临界有机朗肯循环（SORC），喷射器和多效蒸馏（MED）脱盐系统，可用于海水或浓缩盐水，如天然气开采过程中产生的压裂返排水。提出了一个理论模型，并根据文献中的实验结果进行了部分验证。建议的系统的热性能进行了分析，使用该模型和参数的灵敏度分析进行量化的性能，这种组合的电力和水系统。该组合系统在150 °C下使用低温热源，对于35 g/kg的盐浓度具有接近40%的总有效能效率。所提出的系统可以处理盐浓度高达55 g/kg的浓盐水，除了供应给动力循环的热量之外，不需要额外的能量输入。
A new combined power and desalination system is proposed. This system is driven by low grade heat sources such as solar energy, geothermal or waste heat. This system combines a supercritical organic Rankine cycle (SORC), an ejector and a multi-effect distillation (MED) desalination system, which could be used for seawater or concentrated brine such as frac flowback water produced during natural gas mining. A theoretical model is presented and partially validated based on experimental results from the literature. The thermal performance of the proposed system is analyzed using the model and a parametric sensitivity analysis is carried out to quantify the performance of this combined power and water system. The combined system has an overall exergy efficiency close to 40% for salt concentration of 35 g/kg using a low temperature heat source at 150 °C The proposed system could treat concentrated brine up to 55 g/kg salt concentration with no additional energy input except heat supplied to the power cycle.