Application of advanced thermodynamics, thermoeconomics and exergy costing to a Multiple Effect Distillation plant: In-depth analysis of cost formation process
Application of advanced thermodynamics, thermoeconomics and exergy costing to a Multiple Effect Distillation plant: In-depth analysis of cost formation process
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DOI：
10.1016/j.desal.2015.06.008
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发表时间：
2015-09-01
期刊：
影响因子：
9.9
通讯作者：
Piacentino, Antonio
中科院分区：
文献类型：
--
作者：
Piacentino, Antonio
每立方米淡水的高热能消耗是热驱动脱盐工艺推广的主要障碍之一，限制了其在化石燃料储量高的国家的应用，或限制了双用途热电联产厂和太阳能脱盐系统等特定技术解决方案的使用。由于能量转换效率是提高热驱动海水淡化厂性能的主要问题，热经济分析一直吸引着研究人员的努力，以确定工艺改进的边际。本文以工程方程求解器中建立的模型为基础，对8效正向进料多效精馏装置进行了严格的火用和热经济分析。创新的贡献在于详细的方法制定和对主要假设的解释性说明以及所使用的高度分解，这使我们能够遵循每个特定的子过程，从而获得对整个成本形成过程的深入了解。结果表明，与物理和化学能量流动相关的货币价值在整个工厂中变化很大，并且在最后的效果中产生的馏出物对淡水最终成本的贡献更高。(C) 2015 Elsevier B.V.版权所有
The high thermal energy consumption per m(3) fresh water is one of the main barriers to the spread of thermally driven desalination processes and has limited their use to applications in countries with high reserves of fossil fuels or to specific technological solutions like dual purpose cogeneration plants and solar desalination systems. Being energy conversion efficiency a major issue to improve the performance of thermally driven desalination plants, thermoeconomic analysis has been attracting the efforts of researchers for the identification of margins for process improvement. In this paper a rigorous exergy and thermoeconomic analysis is presented for an 8 effect forward feed Multiple Effect Distillation plant, based on models developed in Engineering Equation Solver. The innovative contribution lies in the detailed methodological formulation with explicative notes on the main assumptions and in the high level of disaggregation used, which allows us to follow each specific subprocess and thus to acquire an in-depth understanding of the whole cost formation process. The results indicate that the monetary value associated with the physical and chemical exergy flows highly vary throughout the plant and that the contribution to the final cost of fresh water is higher for the distillate produced in the last effects. (C) 2015 Elsevier B.V. All rights reserved.