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Thermo‐economic optimization and comparison study of LiBr‐H2O and LiCl‐H2O working pair in absorption cooling systems based on genetic algorithm
International Journal of Energy Research ( IF 4.3 ) Pub Date : 2020-11-12 , DOI: 10.1002/er.6048
Amit Bhowmick 1 , Balaram Kundu 1
Affiliation  

The major intention of this study is to reduce the total expenditure of a vapor absorption cooling system (VACS) by developing an optimization model with an alternative working pair LiCl‐H2O and compares it with the traditional LiBr‐H2O system. Considering the cooling capacity of 50 kW, two working pairs were to compare parametrically at various operating conditions. The model comprises of three parts, viz. a thermodynamic model for the estimation of coefficient of performance, exergetic efficiency, and availability destruction of system components; an economic model for computing expenditure flow rate and capital investing expenditure rate; and the minimization of the total expenditure using genetic algorithm. The parametric study suggests that a LiCl‐H2O system performs better from both thermodynamic and expenditure‐effective aspects under all working conditions involved in this study. Especially, a low generator temperature produces a noticeable difference. The present global optimization technique assesses the optimal operating temperatures of generator, absorber, condenser, and evaporator. An optimal operating condition provides a system with a 1.20% of decrement in total expenditure rate and 5.39% of reduction in total capital investing expenditure rate using LiCl‐H2O solutions with respect to LiBr‐H2O solutions. Finally, results derived from this study may assist to designers to choose an alternative working fluid for enhancing the performance of VACS.

中文翻译:

基于遗传算法的吸收式冷却系统LiBr‐H2O和LiCl‐H2O工作对的热经济优化和比较研究

这项研究的主要目的是通过开发具有替代工作对的LiCl-H 2 O并将其与传统的LiBr-H 2 O系统进行比较的优化模型来减少蒸气吸收式冷却系统(VACS)的总支出。考虑到50 kW的制冷能力,两个工作对将在各种运行条件下进行参数比较。该模型包括三个部分,即。一个热力学模型,用于估计系统组件的性能系数,能量效率和可用性破坏;计算支出流率和资本投资支出率的经济模型;并使用遗传算法将总支出降至最低。参数研究表明,LiCl-H 2在本研究涉及的所有工作条件下,O系统在热力学和节约成本方面均表现更好。特别是发电机温度低会产生明显的差异。当前的全局优化技术评估发电机,吸收器,冷凝器和蒸发器的最佳工作温度。相对于LiBr-H 2 O解决方案,使用LiCl-H 2 O解决方案,最佳操作条件可使系统的总支出率减少1.20%,总资本投资支出率减少5.39%。最后,这项研究得出的结果可能有助于设计人员选择一种替代的工作液,以增强VACS的性能。
更新日期:2020-11-12
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