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Hybridization of a triple-effect absorption heat pump with a humidification-dehumidification desalination unit: Thermodynamic and economic investigation
Energy Conversion and Management ( IF 10.4 ) Pub Date : 2021-02-22 , DOI: 10.1016/j.enconman.2021.113879
Muhammad H. Elbassoussi , M.A. Antar , Syed M. Zubair

In this study, a novel hybrid desalination/cooling system is investigated. The system combines a triple-effect absorption (TEAB) heat pump (whose working fluid is LiBr/water solution) and a water-heated humidification dehumidification (HDH) desalination unit. The system is investigated for simultaneous production of freshwater and cooling effect. A low-grade energy source (natural gas) is utilized to operate the system, while solar PV panels are used to power the auxiliary components of the system, such as pumps and blowers. A detailed mathematical model is established to explore the influence of different parameters on the thermodynamic and economic performance of the system. From the HDH unit’s side, it is observed that the effectiveness of the HDH components (dehumidifier and humidifier), the mass flow rate ratio, and the inlet conditions of the saline water have a considerable impact on the system performance. On the other hand, from the TEAB system’s side, the performance of the hybrid system is found to be significantly affected by the effectiveness of both the solution heat exchangers and the absorber. The results reveal that the system can produce, at its optimal operating conditions, 10 kg of fresh water per hour for 0.85 ȼ/l with a gained-output-ratio (GOR) value approaching 5.0. Additionally, the system can produce a cooling capacity of about 2.0 kW at a coefficient of performance (COP) value close to 1.5. Furthermore, the proposed TEAB-HDH system shows comparable performance to other heat-pump-powered HDH systems available in the literature.



中文翻译:

三效吸收式热泵与加湿-除湿脱盐装置的混合:热力学和经济研究

在这项研究中,研究了一种新型的混合淡化/冷却系统。该系统结合了三效吸收(TEAB)热泵(其工作流体为LiBr /水溶液)和水加热加湿除湿(HDH)脱盐装置。为了同时生产淡水和冷却效果,对该系统进行了研究。低级能源(天然气)用于操作系统,而太阳能PV板用于为系统的辅助组件(如泵和鼓风机)供电。建立了详细的数学模型,以探索不同参数对系统热力学和经济性能的影响。从HDH装置的侧面观察到,HDH组件(除湿机和加湿器)的效率,质量流量比,盐水的入口条件对系统性能有很大影响。另一方面,从TEAB系统的角度来看,发现溶液热交换器和吸收器的效率都大大影响了混合系统的性能。结果表明,该系统在最佳运行条件下,每小时可生产10千克淡水,流量为0.85升/升,获得的产出比(GOR)接近5.0。另外,该系统可以在性能系数(COP)值接近1.5时产生约2.0 kW的冷却能力。此外,提出的TEAB-HDH系统显示出与文献中可用的其他热泵供电HDH系统相当的性能。从TEAB系统的角度来看,混合系统的性能受溶液热交换器和吸收器效率的显着影响。结果表明,该系统在最佳运行条件下,每小时可生产10千克淡水,流量为0.85升/升,获得的产出比(GOR)接近5.0。另外,该系统可以在性能系数(COP)值接近1.5时产生约2.0 kW的冷却能力。此外,提出的TEAB-HDH系统显示出与文献中可用的其他热泵供电HDH系统相当的性能。从TEAB系统的角度来看,混合系统的性能受溶液热交换器和吸收器效率的显着影响。结果表明,该系统在最佳运行条件下,每小时可生产10千克淡水,流量为0.85升/升,获得的产出比(GOR)接近5.0。另外,该系统可以在性能系数(COP)值接近1.5时产生约2.0 kW的冷却能力。此外,提出的TEAB-HDH系统显示出与文献中可用的其他热泵供电HDH系统相当的性能。在最佳运行条件下,每小时可产生10千克淡水,流量为0.85升/升,总产出比(GOR)接近5.0。此外,该系统可以在性能系数(COP)值接近1.5时产生约2.0 kW的冷却能力。此外,提出的TEAB-HDH系统显示出与文献中可用的其他热泵供电HDH系统相当的性能。在最佳运行条件下,每小时可产生105千克淡水,流量为0.85升/升,其产出比(GOR)接近5.0。此外,该系统可以在性能系数(COP)值接近1.5时产生约2.0 kW的冷却能力。此外,提出的TEAB-HDH系统显示出与文献中可用的其他热泵供电HDH系统相当的性能。

更新日期:2021-02-23
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