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Energy and exergy analysis and optimum working conditions of a renewable energy system using a transient systems simulation program
Energy Exploration & Exploitation ( IF 2.7 ) Pub Date : 2020-03-02 , DOI: 10.1177/0144598720908071
Nidal H Abu-Hamdeh 1, 2 , Khalid A Alnefaie 2
Affiliation  

A solar tri-generation system comprises of photovoltaic thermal collectors that are used for the production of electrical power and domestic hot water simultaneously. This study presents the performance analysis of a micro-solar tri-generation system that fulfills the requirements of an off-grid single-family lodging. The main functions of this system include domestic hot water, electrical power, and cooling power production. A set of five photovoltaic thermal panels were modeled together. The electrical power generated was stored in a battery, while the hot water generated was passed through a flow diverting valve. This valve directed some of the hot water to an absorption chiller, while the remaining portion was sent to an insulated thermal storage tank for later use. Energy and exergy analyses were performed to evaluate the extracted energy’s quality and efficiency. The overall thermal energy efficiency achieved was 50.53%. The extracted energy in the form of hot water was 3777.5 W. The electrical power generated was 2984.6 W, which was sufficient for the small single-family lodging. The coefficient of performance of the absorption chiller was found to be 0.6152. The exergy efficiency achieved was 36.88%. The exergy extracted by hot water was 234.3 W, while the electrical exergy generated was 2984.6 W. The exergy extracted during refrigeration was found to be 91.22 W. Furthermore, varying wind speeds and tilt angles affected both the energy and exergy efficiencies. The tilt angle must be kept at less than 45°, and the optimum wind speed was determined to be 35 km/h.

中文翻译:

使用瞬态系统仿真程序的可再生能源系统的能量和火用分析及优化工作条件

太阳能三联产系统包括光伏集热器,用于同时生产电力和生活热水。本研究介绍了满足离网单户住宿要求的微型太阳能三联产系统的性能分析。该系统的主要功能包括生活热水、电力和冷却电力的生产。一组五个光伏热板被一起建模。产生的电能储存在电池中,而产生的热水则通过分流阀。这个阀门将一些热水导入吸收式制冷机,而剩余的部分则被送到一个隔热的储热罐以备后用。进行能量和火用分析以评估提取的能量的质量和效率。实现的整体热能效率为 50.53%。以热水形式提取的能量为 3777.5 W。产生的电力为 2984.6 W,足以满足小型独栋别墅的需求。发现吸收式制冷机的性能系数为 0.6152。实现的火用效率为36.88%。热水提取的火用为 234.3 W,而产生的电为 2984.6 W。制冷过程中提取的火用为 91.22 W。此外,不同的风速和倾斜角会影响能量和火用效率。倾斜角必须保持在 45°以内,最佳风速确定为 35 公里/小时。实现的整体热能效率为 50.53%。以热水形式提取的能量为 3777.5 W。产生的电力为 2984.6 W,足以满足小型独栋别墅的需求。发现吸收式制冷机的性能系数为 0.6152。实现的火用效率为36.88%。热水提取的火用为 234.3 W,而产生的电为 2984.6 W。制冷过程中提取的火用为 91.22 W。此外,不同的风速和倾斜角会影响能量和火用效率。倾斜角必须保持在 45°以内,最佳风速确定为 35 公里/小时。实现的整体热能效率为 50.53%。以热水形式提取的能量为 3777.5 W。产生的电力为 2984.6 W,足以满足小型独栋别墅的需求。发现吸收式制冷机的性能系数为 0.6152。达到的火用效率为36.88%。热水提取的火用为 234.3 W,而产生的电为 2984.6 W。制冷过程中提取的火用为 91.22 W。此外,不同的风速和倾斜角会影响能量和火用效率。倾斜角必须保持在 45°以内,最佳风速确定为 35 公里/小时。这对于小型独户住宿来说已经足够了。发现吸收式制冷机的性能系数为 0.6152。实现的火用效率为36.88%。热水提取的火用为 234.3 W,而产生的电为 2984.6 W。制冷过程中提取的火用为 91.22 W。此外,不同的风速和倾斜角会影响能量和火用效率。倾斜角必须保持在 45°以内,最佳风速确定为 35 公里/小时。这对于小型独户住宿来说已经足够了。发现吸收式制冷机的性能系数为 0.6152。达到的火用效率为36.88%。热水提取的火用为 234.3 W,而产生的电为 2984.6 W。制冷过程中提取的火用为 91.22 W。此外,不同的风速和倾斜角会影响能量和火用效率。倾斜角必须保持在 45°以内,最佳风速确定为 35 公里/小时。发现在制冷期间提取的火用能量为 91.22 W。此外,不同的风速和倾斜角会影响能量和火用效率。倾斜角必须保持在 45°以内,最佳风速确定为 35 公里/小时。发现在制冷期间提取的火用能量为 91.22 W。此外,不同的风速和倾斜角会影响能量和火用效率。倾斜角必须保持在 45°以内,最佳风速确定为 35 公里/小时。
更新日期:2020-03-02
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