一种新型塔式太阳能集热器驱动多载流子能源系统的提出与运行评价

IF 8.3 2区工程技术 Q1 CHEMISTRY, PHYSICAL

International Journal of Hydrogen Energy Pub Date : 2025-04-28 DOI:10.1016/j.ijhydene.2025.04.380

Abdul Khaliq

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引用次数: 0

摘要

本文提出了一种基于太阳能的多载流子能源系统，用于同时发电、冷却、制氢和淡水。该系统集成了太阳能发电塔集热器、蒸汽朗肯循环、聚合物电解质膜（PEM）电解槽、Kalina循环、喷射式制冷循环（ERC）和反渗透（RO）装置。蒸汽冷凝器排出的热量被用来驱动与喷射器集成的Kalina循环。RO装置生产淡水，电解槽产生氢气，ERC提供冷却。应用稳态能量和火用分析得到的结果对定日器-朗肯发动机、PEM电解槽和ro系统的火用效率进行了验证。研究了与中央接收器中各种传热过程相关的火用，以揭示太阳能-热转换过程中不可逆性的作用。研究了不同系统的关键操作变量对子系统和综合系统的火用效率等结果的影响，以及对产氢和产淡水质量流量的影响。结果表明，在800 W/m2时，发电量为545 kW，冷却输出为238.4 kW，氢气产出率为3.84 kg/s，淡水产出率为3.69 kg/s。当太阳辐照度从600W/m2增加到1000W/m2时，淡水和氢气的产出率分别从1.5 ~ 5.5 kg/s和2.2 ~ 4.6 kg/s显著提高。当死态温度从15℃提高到40℃时，冷却用能效率从18.4%提高到54.6%，整个系统用能效率从2.9%提高到8.3%，而电解槽的效率几乎没有提高。中央接收器和定日镜报告最高的能量损耗（35.3%），其中大部分供应的太阳能被耗散。目前的研究结果为可持续地满足能源和淡水需求而设计的多发电机组的热力学性能提供了重要的推论。

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Proposal and exergetic-evaluation of a new tower solar collector-driven multi-carrier energy system

This paper proposes a solar-based multi-carrier energy system for simultaneous generation of electricity, cooling, hydrogen production, and fresh water. The system integrates solar power tower collector, steam Rankine cycle, polymer electrolyte membrane (PEM) electrolyzer, Kalina cycle, ejector refrigeration cycle (ERC), and reverse osmosis (RO) unit. The heat discarded from steam condenser is utilized to drive the Kalina cycle integrated to ejector. The RO unit produces fresh water, the electrolyzer generates hydrogen, and the ERC supplies cooling. The results obtained after applying the steady-state energy and exergy analysis are validated for the exergetic efficiency of heliostat-Rankine engine, PEM electrolyzer, and the RO-system. The exergy associated with various processes of heat transfer in the central receiver is examined to reveal the role of irreversibility during solar-to-heat conversion. Impact of varying the system's key operating variables on outcomes like exergetic efficiency of sub-systems and the integrated system as well as on mass flow rate of hydrogen generated and fresh water produced is investigated. The findings reveal an electricity generation of 545 kW, a cooling output of 238.4 kW, a hydrogen production rate of 3.84 kg/s, and fresh water production rate of 3.69 kg/s at 800 W/m². An increase in solar irradiance from 600W/m² to 1000W/m² significantly enhance the production rates of fresh water and hydrogen from 1.5 to 5.5 kg/s and 2.2–4.6 kg/s, respectively. A significant improvement in cooling exergy efficiency from 18.4 % to 54.6 % and in the exergetic efficiency of overall system from 2.9 % to 8.3 % is observed when dead state temperature is promoted from 15 °C to 40 °C whereas the electrolyzer shows little improvement in its efficiency. Central receiver and heliostat report the highest exergy destruction (35.3 %) where majority of supplied solar exergy is dissipated. The results obtained from current investigation reveal important inferences regarding the thermodynamic performance of multigeneration devised for meeting the needs of energy and fresh water in a sustainable fashion.

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来源期刊

International Journal of Hydrogen Energy 工程技术-环境科学

CiteScore

13.50

自引率

25.00%

发文量

3502

审稿时长

60 days

期刊介绍： The objective of the International Journal of Hydrogen Energy is to facilitate the exchange of new ideas, technological advancements, and research findings in the field of Hydrogen Energy among scientists and engineers worldwide. This journal showcases original research, both analytical and experimental, covering various aspects of Hydrogen Energy. These include production, storage, transmission, utilization, enabling technologies, environmental impact, economic considerations, and global perspectives on hydrogen and its carriers such as NH3, CH4, alcohols, etc. The utilization aspect encompasses various methods such as thermochemical (combustion), photochemical, electrochemical (fuel cells), and nuclear conversion of hydrogen, hydrogen isotopes, and hydrogen carriers into thermal, mechanical, and electrical energies. The applications of these energies can be found in transportation (including aerospace), industrial, commercial, and residential sectors.