环境条件对基于干燥剂轮的太阳能大气集水系统性能的影响:实验研究

IF 6.3 2区 材料科学 Q2 ENERGY & FUELS
Pravesh Kumar Kushwaha, Amit Kumar
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引用次数: 0

摘要

由于现有的淡水资源正在迅速枯竭,全世界都面临着严重的淡水危机。迫切需要探索一种新的、可持续的饮用水源,以满足当前的需求。太阳能大气集水(SP-AWH)是一种从环境空气中提取水蒸气作为饮用水的创新方法。现有文献中的 SP-AWH 系统大多基于干燥剂床& 和平板集热器。这些系统面临着干燥剂床吸附能力有限和平板集热器效率较低的问题。本系统使用干燥剂轮进行吸附,使用真空管太阳能空气加热器对干燥剂轮进行再生,使用空气-空气热交换器对水蒸气进行冷凝。在不同的环境和运行条件下,该系统每天连续运行七天。调查显示,环境空气中 DBT 的增加和湿度比的降低严重影响了 SP-AWH 系统的性能。在环境条件(即 36 °C 的 DBT 和 20 g/kgda 的湿度比)和运行条件(即 113 °C 的再生温度和 144 kg/h 的空气流速)下,该系统一天的产水量为 8.6 L。此外,将再生空气温度提高 10%,系统的日产水量达到 9.55 升。将工艺空气流量从 144 kg/h 提高到 180 kg/h,日产水量提高到 10.34 升,能效为 10.2%。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of ambient conditions on the performance of solar-powered atmospheric water harvesting system based on desiccant wheel: An experimental investigation
The whole world is facing a serious freshwater crisis as the existing sources are rapidly depleting. There is an urgent need to explore a new and sustainable source of potable water to meet the current demand. Solar-powered atmospheric water harvesting (SP-AWH) is an innovative approach to extract water vapor from ambient air as drinking water. Most of the SP-AWH system available in the literature are based on desiccant bed & flat plate collector. These systems are facing limited adsorption capacity of desiccant bed and lower efficiency of flat plate collectors. The present system uses a desiccant wheel for adsorption, an evacuated tube solar air heater for the regeneration of desiccant wheel, and an air-to-air heat exchanger for the condensation of water vapor. The system is operated daily for seven consecutive days under various ambient and operating conditions. The investigation shows that the increase in DBT of ambient air and decrease in humidity ratio severely affected the performance of the SP-AWH system. Under the ambient conditions (i.e. 36 °C DBT and 20 g/kgda humidity ratio) and operating condition (i.e.113 °C regeneration temperature and 144 kg/h air flow rate) this system achieved a water productivity of 8.6 L in a day. Further, by increasing the regeneration air temperature by 10 % the system's daily yield reaches 9.55 L in a day. Increasing the process air flow rate from 144 kg/h to 180 kg/h improved the water productivity to 10.34 L in a day with an energy efficiency of 10.2 %.
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来源期刊
Solar Energy Materials and Solar Cells
Solar Energy Materials and Solar Cells 工程技术-材料科学:综合
CiteScore
12.60
自引率
11.60%
发文量
513
审稿时长
47 days
期刊介绍: Solar Energy Materials & Solar Cells is intended as a vehicle for the dissemination of research results on materials science and technology related to photovoltaic, photothermal and photoelectrochemical solar energy conversion. Materials science is taken in the broadest possible sense and encompasses physics, chemistry, optics, materials fabrication and analysis for all types of materials.
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