干旱区生态环境知识资源中心(Arid): Thermodynamic analysis and optimization of adsorption-based atmospheric water harvesting

Arid

DOI	10.1016/j.ijheatmasstransfer.2020.120253
	Thermodynamic analysis and optimization of adsorption-based atmospheric water harvesting
	Kim, Hyunho; Rao, Sameer R.; LaPotin, Mina; Lee, Seockheon; Wang, Evelyn N.
通讯作者	Kim, H
来源期刊	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
ISSN	0017-9310
EISSN	1879-2189
出版年	2020
卷号	161
英文摘要	Adsorption-based atmospheric water harvesting (AWH) technologies can enable decentralized and distributed water supplies in arid and water scarce regions with limited infrastructure. Recent advances in novel adsorbents, such as metal-organic frameworks (MOFs) and advanced zeolites, with high sorption capacity at low humidity and facile regeneration, promise the development of efficient AWH technologies. However, a comprehensive thermodynamic analysis based on fundamental material properties to predict optimal operating parameters and system-level efficiency has not been pursued. In this work, we present a generalized theoretical framework to optimize the energetic performance of thermally-driven adsorption-based AWH systems using fundamental material properties, such as adsorption isotherms. Using example characteristics of recently reported MOFs (MOF-801, MOF-303, and Ni2Cl2 BTDD) with step-wise adsorption isotherms, we present AWH system-level theoretical efficiencies of each MOF based on the First and Second Law of Thermodynamics. We show the impact of heat source temperature from realistically achievable low-grade heat sources (up to 100 degrees C) on the overall efficiency. We also present the concept of a cascaded system which operates two adsorbent beds in series, and by capturing the condensation heat of the first bed, an increase in the overall efficiency can be achieved. At ambient conditions with relative humidities (RHs) below 40%, which is typical of arid climates, we show theoretical thermal (thermal energy to water conversion) and Second Law efficiencies of 0.33 and 0.18 with MOF-801 and MOF-303, and 0.56 and 0.19 with Ni2Cl2 BTDD, respectively. For the cascaded system, a thermal efficiency of 0.7 and Second Law efficiency of 0.23 can be achieved with Ni2Cl2 BTDD, over an order of magnitude greater than state-of-the-art refrigeration systems. Our framework presented can identify optimal operating parameters, and enable system-level predictions using materials properties for AWH and other related applications, including thermal energy storage, dehumidification, and desalination. (C) 2020 Elsevier Ltd. All rights reserved.
英文关键词	Atmospheric water harvesting Adsorption Adsorbents Metal-organic frameworks (MOFs) Thermodynamic analysis
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000571813900061
WOS关键词	METAL-ORGANIC FRAMEWORKS ; ZEOLITES
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326438
作者单位	[Kim, Hyunho; Lee, Seockheon] Korea Inst Sci & Technol KIST, Natl Agenda Res Div, Water Cycle Res Ctr, Seoul 02792, South Korea; [Rao, Sameer R.] Univ Utah, Dept Mech Engn, Salt Lake City, UT 84112 USA; [LaPotin, Mina; Wang, Evelyn N.] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
推荐引用方式 GB/T 7714	Kim, Hyunho,Rao, Sameer R.,LaPotin, Mina,et al. Thermodynamic analysis and optimization of adsorption-based atmospheric water harvesting[J],2020,161.
APA	Kim, Hyunho,Rao, Sameer R.,LaPotin, Mina,Lee, Seockheon,&Wang, Evelyn N..(2020).Thermodynamic analysis and optimization of adsorption-based atmospheric water harvesting.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,161.
MLA	Kim, Hyunho,et al."Thermodynamic analysis and optimization of adsorption-based atmospheric water harvesting".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 161(2020).