TY - JOUR

T1 - Systematic screening of numerous salt hydrates for passive adsorptive PV cooling/water harvesting system

AU - Grekova, A.

AU - Cherpakova, A.

AU - Tokarev, M.

AU - Pan, Q.

AU - Ge, T.

AU - Gordeeva, L.

N1 - Systematic screening of numerous salt hydrates for passive adsorptive PV cooling/water harvesting system / A. Grekova, A. Cherpakova, M. Tokarev [et al.] // Energy. – 2026. – Vol. 347. – P. 140339. – DOI 10.1016/j.energy.2026.140339. – EDN FRJMCU. The work was supported by the Russian Science Foundation (project N◦ 25-43-00051) and the National Natural Science Foundation of China (project N◦ W2412067).

PY - 2026/3/15

Y1 - 2026/3/15

N2 - Photovoltaic (PV) technology is one of the most promising solutions to alleviate the energy crisis. Over 80% of solar energy dissipating as heat, negatively affects PV systems efficiency. Passive integrated adsorption system for PV Cooling and Atmospheric Water Harvesting (APVC/AWH) has recently been proposed to address this issue. An adsorbent on PV panel backside captures atmospheric moisture during night-time and release it during day-time by absorbing the PV panel waste heat, reducing its temperature and enhancing the efficiency. The desorbed moisture is collected producing freshwater. Effective implementation of the APVC/AWH system can only be solved through smart designing the adsorbent, whose properties are consistent with specific operating and climatic conditions (temperature, humidity) of region where the system is installed. Composite sorbents, based on hygroscopic Salts embedded into Porous Matrices (CSPMs) hold great promise for APVC/AWH due to a large adsorption capacity and tunability of the adsorption properties. The aim of this work is the systematic screening of numerous salt hydrates and selection the most promising ones for development of new CSPMs specialized for APVC/AWH. An approach to salt/hydrate selection for APVC/AWH is proposed, based on the calculation and analysis of standard enthalpy and entropy of the formation of numerous salt hydrates. Several salts (NiCl2, Na3PO4, Na2CO3, MgSO4) are selected for APVC/AWH in different climates. The CSPMs based on these salts are synthesized and tested to assess their potential for APVC/AWH. In a broader sense, the suggested approach to salt selection may be useful for the analysis of various adsorption applications.

AB - Photovoltaic (PV) technology is one of the most promising solutions to alleviate the energy crisis. Over 80% of solar energy dissipating as heat, negatively affects PV systems efficiency. Passive integrated adsorption system for PV Cooling and Atmospheric Water Harvesting (APVC/AWH) has recently been proposed to address this issue. An adsorbent on PV panel backside captures atmospheric moisture during night-time and release it during day-time by absorbing the PV panel waste heat, reducing its temperature and enhancing the efficiency. The desorbed moisture is collected producing freshwater. Effective implementation of the APVC/AWH system can only be solved through smart designing the adsorbent, whose properties are consistent with specific operating and climatic conditions (temperature, humidity) of region where the system is installed. Composite sorbents, based on hygroscopic Salts embedded into Porous Matrices (CSPMs) hold great promise for APVC/AWH due to a large adsorption capacity and tunability of the adsorption properties. The aim of this work is the systematic screening of numerous salt hydrates and selection the most promising ones for development of new CSPMs specialized for APVC/AWH. An approach to salt/hydrate selection for APVC/AWH is proposed, based on the calculation and analysis of standard enthalpy and entropy of the formation of numerous salt hydrates. Several salts (NiCl2, Na3PO4, Na2CO3, MgSO4) are selected for APVC/AWH in different climates. The CSPMs based on these salts are synthesized and tested to assess their potential for APVC/AWH. In a broader sense, the suggested approach to salt selection may be useful for the analysis of various adsorption applications.

KW - Adsorption/desorption PV cooling

KW - Composite sorbents

KW - Salt hydrates

KW - Water harvesting

KW - Адсорбционное/десорбционное охлаждение с использованием фотоэлектрических панелей

KW - Получение воды (из атмосферы)

KW - Гидраты солей

KW - Композитные сорбенты

UR - https://www.mendeley.com/catalogue/194856a6-6d15-370d-892c-0a31917c61f0/

UR - https://www.scopus.com/pages/publications/105034375125

UR - https://elibrary.ru/item.asp?id=91233616

U2 - 10.1016/j.energy.2026.140339

DO - 10.1016/j.energy.2026.140339

M3 - Article

VL - 347

JO - Energy

JF - Energy

SN - 0360-5442

M1 - 140339

ER -