A Full-Solid-State Humidity Pump for Localized Humidity Control

Abstract

Traditional moisture removal technologies (for example, cooling condensation or desiccant dehumidification) come with inherent defects of energy efficiency and are too bulky and complex for small-space humidity-control applications. In this work, using the advantages of commercial thermoelectric coolers and solid desiccant materials, we fabricated a solid-state, scalable ''humidity pump'' that can efficiently transfer the moisture in air from the low-humidity space to the highhumidity space.

Metal- and halide-free, solid-state polymeric water vapor sorbents for efficient water-sorption-driven cooling and atmospheric water harvesting

“…6,9 The capture-release of water vapor has underpinned a number of emerging designs significant to the water-energy nexus, such as sorption-driven heat transformation for cooling and heating, [10][11][12][13][14] atmospheric water harvesting (AWH), [15][16][17][18][19][20][21][22][23][24][25][26][27][28] vapor-sorption-based desalination, 14,29 and air humidity regulation. 30,31 In particular, sorptiondriven cooling and AWH are gaining a lot of interest nowadays in both academia and industry as they aim at reducing electricity consumption, obsoleting the conventional harmful coolants (e.g., chlorodifluoromethane, 1,1,1,2-tetrafluoroethane), 32 and producing freshwater from an unconventional source (the atmosphere). In all of these applications, the water vapor sorbent is the most critical component.…”

Sorption-tree with scalable hygroscopic adsorbent-leaves for water harvesting

“…In addition, the IMFCA implements to adsorb enough moisture in 4-6 h, and desorb completely in 1 h. The desorption rate is $4 times that of the adsorption process, attributed to the high desorption potential. 31 In addition, the superior photothermal property of IMFCA compared with MFCA was veried in 1 kW m À1 of solar irradiation intensity. During the rst 10 minutes, the surface temperature of hydrated IMFCA rapidly rose from 26 C to 60 C, while that of MFCA went up from 26 C to 45 C. Then, the temperature of IMFCA commenced rising very slowly, while that of MFCA gradually tended to stabilize at 48 C, in which case the heat absorption, heat loss, and desorption heat reached equilibrium.…”

Digestion of Ambient Humidity for Energy Generation

“…By integrating with photothermal converter, HDF is possible to serve as an autonomous humidity pump for thermal comfort improvement. 10,12 In addition, it would be of particular significance to drive the on-skin electronics with HDF. The hydroelectric devices have made progress in mobile powering, and the moisture-driven battery is worth of further investigation.…”