Atmospheric water harvesting by using evacuated tube collector: An experimental investigation

Agrawal, Anshu; Kumar, Amit; Parekh, A. D.

doi:10.1016/j.applthermaleng.2023.121087

Cited by 6 publications

(1 citation statement)

References 21 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The energy requirements associated with alternative AWH emphasize the challenges associated with the water-energy nexus and, thereby, the need for renewable energy sources such as solar thermal energy and waste heat. The latter emerge as ideal candidates to fulfill sustainably, with a low-cost source, power demands for AWH. ,− Developing a sorbent that combines low regeneration temperatures with high hygroscopicity remains a considerable materials science challenge. However, most of the research explores their potentialities, considering mainly two approaches for sorbent regeneration: (i) direct absorption of solar energy and (ii) heating the air to dry the sorbent (isoenthalpic regeneration , ).…”

Section: Introductionmentioning

confidence: 99%

Alginate Biopolymeric Coated Heat Exchanger for Atmospheric Water Harvesting

Gentile,

Bozlar,

Calò

et al. 2024

ACS EST Water

View full text Add to dashboard Cite

We present a new type of sorbent material involving an aluminum heat exchanger coated with a hydrophilic alginate biopolymer hydrogel for atmospheric water harvesting (AWH). The hydrogel-coated heat exchanger is tested in a prototype driving cycle, collecting water over several days of continuous operation. The thermal cycle performance of the coating is tested in dry climates with relative humidity in the range of 30−50%. The new sorbent demonstrates regeneration temperatures between 60 and 80 °C, allowing efficient thermal cycles. The system allowed for a water yield of 2.48−3.3 L/kg Hydrogel /day. The compactness of the coated heat exchanger, together with the performed daily water productivity, makes it compatible with applications integrating AWH technologies in the building sector.

show abstract

Section: Introductionmentioning

confidence: 99%

Alginate Biopolymeric Coated Heat Exchanger for Atmospheric Water Harvesting

Gentile,

Bozlar,

Calò

et al. 2024

ACS EST Water

View full text Add to dashboard Cite

show abstract

Experimental comparison of solar‐powered adsorption‐based atmospheric water harvesting using air‐to‐air & water‐to‐air heat exchanger for condensation

Agrawal,

Kumar

2024

Env Prog and Sustain Energy

View full text Add to dashboard Cite

Adsorption‐focused technologies for atmospheric water harvesting is of great importance. Most of the available systems in the literature use glass as a condenser, which gets heated up. This restricts vapor condensation to harvest less water and hampers the system's scalability. The effectiveness of the proposed solar atmospheric water harvesting system, which uses an air‐to‐air fin‐tube heat exchanger to condense the vapors, is experimentally evaluated in this work. In order to assess the system's effectiveness using a water‐to‐air fin‐tube heat exchanger, a comparison study is also carried out. The experimental setup consists of evacuated tube solar air heater having 8.46 m2 area and 15 kg silica gel adsorbent. The performance metrics for comparison include adsorption & regeneration rate, thermal, overall and exergy efficiency, along with economic analyses. The system harvests 1890 mL/day of water using air‐to‐air heat exchanger at cost of 0.19 $/l, achieving thermal, overall & exergy efficiencies of 21.66%, 2.24%, and 6.51%, respectively. On the other hand, the water‐to‐air heat exchanger based system harvests maximum of 2680 mL/day of water at a cost of 0.14 $/l, achieving thermal, overall & exergy efficiencies of 25.65%, 3.34%, and 9.13%, respectively. Moreover, the produced water is confirmed to be safe for consumption.

show abstract