WASTE NATURAL GAS-BASED ATMOSPHERIC WATER HARVESTING FOR OIL PRODUCTION

2017 ◽  
Author(s):  
Enakshi Wikramanayake ◽  
Onur Ozkan ◽  
Vaibhav Bahadur
Keyword(s):  
Natural Gas ◽  
Oil Production ◽  
Water Harvesting ◽  
Atmospheric Water

Modeling humid air condensation in waste natural gas-powered atmospheric water harvesting systems

2017 ◽  
Vol 118 ◽  
pp. 224-232 ◽  
Author(s):  
Onur Ozkan ◽  
Enakshi D. Wikramanayake ◽  
Vaibhav Bahadur
Keyword(s):  
Natural Gas ◽  
Water Harvesting ◽  
Atmospheric Water ◽  
Humid Air ◽  
Harvesting Systems

INTERFACES BETWEEN ATMOSPHERIC WATER HARVESTING AND SOLAR ENERGY: EVIDENCES FROM A BIBLIOMETRIC STUDY

2021 ◽  
Author(s):  
Ana Carolina Lamas da Silva ◽  
Elias Rocha Gonçalves Junior ◽  
Virgínia Siqueira Gonçalves
Keyword(s):  
Solar Energy ◽  
Bibliometric Study ◽  
Water Harvesting ◽  
Atmospheric Water

scholarly journals Exploiting radiative cooling for uninterrupted 24-hour water harvesting from the atmosphere

2021 ◽  
Vol 7 (26) ◽  
pp. eabf3978
Author(s):  
Iwan Haechler ◽  
Hyunchul Park ◽  
Gabriel Schnoering ◽  
Tobias Gulich ◽  
Mathieu Rohner ◽  
...  
Keyword(s):  
Radiative Heat ◽  
Outer Space ◽  
Continuous Production ◽  
Solar Irradiation ◽  
Cooling Power ◽  
Water Harvesting ◽  
Atmospheric Water ◽  
Promising Alternative ◽  
Mass Fluxes ◽  
Power Enhancement

Atmospheric water vapor is ubiquitous and represents a promising alternative to address global clean water scarcity. Sustainably harvesting this resource requires energy neutrality, continuous production, and facility of use. However, fully passive and uninterrupted 24-hour atmospheric water harvesting remains a challenge. Here, we demonstrate a rationally designed system that synergistically combines radiative shielding and cooling—dissipating the latent heat of condensation radiatively to outer space—with a fully passive superhydrophobic condensate harvester, working with a coalescence-induced water removal mechanism. A rationally designed shield, accounting for the atmospheric radiative heat, facilitates daytime atmospheric water harvesting under solar irradiation at realistic levels of relative humidity. The remarkable cooling power enhancement enables dew mass fluxes up to 50 g m−2 hour−1, close to the ultimate capabilities of such systems. Our results demonstrate that the yield of related technologies can be at least doubled, while cooling and collection remain passive, thereby substantially advancing the state of the art.

Risk Assessment and Enhanced Oil Recovery Effect of Gravity Assisted Oxygen-Reduced Air Flooding

2021 ◽  
Author(s):  
Lijuan Huang ◽  
Zongfa Li ◽  
Shaoran Ren ◽  
Yanming Liu
Keyword(s):  
Natural Gas ◽  
Oil Recovery ◽  
Gas Injection ◽  
Oil Production ◽  
Air Injection ◽  
Oil Reservoirs ◽  
Displacement Efficiency ◽  
Risk Area ◽  
Recovery Method ◽  
High Risk Area

Abstract The technology of air injection has been widely used in the second and tertiary recovery in oilfields. However, due to the injected air and natural gas will explode, the safety of the gas injection technology has attracted much attention. Gravity assisted oxygen-reduced air flooding is a new method that eliminates explosion risks and improves oil recovery in large-dip oil reservoirs or thick oil layers. The explosion limit data of different components of natural gas under high pressure were obtained through explosion experiments, which verified the suppression effect of oxygen-reduced air on explosions. The influence of natural gas composition and concentration on explosion limits was also investigated. In addition, a rotatable displacement device was used to study the feasibility of gravity assisted oxygen-reduced air injection for improving the heavy oil reservoirs recovery. Under pressure and temperature conditions of 20MPa and 371K, the sand-filled gravity flooding experiments with different dip angles were carried out using oxygen-reduced air with an oxygen content of 8%. The results show that with the increase of the reservoir dip, the pore volume of the injected fluid at the gas channeling point, the efficient development time of gas injection, and the final displacement efficiency of gas injection development all increase through gravity stabilization caused by gravity differentiation. In the presence of a dip angle, the cumulative oil production before the gas breakthrough point exceeded 80% of the oil production during the entire production process, indicating that gravity assisted oxygen-reduced air flooding is an effective and safe improving oil recovery method. Finally, the explosion risk of each link of the air injection process is analyzed, and the high-risk area and the low-risk area are determined.

scholarly journals Super Moisture-Absorbent Gels for All-Weather Atmospheric Water Harvesting

2019 ◽  
Vol 31 (10) ◽  
pp. 1806446 ◽  
Author(s):  
Fei Zhao ◽  
Xingyi Zhou ◽  
Yi Liu ◽  
Ye Shi ◽  
Yafei Dai ◽  
...  
Keyword(s):  
Water Harvesting ◽  
Atmospheric Water ◽  
Moisture Absorbent
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