Experimental, Theoretical and CFD Validations for Solar Powered Atmospheric Water Generation Using Thermoelectric Technics

2021 ◽  
Vol 21 (2) ◽  
pp. 17-28
Author(s):  
Mohammed Alsheekh ◽  
Saleh E. Najim ◽  
Hussein S. Sultan
Keyword(s):  
Numerical Study ◽  
Environmental Water ◽  
Water Recovery ◽  
Water Production ◽  
Atmospheric Water ◽  
Climate Conditions ◽  
Maximum Water ◽  
Model Size ◽  
Solar Powered ◽  
South Of Iraq

The Atmospheric Water Generator (AWG) is an environmental water recovery that easily dehumidifies water vapor moisture from the air. This article presents an experiment to construct an AWG model using solar energy as a source of power. An experimental and numerical study for a device of (AWG) is performed. The experimental work is performed at Basrah city, located in the south of Iraq, during August and September of 2019 and March of 2020. The theoretical results are calculated by EES and the numerical study has been conducted by the (ANSYS19/CFD/ FLUENT) program. The experimental device is tested for different days with different climate conditions. The Maximum water production obtained is 3.4 L/day from all the testing days, for different hours of operation when the relative humidity in the range of (45 – 95 %) and the temperature range from 17 °C to 45 °C. The results shown that, the water production rate is increased with increasing humidity, temperatures, hours of operation, and model size.

Sunlight-driven atmospheric water capture capacity is enhanced by nano-enabled photothermal desiccants

2020 ◽  
Vol 7 (9) ◽  
pp. 2584-2594
Author(s):  
Anjali Mulchandani ◽  
Shannon Malinda ◽  
Justin Edberg ◽  
Paul Westerhoff
Keyword(s):  
Drinking Water ◽  
Water Vapor ◽  
Water Production ◽  
Atmospheric Water ◽  
Alternative Method ◽  
Capture Capacity

Atmospheric water capture (AWC) is an alternative method of localized water production whereby water vapor is removed from air to produce drinking water.

scholarly journals Experimental and numerical study of the domestic hot water production with PV panels and a heat pump

2019 ◽  
Vol 111 ◽  
pp. 01066
Author(s):  
F. J. Aguilar ◽  
D. Crespí ◽  
P. V. Quiles
Keyword(s):  
Heat Pump ◽  
Computer Model ◽  
Numerical Study ◽  
Hot Water ◽  
Water Production ◽  
Storage Tanks ◽  
European Standard ◽  
Photovoltaic Panels ◽  
Domestic Hot Water ◽  
Experimental Works

This article presents an experimental and modelling work which uses a compact domestic hot water heat pump (DHW-HP) that is simultaneously powered from photovoltaic panels (PV) and from the grid. Results from more than 240 days of experimental works have been used in order to develop and to validate the computer model of the system. The program, implemented in MATLAB, is computationally ‘light’ enough to allow mid-term simulations yet also detailed enough to accurately and coherently portray stratification within thermal storage tanks. Finally, as an example of the model capabilities, it has been used to simulate a domestic hot water tapping cycle from the European Standard EN 16147.

scholarly journals A predictive protocol to obtain maximum water-free oil production rate for perforated vertical wells

2020 ◽  
Author(s):  
James O. Adeleye ◽  
Olugbenga Olamigoke ◽  
Oluseun T. Mumuni
Keyword(s):  
Computational Model ◽  
Production Rate ◽  
Skin Effect ◽  
Oil Production ◽  
Cost Effective ◽  
Water Production ◽  
Skin Model ◽  
Vertical Wells ◽  
Flow Mechanisms ◽  
Maximum Water

Abstract Producing an oilfield in a cost-effective way depends on how long water production could be delayed in the reservoir. Many flow mechanisms, correlations, and methods to calculate maximum water-free oil production rate have been published, However, those methods have generally failed to not consider the skin effect which affects the flow into the wellbore. In this paper, the semi-analytical perforation skin model as presented by Karakas and Tariq is incorporated into the Meyer and Garder correlation for critical oil rate from a perforated vertical well interval to obtain the maximum water-free oil production rate and optimal perforation parameters. The resulting coupled computational model is used to determine the sensitivity of the maximum water-free oil production rate to wellbore perforation parameters. Whilst an increase in perforation length and decrease in spacing between perforation increase the critical flow rate, an increase in perforation radius did not translate to higher productivity. The optimal perforation angles are 45° and 60°, however, for the data used in this work the maximum water-free oil rate of 23.2 std/d was obtained at 45° of phasing angle, 1 in of spacing between perforation, 0.36 in of perforation radius and 48 in of perforation length. Thus, the perforation strategy can be optimized prior to drilling and completion operations to improve productivity using the computational model presented in this work.

Numerical Study of Transport Membrane Condenser Heat Exchangers

2016 ◽  
Author(s):  
Esmaiil Ghasemisahebi ◽  
Soheil Soleimanikutanaei ◽  
Cheng-Xian Lin ◽  
Dexin Wang
Keyword(s):  
Flue Gas ◽  
Heat Exchangers ◽  
Ceramic Membrane ◽  
Waste Heat ◽  
Numerical Study ◽  
Tube Bundle ◽  
Pure Water ◽  
Separation Mechanism ◽  
Low Grade ◽  
Water Recovery

In this study tube bundle Transport Membrane Condenser (TMC) has been studied numerically. The tube walls of TMC based heat exchangers are made of a nano-porous material and has a high membrane selectivity which is able to extract condensate pure water from the flue gas in the presence of other non-condensable gases (i.e. CO2, O2 and N2). Low grade waste heat and water recovery using ceramic membrane, based on separation mechanism, is a promising technology which helps to increase the efficiency of boilers and gas or coal combustors. The effects of inclination angles of tube bundle, different flue gas velocities, and the mass flow rate of water and gas flue have been studied numerically on heat transfer, pressure drop and condensation rates. To assess the capability of single stage TMC heat exchangers in terms of waste heat and water recovery at various inlet conditions, a single phase multi-component model is used. ANSYS-FLUENT is used to simulate the heat and mass transfer inside TMC heat exchangers. The condensation model and related source/sink terms are implemented in the computational setups using appropriate User Defined Functions (UDFs).

scholarly journals Energy performance and climate dependency of technologies for fresh water production from atmospheric water vapour

2020 ◽  
Vol 6 (8) ◽  
pp. 2016-2034
Author(s):  
Robin Peeters ◽  
Hannah Vanderschaeghe ◽  
Jan Rongé ◽  
Johan A. Martens
Keyword(s):  
Water Vapour ◽  
Fresh Water ◽  
Water Scarcity ◽  
Energy Performance ◽  
Water Extraction ◽  
Water Production ◽  
Atmospheric Water ◽  
Atmospheric Water Vapour

Solving the water scarcity problem by enhancing water extraction from air technology.

scholarly journals A Study on the CO2-Enhanced Water Recovery Efficiency and Reservoir Pressure Control Strategies

Geofluids ◽  
2019 ◽  
Vol 2019 ◽  
pp. 1-17 ◽  
Author(s):  
Zhijie Yang ◽  
Tianfu Xu ◽  
Fugang Wang ◽  
Yujie Diao ◽  
Xufeng Li ◽  
...  
Keyword(s):  
Saline Water ◽  
Control Strategies ◽  
Production Capacity ◽  
Junggar Basin ◽  
Pressure Control ◽  
Reservoir Pressure ◽  
Water Recovery ◽  
Water Production ◽  
Well Spacing ◽  
Production Wells

CO2 geological storage (CGS) proved to be an effective way to mitigate greenhouse gas emissions, and CO2-enhanced water recovery (CO2-EWR) technology may improve the efficiency of CO2 injection and saline water production with potential economic value as a means of storing CO2 and supplying cooling water to power plants. Moreover, the continuous injection of CO2 may cause a sharp increase for pressure in the reservoir system, so it is important to determine reasonable reservoir pressure control strategies to ensure the safety of the CGS project. Based upon the typical formation parameters of the China Geological Survey CO2-EWR test site in the eastern Junggar Basin, a series of three-dimensional (3D) injection-extraction models with fully coupled wellbores and reservoirs were established to evaluate the effect of the number of production wells and the well spacing on the enhanced efficiency of CO2 storage and saline production. The optimal key parameters that control reservoir pressure evolution over time are determined. The numerical results show that a smaller spacing between injection and production wells and a larger number of production wells can enhance not only the CO2 injection capacity but also the saline water production capacity. The effect of the number of production wells on the injection capacity and production capacity is more significant than that of well spacing, and the simulation scenario with 2 production wells, one injection well, and a well spacing of 2 km is more reasonable in the demonstration project of Junggar Basin. CO2-EWR technology can effectively control the evolution of the reservoir pressure and offset the sharp increase in reservoir pressure caused by CO2 injection and the sharp decrease of reservoir pressure caused by saline production. The main controlling factors of pressure evolution at a certain spatial point in a reservoir change with time. The monitoring pressure drops at the beginning and is controlled by the extraction of water. Subsequently, the injection of CO2 plays a dominant role in the increase of reservoir pressure. Overall, the results of analysis provide a guide and reference for the CO2-EWR site selection, as well as the practical placement of wells.

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