Experimental investigations of atmospheric water extraction device under different climatic conditions

2020 ◽  
Vol 38 ◽  
pp. 100677 ◽  
Author(s):  
Jatin Patel ◽  
Krunal Patel ◽  
Anurag Mudgal ◽  
Hitesh Panchal ◽  
Kishor Kumar Sadasivuni
Keyword(s):  
Climatic Conditions ◽  
Water Extraction ◽  
Experimental Investigations ◽  
Atmospheric Water ◽  
Extraction Device

scholarly journals A Feasibility Study on the Use of an Atmospheric Water Generator (AWG) for the Harvesting of Fresh Water in a Semi-Arid Region Affected by Mining Pollution

2019 ◽  
Vol 9 (16) ◽  
pp. 3278
Author(s):  
Julio Mendoza-Escamilla ◽  
Francisco Hernandez-Rangel ◽  
Pedro Cruz-Alcántar ◽  
María Saavedra-Leos ◽  
Josefa Morales-Morales ◽  
...  
Keyword(s):  
Rural Communities ◽  
Fresh Water ◽  
Feasibility Study ◽  
New Technologies ◽  
Water Shortage ◽  
Mining Area ◽  
Climatic Conditions ◽  
Production Costs ◽  
Human Consumption ◽  
Atmospheric Water

Worldwide, the shortage of fresh water has increased exponentially due to population growth and contamination of available water, especially in water tables that provide water for general consumption. One of the main pollutants of water is arsenic (As), present in the environment and in most mining/metallurgical processes, which is a major health risk, especially as a carcinogen. In the region of Matehuala, San Luis Potosi (SLP), Mexico, a highly productive mining area, arsenic concentrations of 138.1 mg/kg have been found in soils—6.2 times higher than what is allowed in domestic soils, while in water it is reported up to 158 mg/L, exceeding permissible limits for human consumption. In addition to As pollution, the region suffers from water shortage both in the city and in rural communities. Therefore, it is necessary to explore new technologies to provide the population with fresh water. This paper presents a feasibility study on the use of an atmospheric water generator (AWG) to capture fresh water in the region of Matehuala, SLP. The region was found to have the necessary environmental conditions to use AWGs, with an annual average relative humidity (RH) of approximately 60%. Using a mathematical model of a dehumidifier, water harvesting can be evaluated under the region’s prevailing climatic conditions. The month with lowest harvest was found to be January, with 0.89 to 3.6 L/day, while the month with largest harvest was August at 3.9 to 18 L/day and water production costs of 0.0093 and $ 0.038 USD/L, respectively. The study concludes that the use of AWGs would help alleviate water shortages, thus benefiting marginalized people or communities, preserving ecosystems and the environment.

Analysis of Building Materials for Indoor Thermal Performance and Thermal Comfort

2013 ◽  
Vol 845 ◽  
pp. 472-476
Author(s):  
Harimi Djamila
Keyword(s):  
Thermal Comfort ◽  
Building Materials ◽  
Thermal Conditions ◽  
Climatic Conditions ◽  
Passive Cooling ◽  
Experimental Investigations ◽  
Design Strategies ◽  
Energy Usage ◽  
Whole Space ◽  
Least Energy

In recent years, there has been an increasing interest on energy saving in building sector.Passive cooling is considered the best strategy for improving the indoor thermal conditions and comfortwith lowest cost energy usage. In air-conditioned era, however, many designers have fully forgotten that the main objective of building thermal comfort is not to cool the whole space but rather the resident of the building with the least energy consumption. This investigation is about discussing some of the available passive cooling strategies based on experimental investigations. Results from this study showed that building materialsaffect the indoorair temperature, which in turn willaffect the indoor thermal comfort. Design strategies more suitable under tropical humid climatic conditions were suggested.

scholarly journals Performance Analysis of Flat and Rippled Wick-Inverted V-Type Solar Still Integrated with Drip System in Kerala Climatic Conditions

2013 ◽  
Vol 2013 ◽  
pp. 1-5
Author(s):  
T. Namshad ◽  
K. R. Ayush ◽  
K. C. Salih ◽  
Athul James ◽  
Suficker Ahammed ◽  
...  
Keyword(s):  
Internal Heat ◽  
Working Hours ◽  
Climatic Conditions ◽  
Experimental Investigations ◽  
Solar Still ◽  
The Mean ◽  
Experimental Values ◽  
College Of Engineering ◽  
Desalination Plants ◽  
Internal Heat Transfer

Thermal aspect of solar energy is widely used in the desalination plants. Experimental investigation and mathematical modeling of inverted V-type solar still integrated with drip system are presented in this paper. The experiment is performed in the Kerala climatic conditions (10.8439°N, 76.0328°E), March 2012 at M E S College of Engineering, Kuttippuram. A two segment still of 2 m2 is constructed. Experimental investigations on productivity and internal heat transfer are analyzed. The results indicate that the mean standard deviations between theoretical and experimental values are less than 7% (temperature of rippled wick), 8% (temperature of glass in rippled system), 11% (temperature of flat wick), and 7% (temperature of glass in flat system), an average for the working hours of the day.

EXPERIMENTAL CHECKING OF ABSORPTION OF MOISTURE ABSORBERS IN VARIOUS CLIMATE CONDITIONS

2020 ◽  
Vol 153 (1) ◽  
pp. 87-108
Author(s):  
Janusz Korzeniowski
Keyword(s):  
Molecular Sieves ◽  
Variable Temperature ◽  
Bentonite Clay ◽  
Climatic Conditions ◽  
Silica Gels ◽  
Experimental Investigations ◽  
Water Binding ◽  
Climate Conditions ◽  
Advantages And Disadvantages ◽  
Minimum Relative Humidity

The article presents results of tests for moisture absorbers currently used and available on the market. Experimental investigations were carried out for two types of silica gels, the bentonite clay and two types of molecular sieves available on the market, as well as for the reused silica gel currently deployed in weapon systems. As part of the work, the maximum absorbency of moisture absorbers for various climatic conditions, the minimum relative humidity (RH) in the drying measuring chamber for various amounts of absorbent, and the durability of water binding at variable temperature conditions were determined. Analysis of results allowed both to compare advantages and disadvantages of various absorbents, and to assess a degree of the wear for moisture absorbents currently used in armament equipment.

Experimental Investigations on the Performance of a Packed Bed Dehumidifier for Various Climatic Conditions

1997 ◽  
Vol 15 (3-4) ◽  
pp. 1061-1075 ◽  
Author(s):  
A. Ertas ◽  
P. Gandhidasan ◽  
I. Kiris ◽  
E. E. Andersonn ◽  
M. Dolan
Keyword(s):  
Packed Bed ◽  
Climatic Conditions ◽  
Experimental Investigations

scholarly journals A Study to Explore the Dew Condensation Potential of Cars

Atmosphere ◽  
2021 ◽  
Vol 13 (1) ◽  
pp. 65
Author(s):  
Marc Muselli ◽  
Danilo Carvajal ◽  
Daniel A. Beysens
Keyword(s):  
Visual Observation ◽  
Climatic Conditions ◽  
Atmospheric Water ◽  
Transfer Coefficients ◽  
Thermal Isolation ◽  
Heat Transfer Coefficients ◽  
Observation Scale ◽  
Dew Formation ◽  
Planar Film ◽  
Different Climates

The metal surfaces of a car exhibit favorable properties for the passive condensation of atmospheric water. Under certain nocturnal climatic conditions (high relative humidity, weak windspeed, and total nebulosity), dew is often observed on cars, and it is appropriate to ask the question of using a vehicle as a standard condenser for estimating the dew yield. In order to see whether cars can be used as reference dew condensers, we report a detailed study of radiative cooling and dew formation on cars in the presence of radiating obstacles and for various windspeeds. Measurements of temperature and condensed dew mass on different car parts (rooftop, front and back hoods, windshield, lateral and back windows, inside and outside air) are compared with the same data obtained on a horizontal, thermally isolated planar film. The paper concludes that heat transfer coefficients, evaluated from temperature and dew yield measurements, are found nearly independent of windspeed and tilt angles. Moreover, this work describes the relation between cooling and dew condensation with the presence or not of thermal isolation. This dependence varies with the surface tilt angle according to the angular dependence of the atmosphere radiation. This work also confirms that cars can be used to estimate the dew yields in a given site. A visual observation scale h = Kn, with h the dew yield (mm) and n = 0, 1 2, 3 an index, which depends whether dew forms or not on rooftop, windshield, and lateral windows, is successfully tested with 8 different cars in 5 sites with three different climates, using K = (0.067 ± 0.0036) mm.day−1.

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 Novel Method for the production of Water from Humid Environment of Qatar

2020 ◽  
Author(s):  
Hammad Siddiqui ◽  
Osama Fayyaz ◽  
Syed Zaidi
Keyword(s):  
Water Scarcity ◽  
Middle Eastern ◽  
Climatic Conditions ◽  
Gas Production ◽  
Water Desalination ◽  
Dew Point ◽  
Peltier Effect ◽  
Atmospheric Water ◽  
Novel Method ◽  
Cooling Effects

Water scarcity is the major challenge of the upcoming decades for the entire world. Middle eastern nations are prone to water scarcity due to very less rainfall, scarce fresh water sources, sandy surroundings and harsh humid climatic conditions. Qatar being the leader of natural gas production suffers from the same problem of pure and clean water. Water desalination techniques adopted so far are energy intensive and unknown to oceanic habitat. The use of vapor compression cycle for the condensation of atmospheric water vapor has various limitations such as complex machinery, high power consumption and periodical maintenance. This novel method utilizes heavy humid conditions of Qatar to obtain water from the atmosphere through Peltier Effect. This method uses the dissimilarity of the conductors in the electric circuit such that the current is made to flow through the circuit and the heating and cooling effects are generated at the junctions where cooling temperature of the junction can be achieved below the dew point temperature thus forming the dew which is collected in the closed container as condensed atmospheric water. This technique is superior to other conventional methods of water production due to its cost efficiency, energy saving, simple machinery and portability of the entire system.

Experimental Study on the Hydrodynamic Performance of Floating Pontoon Type Breakwater With Skirt Walls

2017 ◽  
Vol 140 (2) ◽  
Author(s):  
S. Neelamani ◽  
Josko Ljubic
Keyword(s):  
Cost Effective ◽  
Climatic Conditions ◽  
Hydrodynamic Performance ◽  
Experimental Investigations ◽  
Coastal Protection ◽  
Construction Sites ◽  
Incident Wavelength ◽  
Mooring Forces ◽  
Floating Breakwaters ◽  
Effective Design

Floating breakwaters (FBWs) are widely used in moderate wave climatic conditions for coastal protection against erosion and for wave reduction around offshore loading terminals and open ocean construction sites. Literature shows that the width of a pontoon-type FBW is about 50% of the incident wavelength in order to achieve 50% wave height reduction at the lee side of the FBW. Hence, for a typical wavelength of 40 m, the width needed for pontoon FBW is about 20 m. Such an FBW may not be cost competitive. Is it possible to reduce the width of the pontoon FBW significantly by adding skirt walls (single, twin, triple, or five) at its keel. What will be the effect on mooring forces? In order to find solutions for these problems, experimental investigations were carried out on a typical pontoon-type FBW as well as pontoon with skirt walls. Both opaque and porous skirt walls were used. Wave transmission, reflection, and mooring forces, both on the sea side and lee side, were measured. It was found from this study that it is possible to reduce the width by 20 to 40% by introducing three or five skirt walls. However, introducing skirt walls increased the mooring forces by 10 to 30%. The results of this study are expected to be useful for cost-effective design of FBWs.

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