Water production by underground condensation of humid air

Lindblom, Jenny; Nordell, Bo

doi:10.1016/j.desal.2005.08.002

Cited by 56 publications

(26 citation statements)

References 2 publications

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“…There has been a severe lack of fresh water in the world; especially in developing countries. Along with the deterioration of existing water supplies and increasing demand on water consumption it is expected that two-thirds of the population will lack sufficient fresh water by the year 2025 [2].…”

Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Investigation of Dew Potential based on Long-Term Model Simulations in Iran

Atashi

Rahimi

Goortani

et al. 2019

Water

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Since water shortage has been a serious challenge in Iran, long-term investigations of alternative water resources are vital. In this study, we performed long-term (1979–2018) model simulation at seven locations (costal, desert, mountain, and urban conditions) in Iran to investigate temporal and spatial variation of dew formation. The model was developed to simulate the dew formation (water and ice) based on the heat and mass balance equation with ECMWF-ERA-Interim (European Centre for Medium-Range Weather Forecasts–Re-Analysis) meteorological data as input. According to the model simulation, the maximum mean yearly cumulative dew yield (~65 L/m2) was observed in the mountain region in the north part of Iran with a yearly mean cumulative dew yield was ~36 L/m2. The dew yield showed a clear seasonal variation at all selected locations with maximum yields in winter (mean monthly cumulative 3–8 L/m2 depending on the location). Here we showed that dew formation is frequent in northern Iran. In other areas, where there was suffering from water-stress (southern and central parts of Iran), dew can be a utilized as an alternative source of water. The dew yield during 2001–2014 was lower than the overall mean during the past 40 years a result of climate change in Iran.

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Section: Introductionmentioning

confidence: 99%

Spatial and Temporal Investigation of Dew Potential based on Long-Term Model Simulations in Iran

Atashi

Rahimi

Goortani

et al. 2019

Water

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“…In the last few years these active methods of harvesting atmospheric moisture have been researched extensively. Numerous research papers have been published [1,4,5,19] and the research has traversed in many directions including: new harvesting methods and equipment [6,8,14,21,22], improving the efficiency of existing hardware [18,20,25] and examining the viability of these methods to geographic locales [17,24]. …”

Section: -Previous Work Investigationmentioning

confidence: 99%

Water Collection from Air Humidity in Bahrain

et al. 2017

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The Kingdom of Bahrain falls geographically in one of the driest regions in the world. Conventional fresh surface water bodies, such as rivers and lakes, are nonexistent and for water consumption, Bahrain prominently relies on the desalination of sea water. This paper presents an ongoing project that is being pursued by a group of student and their advising professors to investigate the viability of extracting water from air humidity. Dehumidifiers have been utilized as water extraction devices. Those devices have been distributed on six areas that were selected based on a rigorous geospatial modeling of historical meteorological data. The areas fall in residential and industrial neighborhoods that are located in the main island and the island of Muharraq. Water samples have been collected three times every week since May of 2016 and the collection process will continue until May of 2017. The collected water samples have been analyzed against numerous variables individually and in combinations including: amount of water collected per hour versus geographical location, amount of water collected per hour versus meteorological factors, suitability of collected water for potable human consumption, detection of air pollution in the areas of collection and the economy of this method of water collection in comparison to other nonconventional methods. An overview of the completed analysis results is presented in this paper.

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“…The rest of the day was devoted to nightly ground cooling, when cool ambient air at varying temperatures was circulated through the pipes. The pipe configuration in the models comprised 50 meter long parallel pipes placed 1.0 meter apart at 0.5 meter's depth [15,16] in a soil with properties set according to Table 1.…”

Section: Subsurface Condensation Irrigationmentioning

confidence: 99%

“…Recent studies on Condensation Irrigation has involved theoretical analyses on one drinking water system and one sub-surface irrigation system using buried drainage pipes [15,16].…”

Section: Condensation Irrigationmentioning

confidence: 99%

Subsurface irrigation by condensation of humid air

Lindblom¹,

Nordell²

2006

WIT Transactions on Ecology and the Environment, 96

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Condensation Irrigation (CI) is a combined system for solar desalination and irrigation. Solar stills are used to humidify ambient air flowing over the saline water surface in the stills. This warm, humid air is then led into an underground system of drainage pipes where it is cooled and vapour precipitates as freshwater. The condensed water and some humid air percolate through the pipe perforations and irrigate and aerate the ground. Mass and heat transfer in the soil-pipe system has been modelled to evaluate the theoretical productivity for these types of systems. For a presumed pipe configuration and climate, 3.1 kg water per pipe-meter and day was condensed inside the buried pipe, yielding 2.3 mm/d irrigation water. Pilot plants on the CI system and are now in operation in Tunisia and Algeria. Another CI plant is planned in Libya.

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Water production by underground condensation of humid air

Cited by 56 publications

References 2 publications

Spatial and Temporal Investigation of Dew Potential based on Long-Term Model Simulations in Iran

Spatial and Temporal Investigation of Dew Potential based on Long-Term Model Simulations in Iran

Water Collection from Air Humidity in Bahrain

Subsurface irrigation by condensation of humid air

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