New architectural forms to increase dew collection (original) (raw)

Analysis of different condensing surfaces for dew harvesting

Water Supply, 2021

Due to water shortages in several places in the world, alternative water sources such as atmospheric water and greywater have been studied. Dew water harvesting by passive radiative cooling is an unconventional water source that is easy to use, install, and shows great potential in several places in the world. This paper aims to experimentally evaluate the dew yield through passive radiative cooling in Vicosa city, Minas Gerais, Brazil by using standard white plastic for dew harvesting, developed by the International Organization for Dew Utilization (OPUR), polypropylene plastic, black plastic, packaging tape, and anodized aluminum as condensing surfaces during two different periods. The polypropylene plastic and packing tape materials used in this present research have not been researched before in the literature. However, they have demonstrated potential for harvesting dew. As a result, the average water collected was, respectively, 0.151, 0.135, 0.140, 0.127, and 0.046 mm/night u...

A comparative study of two large radiative dew water condensers

Journal of Arid Environments, 2006

In order to improve the yield of dew condensation from atmospheric vapor, two large (30m2 in area) insulated plane radiative condensers, inclined at 30°, were installed in Ajaccio (Corsica island, France; latitude 41°55′N, longitude 8°48′E). Prototype P1 was elevated such that the underside was open and exposed. Prototype P2, however, was enclosed on all sides and closer to the ground.

Large Dew water collectors in a village of S-Morocco (Idouasskssou)

2010

The coastal region of south Morocco presents a chronically shortage of drinkable and fresh water. Measurements in the village of Mirleft have shown that collecting dew water could provide 40 % of the rain fall. In order to show to the local population the interest of recovering dew water in addition to rain water, three pilot condensers of terrace, roof and ground type with 136 m total surface area was erected in a small nearby village (Idouasskssou, 8 km SE of Mirleft). A good integration of the project by the village inhabitants was ensured by the cooperation of the local organization IMRJANE. The water production from 15-12-2008 to 31-07-2009 (6 months, 137 dew events for 47 % of days) was more than 3800 L (0.2 mm/dew day). While the devices are specifically designed to condense dew water, they also harvest rain and fog as well.

Dew, Fog and Rain Collector in a Hyper-arid Climate: Case Study in Abu Dhabi

E3S Web of Conferences, 2019

Dew condensers collect dew via thermal radiation and cooling affect without the use of external energy. The aim of this project was to design the 1m x 1m with 30° angle square funnel dew, fog and rainwater collector to calculate the dew yield in Abu Dhabi urban area. In addition, studies were conducted to determine whether the collected dew quantity is significant for practical use and to verify the cooling effect in condenser surface using temperature sensors. Aluminum was chosen as dew collector material due to its high emissivity. Square funnel was chosen as condenser shape due to easiness of the assembly and feasibility of its design. The quantity of the collected water depended on the weather condition. The average collected water was 0.016 ml/day (0.016 mm/m2 /day). Temperature sensor analysis showed that there was a 3.5 °C temperature difference between condenser top and bottom indicating the cooling effect of square funnel shape.