TY - JOUR
T1 - Roof-integrated dew water harvesting in Combarbalá, Chile
AU - Carvajal, Danilo
AU - Minonzio, Jean Gabriel
AU - Casanga, Elvira
AU - Muñoz, Jorge
AU - Aracena, Alvaro
AU - Montecinos, Sonia
AU - Beysens, Daniel
N1 - Funding Information:
This work was made possible by collaboration between the International Organization for Dew Utilization (OPUR), the Municipality of Combarbalá (through its counsellor Jorge Muñoz) and the Universidad de La Serena. The work was supported by FONDECYT project N 11140863 from CONICYT (Chile) and Plan de Mejoramiento Institucional en Eficiencia Energética y Sustentabilidad Ambiental ULS-1401. Special thanks are extended to the Centro de Estudios Avanzados en Zonas Áridas (CEAZA) for providing meteorological data; to Engineer Victor Meléndez Vejar for data transcription, to Engineer Patricio Arancibia for analysing satellite images and to Professor Dahyann Araya-Muñoz, who provided excellent maps.
Publisher Copyright:
© IWA Publishing 2018.
PY - 2018/6
Y1 - 2018/6
N2 - Dew harvesting can be a supplementary source of freshwater in semiarid and arid areas. Several experiments on small-scale dew condensers (usually of 1 m2) have been carried out in many places in the world; however, few experiments have been conducted on large-scale collectors integrated into buildings. This work aims to assess one year of dew water harvesting in Combarbalá (Chile) using a painted galvanised steel roof as collecting surface. The roof (36 m2) was coated with a high-infrared-emissivity paint containing aluminosilicate minerals (OPUR, France). Dew measurements were conducted daily from September 2014 to August 2015. The dew yield and its relationship with meteorological variables were analysed. The results show that despite the low nocturnal relative humidity throughout the year (average: 48%), dew collection occurred on 56.1% of the recorded days. The daily average collection rate was 1.9 L d1, with a maximum of 15 L d1. The maximum daily dew yield is correlated strongly with relative humidity and correlated weakly with air temperature and wind speed. Considering the same rooftop can collect dew and rain, it was estimated that over one year dew water could contribute to roughly 8.2% of the total water collected, considering both sources.
AB - Dew harvesting can be a supplementary source of freshwater in semiarid and arid areas. Several experiments on small-scale dew condensers (usually of 1 m2) have been carried out in many places in the world; however, few experiments have been conducted on large-scale collectors integrated into buildings. This work aims to assess one year of dew water harvesting in Combarbalá (Chile) using a painted galvanised steel roof as collecting surface. The roof (36 m2) was coated with a high-infrared-emissivity paint containing aluminosilicate minerals (OPUR, France). Dew measurements were conducted daily from September 2014 to August 2015. The dew yield and its relationship with meteorological variables were analysed. The results show that despite the low nocturnal relative humidity throughout the year (average: 48%), dew collection occurred on 56.1% of the recorded days. The daily average collection rate was 1.9 L d1, with a maximum of 15 L d1. The maximum daily dew yield is correlated strongly with relative humidity and correlated weakly with air temperature and wind speed. Considering the same rooftop can collect dew and rain, it was estimated that over one year dew water could contribute to roughly 8.2% of the total water collected, considering both sources.
KW - Atmospheric water
KW - Dew collection
KW - Radiative cooling
KW - Water resources
UR - http://www.scopus.com/inward/record.url?scp=85052752412&partnerID=8YFLogxK
U2 - 10.2166/aqua.2018.174
DO - 10.2166/aqua.2018.174
M3 - Article
AN - SCOPUS:85052752412
VL - 67
SP - 357
EP - 374
JO - Journal of Water Supply: Research and Technology - AQUA
JF - Journal of Water Supply: Research and Technology - AQUA
SN - 0003-7214
IS - 4
ER -