Solar panel conversion efficiency, typically in the twenty percent range, is
reduced by dust, grime, pollen, and other particulates that accumulate on the
solar panel. Cleaning dirty panels to maintain peak efficiency, which is
especially hard to do for large solar-panel arrays. To develop a transparent,
anti-soiling Nano-TiO2 coating to minimize the need for occasional cleaning is
the purpose of ... hiện toàn bộ
Christian Fertner, Gertrud Jørgensen, Thomas Alexander Sick Nielsen, Kjell Svenne Bernhard Nilsson
Urban growth management has become a common term to circumscribe strategies and
tools to regulate urban land use in metropolitan areas. It is particularly used
to counteract negative impacts of urban sprawl but also to frame future urban
development. We discuss recent challenges of urban growth in 6 European and 2 US
American city-regions. The paper compares the urban development focusing on a
qua... hiện toàn bộ
The excellent thermal insulation performance of vacuum insulation panels (VIPs)
make them widely applied in energy conservation fields, especially in buildings
engineering. This research work proposes a simple, yet extremely effective,
alternative model for prediction of the effective thermal conductivity (ETC.) of
VIPs. The ETC. of VIPs is function of the thermal conductivity of the core
material... hiện toàn bộ
Martial Aloys Ekoe a Akata, Donatien Njomo, Blaise Mempouo
The building sector accounts for around 40-50 % of the energy consumed in
developing countries and contribute over 30 % of CO2 emissions. In Cameroon, the
electricity access is less than 5 % in rural areas against 50 % in urban areas.
All sectors combined the Cameroonian final energy consumption amounts to
approximately 5235 kilo-tonnes of oil equivalent (Ktoe) and 73 % of this energy
are assigned... hiện toàn bộ
Monthly-averaged daily global irradiation data are now easily available from
NASA website for any global location. Using established models it is then
possible to decompose the daily to averaged-hourly global irradiation. The
missing link so far has been hourly averaged diffuse irradiation. In this
article data was pooled from 14 world-wide locations to obtain a regression
model to complete the ab... hiện toàn bộ
More than half of the world’s population currently lives in cities. An essential
constituent of future sustainable cities is energy efficient and ecologically
sound buildings which ensure high levels of comfort and convenience without
reducing the standards of living. At present, a significant part of primary
fossil fuels is spent for heating/cooling of buildings, thus, greatly
contributing to tot... hiện toàn bộ
The question of density is closely connected to urbanization and how our cities
may evolve in the future. Density and compactness are two closely related but
different criteria, both relevant for sustainable urban development and the
transformation of cities; however, their relationship is not always well
understood. While a high degree of compactness is desirable, too much density
can be detrimen... hiện toàn bộ