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
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
India is known to emit large amounts of black carbon (BC) particles, and the
existing estimates of the BC emission from the transport sector in the country
widely range from 72 ~ 456 Gg/year (for the 2000’s). First, we reduce the
uncertainty range by constraining the existing estimates by credible isotope
analysis results. The revised estimate is from 74 ~ 254 Gg/year. Second, we
derive our own BC... hiện toàn bộ
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
Building energy evaluation tools available today are only able to effectively
analyse individual buildings and usually either they require a high amount of
input data or they are too imprecise in energy predictions at a city (district)
scale because of too many assumptions made. In this paper, two tools based on 3D
models are compared to see whether there is an approach that would probably be
able... hiện toàn bộ