Mathematical framework for predicting solar thermal build-up of spectrally selective coatings at the Earth’s surface

High performance Thermal Coating Comprising (CuO:NiO) Nanocomposite/C Spectrally Selective to Absorb Solar Energy

A novel nanocomposite consisted of nanomaterials as (CuO:NiO) and carbon (fuel ash) were designed to absorb solar energy. Thin films were made via casting and spin coating of the dopants nanocomposite thin films, containing different concentration ratios of CuO:NiO. These thin films are precipitated on a glass and copper substrates. The optical properties of the doped fuel ash films with na...

Selective Surface for efficient Solar Thermal Conversion

E n e r g y i s t h e p r i m a r y a n d m o s t u n i v e r s a l m e a s u r e o f a l l k i n d s o f w o r k b y h u m a n b e i n g a n d n a t u r e . E v e r y t h i n g t h a t h a p p e n s i n t h e w o r l d i s t h e e x p r e s s i o n o f f l o w o f e n e r g y i n o n e o f i t s f o r m s . I f t h e q u e s t i o n i s a s k e d a s t o w h a t e n e r g y s o u r c e w i l l...

Review of physical vapor deposited ( PVD ) spectrally selective coatings for mid - and high - temperature solar thermal applications

Design of selective coatings for solar thermal applications using sub- wavelength metal-dielectric structures

Spectral control of the emissivity of surfaces is essential in applications such as solar thermal energy and thermophotovoltaic energy conversion in order to achieve the highest conversion efficiencies possible. We investigated surfaces consisting of periodic, nanoscale V-grooves coated with aperiodic metal-dielectric stacks. This approach combines impedance matching using tapered metallic feat...

conditional copula-garch methods for value at risk of portfolio: the case of tehran stock exchange market

ارزش در معرض ریسک یکی از مهمترین معیارهای اندازه گیری ریسک در بنگاه های اقتصادی می باشد. برآورد دقیق ارزش در معرض ریسک موضوع بسیارمهمی می باشد و انحراف از آن می تواند موجب ورشکستگی و یا عدم تخصیص بهینه منابع یک بنگاه گردد. هدف اصلی این مطالعه بررسی کارایی روش copula-garch شرطی در برآورد ارزش در معرض ریسک پرتفویی متشکل از دو سهام می باشد و ارزش در معرض ریسک بدست آمده با روشهای سنتی برآورد ارزش د...