Solar energy is a long-established technology, which has zero CO2 emissions, and provides low-cost for given area of land. The concentrator photovoltaic (CPV) been preference over the due to its high efficiency. In CPV system, most solar cell replaced with an optical concentrator. Various parabolic trough based systems have presented where concentration <300 achieved. current research, desig...

We present modeled results of the luminous and color outputs of a three-layer stack of fluorescent planar concentrators (FPCs). FPCs have the potential to provide sufficient luminous output to illuminate moderate-sized rooms for reasonably-sized collecting areas. It is of course necessary not only that the lumens be sufficient, but also that the light be sufficiently white as to be comfortable....

Influence of the Graded Index Cholesteric Liquid Crystal Reflectors on Luminescent Solar Concentrator Efficiency

In the last two decennia the stationary oxygen concentrator has been the most cost effective oxygen source for most patients using long-term oxygen therapy (LTOT). In most countries the oxygen concentrator has, therefore, largely replaced stationary oxygen cylinders with a volume of 10 litres or more. The oxygen concentrator is very convenient and safe for home use. However, for patients needin...

The oxygen concentrator is an accepted means of delivery of long term domiciliary oxygen treatment. Conditions of use, however, need to be carefully defined. Fourteen concentrators were used for one year by patients with hypoxaemic chronic obstructive airways disease, and mechanical reliability, patient compliance with a regimen of 15 hours' use a day, smoking habits, and variation in arterial ...

Electric vehicles (EVs) and photovoltaics (PVs) are new technologies that will play an important role in the transportation industry over next decade. Using solar panels on roofs of cars is one simplest ways to reduce fuel costs increase mobility electric vehicles. Solar can be charged anywhere under Sun without additional infrastructure, but problem size panel limited roof electricity conversi...

An environmental monitoring system is designed to deal with the problems in current solar greenhouse, which mainly composed of concentrator (data exchange terminal) and sampler (sampling terminals). Information of environmental parameter acquired by different sensors in sampling terminals were transmitted to the concentrator by the radio frequency module, a storage circuit was designed in conce...

We present a cost-effective concentrating photovoltaic system composed of a prism and a compound parabolic concentrator (P-CPC). In this approach, the primary collector consists of a prism, a solid compound parabolic concentrator (CPC), and a slab waveguide. The prism, which is placed on the input aperture of CPC, directs the incoming sunlight beam to be parallel with the main axes of parabolic...

Whether long-term oxygen therapy (LTOT) improves quality of life in chronic hypoxaemia has been questioned. LTOT with an oxygen concentrator (C/C) and gas cylinders for ambulation is considered cumbersome compared to mobile liquid oxygen equipment (L). The hypothesis for this study was that LTOT with liquid oxygen treatment (L) improves patients' health-related quality of life, but that it is a...