A passive solar tracker and concentrator device must be able to effectively concentrate solar radiation into a constant area throughout the day, without any mobile mechanism. The objective is to achieve 1000 °C on the receptor area with concentrated solar energy, and to accomplish this target a compound Fresnel lens has been designed. Utilizing multidisciplinary CAE software, an integrated mult...

Measuring and charging heat consumption are not often worked out in the prevalent warm-water heating systems. The developed modern heat-meter device, which includes microcontroller, is self-calibrating and self-testing, it uses several correctional algorithms in order to increase accuracy after authentication. Consumption data and information about the work-state events are logged and stored by...

The characterisation of 85 rear-line-contacted silicon concentrator solar cells on one single wafer requires a fast, automated measurement system. In this paper an easy to use needle array measurement system is presented, which allows an automated sequential measurement of dark and light IV curves of all cells on one wafer. For acquiring IV curves under high illumination levels (up to 500 suns)...

An ultrasonic particle concentrator based on a standing-wave hemispherical resonator is combined with confocal laser-scanning fluorescence detection. The goal is to perform ultrasensitive biomedical analysis by concentration of biologically active microspheres. The standing-wave resonator consists of a 4 MHz focusing ultrasonic transducer combined with the optically transparent plastic bottom o...

Numerous research studies have been done to improve the gold recovery methods and to fi nd alternative processing techniques in the last decade. The main goal in this search has become to design an effi cient plant employing environmentally acceptable processes today. For this purpose, the application of environmentally friendly, no chemical included techniques like centrifugal gravity separato...

9 ABSTRACT | The development of a thermochemical energy 10 storage system based on ammonia, for use with concentrating 11 solar power is discussed in this paper. This is one of a group of 12 storage options for concentrating solar power, some of which 13 are already operating commercially using molten salts. The 14 ammonia storage development has involved prototype solar 15 receiver/reactors op...

In this paper, a multi-layer and multi-dish model was proposed for a multi-dish concentrator system. Based on the model, the flux distribution of focal plane was calculated by Monte Carlo ray tracing method (MCRTM). The results show that the multi-dish concentrator system is composed of three different focal length parabolic surfaces. The design parameters calculated from the model have a good ...

A sparse crossbar (n,m)-concentrator is a bipartite graph with n source and m sink vertices, m ≤ n, in which there exists a matching between every m source vertices and the m sink vertices. In this paper, we investigate the structure, and the density of sparse crossbar (n,m)-concentrators among all 2 bipartite graphs. We establish that the density of sparse crossbar concentrators is bounded fro...

Acurex Corporation, under contract to the Jet Propulsion Laboratory, is developing a second generation point focusing solar concentrator. The design is based on reflective gores fabricated of thin glass mirror bonded continuously to a contoured substrate of cellular glass. To date the preliminary design effort is complete and is reviewed in this presentation. The concentrator aperture and struc...

This study presents a design method to fabricate a novel hybrid-structure flat plate heat pipe (NHSP heat pipe) for a concentrator photovoltaic. The NHSP heat pipe is composed of a flattened copper pipe and a sintered wick structure, and a coronary-stent-like rhombic copper mesh supports the structure. The coronary-stent-like supporting structure enhances the mechanical strength and shortens th...