An experimental study of a pilot scale passive solar hot ~ater heating system utilizing a boiling collector is presented. The self-pumping system alternates between two modes of operation. During the run . cycle, vapor pressure drives the evaporated refr1gerant downward from the collector to the condenser. Once a preset quantity of refrigerant is condensed, vapor pressure is again used to force...

The direct steam generation (DSG) in parabolic trough collectors is an attractive option regarding the economic improvement of parabolic trough technology for solar thermal electricity generation in the multi Megawatt range. The European DISS project has proven the feasibility of the direct steam generation under real solar conditions in more than 4000 operation hours. Within the European R&D p...

In this study, the overall performance of air PV/T, based on energy and exergy analysis has been investigated. Two combinations of air PV/T, which consist of unglazed and glazed air PV/T, are considered. Thermal analysis and numerical calculations were carried out, and the performance parameters of the system for the climate conditions of Kerman were studied. The results are presented in graphs...

Solar panel is popular renewable energy technology because it environmentally friendly, zero emissions, and clean.  However, the conversion value from solar radiation to electricity quiet small, more than 70% of discharged into heat energy.  Therefore, a collector needed take advantage dissipation panel. In this study, an air placed at bottom indicating potential energy, electrical efficiency e...

The influence of the Schottky contact is studied for hole transport material (HTM) free CH3NH3PbI3 perovskite solar cells (PSCs), by using drift-diffusion and small signal models. The basic current-voltage and capacitance-voltage characteristics are simulated in reasonable agreement with experimental data. The build in potential of the finite CH3NH3PbI3 layer is extracted from a Mott-Schottky c...

In this paper a new type of copying garbage collectors is presented. The main goal of the modification of the original method was the reduction of the memory area reserved by the collector. The new Multi-phase Copying Garbage Collection (MC-GC) algorithm reserves only a little part of the memory. It works in more than one phases, using all available free memory areas in each phase. Performance ...

A new type of solid state solar cell is produced by using Fe2O3 (working electrode) and SiC as a hole collector (counter electrode). Two molten salts, 1-ethyl-3-methylimidazolium chloride (EMICl) and 1-butyl-3-methylimidazolium iodide (BMII) were used as crystal growth inhibitors with a SiC film. It was found that BMI1 shows about 10 times higher efficiency compared to an EMICl-based SiC film s...

The geometry of a collector is one of the important factors that can increase the incident radiation on the collector surface. In the present study, the incident radiation for a stationary collector with cone geometry, i.e. a conical collector, is theoretically and experimentally investigated. This type of collector is always stable and does not need a fixture to install. Moreover, it has a...

Abstract We present a selective laterally wet etched collector InP/InGaAs/InGaAsP double heterojunction bipolar transistor (DHBT) with a quaternary step graded base collector structure. This device shows a DC current gain of = 70 over a large collector current range, a breakdown voltage of BVCE0 = 10.5 V, and a maximal collector emitter voltage of more than 5.5 V at 105 A/cm2 collector current ...