Category EuroSun2008-3

Method to find Xm

The parallel lines in 3D space appear in the image to meet at a point when their plane is not parallel to the image plane (Figure 4). This point of convergence is called the vanishing point and can be used to determine distances in the real world [2]. The vanishing point of lines is sufficient to analyze and detect the edges without the need for completely calibrating the camera used. In the case of the BiFres system, the structure frame of the concentrator is a rectangle with four metal sides. The four corners are easy features to locate from the pictures and their coordinates are used to form the equations of lines. The equations of lines are solved simultaneously to locate their intersection; the vanishing point...

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Experimental layout of the system

Подпись: Figure 4. Experimental rig Подпись: Figure 5. PIV system

The experiment was conducted in the solar calorimetry laboratory. The tests were carried out in an air – conditioned room having an average temperature of 23°C. Figure 4 shows the pictures of the experimental test rig, while figure 5 shows the PIV system.

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Model development

1.1. General specifications

The PVT system modelled uses air as the heat transfer fluid, drawn through a duct at the rear of the PV modules, and has a glass cover. In winter, air is drawn past the rear of the photovoltaic panels and ventilated into the house. In summer, it is envisaged that air would be drawn in from underground using an air/earth heat exchanger and the heated outlet air would be ventilated to the outside, however, this is not investigated here. Such an earth/air heat exchanger would also be used during winter. In this modelling only the household heating was examined and for simplicity the outdoor air was used as the inlet air for the PVT system.

The example house used for modelling is an existing 100m2 single storey three bedroom house located in Sydney for which the flo...

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Research approach

1.1. Goals

The just described experience demonstrates that a deep attention has to be paid in planning SHC-CHP systems from three points of view: layout, control strategy and machine sizes. The present research work proposes a first layout with a specific control strategy and a procedure for sizing such a plant with the main goal to avoid issues like the above mentioned. The selected plant configuration is then simulated in TRNSYS along one year to analyse the off-design behaviour of the single components, their interaction and the performance of the overall system.

1.2. Major hypothesis

The selected layout and the sizing procedure have been applied supposing the EURAC building to be the final user. In this regard, data derived from the installed monitoring system have been used...

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Performance of a multifunctional PV/T hybrid solar window

Henrik Davidsson*, Bengt Perers, Bjorn Karlsson

Energy and BuildingDesign, Lund University, B. O Box 118, SE 221 00 Lund, Sweden
Corresponding Author, henrik. davidsson@ebd. lth. se
Abstract

A building-integrated multifunctional PV/T collector have been developed and evaluated. The PV/T solar window is constructed of PV cells laminated on solar absorbers and is placed in a window behind the glazing. To reduce the costs of the solar electricity, reflectors have been introduced in the construction to focus radiation onto the solar cells. The tiltable reflectors render a possibility to control the amount of radiation transmitted into the building. The insulated reflectors also reduce the thermal losses through the window...

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Multi Solar (PVT) Co-Generation Power StationAmi Elazari

Millennium Electric T. O.U. Ltd.

P. O. Box 2646, Raanana 43650 Israel

Phone : 972-9-7439490 E-mail : Info@millenniumsolar. com Abstract

A new innovation technology includes construction of a Multi Solar Power Station using the Multi Solar (PV/T) Collectors System and a thermal (steam turbine) generator, using the excessive solar thermal energy produced by the Multi Solar System (MSS) which doubles the amount of electricity produced by the PVT Power Station while reducing the costs of the solar electricity produced to as low as under $3 USD per watt in certain countries.

The scientific basic principal of the MSS Co-Generation System is A built-in MSS that has the highest efficiency existing today – 85% (15% electricity, 35% hot water, 35% hot air or total 70% thermal energy)...

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Cost Optimization of Solar Chimney Power Conversion Units

T. P. Fluri1* and T. W. von Backstrom1

1 Department of Mechanical and Mechatronic Engineering
University of Stellenbosch, Private Bag X1, Matieland 7602, South Africa
* Corresponding Author, fluri@sun. ac. za

Abstract

Various layouts and configurations have been proposed for the power conversion unit (PCU) of solar chimney power plants. However, no method was available to make an informed decision on which layout/configuration to choose. The aim of this paper is to present such a method and apply it to several plant configurations. It is found that PCUs with a multiple horizontal axis turbine configuration using a single rotor layout with inlet guide vanes provide the lowest cost of electricity...

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Nanodiagnostics of Concentrator Solar Cells with Vertical p-n – Junctions for PV/T Systems

S. Gavrin 1, V. Simakin 2, S. Tyukhov 2, D. Strebkov3 I. Tyukhov2, 3

1 Nanocenter MPEI (TU), Energetichesky Proezd, 6, Moscow, 111 250 Russia

2 VEI, Krasnokazarmennaya, 12, Moscow, 111250, Russia

3 VIESH, 1st Veshnyakovski pr.2, Moscow, 109456, Russia

* Corresponding Author, itvukhov@yahoo. com

Abstract

This paper is devoted to the developing PV/T (photovoltaic /thermal) system based on the solar cells with vertical p-n-junctions and, more particularly, to nanodiagnostics of such solar cells...

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