#METAL GRIDS INSTALL#
#METAL GRIDS SERIES#

You may also want to think about how all these metal thefts are not the only thefts that happen in the construction industry, people also steal bricks.

#METAL GRIDS INSTALL#

In fact you may have enough money left over to install some stadium seating as well. It will also leave you some extra cash to install that home theater with surround sound you’ve always wished for. There are some huge benefits here in terms of cost, maintenance, and the attractiveness of what it may look like. So now when the wife tells you that she wants a beautiful cobblestone driveway you can go ahead and spend a fraction of the cost without her even being aware. It does look like incredible craftsmanship for sure.Īpparently you can take regular asphalt, then heat it up and put a metal grid on it to make it appear like bricks were used for that walkway, driveway, or road. Take a look at that beautiful brick crosswalk above, and you may think that an expensive mason may have come in to do the work when in fact you are looking at asphalt. Well, maybe it isn’t similar but it’s along the same lines. I was talking about an idea and BOOM someone this very morning writes about a similar idea. I find it really coincidental that a week ago Last week I talked about why we do not have metal bricks or blocks and voila this morning I read a story about metal grids being put on hot asphalt that make it look like bricks were used. I wonder if this idea is actually pushing forward or not.

8.Another classic post that did bring up some discussion last year at this time.

Mismatch for Cells Connected in Parallel.

#METAL GRIDS SERIES#

Impact of Both Series and Shunt Resistance.Applying the Basic Equations to a PN Junction.Solar Radiation Outside the Earth's Atmosphere.Serreze, “ Optimizing Solar Cell Performance by Simultaneous Consideration of Grid Pattern Design and Interconnect Configurations”, 13th IEEE Photovoltaic Specialists Conference. Schematic of a top contact design showing busbars and fingers 1.Ī program for designing and developing the front surface grid pattern is available at the PV Lighthouse Metal Grid Calculator the smaller the unit cell, the smaller finger width, W F , and the smaller the finger spacings, S, the lower the losses.a tapered busbar has lower losses than a busbar of constant width and.the optimum width of the busbar, W B, occurs when the resistive loss in the busbar equals its shadowing loss.A symmetrical contacting scheme can be broken down into unit cells and several broad design rules can be determined. While a multitude of top contacting schemes exist, for practical reasons most top surface metalization patterns are relatively simple and highly symmetrical. For identical transparencies, a narrow line-width technology can have closer finger spacing, thus reducing the emitter resistance losses. An important practical limitation is the minimum linewidth associated with a particular metalization technology. The transparency is determined by the width of the metal lines on the surface and on the spacing of the metal lines.

The shading losses are determined by the transparency of the top surface, which, for a planar top surface, is defined as the fraction of the top surface covered by metal. Shading losses are caused by the presence of metal on the top surface of the solar cell which prevents light from entering the solar cell. A low resistivity and a high metal height-to-width aspect ratio are desirable in solar cells, but in practice are limited by the fabrication technology used to make the solar cell. The grid resistance is determined by the resistivity of the metal used to make the metal contact, the pattern of the metalization and the aspect ratio of the metalization scheme. As shown in the Emitter Resistance page, the power loss from the emitter depends on the cube of the line spacing, and therefore a short distance between the fingers is desirable for a low emitter resistance. Impact of Finger Spacing on Emitter ResistanceĪn important factor in top contact design is that of resistive losses in the emitter. Key features of a top surface contacting scheme.

The critical features of the top contact design which determine the magnitude of these losses are the finger and busbar spacing, the metal height-to-width aspect ratio, the minimum metal line width and the resistivity of the metal. These include resistive losses in the emitter, resistive losses in the metal top contact and shading losses. The design of the top contact involves not only the minimization of the finger and busbar resistance, but the overall reduction of losses associated with the top contact.

Metal grids