Germany R & D of solar photovoltaic modules real-time monitoring of new technologies

Although solar photovoltaic modules have been rigorously tested in the production process, they are still inevitably damaged during transportation, installation and operation, such as cracked or damaged solar panels and the like. Failure to replace them in time will greatly reduce the system efficiency , And even cause system failure.

Current monitoring methods include thermal imaging and (field) excitation luminescence detection, but each has significant application constraints. Thermal imaging can only be used in daylight with an energy density of more than 700 W / m2 Conditions, and field-excited luminescence detection technology can only be used at night under low light conditions.

The Institute of Photovoltaics at the University of Stuttgart, Germany, has partnered with companies to develop a new monitoring technology called DaySy, a new technology that enables real-time monitoring of solar photovoltaic devices by measuring the field excitation luminescence and photoexcitation luminescence intensity of solar photovoltaic modules Of the state of the work in 30 seconds to obtain monitoring results to determine the solar PV modules are intact and can identify common types of failures, such as the fall of the wires between the solar panels, the plate surface cracks, the panel appears photoelectric conversion failure The site, etc., has a wide range of applications.

Die Casting

The Die Castings that are created in this process can vary greatly in size and weight, ranging from a couple ounces to 100 pounds. One common application of die cast parts are housings - thin-walled enclosures, often requiring many ribs and bosses on the interior. Metal housings for a variety of appliances and equipment are often die cast. Several automobile components are also manufactured using die casting, including pistons, cylinder heads, and engine blocks. Other common die cast parts include propellers, gears, bushings, pumps, and Valves.

Die casting is a manufacturing process that can produce geometrically complex metal parts through the use of reusable molds, called dies. The die casting process involves the use of a furnace, metal, die casting machine, and die. The metal, typically a non-ferrous alloy such as aluminum or zinc, is melted in the furnace and then injected into the dies in the die casting machine. There are two main types of die casting machines - hot chamber machines (used for alloys with low melting temperatures, such as zinc) and cold chamber machines (used for alloys with high melting temperatures, such as aluminum). The differences between these machines will be detailed in the sections on equipment and tooling. However, in both machines, after the molten metal is injected into the dies, it rapidly cools and solidifies into the final part, called the casting. The steps in this process are described in greater detail in the next section.


Die cast parts can vary greatly in size and therefore require these measures to cover a very large range. As a result, die casting machines are designed to each accommodate a small range of this larger spectrum of values. Sample specifications for several different hot chamber and cold chamber die casting machines are given below.

The selection of a material for die casting is based upon several factors including the density, melting point, strength, corrosion resistance, and cost. The material may also affect the part design. For example, the use of zinc, which is a highly ductile metal, can allow for thinner walls and a better surface finish than many other alloys. The material not only determines the properties of the final casting, but also impacts the machine and tooling. Materials with low melting temperatures, such as zinc alloys, can be die cast in a hot chamber machine. However, materials with a higher melting temperature, such as aluminum and copper alloys, require the use of cold chamber machine. The melting temperature also affects the tooling, as a higher temperature will have a greater adverse effect on the life of the dies.

Die Casting,Aluminum Die Casting,Die Casting Parts,Zinc Die Casting

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