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Lighting the calculators can always seem to work it. You may have seen larger solar companies in Pakistan. Emergency traffic signs, public telephone booths, parking lots and even buoy the power can see this indicator panels. Despite these large Solar Panels not as the common calculator, but they do exist, if you know the appropriate location, would be very easy to find them. Solar companies in Pakistan is also mounted on satellites for its power supply. In the past 20 years, you may have heard the “solar revolution” this statement – tells of a day we’ll all use to get free electricity from the sun. This is a seductive promise: On a clear, sunny day, the radiation energy of the sun to the Earth’s surface is about 1,000 watts per square meter, if we could gather together all these energies, can easily and residential office provides free electricity. Solar panels or solar panel energy said solar cell.
Definition: consists of several solar cells assembled in a certain way on a board
Solar Panels – Power principle
Solar power generation solar power in two ways, one is light – heat – electricity conversion mode, the other is light – electric direct conversion method.
- Light – heat – electricity conversion mode through the use of thermal power generated by solar radiation, usually from the solar collectors to heat absorbed by the working fluid is converted into steam, and then drive steam turbine power generation. Before a process is light – thermal conversion process; after a process is heat – electricity conversion process.
- Light – electric direct conversion is the use of the photoelectric effect, the direct conversion of solar radiation into electrical energy, light. The basic unit is a solar cell power conversion. Since the solar cell is a photovoltaic effect and solar energy in Pakistan directly into electrical energy device, a semiconductor photodiode, when the sunlight to the photodiode, the photodiode will be the sun’s light energy into electrical energy generated current. When the number of batteries connected in series or parallel can become a relatively large output power of the PV array.
Solar Panels Composition and Function
At present, crystalline silicon material (including polysilicon and monocrystalline silicon) is the most important photovoltaic materials, its market share above 90%, and in the future for a long period of time would still be the mainstream of the solar cell material. Polysilicon material production technology have long held in the United States, Japan, Germany and other countries 3 7 the hands of the company’s 10 factories, forming technology blockade, state of the market monopoly. Polysilicon demand mainly from semiconductors and solar cells. According to the purity requirements are different, divided into electronic and solar grade level. Where in the means for electronic grade polysilicon accounted for about 55 per cent, 45 per cent of solar grade polysilicon, with the rapid development of photovoltaic industry, the solar cell to higher than the growth rate of demand for polycrystalline silicon semiconductor polysilicon development, estimated that by 2008 solar polysilicon demand will exceed electronic grade Polysilicon. In 1994 the world’s total production of Solar Cells is only 69MW, while 2004 will be close to 1200MW, in just 10 years, it increased by 17 times. Experts predict the solar photovoltaic industry before the second half of the twenty-first century will be over nuclear power has become one of the most important basic energy.
Solar Plate and the part of the function:
- Glass: its role is to protect the main power (battery slice), light which is required for the selection. The light transmittance must be high (generally 91% or more);
- Ultra-white steel processing.
EVA for bonding fixed glass body and power generation (solar cells), transparent EVA material directly affect the life of components exposed EVA in the air easily aging yellow, thus affecting the light transmission assembly rate, which affect the quality of power components in addition to the EVA itself, the quality, the laminating process on the component manufacturers is very large, such as the degree of non-compliance EVA glue, EVA, and glass, back bonding strength is not enough, will cause EVA premature aging, affecting component life.
- Cells: The main function is to generate electricity, the electricity main market is the mainstream crystalline silicon solar cell film, thin film Solar Cells, and both have their advantages and disadvantages. Crystalline silicon solar cells, the equipment cost is relatively low, but consumption is high and the cost of solar cells, but the photoelectric conversion efficiency is high, outdoors under the sun power is more appropriate. Thin film Solar Cells, relatively high equipment costs, but the battery consumption and low cost, but more than half of the photoelectric conversion efficiency relative point of crystalline silicon cells, but the low-light effect are very good, in ordinary light can also generate electricity, such as the calculator the solar cells.
- Back: action, sealing, insulation, waterproofing. Usually, with TPT, TPE and other materials must be resistant to aging, most of the components manufacturers have the warranty for 25 years, tempered glass, and aluminum is generally no problem, the key in the back and whether silicone can meet the requirements.
- Aluminum: protection laminate, play a seal, supporting role.
- Junction Box: protect the entire power generation system, play a role in the current transfer station, a short circuit if the component junction box automatically disconnects the short-circuit the battery string, to prevent the entire system junction box burned most critical diode selection, according to internal components different types of cells, and the corresponding diode is not the same.
- Silicone: seal, for sealing components and aluminum frame, junction box and wiring components Some companies use double-sided tape, foam instead of silicone, domestic widespread use of silica gel, the process is simple, convenient, easy to operate, and the cost is very low.