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Polycrystalline Solar Panels Thermal Conversion Process

Oct 25, 2017

A sPolycrystalline Solar Panels is a device that responds to light and converts sunlight into electricity. There are many kinds of materials which can produce photovoltaic effect, such as: monocrystalline silicon, polysilicon, amorphous si, gallium arsenide, selenium and indium copper, etc. The principle of power generation is basically the same, and the process of light generation is described with crystalline silicon as an example. P-Type crystalline silicon can get N-type silicon 

doped phosphorus, forming N junction.When the light shines on the surface of the sPolycrystalline Solar Panels, some of the photons are absorbed by the silicon material; the energy of the photon is passed on to the silicon atom, which makes the electron jump, and becomes the free 

electron in the n junction to form the potential difference, when the external circuit is connected, under the action of the voltage, the current will flow through the external circuit to produce a certain output power. The essence of this process is: the process of converting photon energy into electricity.

Solar power generation Way solar power has two ways: one is light → heat → electricity conversion mode; the other is light 

→ electricity direct conversion.

(1) light → heat → electric conversion: Through the use of solar radiation generated by the thermal power generation, usually by the solar collectors will absorb the heat energy converted into refrigerant vapor, and then drive the turbine power generation. The previous process is the process of light → heat conversion, and the latter is a process of heat → 

electrical conversion, as with ordinary thermal power. The disadvantage of solar thermal power generation is that it is inefficient and costly.

(2) light → Electric Direct Conversion Mode: This method is the use of photoelectric effect, the solar radiation directly into electricity, light → electrical conversion of the basic device is sPolycrystalline Solar Panelss. A sPolycrystalline Solar Panels is a device that converts sunlight directly into electricity by the Yu Guangsheng Volt effect, a semiconductor photodiode, and when the sun shines on the photodiode, Photodiode converts the sun's energy into electricity and generates 

electricity. When many batteries are in series or in parallel, they can be used as a solar array with large output power.SPolycrystalline Solar Panels is a promising new power source, which has three advantages, such as permanence, cleanliness and flexibility. SPolycrystalline Solar Panelss long life, as long as the sun exists, sPolycrystalline Solar Panelss can be invested and long-term use; compared with thermal power, nuclear power generation, sPolycrystalline Solar Panelss will not 

cause environmental pollution; SPolycrystalline Solar Panelss can be large and small, large to kw medium-sized power stations, small to a single unit of sPolycrystalline Solar Panelss, This is unmatched by other power supplies.

Solar energy AC power generation system is composed of sPolycrystalline Solar Panels board, charge controller, inverter and accumulator, and the solar power system does not include inverter. In order to make the solar power system can provide enough power for the load, it is necessary to select each part rationally according to the power of the electric appliance. below to 100W output power, use 6 hours a day as an example, introduce the calculation method:

1, the first to calculate the daily consumption of Watts (including inverter loss): If the conversion efficiency of the inverter is 90%, then when the output power is 100W, the actual need for output power should be 100w/90%=111w; if 5 hours per day is used, the output power is 111w*5 hours =555WH.

2, the calculation of solar panels according to the daily effective daylight time for 6 hours, and then considering the charging efficiency and the loss during the charging process, the output power of the solar panel should be 555wh/6h/70%=130w. of which 70% is the charging process, the actual use of solar panels power.

Monocrystalline silicon solar photovoltaic conversion efficiency up to 24%, which is currently all kinds of sPolycrystalline Solar Panelss in the most efficient photoelectric conversion. But the production cost of monocrystalline silicon sPolycrystalline Solar Panelss is so large that it cannot be used widely and universally. Polysilicon sPolycrystalline Solar Panelss are cheaper than monocrystalline sPolycrystalline Solar Panelss in terms of production costs, but the photoelectric 

conversion efficiency of polycrystalline silicon sPolycrystalline Solar Panelss is much lower. In addition, the service life of polycrystalline silicon sPolycrystalline Solar Panelss is shorter than that of monocrystalline silicon. Therefore, from the performance price ratio, monocrystalline silicon sPolycrystalline Solar Panelss are slightly better.