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What are the influencing factors of photovoltaic cells and what are their application fields?
The factors affected by photovoltaic cells are temperature and light intensity. In addition, the application fields of photovoltaic cells include user solar power, transportation, petroleum, marine and meteorological fields, etc. They can also be used in household lighting power supplies and photovoltaic power stations. Next, I will introduce the detailed content to you.
1. Factors affecting photovoltaic cell output
1. Effect of temperature on the output characteristics of photovoltaic cells and components
As we all know, when the temperature of photovoltaic cells and components is high, the working efficiency decreases. As the temperature of the photovoltaic cell increases, the open circuit voltage decreases. In the range of 20-100 degrees Celsius, the voltage of the photovoltaic cell decreases by about 2mV for every 1 degree Celsius increase. The photocurrent increases slightly with the increase of temperature, about every 1 degree Celsius. The photocurrent of the battery increases by one thousandth when the temperature rises by 1 degree Celsius. In general, for every 1 degree Celsius increase in temperature, power is reduced by 0.35%. This is the basic concept of temperature coefficient. Different photovoltaic cells have different temperature coefficients, so the temperature coefficient is one of the criteria for judging the performance of photovoltaic cells.
2. Effect of light intensity on the output characteristics of photovoltaic cell modules
Light intensity is proportional to the photocurrent of photovoltaic cells and components. Within the range of light intensity from 100 to 1000 watts per square meter, the photocurrent always increases linearly with the increase of light intensity; while light intensity has little effect on voltage, and changes in temperature Under fixed conditions, when the light intensity changes within the range of 400-1000 watts per square meter, the open circuit voltage of photovoltaic cells and modules remains basically unchanged. Therefore, the power of photovoltaic cells is basically proportional to the light intensity.
2. Application fields of photovoltaic cells
1. User solar power supply
Small power supplies ranging from 10-100W are used in remote areas without electricity, such as plateaus, islands, pastoral areas, border posts and other military and civilian life needs, such as lighting, TVs, radios, etc.
2. Transportation field
Such as navigation beacon lights, traffic/railway signal lights, traffic warning/sign lights, street lights, high-altitude obstacle lights, highway/railway wireless phone booths, unattended road shift power supply, etc.
3. Communication/communication field
Solar unattended microwave relay station, optical cable maintenance station, broadcast/communication/paging power supply system; rural carrier telephone photovoltaic system, small communication machine, soldier GPS power supply, etc.
4. Petroleum, ocean, and meteorological fields
Petroleum pipelines and reservoir gate cathodic protection solar power systems, oil drilling platform life and emergency power supplies, ocean detection equipment, meteorological/hydrological observation equipment, etc.
5. Home lighting power supply
Such as garden lights, street lights, portable lights, camping lights, mountain climbing lights, fishing lights, black light lights, rubber tapping lights, energy-saving lamps, etc.
6. Photovoltaic power station
10KW-50MW independent photovoltaic power stations, wind and solar (diesel) complementary power stations, various large parking plant charging stations, etc.
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