On rainy days, there is no direct sunlight, and there is also diffusion. It will be warm, but the heat will not be as high as the water temperature on sunny days.
It is difficult for ordinary water heaters to meet the bathing conditions on cloudy and rainy days. So there is a combination of solar energy and other energy sources, such as electric heating, gas and oil boilers, etc. The problem of not being hot on cloudy and rainy days has also promoted technical research on heat collection, heat pipes and sonic heat exchange whether it is cloudy or not, haha, for me. notice, please refer to it.
The photovoltaic power generation system can produce electricity on rainy days.
It's just that the system's electricity production is “reduced” compared to that on sunny days. Currently, the productionElectricity generation that we generally refer to is an average value, that is, electricity production that takes into account rainy weather. This phenomenon has already been taken into account in the economic model of the photovoltaic system.
The working principle of solar photovoltaic power generation:
Sunlight shines on the p-n junction of the semiconductor to form new hole-electron pairs under the action of the integrated electric field of the semiconductor. p-n junction, holes Electrons flow from region n to region p and electrons flow from region p to region n When the circuit is connected, a current is formed. This is how photovoltaic solar cells work.
There are two solar power generation methods: one is the light-heat-electricity conversion method and the other is the direct light-electricity conversion method.
1. The light-heat-electricity conversion method uses thermal energy generated by solar radiation to produce electricity. Generally, a solar collector converts the absorbed thermal energy into steam as the working fluid, and then drives a working fluid. steam turbine to produce electricity. The first process is a light-heat conversion process; the second process is a heat-to-electricity conversion process, which is the same as ordinary thermal power generation.
2. Direct light-to-electricity conversion method This method uses the photovoltaic effect to directly convert solar radiation energy into electrical energy. The basic device for converting light into electricity is the solar cell. A solar cell is a device that directly converts solar energy into electrical energy through the photovoltaic effect. When the sun brilled on the photodiode, the photodiode converts light energy from the sun into electrical energy, producing current.
Detailed information:
How to make solar photovoltaic power generation stable even rainy days:
1. Reasonable clothing for women.
Installation cannot be carried out lightly. The orientation of the power plant installation process should be towards the south. As the name suggests, the power plant faces south, so that it can receive full illumination from the sun. The installation angle is theoretically equal to or close to the local latitude, and the layout and spacing should be determined based on the local insolation and the dimensions of the roof structure.
2. Choose good equipment.
Equipment components, inverters, supports here.
Inverter manufacturers grand public basically have IP65 protection level and waterproof performance, but long-term rainy weather still has a great impact on the equipment. If the selected photovoltaic products do not withstand prolonged rain, electricity generation simply cannot come.
Baidu Encyclopedia - Photovoltaic solar energy production