Solar unit conversion, what is the form of solar energy conversion?

j=w*s(watt*s);

m: trillion 1m = 10 6;

m: milli1m = 10 -3;

1mj years = 1*10 6(w*s) years = 1000000 3600 Wh years = 1000 3600 365 kWh days, which is another unit commonly used in the solar field: "peak sunshine hours", 6000mJ = kWh days, which can also be said to be peak sunshine hours in hours. The average daily amount of sunlight is equivalent to the amount of radiation in a solar hour under the standard state (1000W).

mj is a unit of energy, while mw, mw is a unit of power and cannot be converted.

Suppose 1 year is 365 days, and 1 day is 24 hours, and 1 hour is 3600 seconds, so the MW per day is: mjyaar= mj/㎡.

For solar radiation, mj m2 is the unit of radiant energy per unit area and mw m2 is the unit of power generated per unit area, and the relationship between the two should be obtained by irradiation time. Different irradiation times and different power generation power can obtain different energy. If the power generated is 1 kW (1 MW is 1000 kW) and the effective sunshine time is 1 hour, the energy obtained is 1 kWh, which is converted into 860 kW in heat, which is converted into joules (kj) to be multiplied, that is, 1 kcal=, so that 1kWh = 860 kcal=.

According to this conversion principle, the relationship between MJ and MW can be obtained. For example, the 20MW photovoltaic power station built by Xuzhou Zhongneng in Xuzhou has an effective sunshine time of about 1,100 hours in 2011, so the power generation in 2011 is about 22,000,000kwh.

There are three main forms of solar energy utilization: photothermal conversion, photoelectric conversion, and photochemical conversion.

1. Photothermal conversion: Solar radiation energy is converted into heat energy through a conversion device, which belongs to solar thermal utilization technology, and then uses thermal energy to generate electricity, which is called solar thermal power generation.

It also belongs to this field of technology.

2. Photochemical conversion: including the electrolysis of water to produce hydrogen by electrolysis of semiconductor electrodes, and the use of calcium hydroxide or metal oxides.

thermal decomposition, energy storage, etc.

3. Photoelectric conversion: direct conversion and utilization of solar energy and electrical energy. Solar photoelectric power generation technology is used to convert solar radiation energy into electrical energy through a conversion device, and a photoelectric conversion device usually uses semiconductor devices.

The principle of photovoltaic effect is used for photoelectric conversion, so it is also called solar photovoltaic technology. This article mainly introduces solar photovoltaic power generation.

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Photothermal utilization

Its basic principle is to collect solar radiation energy and convert it into heat energy through interaction with matter. At present, there are four most widely used solar energy collection devices: flat plate collectors, vacuum tube collectors, ceramic solar collectors and focusing collectors (trough type, dish type and tower type).

Usually, according to the different temperatures and uses that can be achieved, solar thermal utilization is divided into low temperature utilization (<200), medium temperature utilization (200 800) and high temperature utilization (>800). At present, the main low-temperature utilization is solar water heaters.

Solar dryers, solar distillers, solar heating (solar rooms), solar greenhouses, solar air conditioning and refrigeration systems, etc., mainly solar cookers are used at medium temperature.

Solar thermal power generation concentrating heat collection devices, etc., high-temperature utilization mainly includes high-temperature solar furnaces.

The above content reference: Encyclopedia - solar energy.

There are three main forms of solar energy utilization: photothermal conversion, photoelectric conversion, and photochemical conversion.

1. Photothermal conversion: The solar radiation energy is converted into thermal energy through the conversion device, which belongs to the solar thermal utilization technology, and the reuse of thermal energy for power generation is called solar thermal power generation, which also belongs to this technical field.

2. Photochemical conversion: including the production of hydrogen by electrolysis of water by electrolysis of semiconductor electrodes, the use of calcium hydroxide or metal oxide thermal decomposition for energy storage, etc.

3. Photoelectric conversion: direct conversion and utilization of solar energy and electrical energy. The solar radiation energy is converted into electrical energy through the conversion device, which belongs to the solar photovoltaic power generation technology, and the photoelectric conversion device usually uses the photovoltaic effect principle of semiconductor devices for photoelectric conversion, so it is also called solar photovoltaic technology.

Utilization of solar energy

photovoltaic (solar cells, solar cells) power generation system, which converts solar energy into electricity;

Solar thermal power generation system, which uses the thermal energy of solar energy to generate electricity;

solar thermal utilization, such as solar water heating systems;

Solar central heating, solar air conditioning heating and cooling, solar buildings, etc. The future mobile energy application such as the "Solar Impulse" solar aircraft is the photovoltaic power generation system, and all the power and electricity of the aircraft's take-off, landing and flight come from the solar photovoltaic power generation system.

The solar water heating system efficiency that can be achieved in China's solar energy industry is about 33.

As far as the solar water heating system is concerned, the system efficiency is determined by five links: heat collection, heat transfer (heat exchange), heat control, heat storage, and heat consumption.

1. Heat collection link: The heat collector is the initial place where light energy is converted into heat energy. There are two types of collectors: tubular (vacuum tube, U-tube, heat pipe) and plate (flat plate).

2. Heat transfer (heat exchange) link: the process of transferring heat from the inside of the collector through the fluid and transferring the heat to the energy storage body under the transportation of the pipeline. The heat transmission link is mainly composed of collector flow channel, circulation pipeline, heat exchanger and circulating pump.

3. Heat control: When the temperature difference between the collector and the hot water storage tank reaches the set starting conditions (5 10° adjustable), the circulating pump starts. This is the most commonly used thermocyclic mode.

First, the conversion efficiency of solar water heaters;

The inclination angle of the water heater, that is, the angle between the heating surface and the horizontal plane of the water heater. The area of the heating surface of the solar water heater.

Solar radiation intensity, i.e., the amount of solar radiation energy obtained per unit time on a surface per unit area.

The angle at which the sun's rays meet the ground plane, i.e., the elevation angle of the sun at the local level. Local geographic latitude.

The latitude of the point where the sun shines directly. Solar water heater thermal efficiency.

Second, first test the output voltage and current of the tested solar panel under standard light intensity

1. Standard light intensity refers to:

1000w square meters, module temperature: 25 degrees, it is best to test with a special tester for solar PV.

2.Parameters to test:

pw,vop,iop,voc,isc.

3.Divide the power of the solar panel by the area of the solar panel and divide by 1000 to get the efficiency.

Suppose: the power of the solar panel is 5W, and the area is: square meters, then its efficiency is: 5, that is, it will be 1000W square meters

The energy of sunlight is converted into electricity.

Dear users, solar and gas water heaters are two different ways of hot water**, and their conversion needs to consider many factors. First, if you want to switch from solar to a gas water heater, you need to install a gas water heater and connect it to the gas pipes in your home. In addition, you will also need to separate the pipes of your solar water heater from the pipes of your gas water heater to ensure that the hot water can flow to the right equipment.

Second, if you want to switch from a gas heat water destroyer to solar power, you need to install a solar water heater and connect it to the water pipes in your home. In addition, you will need to separate the pipes of the gas water heater from the pipes of the solar water heater to ensure that the hot water can flow to the correct equipment. Whichever conversion method you choose, there are a few factors to consider:

1.Installation location: Solar water heaters need to be installed in a sunny place, while gas water heaters need to be installed in a well-ventilated area.

2.Energy costs: Solar water heaters come from the sun and require no additional cost, whereas gas water heaters consume gas and need to pay an additional fee.

3.Hot water** amount: The amount of hot water** for solar water heaters depends on the amount of sunlight, while gas water heaters can be used to change the amount of hot water at any time.

In summary, there are many factors to consider when converting solar and gas water heaters, including installation location, energy costs, and the amount of hot water**. If you need more detailed information, please consult a professional installer or after-sales service personnel.

The conversion forms of solar energy include photothermal conversion, photoelectric conversion, and photochemical conversion. Solar thermal utilization technology converts heat energy into heat energy through various heat collector components and is directly utilized. It can be divided into low temperature (100°C-300°C), industrial heat, refrigeration, air conditioning, cooking, etc.; High temperature (above 300°C), thermal power generation, high temperature treatment of materials, etc.

Solar thermal power generation technology is the process of using solar energy to generate heat energy and then convert it into mechanical energy. The power generation system is mainly composed of a heat collection system, a heat transfer system, a heat accumulator, a heat exchanger and a steam turbine generator system.

Solar photoelectric conversion technology: Sunlight irradiates on the semiconductor junction with a diffusion structure type, generating electron-hole pairs, and the electron-hole pairs generated inside the semiconductor that are not recombined are attracted by the internal electric field, and the electrons flow into the A region, and the holes flow into the B region, so that the A and B regions generate electromotive force, and if the load is connected externally, the electric energy can be output.

There are many types of solar cells, such as monocrystalline silicon cells, polycrystalline silicon cells, amorphous silicon cells, cadmium sulfide batteries, zinc arsenide batteries, etc., which are made using this principle.

Photochemical Conversion TechnologyPhotochemistry is a branch of chemistry that studies the chemical reactions caused by the interaction between light and matter. A photochemical cell is a battery that uses light to irradiate the interface between the semiconductor and the electrolyte, and a chemical reaction occurs to form an electric current in the electrolyte and ionize water to directly produce hydrogen.

Solar energy can be converted into ().

a.The wind serves the mountain late.

b.Nuclear energy. c.Tidal energy.

d.Biology Lao Li Neng.

Correct Answer: Vigo ACD