English 
English 
Views: 6 Author: Site Editor Publish Time: 2019-08-28 Origin: Site
Since the formation of organisms from the earth, it mainly relies on the heat and light provided by the sun. Since ancient times, humans have also been able to dry the objects and use them as methods for preserving food, such as salt and sun-dried food. Under the reduction of fossil fuels, people intend to further develop solar energy. The use of solar energy has two methods of passively utilizing photothermal conversion and photoelectric conversion, namely solar thermal utilization and solar power generation. Solar energy in a broad sense is a source of many energy on Earth, such as wind energy, chemical energy, and potential energy of water.
Only the photothermal conversion is introduced here. The typical products of light-to-heat conversion are solar collectors, various water heaters extending from vacuum tubes to flat-panel solar energy, and so on. The purpose is one, how to get more heat to meet the needs of various users, the current photothermal technology has been very mature. However, the use of light and heat is also constantly expanding, from hot water to heating, drying, planting, breeding and many other fields. As we all know, solar energy is a clean, cheap and safe energy source, and hopes to use this energy to replace coal, oil, natural gas and so on. However, due to natural conditions, there are also short plates for the use of solar energy. The current compensation measures are combined with electric auxiliary heating or heat pump technology. A lot of heating and hot water is used in large quantities, and it is also a very effective energy saving measure. However, if you can rely solely on the heat of solar energy to meet the use, it is naturally more environmentally friendly and energy efficient.
In fact, the use of solar energy to meet the needs of human production and life is only one step away, that is, how to store the summer solar energy for winter use! After realizing the inter-season energy storage, solar energy can be fully utilized for heating, hot water supply, greenhouse cultivation, and breeding. In fact, the application of solar energy has achieved energy storage, but the energy stored is limited.
Taking greenhouses as an example, the most critical factors for agricultural production are light and heat. No fertilizer, pesticides or hormones are useless. Therefore, the greenhouse has become synonymous with high yield. The greenhouse can make more use of the solar heat of photosynthesis, and the production of early spring and late autumn can be increased in advance and delay; the ordinary greenhouse can not meet the production demand in the cold winter. People began to design insulated greenhouses and moved the building heating scheme into the greenhouse, effectively improving the temperature conditions in the greenhouse.The data and economic benefits of using only solar energy storage to obtain thermal energy in a 1000 greenhouse are as follows:
1. The solar collector produces 1 ton of hot water at 80° C a day, the total heat is 80,000 kcal, and the equivalent electric power is about 93 kWh.
2. Thermal power generation 93kW.h needs to consume coal: 93×0.3=27.9kg, and emit about 237 cubic meters of carbon dioxide gas.
3. The greenhouse of 1 thousand square meters is equipped with 10 tons of solar collectors, and the heat output per day is about 930 kWh.
4. Receive solar heat per day to convert 279kg of coal and reduce carbon dioxide emissions by 2,370 cubic meters.
5. Calculated in 20 days per month, 240 days in the year, receiving solar heat of about 223,512 kWh.
6. The annual receiving solar thermal energy is equivalent to 66,960 kg of coal, reducing carbon dioxide gas emissions by 569,160 cubic meters.
7. According to the electricity calculation, the direct economic benefit is 223512×0.5=111756 yuan.
8. The solar energy storage cost is about 20,000 yuan / ton, and the greenhouse of only one thousand square meters is only solar collectors and energy storage is about 200,000 yuan.
1. The greenhouse heating time is determined to be 150 days, 223512 ÷ 150 = 1490 kW / day.
2. The daily output of heating for 10 hours and square meters is about 149w, which can meet the demand of greenhouse energy.
1. The geometry of the dish is 45 cm long, 25 cm wide and 13 cm high.
2. According to this size, 8 square meters can be placed in the square meter, and the greenhouse can be placed at 6,400 basins according to the utilization rate of 80%.
3. Adopting nutrient substrate seedling transplanting and planting, producing leafy vegetables for 15 days and a production cycle, producing 12,800 pots per month.
4. The organic vegetable produced by this nutrient substrate is 50 yuan/pot, and the monthly output value is 640,000 yuan.
5. Annual output of 10 months total output value of 6.4 million yuan
The above data shows that it is very economical to achieve controllable greenhouse temperature throughout the year. The use of solar energy trans-storage technology in a thousand square meters of greenhouses saves about 66.9 tons of coal and reduces carbon dioxide emissions by about 569,160 cubic meters per year. The economic and environmental benefits brought by the application of solar energy inter-season energy storage technology are not realized by coal, oil and natural gas. This is only based on the economic value described in the production of common organic vegetables, and the value of growing cash crops is higher. As long as the temperature, water and fertilizer are controlled, the required yield and quality can be obtained.
The solar energy storage greenhouse is a model to show the solar energy storage technology in the inter-season. The energy storage, temperature control, thermal insulation performance, ventilation and ventilation, lighting, and collector layout of the greenhouse are all perfect and can be better displayed. The application value of solar energy storage across the season. The current energy crisis, food crisis, and environmental pollution crisis that humans face can be alleviated by the innovation of solar energy storage across the season.
Solar energy inter-season energy storage is also ideal for building heating and hot water supply. It only needs to set the energy storage according to the demand to meet the needs of annual heating and hot water supply. The same age as the building. The adjustment and replacement of solar collectors is also very simple, safe and reliable without any hidden dangers.
According to the calorific value of 1 ton of hot water of 80 °C per day, the investment of kilowatts is about 215 yuan, calculated according to 0.5 yuan of kilowatt hours, and the cost is recovered in 430 days. Greenhouse organic vegetables can be recovered in half a year.
All in all, solar energy is everywhere, and energy storage can be achieved anywhere in the world. Whether it is the plateau, the island, or the desert, it is not restricted by the environment, and the energy needed can be obtained everywhere. Many border guards are located in the alpine mountainous areas and remote islands. Heating, hot water supply, and eating organic vegetables cannot be solved at all. Solar energy cross-season energy storage technology can easily solve these problems that cannot be solved for many years.
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