The content of future generations is divided by the output analysis. The analysis of t-benefits is carried out. The cost of the operating period is 14.71 years for the button year; the present value of money; the ancient Shuyi kè’º has introduced the first vacuum tube solar energy in 1996. Since the water heater, through technological transformation, and attracted Tsinghua University patent product QBP47-1.2, QBP47-1.5 type vacuum tube. After trials and demonstrations, the company has entered the promotion stage and has launched the "Red Sun" solar water heater brand. Constantly discovering and solving problems during the application process will make the technology more mature. Through feasibility study, it has a positive role in promoting the improvement of the agricultural ecological environment and improving the quality of rural life. Therefore, it has broad prospects for development.
Since the implementation of the "8th Five-Year Plan" for the comprehensive construction of rural energy in the country, the city's energy and ecological construction has made considerable progress. In particular, it was listed as a provincial-level eco-agricultural pilot city in 1997, which has lifted the city's agricultural ecological construction to another level. New steps. Among them, the solar water heater test, production, technical innovation, demonstration, promotion, has made breakthrough development, reaching the leading level in the province.
The Panshi Environmental Protection Station introduced the first “Huangming†solar water heater as early as 1996, and in 1998 it introduced the patented QBP47-1.2 and QBP47-1.5 vacuum tubes of the Huahua University. Through trials, and a number of technological transformations, it has now begun to promote the basis, and built a "Red Day" solar water heaters Co., Ltd., launched the "Red Day" brand vacuum tube solar water heaters. A number of technical breakthroughs and transformations have been carried out. The first is the application of a new type of polyurethane thermal insulation material to thicken the thickness of the water tank insulation layer (thickness 12cm), to achieve the effect of not having to drain water during the night in winter, and to develop intermittent arcs. Diffusion plate, thermal efficiency increased by more than 8%, and with snow function; third is the use of siphon theory, developed a gas-liquid separation device and a negative pressure device to replace the solenoid valve, to achieve no power, safe and reliable operation, and not Affected by water stoppages. "Red Sun" series products currently have 12 tubes, 16 tubes, 20 tubes and other specifications, and can install hot water supply systems.
762 units have been promoted, including 582 in the urban area, 120 in townships, and 60 in other areas. By distributing technical data to users, it avoids the phenomenon of cracking in the hot layer caused by solar radiation that floods the water heater during the day and implements high-quality after-sales services. The majority of users are very satisfied.
Jilin Province ranks No. 3 in the five major solar energy regions of the country, and its solar energy resources are moderately rich, which has the advantage of exploiting solar energy resources. The annual total solar radiation of Panshi City 1: 4.9xl6K/m2, equivalent to 168.6kg standard coal.
-1.2 type vacuum tube length 1200mm, QBP47-1.5 type vacuum tube length 1500mm, the use of sputtering gradient molybdenum - nitrogen / selective absorption deep layer, the life of 15 years; outer diameter of 47mm, inner diameter of 37mm, wall thickness of 1.6mm, single The effective heat collection area of ​​the pipe is 0.122m2, and the light-to-heat conversion efficiency is 80%; the annual effective heat supply for a single heat pipe in our city is 16.46kg standard coal, which is equivalent to 41.15KWh of electric energy. For example, the single unit cost is 1390yuan. The annual energy-saving benefit is +14.4 yuan (calculated according to the electricity price of 0.35 yuan), and the single-year energy-saving benefit is 172.83 yuan.
Alternative prices, taking into account the time value of funds, using the World Bank's scientific evaluation methods for project inspections, conducted economic feasibility studies on solar water heaters.
12 heat collection tubes, solar hot water, and light energy appraisal table Unit: 100% barley noodles with white yield More than 61% barley Made from 4% or more of barley flour, added at 10% to 50% wheat flour and buckwheat flour The resulting cellulose surface has a smooth texture, a good taste, and a long shelf life.
Non-fat corn embryo noodles produce 10% 30% defatted corn germ flour in hard wheat flour to produce noodles, which can raise nutrients, especially protein content, improve the combination of amino acids, increase the bio price, and make noodles resistant to cooking and hardness. increase.
The active yeast noodles extract mushrooms with hot water and add mushroom juice. Add 1% 10% sugar and no more than 10% salt. Heat and sterilize and cool to 30°. Add yeast or brewer's yeast to obtain active yeast liquid. It is added to the dough to make noodles with good stickiness, toughness and flavor.
Nutrition-enhanced noodles add a variety of vitamins and natural shell or eggshell powder in noodle raw materials, and add wheat gluten, deodorized whole fat bean powder, egg powder or potato starch, and become nutritious, elastic and stretchable nutrition. Strong noodles.
Seaweed noodles are made with seaweed such as wakame, hijiki, seaweed or kelp in wheat flour to make them rich in VB! Nutrients such as chlorophyll, carotene, minerals, sulphur, VA, VC, calcium, iron, etc., have become unique seaweed noodles with distinctive flavor and color. It is an ideal food for dieters and children.
Canned Noodle for Traveling Canned Noodles A metal oxide generator is installed at the end of the can of the canned tin. Simply put the can in water before eating, and it will produce a lot of heat energy to boil in 5 minutes. The wall insulation material can be held in the hands and placed on the table. It is very convenient for tourists to carry and eat.
The flavored fried instant noodles are coated on the cooked surface with grease, water-soluble flavoring liquid and sesame oil. Under the conditions of 65t~75T, the microwave vacuum drying treatment is performed for 2 minutes and 6 minutes, and then the dried noodles are made. The product is easy to be preserved and is not easily oxidized and deteriorated. It is eugenic and easy to carry.
Multi-layer fast food noodles are added with salt, alkaline water, and noodle conditioner in wheat flour, and 0.5 cmml cm thick pasta is prepared as the outer layer; starch and wheat flour are mixed and water is added to make the same 0,5cm~lcm thick Face sheets are used as inner layers; they are rolled together and cut into multi-layer noodles for sale. The noodle has good looseness when cooked, does not stick, and tastes soft, smooth, elastic and the like.
High-protein buckwheat noodles Soybeans are decomposed of soybean protein with alkaline protease, then oiled 10% 20% and water 7 to 9 times to prepare emulsion, and then spray-dried into powder, and add 5% 20% of the powder in buckwheat flour Mix it evenly, making it a good buckwheat flour with a good taste and taste.
The quality instant boiled noodles are made of wheat flour, mixed with potato or corn starch, salt, vegetable protein, egg, and water, and made into dough. Rolled with a roller mill and pressed to a certain thickness, and then cut and cooked. Dry fried deep-fried noodles. The finished product is delicate in texture, transparent in appearance, flexible in texture, soft in texture, and good in flavor. The soup is not turbid.
Meat noodles using high-quality meat, according to the total weight of about 70% stir into a meat paste, plus people dry wheat flour or starch 15% and the amount of quail essence, seasonings, etc., mixed in 12T: mix and squeeze into noodle-like, immersed people Soak in hot water for 30 seconds and 60 seconds, remove the heat and solidify. When eating, just put a little hot water and cook it. Light and delicious, especially suitable for summer appetizers.
The grapefruit skin noodles are added to the wheat flour with crushed fresh grapefruit skin powder, salt, seasoning and water. The bitterness is removed and then the salt and water are added to make the grapefruit bitter, delicious, strong noodles, and can prevent oxidation, and can be long-term Preserved grapefruit skin noodles. There is a good fire temperature appetizer.
(Kong Fanzheng, Lanzhou City, Gansu Province, No. 31, box 16 boxes, 730000, water heater life of 15 years; NPV = 10, greater than 1; IRR = 10.18%, greater than the social discount rate i = 10%, the project is feasible.
3. Benefit analysis and its role in the sustainable development of agriculture There are 762 water heaters, a total of 15,000 heat pipes, a total heat collection area of ​​1830 m, and a total investment of 1.524 million yuan, which can form an annual economic efficiency of 216,000.
A total of 246.9 tons of standard coal can be formed per year, equivalent to 617,200 KWh of electricity, or walking on the Lai Road is equivalent to saving 432.4 tons of fuel wood, or equivalent to saving 532.1 tons of straw.
The application of water heaters can improve the health environment of residents, improve the quality of life, and is conducive to physical and mental health. A 12-pipe water heater can provide hot water every day (40 people can use 35 people, and the current population of “Red Sun†solar water heaters has benefited more than 2,000 people. .
Application of vacuum tube solar water heaters in the sustainable development of agriculture can not only achieve obvious economic, energy and social benefits, but also play a decisive role in the sustainable development of agriculture, which is mainly reflected in the ecological environment benefits. The development and application of solar energy can save commodity energy, reduce the emission of greenhouse gases and dust, improve the quality of the atmosphere, and mitigate the “greenhouse effectâ€; saving firewood can protect forest vegetation and reduce the degree of soil erosion; saving straw can promote the development of animal husbandry , To achieve straw return to the field or directly to the field, and improve farmland ecology. The above analysis shows that the application of vacuum tube solar water heater can improve the agricultural ecological environment, maintain the balance of agricultural ecology, and achieve the sustainable development of agriculture.
(Tian Baodong, Duan Sensen, Li Yan, Ren Xiwu, Zhangshi City Agricultural Environmental Protection Station
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