The Application of Hybrid Photovoltaic-Wind Power Generation

Wind Solar Power System is the source of all the energy on earth，Wind energy is another form of expression in the Earth's surface. Wind and solar energy have low energy density, the stability is weaknesses, and they are influence by geographical distribution, seasonal changes, day and night alternation. However, Solar and wind energy have Complementary in time and geographical. And the most sunlight during the day, thewind less, the evening sun, the light is very weak, but the surface’ temperature of earth has changed and wind to strengthen large. In summer, Sunlight is strength and wind is small. In winter, sunlight is weak and wind is strength. Stable is reliable solar power generation, but it has higher costs now. And wind power costs are lower, but random, and reliable power supply is poor. Day and night achieve power generation resources in the conditions of the suitable weather, wind / photovoltaic generating system can be complementary to each other to improve the continuity of electricity supply systems, stability and reliability if we can get them together. Therefore, the wind / PV hybrid generating system is the best resources of independent power system, in many areas has been widely used. Solar photovoltaic systems have many factors to effect. the complexity of the design not only to achieve both long-term reliability to meet the needs of the load, but also makes the minimum system configuration capacity, investment at least, must be carried out to optimize the system design, wind power generation system is also true . But the wind / optical hybrid generating system to the characteristics of two different power generation systems by combining their respective strengths in order to achieve the best match, which more than two separate power system design more difficult and complicated. A lot of wind / light power generation system while so-called optimized design, in fact, these two do not really complement each other power generation systems. Along with the production and living standards are improved, the world's energy consumption growth. Study shows that, 1965’s energies were increased almost 6 times than 1900. The past 40 50 years, a large portion of energy consumption come from fossil fuels. Many times the energy crisis led to the recognition that mineral resources are limited, the world's oil resources can only be maintained for several decades, people have gradually concern by shifting the focus to new energy development and utilization up. Expected the next century, new energy will be more important position of energy in the world. It was the atomic energy and solar energy can be referred to as the 21st century source.

Energy is a human life, one of the five elements that is the national economic and social development of strategic materials. New and renewable sources of energy mean that mass-energy, wind energy, solar energy, small hydropower, ocean energy, geothermal energy, hydrogen energy and other energy resources except to conventional energy sources other than hydropower and large-scale biological. At present, new sources and renewable sources of energy mainly in the form of non-commodity energy for the general provision of energy supply in rural areas, but with the social and economic development of new and renewable sources of energy is also steadily to change the direction of the commercialization of energy. Solar and wind energy applications is the relatively wide range of two renewable energy sources. Solar and wind energy have few advantages than other conventional energy sources to use. The interior of Solar releasing a huge light and heat due to nuclear fusion of hydrogen thermo nuclear reaction, which is the source of solar energy. Hydrogen production capacity in the area of nuclear fusion, hydrogen burning time of nuclear stability can be more than 60 million years. This means that the sun can be used indefinitely as now at least 60 million years., especially that conventional energy sources are less than before, it is extremely attractive to more people. Injection of energy the sun, the earth is only one ten thousandth 20, and the rest are lost to space, went to BU.The Earth's surface are entitled to receive 7.034×1024 Joule of energy for one year, which is equivalent to 200 trillion tons of coal combustion issued by the tremendous heat. According to the calculation of M.R.Gustavson, solar flux between the earth and the sun is 1400 W / m2, and the Earth's surface, the energy gained per second for the 350 W / m2, converted to electricity for one year equivalent to about 1.58×1018 degrees. Wind energy is a transformed form of Solar, which is estimated by M.R.Gustavson, boundary layer winds in the global total energy of 1.3×1015 watts, the year of about 1.14×1016 Kilowatt-hour of energy.

At present, this is equivalent the annual world energy by burning about 3000 times. Fossil fuels, coal and oil resources are uneven geographical, and industry caused by the uneven distribution of coal and oil transport uneven. Even it can be powered by electricity, but a number of mountains, islands, grasslands and high altitude, such as power grids are not easily accessible place, make full use of the advantages of energy weather will bring convenience. Although the distribution of solar and Small wind generator energy also has some limitations, but with the fossil energy, hydropower and geothermal energy, such as the comparison may be held to be a broader distribution of energy. Resources such as the world's oil distribution in the face of the earth do not Uniform, the world's proven oil reserves, only in the Middle East on the world's total reserves of 57%, and some consumer State-owned oil more oil reserves and output are relatively more, and some even do not produce oil. Coal carbon is also very uneven distribution of resources, the vast majority of the world's coal resources are embedded in the region for more than 300N, The former soviet union, the united States and china account coal for about 90% in the world. 

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A variety of ways for polished stone

Granite used for a long time the need for its polished, it can be restored to its former beauty, commonly known as refurbished. Here, I will talk about: a variety of ways and polished stone.

Before renovation polished pointing first, and then do water, do caulk, the purpose is to make as little water absorption granite, brown granite absorbent to reduce British law, under conditions permitting, the last to do it again waterproof.

Roughing: Granite groove joints before grinding to do waterproofing and caulking. Came out to be waterproof, hard resin using diamond grinding block, coarse to remember that not too much water, each grinding mill finished dragging a clean mop, thoroughly dry the water, check the grinding notches deep left Road is zoned with 50 # grinding worn away, and so on, go tic-tac-grinding machine, coarse grind 45% the total time of completion of the project is to ensure the quality and acceptance of the key links.

Finely ground: after grinding to do before waterproof, waterproof effect after it, use a soft diamond resin sheet mill, finely grind the whole time accounted for 35%, after fine grinding to 2000 # gloss up to 50 degrees.

Grinding: grinding granite must have 70% before drying, first with natural granite fill sealant for pre-processing, the granite at the same time strengthen the loose fill material. After grinding to enhance high gloss, granite surface density improves, and lay a solid foundation for the polishing agent, enhances the adhesion of polishing materials.

After various grinding bridge saws also needs to be polished, granite and again to restore its beautiful looks up.

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Thermos mixed sand？

Summer is approaching, Thermos flask market freeze, many manufacturers began to discount deal, cheap prices to attract a lot of attention of consumers. There are attentive people found some mug cup body holds relatively soft, with traditional stainless steel is not the same. Some mug got to shake hands when will issue a "rustling" sound. Many people call the woman reportedly expressed doubts: mug is not there anything you prefer?

In Jinan, a number of commodity markets, sales mug store really a lot. With stainless steel mug, the price differences between selling only a few dollars cheaper, you will have a few hundred dollars.

Female newspaper reporter found that many priced at 10 yuan or so mug, grip will issue a "crunchy" sound when shaking hands. A shopkeeper Oriental small commodity wholesale market wholesale business franchise department, said the store will have filling sand mug, "priced at ten dollars, the insulation effect in general." He said, inwardly mug cup filling sand in order to increase weight, so that when shaking the cup is not easy to fall. The store has said a staff member, the inner mug filled with sand see everyday ordinary sand is not the same, "This is a special insulation sand, let the cup cool water slowly."

A shopkeeper Jinan Heng Mall said, some manufacturers in order to increase the weight of the mug will play tricks on bottom of the cup. She said that many consumers believe that the heavier the better the quality mug, so some manufacturers in the production of low-cost mug will depend on the sand when the weight gain.

Truth "insulation sand" there is no insulation effect

In the 23rd, female newspaper reporter in the market to buy a three mug, respectively, which compiled for the 1st, the 2nd, the 3rd. Among them, the 1st, the 2nd is the owner promised free sand mug, the 3rd is the seller claimed mug with special insulation sand.

Female newspaper reporter with a screwdriver in the bottom of the cup three mug disassembled, found three sand bottom of the cup are equipped with similar substances. Sand was the 1st mug inside a powder-like, orange; sand was the 2nd mug is more moist, dark brown; the 3rd mug of sand-like particles is large, pale brown. Sand within the 3rd mug really amazing insulation features?

Professor of Mechanical Engineering Machinery Manufacturing Jinan University to Bo Jackson said, in general, low prices mug simply shell pressed together with the liner, not a vacuum treatment, poor insulation effect; in addition to the high-grade mug outside air is evacuated between the liner with the shell, but also between the liner with the shell coated with a layer of polymer materials to better insulation, the price is relatively expensive. "Most of cheap mug sand was added primarily to reduce costs by increasing the weight of the cup to increase the feel, shoddy, other less useful." Bo Jackson to say.

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Stone cutting machine Introduction

Stone cutting machine, also known as stone by stone cutter machine is a group of stone conveyor table, positioning guide plate and frame consisting of multiple multi-level stone cutter knife.

The main features

1. Cutter set in stone bench Department transported and placed on the rack, between the cutting knife set fixed positioning guide plate; cutter set by the motor, belts, knife shaft, cutting tool composed cutter knife fixed on the axle. This stone cutting machine for cutting stone separately at different depths can be less than one cubic meter of stone less processed, turning waste into treasure, significant savings in stone resources, but also help protect the environment. Various types of stone can be mechanical cutting, high processing efficiency, coupled with the effective use of a small stone, so that production costs are lower.

2 In the machining process, sheet metal cutting methods are commonly used in hand-cut, semi-automatic cutting machine and CNC cutting machine. Hand-cut flexible and convenient, but poor quality hand-cut, size error, waste material large, subsequent processing workload, and poor working conditions, low productivity. Semi-automatic cutting machine in the profile cutting machine, better quality cutting of the workpiece, due to the use of cutting die, is not suitable for the single, small and large quantities of workpieces cut. Although other types of semi-automatic cutting machine reduces the labor intensity, but its function is simple, only for some of the more regularly shaped parts cutting. CNC cutting relatively manual and semi-automatic cutting mode, it can effectively improve the efficiency of sheet metal cutting, cutting quality, reduce the labor intensity of the operator. With the development of modern machinery industry, the requirements for sheet metal cutting efficiency and product quality also improved. Thus the market potential is still very large granite block cutter, the market outlook is more optimistic.

3 CNC cutting machine from a variety of applications, the overall level of technical level, the domestic production of machine performance CNC cutting machines have made ​​encouraging progress, and gradually catch up with the international advanced level, to meet the needs of users, to further improve the market competitiveness. CNC plasma cutting some domestic product in many ways has formed its own unique characteristics, to achieve the "automation, versatility and reliability." In some respects, the technical performance of the product even more than foreign products. Improve productivity and cut quality CNC cutting machines, reduce production cost and improve the overall level of automation and system stability, improve the system functions become direction of technology development.

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Bad habit harm your health

Skipping breakfast

Hazard: Severe Shangwei, so you can not work full of energy, but also easy to "look old."

A foreign university to accept a recent study in 7000 men and women subjects, found that people who eat breakfast habits mortality rate as high as 40%. The other universities in a study of people aged 80-90 found one thing in common is their longevity: Eat a good breakfast every day.

Since many women early in the morning to drink vegetable juice, or ice milk and bread that they do not have a hot meal easy to raise, but experts have to remind a female friend, in the morning or good eating warm breakfast.

Dinner is too rich

Hazard: When the evening insulin levels in the blood for the peak day, insulin allows glucose into fat condense on the north wall of the abdominal vessels, too rich to eat dinner, over time, people will be obese themselves. Meanwhile, a longer duration is greater than usually hearty dinner, but also destroy the body's normal biological clock, people are likely to suffer from insomnia.

For office workers, almost became a day of meals for dinner. Breakfast to see "Table" lunch to see "live", only to sit tight at night in order to truly relax in front of the table, the United States and the United States to eat a big meal. As everyone knows, it is extremely inconsistent with good health, and medical studies have shown that a variety of diseases caused by improper dinner "culprit."

Addicted to drink coffee

Hazard:

1, reduce the pregnancy rate. A cup of coffee per person per sex, the pregnancy rate is likely to fall 50%; 2, susceptible to heart disease. Coffee contains a high concentration of caffeine, can change in heart function and blood vessels in cholesterol; 3, lower working efficiency. Coffee is one of modern life fashionable drinks, the main ingredient is excited brain caffeine, also contains fat, protein, carbohydrates, salts and vitamins. Most instant coffee containing 3% to 4% of the caffeine in a cup of coffee contains about 150 mg of caffeine. Coffee strengths is to provide spiritual, but greed drink coffee will cause disease.

Excessive intake of alcohol consumption

Hazard: large or regular alcohol consumption, the occurrence of alcoholism may cause liver inflammation, swelling, affect the reproductive and urinary systems.

Postprandial smoking

Hazard: make smoke more harmful substances into the body.

Smoking a cigarette after a meal, poisoning is greater than the sum of ten cigarettes usually suck. Because after people eat, the stomach and intestines to enhance blood circulation, then the body's ability to absorb the smoke of a "best" of toxic substances in the smoke is easier than usual to enter the body, thereby exacerbating the human health the extent of damage.

Vacuum flask of tea

Hazard: The destruction of vitamins, a lot of tannic acid exudation and theophylline.

Tea contains large amounts of tannic acid, theophylline, tea, sesame oil and vitamins, with about 80 degrees of water to brew more appropriate, if a long time to soak mug of tea in hot water, like boiling water with a slightly different , make tea destruction of vitamins, a lot of volatile tea, sesame oil, tannic acid, theophylline large number of leaking. This not only reduces the nutritional value of the tea, and promote the tea, but also so that harmful substances increased.

Separated from raw food feast

Hazard: lead to a variety of parasitic diseases.

Salmon, geoduck, sea bass, mullet, raw fish, snakes, turtles, crabs and other office workers preferred food business dinner, the high probability of the presence of parasites and pathogens, plus chefs in pursuit taste delicious, cooking is often inadequate, it is easy for you at the time of bites, the disease from the mouth.

In our traditional diet, mostly vegetables "cooked." By frying, roasting, leavened, stewed, fried, steamed and other cooking methods to prepare delicious dishes. People tend to focus on food color, smell, taste, while ignoring the cause due to high temperature processing of fresh vegetables nutrients vitamins, minerals, fiber and other certain degree of loss. And lettuce, raw juice of the active substance and the body close to make white blood cells in a normal state, but also to eat cooked food and immune function due to damage to recover. However, eating raw food eating raw food is also exquisite, little attention, all the horrors of the above occurs.

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