Solar energy definitions and technical performance of solar water heaters
What is solar energy?
Within the sun together with hydrogen into helium by a nuclear reaction, keep the release of enormous energy, constant energy to space radiation, which is solar energy.
Large amount of solar energy, China's land surface is going to be a solar standard at 170 billion tons of energy. And nuclear fusion reactions inside the sun that can last a long time. It is estimated several billion first billion years. Limited compared to the survival of mankind, the solar energy can be said to be inexhaustible.
Human environment and solar energy
A sustainable development of society should be a not only meet current needs without compromising future generations of society. Therefore, energy conservation, as much as possible using clean energy and environment must be one of the basic principles.
Present, more and more serious environmental pollution problems have affected the lives of our health and safety of coal in energy consumption, which account for a large proportion of the major sources of atmospheric pollution. According to testing, solar energy per square meter
Water heater
In its lifetime can reduce atmospheric emissions coal-fired to harmful compounds. Development and utilization of solar energy which is an important option to reduce environmental pollution. 1992 United Nations convened the Global Development and Environment Conference, many countries have to focus on solar energy development projects included.
Energy is the material basis of human survival, since the 70's energy crisis worldwide, not only endanger the future of society and seriously affected the production of today's social life. The development and utilization of solar energy, on the one hand can be widely used in hot water, electricity, refrigeration, heating and other aspects, on the other hand can save a lot of oil coal and other non-renewable resources, will greatly ease the energy shortage and the serious consequences. As early as 1973, the U.S. government on the formulation of the level of sunlight power generation program, then many countries have formulated corresponding development plans.
Prospect of solar energy utilization in China
A vast territory, rich in solar energy development and utilization of resources and a good foundation. The total quantity of the National Solar Radiation 3.8? 8.4 × 10 kJ / sq m, accounting for about 2 / 3 of the region is greater than the annual sunshine hours of 2000 hours. Wind, geothermal, ocean energy is abundant.
After years of effort, solar thermal encouraging progress has been made. With the gradual improvement of products, public awareness of civilization. Has a potential market of 900 million rural population, the development, application of solar water heater will be the emergence of a large-scale progress in the near future will form an air-conditioning, refrigerator,
TV
Such as the mass market.
Solar Strategy
For the country's environment protection and energy utilities, in order to ascend to the international market and an international solar energy industry, "city", China must quickly use of solar thermal break and a global leader.
This, is our solar strategy.
Brief history of solar water heater
Solar water heater for its safety, energy saving, environmental protection, to facilitate the outstanding features of increasingly high-profile. Along with all
Glass
Superconducting heat pipe vacuum tube and the constant breakthroughs in key technologies, a world leader in solar water heaters made an unprecedented rapid development, increasing its market potential is also great. Following the gas,
Water Heater
, The solar water heater has become a new bright spot, gas, electricity,
Of three solar water heater "three pillars" situation will soon be formed.
The development of solar water heaters, has gone through four stages: nausea drying-type, flat type, glass vacuum tube type, heat pipe vacuum tube.
First generation: bored drying type. 20 years ago in northwest China's long sunshine hours and other areas, has now been eliminated.
Second generation: flat. Poor results due to frost, heat loss of a large, easy to plot scale, low thermal efficiency and short service life and other issues have been gradually phased out. Because of their low cost, the project is still in a certain market.
Third generation: all-glass vacuum tube. Higher collection efficiency, good insulation properties, can be a diameter of 25 mm anti-hail attack, suitable for temperatures above -25 for use. Moderate cost. However, through a long period of vacuum tube water heating, there is leaking, the possibility of furring.
Fourth generation: heat pipe vacuum tube. My use of the United States used in aerospace, satellite and advanced on the thermal technology, the super heat pipe and all glass vacuum collector tube combination, developed a new generation of heat pipe vacuum tube solar water heaters, heat fast, high thermal efficiency, especially for the sun daily sunshine time is short enough or the area. Water does not vacuum without fouling, freezing ability, good insulation properties, long life, is the new darling of the market.
Technical performance of solar water heater
Solar water heater with its economic, energy saving, environmental protection, safety, convenience and advantages of large water supply, has attracted world attention. As the key technology of solar water heaters and constant breakthroughs in solar water heaters have been widely used in households, factories, mines, hotels, schools, military units, hospitals for the shower, hot water washing and other Xuyong place. About the Author
