Solar Thermal Introduction

Modern technology solar thermal polymerization of the sun and use its energy to produce hot water, forklift,steam and electricity. In addition to the application of appropriate technology to collect solar energy forklift truck, the building can also use the sun's light and heat energy is added in the design of appropriate equipment, such as the giant south-facing windows or can absorb and slowly release the sun heat the building materials .
Advantages
(1) common: the sun shine on the earth, without geographical restrictions,packing machine, whether land or sea, whether mountains or islands, are everywhere and recent development and use directly, and without exploitation and transportation.
(2) sound: development and utilization of solar energy will not pollute the environment, it is one of the most clean energy, more and more serious pollution in the environment today, it is extremely valuable.
(3) enormous: Each year the sun reaches the earth's surface radiation equivalent to about 130 trillion tons of coal, and solar water heater's total is now the world's largest energy that can be developed.
(4) a long time: According to the current estimated rate of nuclear energy produced by the sun, hydrogen storage is sufficient to maintain billions of years, but also about the life of the Earth billions of years, in this sense can be said that the sun's energy is The inexhaustible.
Disadvantages
(1) dispersion: solar water heater radiation reaching the Earth's total surface, despite the great, but energy density is very low. On average, near the Tropic of Cancer, sunny summer weather in the case when the noon maximum irradiance of solar radiation in the direction perpendicular to the sunlight area of one square meter of solar energy received on average about 1000W; if by the year The average day and night, only 200W or so. Only half or less in the winter, cloudy day to only about 1 / 5, this energy density is very low. Therefore, when the use of solar energy, want to get some of the conversion power, often require a fairly large area of collection and conversion equipment, higher cost.
(2) instability: due to the day and night, season,forklift, geographic latitude and altitude and natural conditions such as sunny, cloudy, clouds, rain and other random factors, therefore, at a certain ground is both intermittent solar packing machine, is very unstable, giving large-scale application of solar energy more difficult. To make solar energy a continuous, stable energy, which eventually become able to compete with conventional energy sources alternative energy, energy storage to be a good solution to the problem, that is fine as far as possible during the day and store up the solar radiation, for the night or on rainy day use, but also the use of solar energy storage in one of the more weak links.
(3) low efficiency and high cost: the current level of development of solar water heater energy utilization, in some respects it is feasible and technically mature. However, some solar energy installations, because the low efficiency, high cost, in general, economy can not compete with conventional energy sources. Considerable period of time in the future, further development of solar energy, mainly by economic constraints.
2010 "Black Spring" became a number of solar water heater business forever in the hearts of the pain. It seems in many enterprises, industrial decline has become a foregone conclusion. According to Zhu Ling Xu Jiaxing Solar Energy Society introduced the Secretary-General: "At present, there are vacuum tube sets Haining Jiaxing hotline 360, eight million units annual output can be equipped with solar water heaters. Serious excess capacity this year, product backlog, stop half-half workers, even machine for scrap metal appeared to drop to sell the miserable Bureau.