2007-11-24----Evacuated Tubes

Evacuated tubes are the absorber of the solar water heater. They absorb solar energy converting it into heat for use in water heating. Evacuated tubes have already been used for years in Germany, Canada, China and the UK. There are several types of evacuated tubes in use in the solar industry. Apricus collectors use the most common "twin-glass tube". This type of tube is chosen for its reliability, performance and low manufacturing cost.....

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2007-11-24----Heat Pipes

Heat pipes might seem like a new concept, but you are probably using them everyday and don't even know it. Laptop computers often using small heat pipes to conduct heat away from the CPU, and air-conditioning system commonly use heat pipes for heat conduction.....

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2007-11-24----How much energy can a solar collector produce?

Using this energy calculator you may determine how much energy an solar collector will produce each day/month/year. The way you utilize this energy is up to you. You can heat water for showering and washing clothes, or central heat a building. If fact one integrated system can both these functions....

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2007-11-24----How to choose the size of collector
When determining what size collector you need, you must consider two key factors: insolation level and energy requirements. Energy requirement will usually take into consideration the volume of water and rise in temperature required. Once you know these factors you can determine the size collector you require. The bigger the collector you have, the more hot water, but you should make an economically sound decision. Generally it is wise to select a size which will provide you with 90% of your hot water needs in the summer.....

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2007-11-24----Solar & Renewable Energy of China

China's modern utilisation of solar energy began in the mid-1970's: following the first national solar conference in 1975, research into solar technologies and their promotion was increasingly undertaken. The development of solar energy was incorporated into some government programmes but it was not until after the Rio Conference of 1992 that the Government drew up "Agenda of 21st Century in China", concentrating on the renewable energies. In 1995 the State Development and Planning Commission (SDPC), the State Economic and Trade Commission (SETC) and the Ministry of Science and Technology (MOST) formulated a "Program on New and Renewable Energy from 1996-2010"....

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2007-11-24----Solar Collector Components

Glass vacuum tubes are the key component of solar water heaters and solar collectors. Each vacuum tube consists of two glass tubes. The outer tube is made of extremely strong transparent borosilicate glass that is able to resist impact from hail up to 25mm in diameter. The inner tube is also made of borosilicate glass, but coated with a special selective coating (Al-N/Al), which features excellent solar heat absorption and minimal heat reflection properties. The air is withdrawn (evacuated) from the space between the two glass tubes to form a vacuum, which eliminates conductive and convective heat loss......

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2007-11-24----Solar Energy Insolation

What is solar insolation?
The amount of electromagnetic energy (solar radiation) incident on the surface of the earth. Basically that means how much sunlight is shining down on us.

Why is knowing the insolation level useful?
By knowing the insolation levels of a particular region we can determine the size of solar collector that is required. An area with poor insolation levels will need a larger collector than an area with high insolation levels. Once you know your region's insolation level you can more accurately calculate collector size and energy output..........

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2007-11-24----Solar Energy

Solar energy is the cleanest and most inexhaustible of all known energy sources. Solar radiation is the heat, light and other radiation that is emitted from the sun. Solar radiation contains huge amounts of energy and is responsible for almost all the natural processes on earth. The suns energy, although plentiful, has been hard to directly harness until recently.....

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2007-11-24----Solar Engery FAQ (II)

2-1. Can the solar collector heat water to a high enough temperature?
Yes, in good weather the solar collector can bring water to boiling point. Generally this is not necessary and so the system should be designed to provide a daily temperature rise of around 25-30oC (45-54oF) in the summer.Sizing a domestic system that can bring the cold water up to 60oC/141oF in a single day is not logical, because if hot water is not used for one day, the following day the system will be boiling and dumping hot water via the temperature relief valve. This is both a waste of energy and water! Please sensibly size solar water heating system to ensure optimal performance and minimal wastage of water.

Download this file: Solar Engery FAQ (II).doc

2007-11-24----Solar Engery FAQ (I)

1-1. Is solar water heating a viable alternative to gas or electricity?
Solar should not be seen as a alternative to gas or electricity, but rather a supplement. Solar cannot totally replace the need for gas or electric heating as there are sometimes days when there is little sunlight. When averaged over a year, a correctly sized solar system can provide 60%-70% of a household's hot water needs. Providing more than this is unadvisable, as too much heat will be produced in the summer. The hot water system can easily be automated,so hot water is guaranteed regardless of sunlight levels......

Download this file: Solar Engery FAQ.doc

2007-11-24----Solar Glossary

Here are a list of some terms you may encounter when reading through our web site. We have tried to make explanations as easy to understand as possible, but if you are still un-clear please feel free to contact us......

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2007-11-24----Solar Keywords for Chinese and English

Solar Keywords for Chinese and English

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2007-11-24----The health in winter from bathing

The dialect proverb goes around a lot of place in our country, such as "washing face with cold water, for the beaulty and health"; "brushing the teeth with warm water, the teeth like it"; "washing the feet with hot water, as if eating invigorant". All these proverbs have some scientific truth. Especially in winter, don't ignore the daily things such as washing face, brushing the teeth and other trifles......

Download this file: The health in winter from bathing.doc

2007-11-24----The health in winter from bathing

The dialect proverb goes around a lot of place in our country, such as "washing face with cold water, for the beaulty and health"; "brushing the teeth with warm water, the teeth like it"; "washing the feet with hot water, as if eating invigorant". All these proverbs have some scientific truth. Especially in winter, don't ignore the daily things such as washing face, brushing the teeth and other trifles......

Download this file: The health in winter from bathing.doc