| Why Renewable Energy? |
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| It is observed that the consumption of conventional energy source has caused more environmental damage than any other human activity. Electricity generated from fossil fuels such as coal and crude oil has led to high concentration of harmful gases in the atmosphere. This has in turn lead too many problems such as global warming. The energy sources such as the Sun, Wind, Geothermal, water, bio mass etc can never be exhausted and therefore are called renewable. They are source, which are ecologically safe and almost infinite, or would replenish themselves in our lifetime. |
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| Why Solar Energy? |
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| India is one of the few countries with long days and plenty of sunshine. The Sun is the single largest source of energy for the entire solar system. In less than 1 hour of daylight, the SUN releases upon the Earth an amount of energy that is consumed by the entire population of the planet in 1 year. This energy is clean, it is renewable, it is free, it is abundant and it is everywhere. This makes it one of the most promising alternatives to the conventional energy sources. |
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| What is Solar Hot water System? |
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| Solar Hot Water System utilizes solar energy to heat water to the desired temperature. The heated water may be stored in insulated tanks for use in the morning or used during day time. The complete Solar Hot Water Tank, Circulation pump, Temperature Controller for the pump and instrumentation to measure water flow rates, quantity of water used, temperatures of hot and cold water, electrical energy consumed and cumulative time for which circulation pump runs. |
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| What is Solar Collector? |
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| A solar collector is a device which captures Solar Energy in terms of heat and exchanges the collected heat to the working medium inside the collector. |
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| What is ETC? |
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The solar collectors used in ‘ElecTra’ are the latest Evacuated Tube Collectors. Each evacuated tube consists of two glass tubes made from extremely strong borosilicate glass. The outer tube is transparent allowing light rays to pass through with minimum reflection as well as absorption. The inner tube is coated with a special three layer selective coating which features excellent solar radiation absorption and minimum heat emission properties. The top of the two tubes are fused together and vacuum is created between two layers of glass, which is an important factor in the performance of evacuated tubes. The absorption efficiency of the tubes is more than 93%.
The sun-rays pass through the transparent surface of the outer tube and strike on the selectively coated outer surface of the inner tube. The selective coating on the tube converts the radiation energy of sun-rays into heat. The tube carries water which receives heat from the tube and becomes hot. |
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| Why is the collector kept in an inclined position? |
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For maximum efficiency, the sun-rays should Strike the collector at right angles.
For water heating applications, maximum output is required during winter when the sun is at lower altitudes. For maximum output therefore, the collectors should face south direction and be kept at an inclination equal to more than its latitude of location. |
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| Will I get hot water in early morning? |
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| Yes. You will get the hot water at any time. In early morning you are getting the water which is heated on the previous day. Due to the PUF insulation of storage tank and vacuum inside the collectors heat preservation is very strong. |
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| Is it very costly? |
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No. When compared to other heaters, the cost of Electra seem high at first sight but comparing the running cost of each you will have better projection of its economy.
Comparison for
heating
100 Liters/day |
Electric Geyser |
Gas Heater |
ElecTra |
| Capital Cost |
Rs.4000 |
Rs.4000 |
Rs.20000* |
| Life time |
7-8 Years |
5-6 Years |
12 Years |
| Annual Fuel Cost |
Rs.8100 |
Rs.4500 |
Nil |
| Total Cost After 10 Years |
Rs. 89000 |
Rs.53000 |
Rs.20000 |
| *Indicated Price |
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