Solar Water Heaters - Domestic |
| FeaturesHow It Works ?Technical DetailsAdvantages over conventional FPC systems FAQ's |
Electra Features |
• High thermal output with extra heat retention
• Eco Friendly
• Hot water even in winter and partially cloudy days
• Electrical backup heater for additional capicity
• Low maintence & easy to clean
• High temerature sustainability with longer life
• MNRE approved
• Attractive finance available @ 2% per annum*. |
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| No. |
No. of Persons* |
Capacity in LPD (Ltrs/day) |
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| 1 |
3 |
100 |
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| 2 |
4 |
150 |
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| 3 |
6 |
200 |
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| 4 |
9 |
300 |
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| 5 |
14 |
500 |
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| * Average consideration 20 - 25 liters per person |
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How It Works? |
The ‘ElecTra’ solar water heating system works on the principle known as “Thermo-siphon” (natural circulation by heat). Due to density difference between the cold & hot water, the lighter hot water flows up into the tank and the heavier cold water enters the collector.
Solar radiation incident on the collector tubes heats the absorber. This heat is transferred to the water contained in the tubes & becomes less dense than the water in the storage tank.
Hot water starts rising and settles at the top of the storage tank. Simultaneously cold water descends to the collector absorber tubes, gets heated up and the cycle repeats.
The circulation in the system during the heating process is purely due to the difference of density only. There is no other mechanical moving part; hence the system reliability is very high.
At the end of the day when radiation is zero (after dark / sun set) the tubes will contain heavier cold water and the tank will have lighter hot water. This will ensure that there will be no circulation during night & hence no conduction losses on account of this.
The hot water storage tank is well insulated so the water stays hot and can be used later in the day or even the following day. Hence the hot water you are getting in the morning is majority the performance of ‘ElecTra’ of the previous day.
The Sacrificial Anode prevents the tank from galvanic corrosion. The system works well even in low sunlight days.
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Technical Details |
Inner Tank
• SS 304 anti corrosion material
• Automatically welded for quality and reliability
Outer Tank
• Pre coated steel
• Automatically seamed joints
Insulation
• 50 mm pressure injected high density PUF
• Overnight temperature drop 4-5 °C
Collector
• Borosilicate Evacuated Tube Collector (ETC)
• Absorption > 92%
• Radiation loss < 8% (up to 80 °C)
• Electrical backup heater
• Stucco aluminium reflectors for fast water heating
• High temperature silicon rubber sealing.
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Advantages over conventional Flat Plate Collector (FPC) systems |
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Hard water / scaling does not corrode the glass tubes |
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Floor area requirement is 40% less |
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High efficiency even in low sunlight condition due to selective coating and vacuum as insulation |
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Easy installation and maintenance as light weight individual tubes are assembled into the system at the point of installation whereas in FPC entire panels have to be hoisted to terrace |
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Overnight heat loss is only 4 - 5 °C whereas in case of FPC it is 7 - 10 °C |
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Less sensitive to placement angle which facilitates plumbing and architectural freedom dis like FPC systems |
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FAQ's |
Will i get hot water in the morning?
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.
Can Electra perform in low sunlight conditions?
ETC's are having solar selective coating which absorbs visible as well as infrared radiation even in diffuse sunlight whichgives hot / warm water in low sunlight days also.
What is the expected life of Electra?
Since Electra is ETC based heating system, life expectancy is more than 10 years. |
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