"Energy Inspired By Nature"
| 1 . | What is GREENTEK Solar Water Heater? Why should I buy it? |
| The GREENTEK solar water heater uses the most
trusted, time-tested copper tube & fin [flat plate collector]
based technology, approved by MNRE [Ministry of New & Renewable
Energy] and BIS [Bureau of Indian Standards].
It has the ability to
heat the water to boiling point and is the ideal way to provide for
all of your hot water needs., be it at your home, apartment, hotel,
hostel, hospital, Laundry, or Industry. In fact, it can also save
you significant money, first as a replacement for conventional
electrical/gas geysers at residences and secondly as a
“pre-heating” system to a conventional gas/diesel/coal fired
boilers at commercial/ Industrial locations., apart from saving the
environment for future generations.
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| 2 . | How much it costs me/us ? |
| It is very economical. A 100 LPD system will cost Rs. 20,000/- plus VAT@4% . i.e., Equivalent to the cost of 4 electrical geysers. The cost of the system goes down as The capacity goes up. | |
| 3 . | How does the system work? |
| The radiant energy is harnessed through the
copper absorbers in the Flat Plate Collectors which are capped by 4
mm thick, toughened, transparent glass which allows maximum
transmission and low emission. All of the water movements in the
copper tubes of flat plate collectors result from naturally
occurring convection currents, the same currents operational in
gas/electrical geysers/boilers.
Cold water is heavier
and naturally migrates to the bottom of the unit. i.e., the copper
tubes. As the water heates-up, it becomes lighter and naturally
migrates upwards to the heavily insulated hot water storage Tank.
These movements are continuous in response to water temperature
differentials within the system.
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| 4 . | What is the weight of the filled unit ? And how much space it occupies ? |
| A 100 LPD solar water heater weighs about 150 kgs. The unit is always full and since it is plumbed to a cold water source, it fills automatically as the hot water is drawn from it. It occupies about 2.5 square meters of your roof space and about 1.5 meter high from the floor level. | |
| 5 . | Is the system safe for children ? |
| Yes. The solar water heater is a pressure-free and concealed system plumbed to Maintain normal atmospheric pressure inside the system and thus it is safe & user-friendly. | |
| 6 . | How is the cold water filled into the system and hot water drawn from it ? |
| The Solar water heater works on a principle
called “Thermosyphon”[natural circulation] Due to density
difference between the cold & hot water, the lighter hot water
flows up into the Solar tank while the heavier cold water enters
it.
Solar radiation incident on the collector panels heats
the copper absorber present inside it. This heat transferred to the
water flowing inside the absorber & becomes less dense than the
Cold water present in the solar water tank. Hot water starts rising
and settles at the top of the Solar tank. Simultaneously cold water
from the solar tank descends into the collector’s Absorber tubes,
gets heated up and the cycle repeats till all the water in the
solar tank is Heated up. Since the solar tank is insulated, the hot
water inside retains heat till next day.
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| 7 . | What are my annual savings if a solar water heater is installed instead of a electrical geyser ? |
| Please see the Cost-benefit Analysis here: | |
| 8 . | Do you also manufacture commercial/industrial models as well ? |
| Yes. We do and government subsidy and soft loans are presently available. For details, contact us on our help line/e-mail. | |
| 9 . | What is the life of the system & whether any maintenance is required? |
| Generally, the system’s life is estimated to be 20 years. Very minimal maintenance is required. Except cleaning of glass periodically, changing of rubber parts once in 5 years & flushing of the collectors and tank, there is no other maintenance Needed. | |
| 10 . | Can we get hot water during winter and rainy seasons? |
| Yes. In our Indian conditions, particularly south and central India, the sky is very clear and we get Maximum solar radiation even during winter and rainy seasons. However, the systems are provided with electrical heater elements with thermostat for back-up heating during non-sunny days. | |