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Environment
and Energy Management Group |
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Solar
Water Heater |
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| We are authorized dealers of
M/s Sol Chrome India (P) Ltd , the leading manufacturers
of flat plate collectors for solar water heating system.
we supply and install solar water heating systems for
homes , hotels and industries on turn key basis |
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| ESTIMATES
OF REQUIREMENTS OF HOT WATER - SOME USEFUL THUMB RULES |
| Application |
Typical Requirement of Hot Water
at 60OC. |
| Household bathing using
buckets |
10-20 litres per person per bath. |
| Household bathing using
shower with a mixing tap |
20-30 litres for 10-15 minute bath
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| Shaving, while a tap runs |
7-10 litres |
| Household bathing in bathtub
(one filling) |
50-75 litres |
| Co operative Vanaspati
Plant, Churhat |
Sharda Solvent Ltd, Shivpuri |
| Wash basin with a mixing
tap (hand wash, brushing of teeth, etc.) |
3-5 litres per person per day. |
| Kitchen washing |
2-3 litres per person per day. |
| Dishwasher |
40-50 litres per wash cycle |
| Clothes washing machine
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40-50 litres per cycle |
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| Solar
Water Heaters |
| • |
Hot water at 60-80 C for
hotels, hospitals, restaurants, dairies, homes,
industry etc. |
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Solar water heaters (SWHs)
of 100-300 litres capacity are suited for domestic
application. |
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Larger systems can be used in restaurants,
canteens, guest houses, hotels, hospitals etc. |
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| Savings
and Environmental Benefits |
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A 100 litres capacity
SWH can replace an electric geyser for residential
use and saves 1500 units of electricity annually.
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The use of 1000 SWHs of 100 litres
capacity each can contribute to a peak load shaving
of 1 MW. |
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A SWH of 100 litres capacity can prevent
emission of 1.5 tonnes of carbon-dioxide per year. |
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Payback period ::. |
| 2-3
years when electricity is replaced |
| 4-5
years when furnace oil is replaced |
| 6-7 years
when coal is replaced |
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| Savings
on electricity and money |
| Hot water requirement |
100 ltrs |
| Energy consumed per day
for heating 100 litres of water |
4.7 kwh |
| Cost of electricity consumed
per day to heat 100 litres of water |
Rs. 22 (1 unit = RS 4.5) |
| Cost of electricity consumed
per month |
22 x 30 = RS. 660 |
| Savings
per year for 100 LPD solar system |
Rs. 6,600 (10 month in a year) |
| Payback period for 100
LPD solar system |
19,500/6,600= 3 years |
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| Solar
Collector |
| • |
Flat-plate
collector with a durable aluminum frame preferably
without any screw on the top face on the collector
for complete protection against water seepage. |
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Rust-proof material for the back-sheet
of the flat- plate collector. |
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Selective coated copper absorber to
ensure high absorption and low emission. |
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Well engineered mounting configuration
to lend greater stability to the entire system. |
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As per BIS specifications and MNES approved
::.. |
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| Tank |
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Rust-proof non-metallic outer body.
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Inner container of high-grade stainless
steel like SS-304L, welded using fully automatic
plasma TIG welding machines to avoid leakage. |
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Special treatment for the stainless
steel inner container for protection against corrosion
due to hard water. |
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Electrical back-up (if required) with
reliable heating element & Thermostat cum cut-out
from a reputed brand with necessary safety approvals. |
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| Comparison
of Solar Water Heater and the conventional water heater |
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Electricity |
Gas |
Solar |
Wood |
Kerosene |
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| Energy source |
Electricity |
LPG |
Solar radiation |
Wood |
Kerosene |
Coal |
| Method |
Resistance heating |
Burning |
Thermo-siphon |
Burning |
Burning |
Burning |
| Cost per 100 Litres |
22 |
6.2 |
0 |
20 |
5 |
15 |
| Running cost/month |
660* |
186.20* |
0 |
600(if the entire wood required for the month
is purchased) |
150 |
450 |
| Life |
10 |
10 |
20 |
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- |
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| Maintenance |
Medium- Failure of thermostat. Failure of heating
element. |
Medium- Failure of the electronic lighter device
& other valves |
NA |
Carbon deposition on utensils & wall, requires
regular maintenance |
High- Requires regular cleaning of nozzle &
other pars |
carbon deposition on utensils and walls requires
regular maintenance |
| Finance cost |
12% |
12% |
2% |
NA |
NA |
NA |
| Total saving over the life period of equipment
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1,32,000 |
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| Pay back period |
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3 years |
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