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Evacuated Tube Collector
All glass vacuum
tube is the key part of the system. It is made of double layer borosilicate
glass that can withstand high impact of heat, cold and hailstone
storms, with sandwich high vacuum (P < 5 x 10 -3 Pa
– Thermos structure). The outer wall of the inner tube is
coated with selective special absorption coating and uses the technology
of magnetic control slashing.
With
ETC technology, the reliability increases further, since the function
is independent of atmospheric temperatures. In places where the
winters are very cold and even when there is only moderate sunshine,
the ETC works at its best due to vacuum structure construction.
This is also applicable in the rainy season, when sky is cloudy
and there is partial sunlight.
TYPES OF SYSTEM OPERATION
Operates by
natural convection due to density difference between hot and cold
zones in the system. Typically for a household, the overhead cold-water
tank should be located 7 feet above roof level. The collectors are
installed at angle that depends on the latitude of the location,
facing South.
50 – 60%
of household energy bills are for water heating. If you save 3 kW
for 2 hours as used in electric geyser / boiler, you save 1800 units
per year. This contributes to savings in bills and also equivalent
electricity generated by you for the nation as “ONE unit saved
is TWO units PRODUCED.”
Evacuated Tube Collector Panel
- Borosilicate
glass conforming to ISO 3585
- All glass
concentric dual tube geometry
- Outer side
of inner tube coated with four-layer cermets selective coatings
magnetron sputtering vacuum slashing.
- Space between
outer and inner tube is under vacuum < 5 x 10–3 Pa
- Stagnation
temperature of air < 200 °C
- Inner tank
AISI 304 Stainless Steel, TIG Welded, outer casing AISI 304 Stainless
Steel
- Polyurethane
Foam 40 kg/m3 moulded between the inner and outer tank
- Reliable
and durable 90° rotation imported ball valves
- All Stainless
Steel fasteners
Input Data Required for Design
- Location
details
- Quality
of water (Water analysis report can be provided, if possible,
else sample can be sent)
- Number of
occupants
- Daily hot
water quantity requirement for bathing / dishwashing / cleaning
etc.
- Bathing
/ dishwashing / cleaning pattern
- Present
type of heating considered, type of fuel and fuel cost
- Building
schematic may be enclosed with dimensions of roof available for
installation with North-South direction
Advantages
- Free heating
of water
- Abundantly
available source, everywhere
- Non-polluting,
uses the sun’s energy
- Long life
(more than 25 – 30 years)
- No moving
parts
- Enormous
energy savings
- Round the
clock availability of hot water
- Little maintenance,
totally safe and reliable
- The only
economical alternative for tub-bath requirements
- 100 % depreciation
benefit
- Pollution
free and environment friendly
Evacuated
Tube Collector (ETC) Solar Water Heating System
All glass vacuum
tube is the key part of the system. It is made of double layer borosilicate
glass that can withstand high impact of heat, cold and hailstone
storms, with sandwich high vacuum (P < 5 x 103 Pa
– Thermos structure). The outer wall of the inner tube is coated
with selective special absorption coating and uses the technology
of magnetic control slashing.
With ETC technology,
the reliability increases further, since the function is independent
of atmospheric temperatures. In places where the winters are very
cold and even when there is only moderate sunshine, the ETC works
at its best due to vacuum structure construction. This is also applicable
in the rainy season, when sky is cloudy and there is partial sunlight.
Applications
- Bungalows
/ Row houses
- Hostels
- Hospitals
- Canteens
- Guest Houses
- Boiler Feed
- Apartments
- Hotels
- Lodges
- Dairies
- Laundry
- Dharmashalas
- And all hot
water users
We design and
install the industrial solar thermal water heating systems as per
the customers’ needs. If you can send us the specific requirement,
we will be able to design a suitable system and send you the details
with our techno-commercial offer.
|
System Capacity |
No. of Tubes |
Space in mtrs. |
Dry weight in kgs. |
| 75
LPD |
11 |
1.50
x 1.00 |
50 |
| 100
LPD |
14 |
1.50
x 1.20 |
75 |
| 125
LPD |
18 |
1.50
x 1.50 |
80 |
| 150
LPD |
22 |
1.50
x 1.80 |
100 |
| 200
LPD |
28 |
1.50
x 2.20 |
125 |
| 250
LPD |
34 |
1.50
x 2.70 |
150 |
Technical
Specifications:
| Structure |
All
glass concentric dual tube geometry |
| Glass
Material |
Borosilicate
Glass conforming to ISO 3585 |
| Outer
Tube Diameter |
47
mm ± 0.7 mm |
| Inner
Tube Diameter |
37
mm ± 0.7 mm |
| Tube
Length |
1500
mm ± 5.0 mm |
| Absorber
Coating |
Outer
side of inner tube coated with four-layer cermets selective
coatings magnetron sputtering vacuum slashing.
a >
93%, e < 6% |
| Vacuum |
Space
between outer and inner tube is under vacuum < 5 x 10–3
Pa |
| Stagnation
Temperature (Air) |
<
200 °C |
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