SOLCHROME SOLAR SELECTIVE COATINGS

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SOLCHROME SOLAR SELECTIVE COATINGS

• - An effective surface to tap Solar Energy for
  Solar Water Heaters
• By
• K.K.Singla
• Manager Business Development
• SOLCHROME SYSTEMS INDIA LIMITED
• 61, SECTOR V, PARWANOO (H.P.)
• INDIA

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DIFFERENT TEMPERATURE RANGE OF SOLAR THERMAL
APPLICATIONS

• Low grade thermal energy, below 100 C.
• Medium grade thermal energy, 100 C to
  
• 300 º C.
• High grade thermal energy, above 300 C.

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• HEAT TRANSFER IS CONTROLLED BY THE FOLLOWING
  FACTORS
• Thermal Conductivity.
• Thickness of the Absorber Plate.
• Spacing of the riser tubes.
• Thermal Conductance of joints between
• Fins Tubes.

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THERMAL CONDUCTIVITY OF VARIOUS ABSORBER
MATERIALS
Material Thermal Conductivity W/m
K Copper 376 Aluminium 205 Mild Steel
50 Stainless Steel 24 Acrylic
0.2 Polyethylene 0.3 Polypropylene
0.2 PVC 0.16
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CHARACTERISTICS OF BLACK CONTINUOUSLY PLATED
SOLCHROME SOLAR SELECTIVE COATING SHEETS

• High solar absorptance.
• Low thermal emittance.
• Large angle of acceptance.
• Stability at high temperature during
• collector stagnation.
• Stability in the presence of moisture.
• Life cycle of more than 20 years.
• Economic Cost.

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MAIN METHODS FOR PREPARATION OF SOLAR SELECTIVE
COATINGS

• Electroplating.
• Chemical Vapour Deposition.
• Sputtering.
• Anodization.

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SOLCHROME SYSTEMS INDIA LIMITED

• An ISO 90012000 certified company, engaged in
  the manufacture of
• (i) Black Continuously Plated
• Solchrome Solar Selective
• Coating Sheets.
• (ii) Black Continuously Plated
• Solchrome Solar Selectively
• Coated TIG Welded Fins and
• Tubes.
• (iii) Solchrome Flat Plate Solar
• Collectors.
• (iv) Solar Water Heating
• Systems (SWHS).

Regd. Office-cum-Works in Parwanoo, Himachal
Pradesh The first Continuous Plating Solar
Selective Coating facility in India
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SOLCHROME PROCESS

• Based on years of research and machine
  development.
• Each roll of copper goes through pre-cleaning
  and rinsing stages
• before nickel is applied.
• Subsequently, the copper is rinsed again before
  the black chrome
• solar selective coating is applied.
• Subjected to a series of chemical rinses after
  which it undergoes an
• extensive drying period.
• A series of tests are carried out by our Quality
  Department to
• ensure that our customers receive an
  excellent product.
• Optical readings are taken at every 30 m to
  check Absorptivity (a) 0.96
• 0.02 and Emissivity (e) 0.12 0.02.

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SOLCHROME PROCESS

• The continuous manufacturing process is the key
  to the consistently
• high optical readings achieved.
• The coating thickness is controlled by line
  speed, tank temperature
• and current density.
• Ensures production of a much higher quality
  solar selective surface
• than traditional batch electroplating.
• The nickel undercoat ensures better moisture
  resistance, better
• adhesion of coatings on the base metal,
  better control of emissivity
• and a long life for the coatings.

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TESTIMONIALS

• More than 7,00,000 sq. mtrs. area of Black
  Continuously plated
• Solchrome Solar Selective Coating Sheets have
  already been
• produced and marketed by us.
• Various clients spread all over India are our
  regular and
• trusted customers.
• Dealer Network / Business Associates at
• (i) Hosiarpur (Punjab)
  (vii) Ranchi (Jharkhand)
• (ii) Chandigarh (Union Territory) (viii)
  Kolkata (West Bengal)
• (iii) Hissar (Haryana)
  (ix) Bilaspur (Madhya Pradesh)
• (iv) New Delhi
  (x) Raipur (Chhatisgarh)
• (v) Lucknow (Uttar Pradesh) (xi)
  Nagpur (Maharashtra)
• (vi) Jaipur (Rajasthan)
  (xii) Mysore (Karnataka)
• Our products are also exported to various
  countries.

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PRODUCT RANGE
Black Continuously Plated Solchrome Solar 
Selective Coating Sheets in continuous coils or
in cut lengths
STANDARD SIZE
(i) (ii) (iii)
0.15 mm (Thick) x 372 mm (Width)0.17 mm (Thick)
x 366 mm (Width) 0.19 mm (Thick) x 366 mm
(Width)
Black Continuously Plated Solchrome Solar 
Selectively Coated TIG Welded Fins Tubes.
STANDARD SIZE
1700mm (Fins Length) x 1721mm (Tube Length)
1900mm (Fins Length) x 1921mm (Tube Length)
1980mm (Fins Length) x 1995mm (Tube Length)
(i) (ii) (iii)
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Solchrome Flat Plate Solar Collector as per ISI
Standard IS 12933.
Solar Water Heating Systems (SWHS) for domestic,
Commercial, industrial and swimming pool
applications.
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ANALYSIS BY THE INDIAN INSTITUTE OF
TECHNOLOGY,
NEW DELHI
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SOLCHROME TUBE FIN SOLCHROME O BOND BLACK PAINT
O BOND
Analysis by the Indian Institute of Technology,
Delhi of the conclusive joint testing carried out
at the Solar Energy Centre has revealed that even
for low temperature applications of 500 C and
above, Black Continuously Plated Solchrome Solar
Selectively Coated TIG Welded Fins and Tubes
increase the thermal efficiency of Flat Plate
Solar Collectors by more than 30 as against the
use of black paint.
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TEMP (0C)
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40
0
15
30
45
60
DISTANCE FROM CENTER OF RISER
FIG Comparison of transverse temperature
profiles across the fins of three collectors for
500 C 800 C fluid temperature.
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ANALYSIS BY THE SOLAR ENERGY CENTER, MINISTRY OF
NON CONVENTIONAL ENERGY SOURCES OF SOLCHROME FLAT
PLATE SOLAR COLLECTORS
Our Flat Plate Solar Collectors are rated as
extremely high quality collectors, having 72
thermal efficiency, as certified during
IndoorOutdoor Testing by Solar Energy Centre,
Ministry of Non Conventional Energy Sources.
During the Thermal Performance Test carried out
at the Solar Energy Centre, our Flat Plate Solar
Collectors have consistently achieved high
results of around FRUL 4.01W/m²C against the
present requirement of the Bureau of Indian
Standard of FRUL 6W/m²C.
SYMBOLS
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Thank you