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Solar Water Heater

Solar Water Heater

Solar Water Heater (ETC System) - 5 Years Warranty

Solar water heating (SWH) is the conversion of sunlight into heat for water heating using a solar thermal collector. Evacuated Tube Collector (ETC) system is one of the products used in Solar Water Heating technology and widely used all over the world for its efficiency. ETC tubes are a way to reduce the heat loss. Typically, the water piping in an ETC is therefore surrounded by two concentric tubes of glass separated by a vacuum that admits heat from the sun (to heat the pipe) but that limits heat loss. The inner tube is coated with a thermal absorber. ETCs can gather energy from the sun all day long at low angles due to their tubular shape. The tubes are made of a material which is strong, resistant to high temperatures, and has a high transmittance for solar irradiation.

  •   Capacity (LPD) - 100||150||200||250||300||500
  •  Number of Tubes - 10||15||20||25||30||34
  •  Material (Inner Tank) - Galvanized Iron (G.I.)
  •  Tank Thickness (Inner Tank) - 2.0 mm/2.5 mm (as needed)
  •  Tank to Tube Seal - Best Quality Silicon Seal
  •  Insulation - Poly Urethane Foam (PUF) 50 mm
  •  Anti-Corrosion Treatment - Special Marine Coating inside the Tank
  •  Electric Back-Up - Provision Provided
  •  Material - 1.6 mm Borosilicate Glass 3.3
  •  Absorption Capacity - Al-Ni-Cu (Three Layer)
  •  Emission - 8% (80 degree centigrade)
  •  Vacuum - P<200 degree centigrade
  •  Stagnation Temperature - 200 degree centigrade
  •  Material (Outer Tank) - Galvanized Iron (G.I.)
  •  Anti-Corrosion Treatment  (Outer Tank) - Pure Polyester Powder Coating
  •  Supporting Structure - G.I. Sheet Metal/M.S. Angle
  •  Nutbolts - Stainless Steel/M.S. Zinc Coated

Solar Water Heater (FPC System)

Flat Plate Collector (FPC) system is also one of the products used in Solar Water Heating technology and is the oldest one. Flat plate collectors are an extension of the idea to place a collector in an 'oven'-like box with glass directly facing the Sun. Most flat plate collectors have two horizontal pipes at the top and bottom, called headers, and many smaller vertical pipes connecting them, called risers. The risers are welded (or similarly connected) to thin absorber fins. Heat-transfer fluid (water or water/antifreeze mix) is pumped from the hot water storage tank into the collectors' bottom header and it travels up the risers, collecting heat from the absorber fins, and then exits the collector out of the top header.

Flat plate collectors are generally more efficient than ETC in full sunshine conditions, however, the energy output of flat plate collectors reduces more than ETCs in cloudy or extremely cold conditions.

  •   Material - SS 304 or G.I.
  •  Welding - TIG for SS304
  •  Thickness - As per Tank Capacity
  •  Insulation - Glasswool or PUF
  •  Cladding - PP Powder Coated
  •  Pressure Rating - 0.5 Kg / cm2 for Non-Press. Systems; 3.5-5 Kg/cm2 for pressurized systems
  •  Capacity (LPD) - 150||200||250||300||500
  •  Inner Tank - Ultrashine
  •  Overall Size - 2030 mm x 1030 mm x 95 mm
  •  No. of Fins per Collector - 9
  •  Temperature Tolerance of Coating - More than 200 °C
  •  Absorber Sheet (Copper) – Dimension - 0.12 mm x 1900 mm x 155 mm
  •  Riser (Copper tube) – Dimension - O. D. 12.7 mm x 0.5 mm Thick x 1922 mm Length
  •  Bonding between Riser Tube and Absorber - Ultrasonic welding
  •  Collector Box - Specially Extruded Aluminum sections
  •  Glazing - Toughened & Tempered glass 4 mm thick-free from Bubbles and Scratches
  •  Sealing - Silicone Sealant
  •  Thermal performance - FRUL ≤ 6 W / M2 °C, FR (T&) ≥ 0.65
  •  Hydraulic Test Pressure - 5 kg / sq.cm.
  •  Rated Pressure - 2.5 Kg / sq. cm.

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