K_K_Singla_Solchrome_Systems

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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. 1

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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. 2

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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 3

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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. 4

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MAIN METHODS FOR PREPARATION OF SOLAR SELECTIVE COATINGS Electroplating. Chemical Vapour Deposition. Sputtering. Anodization. 5

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6 Regd. Office-cum-Works in Parwanoo, Himachal Pradesh The first Continuous Plating Solar Selective Coating facility in India SOLCHROME SYSTEMS INDIA LIMITED An ISO 9001:2000 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).

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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. 7

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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. 8

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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. TESTIMONIALS 9

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PRODUCT RANGE Black Continuously Plated Solchrome Solar  Selective Coating Sheets in continuous coils or in cut lengths 0.15 mm (Thick) x 372 mm (Width)0.17 mm (Thick) x 366 mm (Width) 0.19 mm (Thick) x 366 mm (Width) STANDARD SIZE: (i) (ii) (iii) Black Continuously Plated Solchrome Solar  Selectively Coated TIG Welded Fins & Tubes. (i) (ii) (iii) STANDARD SIZE: 1700mm (Fins Length) x 1721mm (Tube Length) 1900mm (Fins Length) x 1921mm (Tube Length) 1980mm (Fins Length) x 1995mm (Tube Length) 10

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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. 11

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ANALYSIS BY THE INDIAN INSTITUTE OF TECHNOLOGY, NEW DELHI 0 15 30 45 60 40 60 80 100 120 DISTANCE FROM CENTER OF RISER FIG: Comparison of transverse temperature profiles across the fins of three collectors for 500 C & 800 C fluid temperature. TEMP (0C) 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. 12

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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 Indoor–Outdoor 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/m²°C against the present requirement of the Bureau of Indian Standard of FRUL= 6W/m²°C. SYMBOLS 13

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