Title 21.MS.Solar water heater 21-11-17.pdf ✅

ASHIANA HOUSING LIMITED METHOD STATEMENT FOR SOLAR WATER HEATER INTRODUCTION This Method Statement of Solar Water Heater covers, types, apparatus, and technical requirement material specification, testing of material, and general requirements. OBJECT We are blessed with solar energy in abundance at no cost. The solar radiation incident on the surface of the earth can be conveniently utilize or the benefit of human society. One of the popular devices that harness the solar energy is Solar Hot Water System. HEALTH AND SAFETY PROVISION  Safety is the most important consideration while installing the system. Always wear PPEs.  Proper access for the worker and equipment is to be provided to the work place  Working place should be free from all kind of debris  All the safety measures are covered in the project safety plan PREPATORY WORK Selection of suitable solar water heater  Flat plat collector based system are of metallic type and have longer life Flat Plate Collector (FPC) The solar radiation is absorbed by flat plate collector which consists of an insulated outer metallic box covered on the top with glass sheet. Inside there are blackened metallic absorber (selectively coated) sheets with build in cannels or risers tube to carry water. The absorber absorbs radiation and transfer the heat to the flowing water.
Fig-1 Fig-2 flat Plate Collector
SPECIFICATIONS Sr No Description Specification Hot water storage tank Material of Storage Tank S.S.AISI 304 – 400 LPD capacity with 1.25mm wall Thickness Insulation PUF 50mm thick,32 Kg/cu.mt, CFC free. Outer clading S.S.AISI 430. Circulation pipe S.S. AISI 316,1.5mm thick, with 1" BSP end connection. Inter connecting pipe High pressure steam hose with both side 1" BSP swivel nut. Collar S.S.AISI 304. Maximum working pressure Atmospheric. Collector Absorber Material Electro grade copper with 99.9%. Absorber Coating Selective black chrome electroplated,to withstand 300 degree centigrade. Raiser 12.5mm +/- 0.5mm Copper tube. Header 25.4mm +/- 0.5mm Copper tube. Bonding – Header & Raiser Copper brazing. Bonding – Fin & Raiser Tube Ultrasonic welding. Back insulation Rock wool/Mineral wool/Fibre glass wool with 48 Kg/cu.mt density. Side insulation PUF with 25mm thick, 38 Kg/cu.mt density. Collector box Aluminium extruded channel with P.P.Coating. Collector bottom sheet Aluminium sheet, 0.71+/-0.08 mm thick Collector stand M.S Structure with P.P.coating Glazing Toughened glass, 4mm thick with low iron, Transmissivity>87%@near normal incidence. Retainer angle for Glass Extruded aluminium angle with Polyester Powder coating. Beading for glass EPDM rubber. Absorber area 2 Sq.mt+/-0.1sq.mt/collector. Heat transfer media Water. Collector area 2.132 sq.mt Number of Fins/Collector 9 nos. FRUL = 3.64 W/m2 °C Dimension of collector 2050 Lx 1040B x100H mm.
FUNCTION Open loop System (Direct Heating) In this system water tank is connected to collectors directly. The water which is being used flow through collector and collected in tank. Fresh water inlet at bottom of tank.We are using this System only CIRCULATION Thermosyphon System (Passive Solar Heater) In this system water flows through thermosyphonic phenomena. Cold water settled down in collector hot water goes up stored in tanks APPARATUS / EQUIPMENT There are majorly three parts in all solar water heaters Flat plate collector WaterTank Supporting structure for collector, tank, and piping etc Supporting Structure- The structure shall be of non corrosive material or have corrosion resistant protective coating. It will be strong enough to sustain their pressure during the life time of system. Supporting structure for storage tank made out of angle frame 35x35x5 mm up to 200 liter and 65x65x5mm for the capacity above 200 liter. Collector support structure should be in a position of withstand a wind velocity of 100Km /Hr . The vertical supports shall be firmly grouted with roof. WORKMANSHIP  The entire surface shall be smooth and free from roughness, raised spots, scale or any other surface defects. Sharp edges and corners shall be rounded off.  There will not be any leakage observed in the system from any tank /collector /pipe line  All the stands should be cleaned degreased with help of three in one solution .Two coats of zinc chromate red oxide primer shall be applied followed by two coat of enamel paint of approved colour.  The collector box when made of CRCA or HRC steel shall be given corrosion resistant coating on both side These coating may be following type and shall satisfy the requirement given against each. Type of coating Thickness Test to be qualified Painting ---------- Resistance to abrasion as per IS 5116 Electroplating 40μm.Min Thickness & adhesion as per IS 1573 Powder Coating 40μm.Min Resistance to abrasion as per IS 5116  Pedestals size shall not less than 300x300x300 mm of M15 The workmanship and aesthetics of the system will be good and it should be visible to anybody INSTRUMENTS  Temperature gauge one no ( at hot water storage tank)