1. Parabolic Concentrator:

Description

Specifications

Size & shape

16 m2  -  Elliptical dish, made up of M.S. frame with multiple pieces of reflecting mirrors supported with a rigid Frame/structure to form concentrator.

Reflectors

Glass mirrors of thickness about 2.5 mm and having suitable protective layer on back to minimize  degradation of the reflective coating due to weathering

Reflectivity

More then 85% minimum with a maximum  degradation of the reflective coating due to weathering

Material of Construction

Mild Steel with epoxy/powder coating rigid enough to resist any deformation of the bowl shape due to wind pressure or manual handling.

1. Central tracking system :

The system shall have a suitable central tracking system so that concentrators track the sun automatically. The central tracking system  consists of winch, SPV panels, low maintenance tubular cell battery of 12V, 40 Ah, electronic controller to charge the battery and operate DC  motor, electronic timer and relay, DC drive motor, wire rope of appropriate diameter (GI), wheels on brackets on stand to guide wire ropes, counter weights to balance and drive the tracking.

1. Steam header and steam header pipe:

The steam headers will have feed water inlet and steam pipeline outlet arrangements with valves and pressure reducing station. The seamless steam header pipe line shall be  of suitable diameter of about 10” Sch.40 seemless.

1. Steam pipe line (Branch)and feed water pipe line :

The Steam pipe line (branch) shall be of Sch.40, seemless  and feed/raw water pipe line should be of ‘C’ Class  GI of suitable diameter to supply steam and feed water for the system requirements.

1. Steel structures :

The supporting Structures for reflectors, steam headers, upper and lower stands, Steam & feed water pipe lines and pressure reducing valve station, feed water tank, central tracking system, winch, ladder etc will be made out of mild steel with anti corrosive  paint coating and suitable sizes of round bars, channels, angles, round pipes , square pipes, and, and aluminum channels. All MS structures shall be assembled with good quality bolts, nuts – cadmium passivated (rustproof) and copper wires. A ladder of MS structure of suitable height with walking path shall be provided adjacent to standing row of reflectors for cleaning and maintenance of  vales, pressure gauges, cleaning of mirrors etc.

1. Instrumentation:

The Solar steam generating system shall be provided with with quality instrumentations like temperature indicator, pressure gauges, pressure release valve, main safety valve, manual pressure release for condensate release before cooking vessels, pressure reducing valve, control valve for provision of boiler back up, main control valve, steam separator with safety valve and  pump set of suitable size for supply of clean water to the system.

1. Supply, Installation and commissioning of solar steam generating system:

The system will be supplied and commissioned on turnkey basis, except for civil work which will be done by the buyer agency under the supervision of the system supplier. The system will be hydro tested to confirm that there are no leakages in the joints. After that trial runs  would be undertaken by the supplier on site to confirm the out put and integration of system

1. Insulation:

The pipelines, receivers etc will be insulated with padded mineral wool insulation material to reduce the radiation losses to ensure that maximum steam reaches the use points – Density of the insulation 100 kg/cm2

1. Painting of the system:

The system shall be coated with ant corrosive paint and synthetic enamel paint of good quality.

1. Performance of the system:

Month wise performance of the entire system for the given ambient and water temperature for the average isolation (Watt per square meter) be provided in terms of kcal or MJ or the kj /hr of Steam of the specified grade.