Clean Power (Pvt.) Limited

Solar Space Heating

The solar collector is based on heat pipe. The size and number depend on the heating requirement. The collector is placed separately on the roof top. Hot water flows from collector to the storage tank through a circulating pump.

Solar Collector Specifications
Item	Specification (Dimensions in mm)
Cover	Aluminum
Frame	Aluminum
Groove	?35 x 1 (T2 Copper)
Insulation	Rock Wool
Vacuum Tube	?58 x 1800
Heater Pipe	?8 x 0.8 x 1800 (T2 Copper)
System Efficiency	45-50%
Working Pressure	0.8 MPa
Vacuum Tube	Hard Borosilicate Glass Tube and Stainless Steel Reflection Strip. Tube Length = 1800 mm Tube Dia = 58 mm No of Tubes = 30

(Typical Temperature Curve of Solar Space Heating)

Layout Diagram for Solar ~ Furnace Oil Combined Space Heater

Thermal Storage
Thermal storage is a cylindrical tank made of GI sheets (rolled to drum). The actual volume of tank is set at double of the requirement in order to cater for future enhancement and steam / vapors. The tank comprises of two (02) concentric tanks made of GI sheets having different gauges. A vacuum is retained between two tanks for the placement of rock wool. Rock wool provides resistance to avoid heat losses to surroundings by conduction, convection or radiation. Since tank is concealed, therefore, pressure relief valve is used to avoid pressure increase in cabin due to any unpredicted block. Water top level will be retained at 50% of tank height where 50% is dedicated for the steam/vapors. The pressure relief valve will operate only for a short duration when the dedicated space for steam / vapors is filled.

730-J, St-178, G-11/1 Islamabad, Pakistan. Off: +92 51 2220334 - 35, Fax:+92 51 2220336