The plastic processing industry consists of sequence of operations from raw plastic resin up to finished
product. At every stage there is energy saving potential. Plastic processing industry is mainly having types of
Extrusion, Injection moulding, Blow moulding, etc. The details of estimation of demand of energy for typical plastic
processing were developed in 1993 by Power Smart Inc. of Vancouver for natural resources, Canada [3]. If 1 kW of
energy is supplied during extrusion, injection and blow/blown film process, then energy consumed in material drying
is 30 W, 10 W and 27 W respectively making it about 1 to 3 % of the total.
A typical case study of Tangram technology for energy efficiency in plastic processing is depicted in figure
1. It contains simple Sankey diagram for air heated conventional oven dryers. The capacity of heater for the dryer is
5kW. Process air passing through the oven moves through the bed of plastic pellets carrying energy of 4kW and 1 kW
energy is lost in transportation.
The plastic processing industry consists of sequence of operations from raw plastic resin up to finished
product. At every stage there is energy saving potential. Plastic processing industry is mainly having types of
Extrusion, Injection moulding, Blow moulding, etc. The details of estimation of demand of energy for typical plastic
processing were developed in 1993 by Power Smart Inc. of Vancouver for natural resources, Canada [3]. If 1 kW of
energy is supplied during extrusion, injection and blow/blown film process, then energy consumed in material drying
is 30 W, 10 W and 27 W respectively making it about 1 to 3 % of the total.
A typical case study of Tangram technology for energy efficiency in plastic processing is depicted in figure
1. It contains simple Sankey diagram for air heated conventional oven dryers. The capacity of heater for the dryer is
5kW. Process air passing through the oven moves through the bed of plastic pellets carrying energy of 4kW and 1 kW
energy is lost in transportation.
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