Thursday, September 6, 2012

Different Between Thermic Heater and Steam Boiler

What is thermic heater ?

thermic heater produce thermal energy by burning fuels(coal/ wood/ saw dust/ paddy husk/ oil).
Thermal energy charge in to thermic oil which is higher boiling point.
Thermal energy transfer through Thermic oil.

Users 


high temperature needs like more than 200 C. 

Eg : Hanwella Rubber Products Limited. 





What is steam boiler?

Generate steam by burning the fuels.
Steam use for heat and pressure requirement. 


Heat needs 


Tea withering, curing, drying, apparel, knitting industries.
Eg : Hayleys MGT knitting Mill, MAS, Brandix, load Star 

Pressure needs 

steam turbine operation.   

Eg : Norochchole Power plant - operate steam turbine, Sugar Industry operate mills by direct steam pressure  


Can use steam boiler for higher temperature needs? 

There is some limitation to use steam boiler for higher temperature needs.

If required temperature 200 C  steam pressure should be 16 bar (16 kg/cm2  or 230 psi) 


more safe use low pressure(4 bar thermal oil ) thermic heater instead of use high pressure (16 bar steam) steam boiler.






 

Wednesday, September 5, 2012

Relationship Between Temperature and Pressure of Saturated Water and Steam


T = 100 X [ ( P )^0.5 ]^0.5

T - Temperature Celsius
P - Pressure  bar 


This equation can use instead of steam table. 

Steam table available in 
thermodynamic and transport properties of fluids pdf