advanced boiler technology-warga boiler

WARGA BOILERADVANCED FIRE TUBE BOILERDESIGN

Scotch Marine boiler downsides•Too Too numerous tubes & too manypasses•Tubesheet Tubesheet cracking•Efficiency Efficiency degradation at part load•Large Large amount of refractory liningbeing a heat sink

Scotch Marine boiler downsidesToo numerous tubes in up to 4 passes

Scotch Marine boiler downsidesLarge amount of refractory lining at frontand rear

Scotch Marine boiler downsidesEfficiency degradation at part loadlosses (up to 15%)boilerefficiency(also calledinput/outputefficiency)measured bydirectmethodinstant efficiency (alsocalled combustionefficiency) measured byindirect methodseasonalinput/outputefficiency50100110boiler load [%]

Main areas of improvents of ScotchMarine boiler design•Tube Tube & passes number reduction•Elimination of refractory lining

Ways to improve Scotch Marineboiler design•Exact Exact heat transfer calculation•Introduction of cooled door•Common Common platform

WARGA BOILER• Up to 70% less tubes• Up to 100% intensified heat transfer (2.5sq.ft./HPboiler)• Only 2 passes in reverse flue design• No o refractory lining• Cooled door design meeting all criteria applicable alsoon steam sboilers• No o efficiency degradation at part load (efficiencyincreases at part load - unique in industry)• Absence of tubesheet cracking• Common platform• Retrofit of installed Scotch Marine boilers possible

WARGA BOILER IN USATucson Medical Center

WARGA BOILER IN USATucson Medical Center•33 high pressure 400HP steam boilers installed in1999•Design Design and claims proven with data log•Return Return on investment in 2 years•20.5% 20.5% reduced fuel usage for same amount of steamgenerated at unchanged fuel-toto-steam efficiency(!)•No No downsides observed•No No trace of tubesheet chacks after 10 years ofoperation (on previous two 600HP boilers tubesreplaced 2 times in 20 year operation, furnacerewelded in first year)

WARGA BOILER IN USASide view

WARGA BOILER IN USASide view

WARGA BOILER IN USAJust 75 2.5” tubes in 400HP boiler

WARGA BOILER IN USACooled door with burner orifice

WARGA BOILER IN USARear view

US BOILER RETROFIT MARKETSIZE