agl - whose the drier...it ain't difficult

The guys elsewhere think the AGL report is all about Dryfining. Is it? Their Coldry fear is out of control. Looks like Dryfining is referred to in the AGL paper. But is it all favourable...? Dryfining has a 2 pronged focus - coal drying and PCC/CCS

AGL paper says on page 11

"The key conclusion from this study was that the implementation of PCC is technically viable, but not commercially viable without significant financial subsidies.
Given the ****inability to commercially apply PCC**** to existing facilities, Loy Yang is"

The "study" was with Worley Parsons/Mitsubishi/Dryfining. Not good for them.

There goes the first prong...what about coal drying...?

AGL paper says page 8:

AGL’s approach to capital investment decisions requires prospective projects to satisfy a number of objectives including, where appropriate, achieving ***a reduction in emissions intensity***."

AGL continually say reducing emissions is the primary aim. So how does Dryfining go on reducing emissions...?

http://www.greatriverenergy.com/makingelectricity/newprojects/dryfining_factsheet.pdf

" CO2 reduced by 4%" Hardly inspiring. How much does Coldry reduce by? About 40 %.

http://www.globalccsinstitute.com/publications/post-combustion-carbon-capture-thermodynamic-modelling/online/94601

"The resulting heat available for coal drying then suggested a fuel moisture reduction from 60% to 54% is possible." Is that all? No wonder the emissions reduction is tiny.

Page 10 of AGL says

"A key area of interest is the recovery of "wasted energy" from the electricity generation cycle. Energy losses occur throughout the power generation process with the highest loss areas being the cooling water circuit, and exhausting of flue gas. Reducing these losses will result in reduced carbon emissions."

Dryfining get their waste heat from the high temp flu gas "typically between 170°C and 190°C"

"The **+circulating water system*** is also a potential source of waste heat for DryFiningTM, although it has to be used indirectly because of its relatively ***low temperature***. This can be done by transferring the heat into the boiler system via fan inlet or outlet coils. The nature of this benefit requires more detailed heat integration modelling. As the units at LYA are equipped with cooling towers, using the hot water fed to these towers may not only benefit the DryFiningTM process but also lessen the heat rejection load on the cooling towers."

Seems Dryfining require high grade waste heat. Coldry need low grade waste heat. Reducing emissions by 4% is a joke. Would AGL go for that???

AGL page 10

"The pre-drying of coal prior to combustion can *****significantly improve the combustion efficiency of the boiler*****, resulting in lower greenhouse gas emissions"

http://www.globalccsinstitute.com/publications/post-combustion-carbon-capture-thermodynamic-modelling/online/94601


"Reduction of the moisture content to 54% results in a reduction of fuel flow to the boiler and through the majority of the coal handling system. The reduced moisture load on the boiler results in an ****increased boiler efficiency from 72% to 75.4%."****

And the above is talking about LYA...

72 to 75.4% is comical. Can't see AGL going for Dryfining.