[Bioconversion] combined cycles

[AJH]

On Wed, 20 Jun 2007 15:45:06 -0700, Mike Morin wrote:

>>now direct fired coal gas turbines in combined cycle
>>are said to achieve over 50% conversion.
>
>First of all, I'm skeptical about your claim for the conversion rate. 


Fine, it's not my claim I think we'd need to search on something like
"direct coal fired combined cycle" with "integrated" or perhaps
someone here actually knows something about them.

My experience with gt was a direct fired gasification plant running a
modified auxiliary power unit from an aircraft. We probably achieved
less than 11% conversion efficiency but calculated we could approach
20% with a low (2.7bar IIRC) pressure ratio.

>Secondly,  what are the costs associated with the gasification of coal, if 
>it can be done at all?

I'm not in that line but from what I've read these integrated direct
coal fired gas turbines are capital intensive and must run as baseload
to justify the cost.
>
>>We're now seeing micro chip being deployed embedded in gas condensing
>> boilers in beta tests and it strikes me biomass to energy stands to
>> gain better from such integrated schemes.
>
>Please explain, BRIEFLY, how micro chips can be used for this purpose.

I'll be very brief, the word should have been chp (combined heat and
power) but it got spell chucked.
>

>We have more fundamental equity and sustainability issues related to the 
>costs of doing business in our society. That is, the ridiculously high costs 
>of real estate and capital assets. We must undertake a comprehensive program 
>to write off these costs.
>
>It would be useful to me to know about efficiency comparisons between and 
>among the direct burning of biomass, bioethanol, and biodiesel.

OK perhaps someone will start that ball rolling.
>
>
>Workin' for peace and cooperation,

Not bad Mike I do believe you owe a bit of an apology though ;-).

AJH