[Gasification] Fw: Biomass heated ethanol plants

[Dick Glick]

Hello All --

They know how to make cachaça in Brazil --  yeast fermentation in an open vessels of sugar to ethanol with the vessel heated with bagasse -- filtered and then reusing the yeast in the next batch -- no insulation here.

What's the big deal -- just do it as its done in Brazil.

Best, Dick Glick 
www.CorpFutRes.com

----- Original Message ----- 
From: "Mark Ludlow" <mark at ludlow.com>
To: "'Ken Basterfield'" <ken at basterfield.com>; "'Peter Singfield'" <snkm at btl.net>; <gasification at listserv.repp.org>
Sent: Tuesday, August 15, 2006 12:38 AM
Subject: Re: [Gasification] Fw: Biomass heated ethanol plants


> The issue is that, plus, depending on the heat transmitivity of the
> insulation, at some point the losses from convection and radiation can
> actually be increased. A pipe insulated with poor insulation has increased
> area from which to radiate energy. As the diameter is increased with
> insulation, the Grashof Number increases (to D^3; D is a characteristic
> diameter) and convective heat transfer also increases.
> 
> A poor insulation with a low resistance to conduction will actually increase
> heat loss because it has a larger characteristic diameter and more surface
> from which to radiate energy. Past the critical thickness this is not an
> issue; economics is, however.
> 
> Mark 
> 
> -----Original Message-----
> From: gasification-bounces at listserv.repp.org
> [mailto:gasification-bounces at listserv.repp.org] On Behalf Of Ken Basterfield
> Sent: Sunday, August 13, 2006 1:52 PM
> To: 'Peter Singfield'; gasification at listserv.repp.org
> Subject: Re: [Gasification] Fw: Biomass heated ethanol plants
> 
> 
> Hello Mike & Peter,
> Ok,
> is it simply that the cost of extra layers of insulation can never be
> recovered at such lowering  heat losses?
> ken
> 
> 
> 
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