[Stoves] Stirling to drive fan

[Paul S. Anderson]

Ken and Andrew,

Ken wrote:  (snipped)
> As we both saw at a recent Stirling Engine Society meeting at Kew Bridge,
> there are plenty of enthusiasts cabable of making a hot air engine for
> driving a small draught fan.

Interesting, and desirable.  But can you help us find one or more of those
enthusiasts to do (I mean donate) their skill to benefit the stoves efforts?

A couple of years back I had a Stirling engine made for me.  It worked but it
didn't do work.  Since their invention so long ago, SMALL Stirlings 
have worked
but they do not do useful work.

Can either of you be the connection between stoves-that-use-fans and small
Stirling-engines-that-drive-fans?  We need a "believer" (enthusiast) of
Stirlings who can become a believer in fan-powered cookstoves.

We, the Stovers, can show and even provide the stove part of the teamwork.  A
logical starting point would be similar to the fan-power utilized by the Reed
Woodgas Campstove and the Phillips stove, operated either with T-LUD 
combustion
or TF?FB (trickle-fuel/fan-blaster) combustion.  (But do not have the 
fan built
into the stove body.  Instead the fan should be separate but under or beside
the fuel canister for cost and maintenance reasons and so it could be utilized
with other types of fan-powered stoves.)

No need here to re-hash the dream of small Stirling power.  We know the 
dream. But is there someone who is going to create the reality of a 
Stirling-powered
fan stove?  Probably not a "Stover".  But a Stirling enthusiast just might do
the job.

Paul
-- 
Paul S. Anderson, Ph.D., Geography professor - Emeritus
Telephone:  USA-309-452-7072 (residence and office)
Internet site:  www.ilstu.edu/~psanders
For my gasifier stoves info, go to:
http://bioenergylists.org/contributors#Paul_Anderson


Quoting Ken Boak <kenboak at stirlingservice.freeserve.co.uk>:

> Andrew & Stoves,
>
> I have emailed the Chinese Thermoelectric company  asking for representative
> prices.
>
> The placement of the TE modules in the stove would require some thought, so
> as to get the correct level of heat flux through them - without overcooking
> them.
>
> I still think that there is mileage in considering steam of hot air for
> driving the forced draught fan.
>
> As we both saw at a recent Stirling Engine Society meeting at Kew Bridge,
> there are plenty of enthusiasts cabable of making a hot air engine for
> driving a small draught fan.
>
> With steam however the solution might be simpler, either with an ejector or
> turbine.   I used to make turbines from cocoa tins lids in my youth.  As
> long as you have a failsafe way of releasing the pressure, then small steam
> should be feasible.
>
>
> Ken
>
>
> ----- Original Message -----
> From: "andrew" <list at sylva.icuklive.co.uk>
> To: <stoves at listserv.repp.org>
> Sent: Thursday, September 21, 2006 1:12 PM
> Subject: Re: [Stoves] Gas lamp efficiency
>
>
>> On Thursday 21 September 2006 11:06, Ken Boak wrote:
>> > Andrew and Stovers,
>> >
>> > Here is one Chinese company offering lower cost TEMs.   Hi-Z being based
> in
>> > the USA will certainly  not be the cheapest.
>> >
>> > http://www.sitechina.com/thermoelectric/Pspec.html
>>
>> OK Thanks for finding that again Ken, I haven't had time to look at their
>> prices though, some comments on my analysis would be welcome.
>> >
>> > If you scroll down to the bottom of the page you will see an application
>> > where 4 modules have been bonded to the bottom of a saucepan, and the
>> > current produced is lighting a compact fluorescent lamp.
>>
>> Yes, I saw this before, in later discussions Crispin has pointed out the
> TEG
>> is better placed between the input air and the combustion chamber.
>> >
>> > Modern electronic design could produce a compact, low cost and efficient
>> > inverter to power these CFL bulbs from a varying dc supply, or power
> some
>> > white LEDs.  The inverter need only cost about 50 US cents.
>> >
>> > Whilst white LEDs are fairly efficient, they are really only suitable
> for
>> > spot lighting - such as a substitute for a desk reading lamp, and CFL is
>> > better for lighting an area - a 20W CFL will easily light a room of 16
> m2
>> > or more.
>>
>> Thanks, I knew there was little to choose between fluorescent and LEDs in
>> lumen per Watt. In fact I use a 121V 8W fluorescent tube in my van, these
>> have high frequency inverters built in and cost about GBP5.
>>
>> AJH
>>
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>
>
>
>
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