|
Posted by bugbear on April 25, 2008, 6:58 am
Please log in for more thread options
bugbear wrote:
> bugbear wrote:
>> Dave Baker wrote:
>>>> Of course this project is trivial
>>>> enough that a should a copper rod of
>>>> adequate diameter be available, a machine cut
>>>> slice of stock is the finished item...
>>>
>>> Well it's plate you're after not bar but anyway.
>>
>> Yes - I suspect that cutting a circle from plate
>> is far more likely - I was being slightly facetious
>> with my slice-of-an-enormous bar concept.
>>
>> > Aluminium also has a very
>>> high thermal conductivity
>>
>> Indeed, but substantially inferior
>> to that of copper.
>>
>> http://www.frostytech.com/articleview.cfm?articleID=233
>>
>> Auminium is my fall back option if my dream
>> of copper comes to naught.
>
> Hmm. Given the cost of copper, and the laws
> of physics, an Alu plate of twice the thickness
> may be cheaper (and have the same heat conductivity)
> as a copper plate.
>
> It's the difference betweem heat conductivity
> of an object and specific heat conductivity
> of a substance.
Yuck. Further reviewing of that page
reveals that many common Alu alloys
have heat conductivity far inferior
to pure Alu.
BugBear
|
|
Posted by John on April 24, 2008, 9:00 am
Please log in for more thread options
While copper is the best material, it's also the most difficult to
source.
How about a cast iron plate? A suitable car flywheel can be machined
to suit and would cost very little.
Also remember that one of the major advantages of gas cookong is the
rapid response to flame change. A large heat sink will change all
that.
John
bugbear wrote:
> For culinary purposes, I wish to make
> a heat diffuser for my gas hob.
>
> For low heat simmering, gas is not ideal;
> you need a head diffuser, or (very) thick
> soled pan to work well.
>
> My cunning plan is to make
> a copper hotplate; a rather simple
> piece of fabrication, comprising
> a copper disc (slab!) around 6-8mm thick,
> and around 7-8 inches diameter.
>
> Can anyone advise on the feasibility
> of this, and also indicate where I could
> the material, and any guessed as to cost?
>
> Of course this project is trivial
> enough that a should a copper rod of
> adequate diameter be available, a machine cut
> slice of stock is the finished item...
>
> BugBear
|
|
Posted by bugbear on April 24, 2008, 10:37 am
Please log in for more thread options John wrote:
> While copper is the best material, it's also the most difficult to
> source.
> How about a cast iron plate? A suitable car flywheel can be machined
> to suit and would cost very little.
> Also remember that one of the major advantages of gas cookong is the
> rapid response to flame change. A large heat sink will change all
> that.
Yes - but sometimes you want a slow, uniform simmer.
Whilst I can't make an electric hob quick,
my proposal makes a gas hob slow, giving
me (sort of) then best of both worlds.
BugBear
|
|
Posted by Cliff Coggin on April 24, 2008, 12:57 pm
Please log in for more thread options
> John wrote:
>> While copper is the best material, it's also the most difficult to
>> source.
>> How about a cast iron plate? A suitable car flywheel can be machined
>> to suit and would cost very little.
>> Also remember that one of the major advantages of gas cookong is the
>> rapid response to flame change. A large heat sink will change all
>> that.
>
> Yes - but sometimes you want a slow, uniform simmer.
>
> Whilst I can't make an electric hob quick,
> my proposal makes a gas hob slow, giving
> me (sort of) then best of both worlds.
>
> BugBear
It does so at the expense of fuel economy. The bigger the lump of metal you
need to heat up before the heat permeates to the pan, the more fuel you will
use.
Cliff Coggin.
|
|
Posted by bugbear on April 25, 2008, 5:22 am
Please log in for more thread options Cliff Coggin wrote:
>> John wrote:
>>> While copper is the best material, it's also the most difficult to
>>> source.
>>> How about a cast iron plate? A suitable car flywheel can be machined
>>> to suit and would cost very little.
>>> Also remember that one of the major advantages of gas cookong is the
>>> rapid response to flame change. A large heat sink will change all
>>> that.
>> Yes - but sometimes you want a slow, uniform simmer.
>>
>> Whilst I can't make an electric hob quick,
>> my proposal makes a gas hob slow, giving
>> me (sort of) then best of both worlds.
>>
>> BugBear
>
> It does so at the expense of fuel economy. The bigger the lump of metal you
> need to heat up before the heat permeates to the pan, the more fuel you will
> use.
On a 2 hour stock simmer, the extra (e.g.) 5 minutes
to overcome the heat capacity of the plate
seems a tolerable overhead.
BugBear
|
| Similar Threads | Posted | | Slightly OT Generator 12V system | October 3, 2006, 1:33 pm |
| Slightly OT - in need of small metering pump | October 15, 2008, 6:45 pm |
| Slightly OT - in need of small metering pump | October 15, 2008, 7:05 pm |
| tapping copper? | May 12, 2008, 12:16 pm |
| 10mm Thick Nylon Disc, 350mm Dia required | April 24, 2008, 3:18 am |
| Re: Spring source | March 22, 2008, 2:31 pm |
| Re: Spring source | March 22, 2008, 3:42 pm |
| Re: Spring source | March 22, 2008, 7:12 pm |
| Re: Spring source | March 23, 2008, 5:05 am |
| Re: Spring source | March 25, 2008, 2:14 pm |
|
|
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap