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[Big_Steve]

Here's one for all of the furnace buffs out there.
As we all know cupolas/ettes kick out a lot of heat. How much do you think this is? I am designing a furnace for the 6th international in 2010. Whether it is picked by the panel or not is  completely different matter however the furnace recycles all of the heat put out from the top and the sides. I am going to be taking a lot of readings off of the furnace problem is I wont be running so much as it is just me over here to do it. I am asking anyone and everyone who will be pouring in the next 6 months please measure the temperature of your furnace. There are two easy ways top do this.

1. Technical way of expensive kit just get a reading off of it. Farenheight is acceptable however if you can get it in centigrade it would be far more preferable.

2. Measure out  a quarter of a gallon of water (cold) and place it on top of the wind belt next to the side of the furnace N.B. DO NOT HAVE THE PAN TOUCH THE SIDE OF THE FURNACE! keep a slight gap. It can rest on the wind belt as normal. Also if you could repeat this on the top of the stack/lid and time both as to how long it took to boil all of the water off this would be greatly appreciated. Also don't forget to include size of furnace and how hard you were running them. Do this twice once at burning in stage and once in full flow of pour and this would be brilliant,

Much appreciated Steve

P.S. All data collected will help in the design of this new furnace and hopefully save a lot of headaches. It wiill be like nothing you have ever seen before!!

[Iron Guild]

Regenerative cupola
there are some facts and figures in Steve Chastain little yellow book.
“it says that as much as 75% of the heat from the coke is lost out the top and through the lining.

BTU value of coke is 14,500 BTU's per pound. According to some web sites.

I’m interested in your design ideas!

[jack craft]

I have a paper from India that I printed off of the internet that addresses efficency of "small" industrial cupolas. If you want I will see if I can find it and pass on the link.
Jack

[Iron Guild]

i think you should use a roots blower or some other sort of air pump.
if you will be pushing the air past some kind of heat exchanger you will need the push power.

how big are you thinking?
josh