lawry
Junior Member
Posts: 113 
|
Post by lawry on Feb 14, 2016 8:36:31 GMT -8
Ok. So the bench will have to be part of the Bell ISA calculation i guess. This is good to know because i dont have to stick to using channels in the bench.
Dankie.
|
|
|
|
Post by josephcrawley on Feb 14, 2016 12:59:23 GMT -8
I have yet to add the tiles. We are in a rough cold snap so I guess I'll have to wait for spring. Some testing I did last year has led me to a 1 to 3 clay/fine sand mortar with 1/12 part sodium silicate mortar as the tile grout. This has a tendency to gel so don't mix more than you'll use in an hour. I really want to make it look like a rubix cube but people with better taste have prevailed on me
|
|
|
|
Post by wiscojames on Feb 14, 2016 15:21:00 GMT -8
pshaw - some "people" just don't understand how profound the 1980's puzzle craze was. I may have to poach your idea in a future project.
|
|
|
|
Post by mkrepel on Apr 24, 2016 14:25:56 GMT -8
Nice build.
|
|
|
|
Post by martinus on Dec 31, 2016 7:42:16 GMT -8
Also can someone explain the blind bench. I think the flue gasses heat up the gasses in the bench even though the flue gasses will quickly turn right into the chimney... Am i right? If i m right then what have you guys found to be the optimal size for a blind bench? No, you aren't right, I'm afraid. The blind bench is completely open to the main bell and in that sense it's just a part of it. Hot gases want to fill the top of every space first, thereby replacing cooler gases. In effect, where the bench opens to the main space of the bell this is suddenly quite a bit larger so the gases will stream slower. Warm air is streaming into the top of the bench and cooler gases stream out at the bottom. The exhaust opening to the chimney is at the lowest point of the whole bell/bench combination so that's where this cooler gases will exit. The crux is, the exit opening is lower than the top half of the bench. The same with a house which is heated with hot air is always hotter at the top and coolest at the lowest floor, isn't it? The longest blind bench I've seen so far is 2.5 meters (8.2 ft) long inside. Getting warm without a sign of hesitation. I haven't heard about a blind bench built as a curve but I think it's possible. Hi Peter, Do you have any tips with regards to making a blind bench build as a curve which heats properly throughout? Also I would expect the part of the bench closest to the heater/center mass to be the hottest. If you make a bench with pipes in it you can make the pipes go closer to the surface to ensure even heating of the bench. Do you have tips to obtain the same effect in the blind bench (maybe by adding extra mass on the inside of the bench nearest to the heater)? |
|
|
|
Post by peterberg on Dec 31, 2016 8:12:00 GMT -8
For sure that a blind bench will heat up quickest close to the main bell, yes. Your idea to double up the mass closest to the bell might be a good one. The top of such a bench will reach the highest temperature so doubling the top would be the most effective. I'd think the inside should be straight in order to distribute the heat so the outside would be built in two levels for example.
|
|
