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| lordedmond:
some info please I am building as a side project a triple expansion engine. I have to seal the condenser tubes into the tube plates which go on the ends of the condenser casting then the end cover go on the tube plates will not pass through the casting tubes are 1/4 od and the tube plate is 1/16 inches in both cases I could soft solder them in but the TP could bend and fail to seal the vacuum ( water is in the tube ) to the casting Any ideas Stuart |
| David Jupp:
Is it possible to arrange for one tune plate to 'float' to take up expansion/contraction? A U tube arrangement with single tube plate wouldn't suffer this problem. |
| lordedmond:
thanks for the reply a floating TP would not seal the vac chamber I could alter the design to have a u tube arrangement but getting the bends in may be difficult Thanks again for the input Stuart |
| David Jupp:
--- Quote from: lordedmond on July 24, 2011, 04:10:22 AM ---a floating TP would not seal the vac chamber --- End quote --- It would need a suitable seal - no idea if you have room for such. I've known floating tube plates in heat exchangers sealed to hold significant pressures. |
| lordedmond:
the answer is very little 3 1/2 long 2 high and a inch deep the 3 1/2 is the tube length and it is a two pass system the dwg shows the plates screwed with csk screws to the casting and the end casting bolted through into the casting , but there is no indiction as to the method of sealing. in full size turbine condensers ( this is a triple expansion engine ) they are expanded into the steel TP and are made of brass tube these are 1/4 copper in 1/16 TP as there will be a vacuum out side the tubes and a small water pressure outside , so the seal would have to stand about 10 psi Stuart |
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