Mary Yugo <[email protected]> wrote: > > How does this simulate a copper heat exchanger with steam at the input end > where as it happens, the T out thermocouple is also located nearby? >
Actually, I was more trying to simulate air trapped under the insulation with the hot and cold pipes right next to one another. I cannot easily bring copper pipes together, so I used these flexible braided ones. I just tied 'em together. They are much closer than the hot and cold ends of the heat exchanger. To simulate a heat source close to a copper pipe, I suppose I could put a heat source around the pipe a few inches away from the measuring point. I'll let you do that. Why should I have all the fun? If it is your hypothesis that this does not work, you should prove it. Putting a heat source ~4" away on a copper pipe would bring it much closer than Rossi's arrangement, because the heat exchanger design would not be good if the heat conducted to the cold end on the outside of the pipes. The fact that heat exchangers work well -- they exchange heat efficiently -- means there is not much heat conducted by the metal surfaces of the pipes from the hot end to the cold end. If there was significant amount of heat conducted by that path, it would not be "exchanged" (that is, it would not heat up the cold fluid). It would be lost to the surroundings. - Jed
