Just recently, a poster to the Journal of Nuclear Physics asked Andrea Rossi about the heat output of the Hot Cat. His concern was whether or not the unit had yet been tested while actually being put to work. The excess heat produced by the Hot Cat may not be as impressive if it is siphoned away. The poster, Seppo, commented:
“It could be that the Hot Cat behaves differently when put to real work, i.e. when the energy generated by it is utilized by transferring the heat efficiently away by fluid, air stream or by conduction.”
Rossi’s answer was that, yes, that is an excellent point, and that they have already been working with heat exchangers. In fact, they have found that the output of the Hot Cat is stable on both the primary and on the secondary circuits. Apparently, the only difference in the amount of heat produced is the flow rate into the exchanger itself.
“We are working already with heat exchangers, using the primary and the secondary circuit and the behavior is stable. Obviously the temperature in the circuits of the heat exchanger depends on the flow rate.”
Rossi also went on to say that the real efficiency they are obtaining through the testing results is much better than his extremely conservative estimates reported in Pordenone.