On Sat, Sep 8, 2012 at 1:03 AM, Jouni Valkonen <jounivalko...@gmail.com> wrote: > On 8 September 2012 06:55, Harry Veeder <hveeder...@gmail.com> wrote: >> >> When that system is submerged in the cold bath, the >> spring will become stiffer and this will translate into more pressure >> on the ends of the box, and therefore more potential energy. > > > I think that here you have just 'normal' heat engine. The heat energy/mass > of the hot spring is transformed into the spring energy/mass of the cooler > and stiffer spring. That is, heat energy is transformed into useful > (potential) work. > > Jones's video demonstrated more clearly how this change in crystal lattice > structure due to temperature change can be utilized to create useful work > from heat. With nitinol springs this 'phase change' is more extreme than > with regular springs. > > —Jouni
yup the wolf is always right. harry
