Michel Jullian wrote:
>> >> COP is the ratio of output power to input power. >> >> Harry > > Same thing actually: Eout/Ein = Pout*t / Pin*t = Pout/Pin > Jed's COP=1.2 example was given in terms of energy (1200 joules out / 1000 > joules in), my COP=4 example was in terms of power (1000 watts out / 250 watts > in). > > Michel > The practical significance of the two ratios is very different. Eout/Ein says nothing about the rate at which energy needs to be supplied to the system to maintain the ratio. e.g. 1000 joules in per second and 1200 joules out per minute is not the same as 1000 watts in and 1200 watts out. Harry
