A heat pump moves by mechanical work from. place A to place B an heat volume, termed f.e. in BTU
We have to spent 1 unit energy to move in average 2,5 units energy.( by conventional air-air heat pumps)
But because this 1 work unit is often electric we have to spend 1,8- 3 units( sources-mix- dependent) primary energy to move in average 2,5 units
Take two boxes : one side cold and one side warm. : middle temperature ? total kcal value. ?
Take two boxes: one -/one + and connect them with passive heat-exchanger : middle temperature ? total kcal value ?
Take two boxes : one-/one + and connect them with a thermodynamic Carnot cycle equipment:
you have to invest work energy units for this now active/forced process
YOU change the two boxes ,now system,middle temperature energetic
And by the above calcuation : 2,5 units + 1,8-3 units= 4,3-5,5 units are the energetic invest for 2,5 units movement
https://de.m.wikipedia.org/wiki/W%C3%A4rmepumpe 2,5/4,3 and 2,5/5,5 : the result is called mathematical Quotient in german thermo-physics
GUETEZIFFER, shortly "ETA" and defines the " Carnot-factor"
The emitted heat (kcal,BTU,KJ) is not and nevermore technical restoreable( thermical Pandora box)
by actual conventional physics and her( female) CONSTITUTION
https://en.m.wikipedia.org/wiki/Thermodynamics But process deceleration is possible : but Carnot-factor ever maximal < 1 ~ 0,9999999......... PERIODE