cold fusion perhaps, boiller heat versus power

Hi all. this is the second video with my 1 liter plasma reactor, but this time i have replaced the reactor parts by a thermoplongeur,(boiller ) As you can see i have organised a bulleur in the middle of the thermoplongeur, in order to simulate the bubbles that occure in the plasma reaction. So to reach 83.4 degree celsius, and stabilise this température, i need about 67-68 watts. In the previous video you can see that i need only 38-39 watts to reach the same results. So it seems that the plasma reactor seems to show a much better efficiency than the thermo plongeur. Now the question is What is the thermal efficiency of those thermoplongeur ?? Test goes on Good luck at all Laurent