Finally magnetic heater DIY for FREE

[dakanadaka]

As much as I would love to have more efficiency these are the formules that MarkE has given:

0.830kg/liter * 1.8kJ/kg * 18liters * 73C = 1.96MJ = 0.55kWh
0.55kWh/0.8kWh = 68% efficiency

Teselkoala did the next:

0.8 kwh = 800 watt-hours
800 watt-hours x 60 minutes/hour x 60 seconds/minute = 2,880,000 watt-seconds or Joules of energy.

Using rough figures for mineral oil: Specific heat 1.67 J/gram-degree, density 0.85 gm/ml
So 18 liters of oil would weigh about 18000 ml x 0.85 gm/ml = 15,300 gm

To raise this amount of oil by (95-22) = 73 degrees should then take about
15,300 gm x 73 degrees x 1.67 J/gm-degree = 1,865,223 Joules of energy

And 17 minutes = 1020 seconds, so the power needed, if all power goes into the oil, is about 1,865,223 Joules / 1020 seconds = 1829 Watts.

1829 Watts applied for 17 minutes / 60 minutes/hour = 0.28 hour is therefore about 1.829 kW x 0.28 hour = 0.512 kWh of energy.

So, if all applied power goes into heating the oil, it would take about 0.512 kWh. But it actually took 0.8 kWh. So the efficiency is about 0.512/0.8 = 0.64 or 64 percent.

And if this is true then we have around 64 or 67 % of the efficiency.......

the live video of how much it used to reach 95 Celsius you can see it at: https://www.youtube.com/watch?v=KWzhLtqdKVE

So if anyone can say that this efficiency percentage is not true please replay and if you think about building one:

DO NOT begin before you see our experience that we shared on https://emolio.com/Magnetic-Heater , so you can see what challenges you will meet!

as for now this post is then closed

[forest]

You can power it with 230VDC.  That would be 0.71X the voltage you would have if you applied 230AC full-wave rectified into a capacitor.  You could get close by half-wave rectifying 230VAC.DO NOT CONNECT THE HEATER CASE TO ANY POTENTIAL OTHER THAN EARTH.  That includes leads that are intended to be at earth potential but may become disconnected from earth due to corrosion, human error, etc.  If you want to connect one side of the heater element to earth do that with a separate dedicated lead at the power supply output to earth.  But absolutely maintain the insulation between the heater element connections and the local safety ground bonding of the element case.  This may not seem intuitive, but it is essential.  You want to guard with your life (in a very real sense) against any possibility of a wiring failure electrifying the water in the heater.  If you electrify the water in your heater, then you can get electrocuted at any of your faucets or in the bath or shower.

MarkE ,Thank You! AS it become much offtopic here I sent you PW message, I appreciate your response.