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Quick Davey Cell Tests

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We received a Davey cell from Charlie Tapp on Monday the 19th.  We immediately opened the package. 

We ran five quick and simple runs to see if the Davey cell produced any excess heat. 


Our setup consisted of a beaker, magnetic stir bar, hotplate (for stirring, not heating), thermocouple, a ring stand to hold up the Davey Cell, the Davey cell and a power meter for AC appliances. 


The procedure was simple; boil water with the Davey cell and compare the theoretical energy to the actual used energy.  Below is a step by step of our procedure. 

  • fill beaker or wide plastic bowl with RO (reverse osmosis) water 
    •  optional: put baking soda in the water 
  • weigh the water/container and magnetic stir bar 
  • insert the Davey heater into the bath 
  • plug Davey heater into the energy meter 
  • plug energy meter into wall outlet 
  • let boil for 10-30 min 
  • remove and unplug Davey heater from bath and wall 
  • record temp of stirred bath 
  • weigh remaining water, container and stir bar 
  • record metered power (device gives kWh, plugging the meter in starts the count and unplugging it stops the count) 
  • calculate theoretical power to boil water and heat up the bath 
  • compare for COP 

Our results are in a single spreadsheet

Results Summary: 

We did not see any excess heat.  There was one instance where we calculated a COP of 1.1.  We believe this was in error of our equipment (mainly the power meter, read to 0.01 kWh).  The rest of the tests resulted in a COP of less than 1. 


The Davey cell was certainly fun to play with and observe.  You could clearly see the bubbles emerging from the space between the bells.  The bubbling intensity varied with the concentration of baking soda.  More baking soda, more violent bubbling. 

This specific Davey cell created brass oxides in the water, these turned the water into a brown scummy mixture while the cell was active.  Stainless steel could be used instead. 

We played with adding baking soda a little.  The more we added the better the electrical connection and the more power it drew from the wall outlet.  As we added more baking soda, it got to a point where the Davey cell would continually trip the breaker.  After that dilutions were made for the actual runs. 

Malachi Heder 

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+1 #4 Ecco 2013-08-26 16:12
@Frasp: most of the recent new comments are in this thread:

I would recommend you subscribing to the quantumheat.org comments RSS feed to read discussions in real time:
+1 #3 Frasp 2013-08-26 16:06
Hello? Anyone here?
+1 #2 Malachi Heder 2013-08-22 15:21
@ Charlie Tapp

We did consider that. We measured the difference in weight of the container filled with water. That difference we assumed was the portion of water to phase change. We also measured the bulk temperature of the water and added the power necessary to raise it from room temp.
+2 #1 charlie tapp 2013-08-22 01:28
Thanks guys pretty cool to see something I made being tested by real engineers and scientists. When doing calculations do you consider the work that the actual steam could do? I know that was one of the things on defkalion's demo that made their reactor show lower than it could have. It still did really good. Still pretty close to 100 percent efficient better than an electric or gas stove boiling water. Anyways I will work on tuning and see if that helps I saw one of your videos with the bowls and resonance last night Maybe there is some help if it was tuned to 60 hz. Regardless you guys are awsome for trying.

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