Timeline for Measuring temperatures at two points: weird trend?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jan 31, 2013 at 21:09 | comment | added | mdma | The CoP for compressor/inverter systems like fridges and heating pumps because they are just moving heat from one place to another, so the net heat output can be higher than the energy consumed. With a resistance based heat pad, this turns electrical energy into heat, and so the amount of heat produced can never be more than the electricity consumed. | |
| Jan 31, 2013 at 20:59 | vote | accept | c0d3rz | ||
| Jan 31, 2013 at 20:59 | comment | added | c0d3rz | Hmm, just one last question about this CoP. Why is that the CoP is greater than 1 in the case of cooling? | |
| Jan 31, 2013 at 3:00 | history | edited | mdma | CC BY-SA 3.0 |
added 3 characters in body
|
| Jan 31, 2013 at 2:59 | comment | added | mdma | The lower sensor changes quickly because the rate of conduction through contact with #1 is much quicker than conduction through the air to #2. | |
| Jan 31, 2013 at 2:56 | comment | added | c0d3rz | Hi mdma: The freezer is always switched on, it is never turned off. Also, I'm using a 120W heater instead, so the heating/cooling difference is not that large I think. If I go with the idea of thermal inertia, why is that the lower sensor (Sensor #1) changes so quickly then? Shouldn't it face the same problem? | |
| Jan 31, 2013 at 1:46 | history | answered | mdma | CC BY-SA 3.0 |