My water heater overheating sensor!

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Cuicui
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by Cuicui » 04/10/13, 11:21

Cuicui wrote:
Did67 wrote: there is a mini delta below which the system stops ...
Thanks for the precision. I understand better: your system works suddenly, depending on the Delta T. I do not agree with your manual, but that's my problem ...
I can also adjust the delta-T on my regulation (temperature difference between the sensor of the sensor and that of the balloon). My sensors have a surface such that even with a low delta-T, the amount of calories stored in the balloon largely justifies the consumption of the circulator.
Last edited by Cuicui the 04 / 10 / 13, 11: 46, 1 edited once.
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Did67
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by Did67 » 04/10/13, 11:45

Strictly speaking, the intake of calories is the product between the flow rate and the delta T (taking into account the specific heat capacity of the liquid).

Whatever the surface of the sensor.

[you can transport the same amount of heat with a low flow and a high delta T or a high flow with a low delta T.

Above I told you that 5 l / min X 15 ° difference = 15 l / min x 5 ° difference.

The surface of the sensors does not change anything!

I chose the first solution. Circulator on speed 1 (it's like 18 W in speed 1, 30 in speed 2 and 50 in speed 3; I will do the readings this weekend ...).

You choose the second.

I consume less current than if I were to circulate faster, with a lower delta T. While "carrying" the same solar energy.

But of course, each installation, depending on the diameter of the tubes, the elbows in the circuit, the pipes in the panel, has its own characteristics: the same pump, set to the same power, will flow more or less depending on the HMT of the circuit ...

But for the same installation, a lower delta T is more advantageous. Within limits that would significantly increase the temperature of the panels [there, we agree] and therefore the losses. 5 or 10 ° more or less on an insulated panel, with insulated pipes, does not seem so significant to me ... [my delta of 15 is at the optimum, around "solar noon"; it is of course, automatically less before and after ...]
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by Did67 » 04/10/13, 11:52

I concede that I am a little straddling the electrical cons: switching to LEDs, replacement of programmed heating circulator, replacement of LL and LV made (A ++, A +++), suprresion of hurdy-gurdy, etc ...

A circulator becomes, in a house "a little thrifty", an average consumer! [a hundred kWh, against 200 for large modern household appliances; for heating, it's even kifkif or more!]

I think it is consistent if we advocate a reduction in the share of nuclear power.

But this is only my opinion (and my attitude).
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Cuicui
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by Cuicui » 04/10/13, 11:53

Did67 wrote:I consume less current than if I were to circulate faster, with a lower delta T. While "carrying" the same solar energy ..]
Certainly. But you do not take into account the time when your circulator is stopped while waiting for a larger delta-T: at that time there is no energy transported. Obviously, in strong sun when the circulator runs continuously, there is little difference, except that the very hot sensors have more heat losses.
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Dudule
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Re: Overheating of my water heater sensor!




by Dudule » 14/11/17, 23:45

Hello,

I knew this site for the water motor and I discovered the solar part or I am a beginner.

In order to limit nuclear consumption, is it not possible to put a photovoltaic panel which turns a direct current circulator in proportion to the sunshine?
The more sun, the faster the circulator turns and at night nothing turns.
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