Vegetable conservation? freezing

Agriculture and soil. Pollution control, soil remediation, humus and new agricultural techniques.
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Gaston
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Re: Vegetable conservation? freezing




by Gaston » 05/09/18, 11:34

AD 44 wrote:Of course all your answers give ideas about optimizing the use of photovoltaics in self-consumption ... : Mrgreen:

Yes, a freezer with a controllable thermostat could be interesting to store energy in the form of cold.

When the photovoltaic product, the thermostat is set to -20 ° or -25 ° depending on the possibilities of the freezer and when it does not produce, the thermostat is set at -12 ° to ensure the preservation of food.

With a freezer well insulated (and not open), the rise time from -25 ° to -12 ° should allow to hold at least one night.
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A.D. 44
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Re: Vegetable conservation? freezing




by A.D. 44 » 05/09/18, 12:31

CQFD Gaston! : Mrgreen: : Mrgreen: : Mrgreen:
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Re: Vegetable conservation? freezing




by chatelot16 » 05/09/18, 12:50

be careful what you put in the freezer is much more valuable than what can be gained with a low storage of photovoltaic energy

it is not necessary that this kind of system decreases the reliability of the freezer

an intelligent freezer thermostat would be mainly useful to increase the security: to give the alarm as soon as the temperature begins to rise ... and not when the temperature is too high like a lot of freezer: when the indicator lights up it is already too late

if the smart thermostat gives the alarm at the beginning of the breakdown, we have time to find solutions

if this smart thermostat can also do some energy storage for photovoltaic it's a cherry on the cake
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Re: Vegetable conservation? freezing




by A.D. 44 » 05/09/18, 13:18

It is also not a question of smoking the freezer with too numerous and untimely starts according to the sun sometimes very variable (clouds) ...

But simply a time schedule around the solar noon (where production is potentially the highest) to lower the temperature to-25 ° ... Assuming that it should (at any rate) a sufficient temperature drop at least once a day, as long as this cycle takes place during the day (sun or not) ... The remaining operating time to be determined according to the type of device.

The rest of the time (and especially at night), the maximum temperature would be maintained at -12 °.

Reflection to dig ...
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Gaston
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Re: Vegetable conservation? freezing




by Gaston » 05/09/18, 14:44

chatelot16 wrote:give the alarm as soon as the temperature begins to rise ... and not when the temperature is too high like a lot of freezer: when the light comes on it's already too late
Note also that on most freezers, the alarm does not work in case of power failure : Twisted:
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Re: Vegetable conservation? freezing




by Did67 » 05/09/18, 15:00

AD 44 wrote:It is also not a question of smoking the freezer with too numerous and untimely starts according to the sun sometimes very variable (clouds) ...

But simply a time schedule around the solar noon (where production is potentially the highest) to lower the temperature to-25 ° ... Assuming that it should (at any rate) a sufficient temperature drop at least once a day, as long as this cycle takes place during the day (sun or not) ... The remaining operating time to be determined according to the type of device.

The rest of the time (and especially at night), the maximum temperature would be maintained at -12 °.

Reflection to dig ...


With an A +++, a beast programmer who would start 2 hours before solar noon and 2 or 3 hours later would be enough to optimize the photovoltaic collection. Between each recharge, subject to not opening unexpectedly, inertia and insulation would suffice ...

With possibly "conflicts of use" to manage between washing machine, dishwasher, freezer, etc ...
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Re: Vegetable conservation? freezing




by A.D. 44 » 05/09/18, 15:08

Yes indeed ... With some ice buns inside to bring a little inertia.

It remains to ensure that at no time does the temperature exceed the maximum conservation threshold (-12 ° for example).
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Re: Vegetable conservation? freezing




by Did67 » 05/09/18, 16:33

There are not very expensive recording probes ...

Note that regardless of PV, if the electricity distributors wanted to "restore" to the consumer the low tariffs they have available (for example at night between midnight and 5 am), this could encourage consumption to "smooth out" ...
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Re: Vegetable conservation? freezing




by A.D. 44 » 06/09/18, 20:19

For my information what is your congelo Did67? A Swiss thing starting with "Li ..." made by their Teutonic maneuvers?

I ask you this, because looking on ternet, what I find better in autonomy is this brand.

But by searching the data sheets I can not find a device (even at home) actually exceeding the 25 hours (while the commercial sites announce for these same models up to 35 hours ...).
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Re: Vegetable conservation? freezing




by Did67 » 06/09/18, 21:49

Yes, it starts with Li ... and ends with ... herr. Note: it's Austrian.

Autonomy is, verification made, of ... 74 h!

Screen Shot 09-06-18 at 09.47 PM freeze.PNG
Screen Shot 09-06-18 at 09.47 PM freezing.PNG (31.24 KIO) Accessed 3659 times


Here is the complete file: https://www.liebherr-electromenager.fr/ ... oduct=1103


[Warning: question price, it's a killer! Near 800 euros. The extra cost, at the current price of electricity, is not recoverable. So it's a whim. Others are paying for beautiful cars. I just slammed my C1 LPG and looking for a Clio LPG 3 000 euros. As always, living is a matter of choice.]
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