On Wed, 02 Jan 2019 13:36:27 -0000, trader_4 wrote:

On Tuesday, January 1, 2019 at 4:07:50 PM UTC-5, Commander Kinsey wrote:
On Tue, 01 Jan 2019 10:28:51 -0000, alan_m wrote:

On 31/12/2018 21:44, William Gothberg wrote:

It's a perfectly valid question, why are we still using equipment that
needs running so often?

Proportional control rather than bang/bang control?

If the insulation was better than that used 30 years ago, then the time between switching off and back on again would be longer, as less cold would leak out - this can be verified by observing the sides are cold. Also, if you look at the energy ratings on various freezers, you'll find a factor of almost 4 between different models, so clearly some are using really **** insulation.

Another incorrect conclusion. It's also very likely that newer fridges
maintain temperature more accurately than old ones. New ones, for example,
mostly have electronic controls now and don't rely on an old bi-metal
thermostat design. To maintain temperature closer, the off time would
be shorter, regardless of the insulation.

I observe newer models running for the same sort of time and the same sort of duty cycle. Ok, the compressor is using less power while running, but judging by the rate it cools down when you first switch it on, the output of the compressor is the same as with the older ones. So, the same duty cycle means that the same amount of cold is lost from new ones as old ones, ergo the insulation has not been improved.

And you haven't responded to "Also, if you look at the energy ratings on various freezers, you'll find a factor of almost 4 between different models."
Here's the link again: https://www.sust-it.net/energy-savin...freezers-large

On 1/2/2019 11:15 AM, Commander Kinsey wrote:
On Wed, 02 Jan 2019 13:36:27 -0000, trader_4 wrote:

On Tuesday, January 1, 2019 at 4:07:50 PM UTC-5, Commander Kinsey wrote:
On Tue, 01 Jan 2019 10:28:51 -0000, alan_m
wrote:

On 31/12/2018 21:44, William Gothberg wrote:

It's a perfectly valid question, why are we still using equipment
that
needs running so often?

Proportional control rather than bang/bang control?

If the insulation was better than that used 30 years ago, then the
time between switching off and back on again would be longer, as less
cold would leak out - this can be verified by observing the sides are
cold.* Also, if you look at the energy ratings on various freezers,
you'll find a factor of almost 4 between different models, so clearly
some are using really **** insulation.

Another incorrect conclusion.* It's also very likely that newer fridges
maintain temperature more accurately than old ones.* New ones, for
example,
mostly have electronic controls now and don't rely on an old bi-metal
thermostat design.* To maintain temperature closer, the off time would
be shorter, regardless of the insulation.

I observe newer models running for the same sort of time and the same
sort of duty cycle.* Ok, the compressor is using less power while
running, but judging by the rate it cools down when you first switch it
on, the output of the compressor is the same as with the older ones.
So, the same duty cycle means that the same amount of cold is lost from
new ones as old ones, ergo the insulation has not been improved.

And you haven't responded to "Also, if you look at the energy ratings on
various freezers, you'll find a factor of almost 4 between different
models."
Here's the link again:
https://www.sust-it.net/energy-savin...freezers-large

On Wed, 02 Jan 2019 19:15:54 -0000, Bob F wrote:

On 1/2/2019 11:15 AM, Commander Kinsey wrote:
On Wed, 02 Jan 2019 13:36:27 -0000, trader_4 wrote:

On Tuesday, January 1, 2019 at 4:07:50 PM UTC-5, Commander Kinsey wrote:
On Tue, 01 Jan 2019 10:28:51 -0000, alan_m
wrote:

On 31/12/2018 21:44, William Gothberg wrote:

It's a perfectly valid question, why are we still using equipment
that
needs running so often?

Proportional control rather than bang/bang control?

If the insulation was better than that used 30 years ago, then the
time between switching off and back on again would be longer, as less
cold would leak out - this can be verified by observing the sides are
cold. Also, if you look at the energy ratings on various freezers,
you'll find a factor of almost 4 between different models, so clearly
some are using really **** insulation.

Another incorrect conclusion. It's also very likely that newer fridges
maintain temperature more accurately than old ones. New ones, for
example,
mostly have electronic controls now and don't rely on an old bi-metal
thermostat design. To maintain temperature closer, the off time would
be shorter, regardless of the insulation.

I observe newer models running for the same sort of time and the same
sort of duty cycle. Ok, the compressor is using less power while
running, but judging by the rate it cools down when you first switch it
on, the output of the compressor is the same as with the older ones.
So, the same duty cycle means that the same amount of cold is lost from
new ones as old ones, ergo the insulation has not been improved.

And you haven't responded to "Also, if you look at the energy ratings on
various freezers, you'll find a factor of almost 4 between different
models."
Here's the link again:
https://www.sust-it.net/energy-savin...freezers-large

Your reply is missing.