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