The key difference is that evaporators cycle multiple times per hour
for a short period each time... Ok if you have inverter and decent
batteries.
In contrast, cold plate can hold cold for many hours, perhaps only
cycling once or twice per day when you run generator, but for much
longer periods each time.
Which one is best depends on how you generate and store electricity
and how consistent a temperature you want in freezer/refrigerator.
On my trawler, I have lots of batteries and a good inverter plus extra
chargers, so I only run generator once, occasionally twice, a day at
very high amperage into the battery bank, and then use that bank as
the storage source through my inverter the rest of the time. This
allows me to use more flexible evaporator type refrigeration.
Evaporator freezers also get colder than cold plate... good if you
plan on keeping stuff there for a while.
But really, in the end, its all about how you manage electrical energy
on your boat. Presumption is that we all want to minimize genset run
time.
John Marshall
On Dec 4, 2008, at 5:02 PM, Jon Boy aka:TrawlerGuy wrote:
Coldplate refrigeration IS NOT more efficient... It's much less
efficient. However, if running on gen-set only the "holding plate"
does the job of the "battery bank" in an inverter run system.
John
The cold plate is generally a more energy efficient approach to
refrigeration but at the sacrifice of food preservation time.
Personally I feel the preservation time sacrifice doesn't make the
cold plate an attractive option.
John
The key difference is that evaporators cycle multiple times per hour
for a short period each time... Ok if you have inverter and decent
batteries.
In contrast, cold plate can hold cold for many hours, perhaps only
cycling once or twice per day when you run generator, but for much
longer periods each time.
Which one is best depends on how you generate and store electricity
and how consistent a temperature you want in freezer/refrigerator.
On my trawler, I have lots of batteries and a good inverter plus extra
chargers, so I only run generator once, occasionally twice, a day at
very high amperage into the battery bank, and then use that bank as
the storage source through my inverter the rest of the time. This
allows me to use more flexible evaporator type refrigeration.
Evaporator freezers also get colder than cold plate... good if you
plan on keeping stuff there for a while.
But really, in the end, its all about how you manage electrical energy
on your boat. Presumption is that we all want to minimize genset run
time.
John Marshall
On Dec 4, 2008, at 5:02 PM, Jon Boy aka:TrawlerGuy wrote:
> Coldplate refrigeration IS NOT more efficient... It's much less
> efficient. However, if running on gen-set only the "holding plate"
> does the job of the "battery bank" in an inverter run system.
>
> John
>
>
>
>> On Tue, Dec 2, 2008 at 7:26 PM, <johnph@comcast.net> wrote:
>>> The cold plate is generally a more energy efficient approach to
>>> refrigeration but at the sacrifice of food preservation time.
>>> Personally I feel the preservation time sacrifice doesn't make the
>>> cold plate an attractive option.
>>>
>>> John
> _______________________________________________
> http://lists.samurai.com/mailman/listinfo/passagemaking-under-power
>
> To unsubscribe send email to
> passagemaking-under-power-request@lists.samurai.com with the word
> UNSUBSCRIBE and nothing else in the subject or body of the message.
>
> Passagemaking Under Power and PUP are trademarks of Water World
> Productions, formerly known as Trawler World Productions.
