p j m of the pulsating rectum rites:

Do you ever get tired of fantasizing your incredibly stupid
and incorrect ideas of how reality works , Nick ? And inventing
numbers to 'prove' your lunacies ?

Nope. What's wrong with this one, in your opinion?

A 2'x2'x8' tall R20 34 F fridge in a 70 F room needs (70-34)80ft^2/R20 = 136
Btu/h or 3456 Btu/day of coolth, or 17,280 Btu for 5 days, which might come
from at least 17280/144 = 120 pounds of ice in an outdoor box, with a large
water tray with a copper pipe in the freezer compartment, with free airflow
to the fridge below and a liquid thermosyphoning loop to move coolth in from
the box. Can the loop stop working before it freezes the fridge contents?

The ice box might be 2'x2'x8' tall, with a 55 gallon drum packed with 100
2 liter water bottles surrounded by an antifreeze solution thermosyphoning
through an old 800 Btu/h-F auto radiator above with an 8' chimney above.
Cold air might enter the radiator and flow out at the top of the chimney.

A couple of fans and pumps could make it more compact and easier to design,
with more power and cost and less reliability. Still practical, but less fun.

Nick