How to cool a container of 500 ml of water to 6 degrees?

Question

Electronics

Hello everyone,
there is a need to cool a container of up to 500 ml of water to 6 degrees.
Tell me if there are real, not capacious and cheap alternatives to Peltier, and if not, how realistic is it?
Add. Question: maybe you have seen schemes for implementing the cooling of a bath / box of water?
In this case, we are talking about a sprayer (ultrasound) of pre-chilled water.
Thanks

Answer 1

Cool wording: "cool a container of 500 ml to 6 degrees."
1. What is the starting temperature?
2. For how long?
3. What are the environmental conditions and how is this water isolated from it?
4. How long should this unit run continuously?
Fill in the boundary conditions, in short.
To make it clear: in order to cool 0.5 kg of water from 26 to 6 degrees, 42,000 J of energy must be taken from it. If you do this in a second, then you will need an industrial cooling unit, if in an hour, 3-4 78 watt pellets will suffice.

Answer 2

Who prevents to make a mini refrigerator - the carnot cycle seems to be not such a complicated thing. You compress with a compressor - heat is released - you cool the compressed - the compressed expands - heat is absorbed.

Answer 3

Of course, we are talking about 6 degrees Celsius and not Kelvin?
Skolhozte from an ordinary refrigerator (buy the smallest for 4t.r. and disassemble or find a used one), you will have to tinker with the temperature controller a little

Answer 4

They say that you need to turn on the "cold light" ... and ... heat the object (=cool down in the end).
But what it is - I don't know!)))