[Bored chemist]

You cannot seem to get your head around the requirement to design such a tool which works with everyone's freezers, including those which are run at colder than -21.12C.

Imagine the disappointment of someone who gets a freezer-baton only to discover - oh sorry, this tool will not work with your freezer running at -22C because the idiots who designed it had used salt water as a coolant!

So, you accept that you have failed.
Your device won't work in Clifford's fridge at -5.
But if you make ice in his fridge and pump salt water over it, the temperature will drop to about 20 below. That's good enough (or if it isn't then your idea is doomed anyway).
Also, for a given weight , ice will provide more cooling capacity. It will do this no matter how many times you ignore the fact.

"But ice in a coolant pipe can block the flow of coolant, so that's why salt water is not suitable as a coolant where freezing is an issue."
Well, don't put it there then. Did you think that was a valid point?

It seems you are still no Galileo.
And you still haven't answered my other question- the one I asked in the other thread.

Here's a copy.
BTW, is this you?http://www.dailyrecord.co.uk/news/uk-world-news/meet-the-lonely-heart-from-hell-1079428

[cheryl j]

I don't know if there is a huge market for wart removal, but there is for age spots, and if it works on that, he might have something pretty marketable, since most people do not have a container of liquid nitrogen or a laser at home.

[alancalverd]

I don't know if there is a huge market for wart removal, but there is for age spots, and if it works on that, he might have something pretty marketable, since most people do not have a container of liquid nitrogen or a laser at home.

Quick way to find out: take a fresh ice cube from your freezer and put it on your granny's hand.