I want to freeze water as quickly as possible. Let me explain my situation :
I have a setup that holds water which needs to freeze to create a surface of ice on which I will be demonstrating products.
I have a compressor with a pump that runs Glycol in some copper pipes immersed in the water.
This whole setup is great and transportable, but it takes an eternity to freeze around 10L of water (more than 6 hours) and I need it to be faster than that since I will be traveling with it to give demonstrations!!
I am looking for a way of accelerating the freezing process, ideally without having to change the whole setup (I am willing to change a couple of parts or whatnots).