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I use ice water to cool my 14" LX200. I have coiled 12mm hose around the OTA, with cold water pumped through using a 12volt bilge pump in a large esky.
Have the esky half full of water and add 3 x 2 litre frozen containers, and can have the mirror to ambient in 1 hour.
I have got a temperature sensor mounted on the rear of the primary mirror. I can image planets while the pump is going. There is not any vibration as the pump is centrifugal with no pulses, but just a steady stream of water being pumped.
This setup doesn't require much power and is ideal for me where I don't have any mains electricity.
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