Over the last few months Ive been putting together a portable temprite system. Fridge mechanic by trade so getting the parts and stuff together wasnt a real drama though my carpentry skills are a bit lacking 
For people who dont know what a temprite is, basically its a big can of refrigerant with a coil of stainless steel in it that the beer passes through. As the warm beer transfers its heat to the refrigerant it boils of (beer becomes cold) and the vapour pressure (bascially the temp you want the beer to be at) is maintained by a regulator (750 valve). When the valve reaches its desired pressure it lets the refrigerant vapour pass through to the compressor that then compresses it and turns it back into a liquid (via a condensor) and put its back into the temprite can. Highly efficient system and can pull any temp liquid down to 0deg C or lower if need be. My system runs a 1.5kw compressor with R134a and can pour about a litre a minute of 25deg C beer down to 2deg C. These temprites used to be in bars everywhere under the counters but are now moving to glycol system due to the cost of refrigerant.
For people who dont know what a temprite is, basically its a big can of refrigerant with a coil of stainless steel in it that the beer passes through. As the warm beer transfers its heat to the refrigerant it boils of (beer becomes cold) and the vapour pressure (bascially the temp you want the beer to be at) is maintained by a regulator (750 valve). When the valve reaches its desired pressure it lets the refrigerant vapour pass through to the compressor that then compresses it and turns it back into a liquid (via a condensor) and put its back into the temprite can. Highly efficient system and can pull any temp liquid down to 0deg C or lower if need be. My system runs a 1.5kw compressor with R134a and can pour about a litre a minute of 25deg C beer down to 2deg C. These temprites used to be in bars everywhere under the counters but are now moving to glycol system due to the cost of refrigerant.
