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Renato RR
14-03-2006, 11:09 AM
I have been in visit of one chiller producer and he claimes that he can produce chiller for -20 C outdor temperature with R 134a,single stage compressor Bitzer.He show me one such chiller and I coud not see enithing spectacular on it only have biger air heat exchanger then one for normal ambient temperature.
Any ideas?

Renato

Peter_1
14-03-2006, 09:50 PM
Sure, why should this be not possible and the fact that R134a is used doens't change anything.

But why then not use a drycooler when it's outside -20C?:confused:

You don't need a chiller at all at this conditions.

NoNickName
15-03-2006, 10:24 PM
Maybe they are claiming it works as a heat pump at -20°C ambient air temperature, which is clearly a marketing blahblah.

Josip
16-03-2006, 11:13 AM
Hello guys,


I have been in visit of one chiller producer and he claimes that he can produce chiller for -20 C outdor temperature with R 134a,single stage compressor Bitzer.He show me one such chiller and I coud not see enithing spectacular on it only have biger air heat exchanger then one for normal ambient temperature.
Any ideas?

Renato

To make money :)


Sure, why should this be not possible and the fact that R134a is used doens't change anything.

But why then not use a drycooler when it's outside -20C?

You don't need a chiller at all at this conditions.

Agree :) But good marketing is to sell something people do not need at all (like fridge to Eskimos)


Maybe they are claiming it works as a heat pump at -20C ambient air temperature, which is clearly a marketing blahblah.

It works but at what efficiency? There are much better solutions but....;)

NoNickName
16-03-2006, 06:11 PM
Yeah, it works. Oops.... I forgot the low pressure switch bridged out.