bersaga
07-10-2003, 05:27 AM
What are the repercussions of using R 407C for a medium temperature refrigeration application ? I'm aware of the temperature glide of 6-8K and possible fractionation that happens with this refrigerant. How about design and field issues ?
Design : Evaporator and Condensor selection - need to oversize ?
Field : Leakages - how do you manage this ?
Some air-conditioning manufacturers claim that R 407 C is a very efficient refrigerant because of the glide - the compressor suction 'sees' a higher suction temperature and so does not have to 'work ' as hard as say, if R22 is used. But then in the condensor, the condensing temperature also progressively drops and may approach the ambient - so you may need a higher design condensing temperature - and off goes your efficiency advantage , right ?
Any views/assistance appreciated ?:(
Design : Evaporator and Condensor selection - need to oversize ?
Field : Leakages - how do you manage this ?
Some air-conditioning manufacturers claim that R 407 C is a very efficient refrigerant because of the glide - the compressor suction 'sees' a higher suction temperature and so does not have to 'work ' as hard as say, if R22 is used. But then in the condensor, the condensing temperature also progressively drops and may approach the ambient - so you may need a higher design condensing temperature - and off goes your efficiency advantage , right ?
Any views/assistance appreciated ?:(