i understand somewhat the practice of the temp/pressure charts but does the addtion of 30 degrees to ambient temp for the high side pressure for r22 also work the same for other freons? i work with units containing r22, r404a, r502, and r409. and just to make sure i understand completely, can you please explain how to use the temp/pressure chart? and any websites that can benefit would be great. i took a study course but it was limited in information on certain subjects. thanks
2006-06-30 15:15:42 · 2 answers · asked by Anonymous in Science & Mathematics ➔ Engineering
I assume this refers to a rule of thumb difference of 30deg F between the condensing freon and the ambient air temperature. This difference is likely with all the freons but could vary with loading of the system and condition of the condenser. In terms of basic physics it is the heat to be transferred, the heat transfer coefficient and the heat transfer area that determine the temperature difference and it is the temperature and type of freon that determines its condensing pressure.
2006-06-30 16:05:53 · answer #1 · answered by Robert A 5 · 0⤊ 0⤋
try to look for a mollier's chart maybe try also to look for a thermodynamics book it will explain more
2006-07-14 13:11:55 · answer #2 · answered by Romel c 2 · 0⤊ 0⤋