The Evaporating Temp Of R407c

[acfrigoman]

Hello

Dear Colleagues

I need to know the evaporating temperature used in heat pump split system air conditioner (9000 btu 18000btu) using R407C.

Also I need to know if there is a special way to fill the unit by R407C.

Thanks.

[Brian_UK]

To fill system with R407C you must charge it in the liquid state.

[NoNickName]

There is no unique "evaporating temperature" because R407c is zeotropic, and it shows a glide between dew point and bubble point.
As a rule of thumb, mid point evap temp is usually 10 to 12°K below ambient temperature in heat pump mode.

[acfrigoman]

Thanks Brian And Nonickname For Your Help.

Regards

[lraja]

R407c is a zoetropic blend of R32/R125/R134a, where the three refrigerants have non-similar boiling points. As a result, R407c gas a temperature glide of about 7 deg C at 100 kPa. Further the magnitude of temperature glide depends on the pressure as well in such a way that one gets a smaller temperature glide in the condenser than in the evaporator.

In addition, composition shift of R407c during phase change affect the magnitude of temperature glide so that the actual magnitude of glide during running is system specific.

lraja

[acfrigoman]

hi Iraja

thank u for your usuful information about composition

of R407c and it caracteristique.
said