PDA

View Full Version : C&G 6127 Help needed







patrick1945
17-06-2013, 03:41 PM
Hi, I am new to refrigeration and and not in the industry yet, I am self funding to pass the second year exam due in a weeks time, I have a test question that I cannot work out and I have no further college time before the day.

What is the condition known as "saturated two phase mixture ?" I think it may be to do with blends but I am shooting in the dark as it appears to be a contadiction in terms, any help most gratefully received,

kindest regards

Patrick

patrick1945
09-07-2013, 12:11 AM
Stunning silence chaps ! no sweat i found it in the pressure enthalpy chart.

Rob White
09-07-2013, 11:18 AM
Hi, I am new to refrigeration and and not in the industry yet, I am self funding to pass the second year exam due in a weeks time, I have a test question that I cannot work out and I have no further college time before the day.

What is the condition known as "saturated two phase mixture ?" I think it may be to do with blends but I am shooting in the dark as it appears to be a contadiction in terms, any help most gratefully received,

kindest regards

Patrick


Pat I have just seen this thread???

A saturated mixture is where the liquid and vapour are present.
It could be described as when the liquid is boiling (evaporating)
or when the vapour is condensing.

Two phase, two state and saturated all describe the refrigerant
in liquid and vapour form , together.

Regards

Rob

.

Rob White
09-07-2013, 11:25 AM
Hi, I am new to refrigeration and and not in the industry yet, I am self funding to pass the second year exam due in a weeks time, I have a test question that I cannot work out and I have no further college time before the day.

What is the condition known as "saturated two phase mixture ?" I think it may be to do with blends but I am shooting in the dark as it appears to be a contadiction in terms, any help most gratefully received,

kindest regards

Patrick


All refrigerants saturate, but blends saturate over
a wider temperature range.

Take water for example we understand water because it
boils or saturates at 100 degC (at atmospheric pressure at sea level).
A blended refrigerant is made up of two or more individual ones
and they might have slightly different saturation temps.

Some of them, R407 for example has nearly 7 deg's glide. When it saturates
it does so over nearly 7 deg's, thats like saying water boils at 100 degC all the way through to 107 degC.

Regards

Rob

.