Register to reply

Calculate refrigerant temp inside evaporator based on exit temp and pressure

by bobboviking
Tags: based, evaporator, exit, inside, pressure, refrigerant, temp
Share this thread:
Sep12-11, 08:01 AM
P: 6
Hi guys,

I'm stuck on some thermodynamic calculations and I would really appreciate some help!

I'm trying to calculate the refrigerant temperature inside of an evaporator (two-phase lumped parameter model) based on the exit temperature of the evaporator and the pressure.
I've understood that the refrigerant temperature in phase 1 (fluid) may be expressed as
Tr1 = T(Pe) (temperature as a function of evaporator pressure)

and the refrigerant temperature in phase 2 (vapor) may be expressed as
Tr2 = T(Pe,he2) (temperature as a function of evaporator pressure and enthalpy in the second region)

But I'm not quite getting how to do that after measuring the exit temperature and evaporator pressure (I'm assuming constant pressure in the evaporator). I've got a refrigerant table (see attachment) but I'm not sure how to use it.

I would really appreciate if you could point me in the correct direction!

Thanks in advance,
Attached Files
File Type: pdf Suva407C (2).pdf (413.0 KB, 3 views)
Phys.Org News Partner Physics news on
How did evolution optimize circadian clocks?
New webcast series brings cutting-edge physics talks to the world
High Flux Isotope Reactor named Nuclear Historic Landmark

Register to reply

Related Discussions
Difference between Effective Temp and Actual Surface Temp is due to what? Earth 3
Why does the refrigerant in an air-conditioner's evaporator become cold? General Engineering 15
Exit Temp / Heat Loss in External Pipework General Engineering 1
Chemistry: 2 samples of the same liquid but different temp - final temp? Biology, Chemistry & Other Homework 9
Calculate Temp. Introductory Physics Homework 0