Solution Found!
Repeat the previous problem with the substancesa. R-134ab.
Chapter 2, Problem 49HP(choose chapter or problem)
Problem 49HP
Repeat the previous problem with the substances
a. R-134a
b. R-410a
REFERENCE PROBLEM:
In your refrigerator, The working substance evaporates from liquid to vapor at -200C inside a pipe around the cold section. Outside on the back or below is a black grille, inside of which the working substance condenses from vapor to liquid at +450C. For each location, find the pressure and the change in specific volume (v) if the substance is ammonia.
Questions & Answers
QUESTION:
Problem 49HP
Repeat the previous problem with the substances
a. R-134a
b. R-410a
REFERENCE PROBLEM:
In your refrigerator, The working substance evaporates from liquid to vapor at -200C inside a pipe around the cold section. Outside on the back or below is a black grille, inside of which the working substance condenses from vapor to liquid at +450C. For each location, find the pressure and the change in specific volume (v) if the substance is ammonia.
ANSWER:
Solution 49 HP
a.)
Step 1 of 4
We have to find the pressure and the change in the specific volume() of R-134a condensing from vapor to liquid at +45oC and evaporating from liquid to vapor at -20 oC.
The pressure and change in the specific volume of R-134a condensing from vapor to liquid at +45 oC can be found from the Table B.5.1
Therefore, the pressure and the change in specific volume () of R-134a condensing from vapor to liquid at +45 oC c are 1160.2 kPa and 0.01650 m3/kg.