In: Physics
Five kilograms of ammonia (NH3) undergo a refrigeration
cycle
detailed as:
• Process 1-2: isothermic expansion from saturated vapor at 10ºC,
to P = 3 bar with
Q = 400 kJ.
• Process 2-3: isochoric cooling to 0 ◦C.
• Process 3-4: isobaric compression.
• Process 4-1: isochoric heating.
Calculate:
a) the P −v and T −v diagrams.
b) the states table detailing P, v, T and u.
c) the process table for Q, W and ∆U.
d) the performance coefficient, β, of the cycle.