Two-stage refrigeration cycle: a two-stage compression refrigeration system with an adiabatic liquid-vapor separation unit uses refrigerant-134a as the working fluid. the system operates the evaporator at -40oc, the condenser at 800 kpa, and the separator at - 10.1oc. the system is to serve a 30-kw cooling load ( ql ). determine a) the mass flow rate through each of the two compressors, b) the power used by the compressors, and c) the system’s cop. the refrigerant is saturated liquid at the inlet of each expansion valve and saturated vapor at the inlet of each compressor, and the compressors are isentropic.

in physics zero. in muscle fatigue could be high

the answer is b, have negligible mass

d₁ = displacement of tern from arctic to antarctic = 11000 miles

d₂ = displacement of tern from antarctic to arctic =   - 11000 miles

d = total displacement for the journey

total displacement for the journey is given as

d = d₁ + d₂

d = 11000 + (-11000)

d = 0 miles

t₁ = time of travel from arctic to antarctic = 3 months = 3 x 30 days = 90 days

t₂ = time of travel from antarctic to arctic = 3 months = 3 x 30 days = 90 days

t = total time of travel

total time of travel is given as

t = t₁ + t₂

t = 90 + 90

t = 180 days

average velocity is given as

average velocity = total displacement/ total time

v = d/t

v = 0/180

v = 0 miles/day

c) power lifting, will be your answer.

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