Question

Task 4.1: Basic cycle For a process with the refrigerant R290 the condensation temperature $\theta_c = 35 \degree C$ and the evaporation temperature $\theta_v = -30 \degree C$ are given. The requested refrigeration capacity is $\dot{Q}_0 = 10 kW$. The flow chart with the four points of state depicts the simplest setup of a compression refrigeration machine. Determine: a) $p, \rho, h$ for all points of state as well as the specific volume at the suction side of the compressor (List values in a table!) b) refrigerant mass flow c) refrigerant volume flow at the suction side of the compressor d) theoretical compressor power e) condensation capacity f) specific volumetric refrigeration capacity g) theoretical coefficient of performance $p_{n1}, \rho_{n1}, h_{n1}, v_1$ $m_R$ $V_1$ $P_{th}$ $\dot{Q}_c$ $\dot{q}_{0,v} = \dot{Q}_0/v_1$ $COP_{th}$

          Task 4.1: Basic cycle
For a process with the refrigerant R290 the condensation temperature $\theta_c = 35 \degree C$ and the
evaporation temperature $\theta_v = -30 \degree C$ are given.
The requested refrigeration capacity is $\dot{Q}_0 = 10 kW$. The flow chart with the four points of state
depicts the simplest setup of a compression refrigeration machine.
Determine:
a) $p, \rho, h$ for all points of state as well as the specific volume
at the suction side of the compressor (List values in a table!)
b) refrigerant mass flow
c) refrigerant volume flow at the suction side of the compressor
d) theoretical compressor power
e) condensation capacity
f) specific volumetric refrigeration capacity
g) theoretical coefficient of performance
$p_{n1}, \rho_{n1}, h_{n1}, v_1$
$m_R$
$V_1$
$P_{th}$
$\dot{Q}_c$
$\dot{q}_{0,v} = \dot{Q}_0/v_1$
$COP_{th}$

Task 4.1: Basic cycle
For a process with the refrigerant R290 the condensation temperature = 35 C and the
evaporation temperature = -30 C are given.
The requested refrigeration capacity is Q̇0 = 10 kW. The flow chart with the four points of state
depicts the simplest setup of a compression refrigeration machine.
Determine:
a) p, ρ, h for all points of state as well as the specific volume
at the suction side of the compressor (List values in a table!)
b) refrigerant mass flow
c) refrigerant volume flow at the suction side of the compressor
d) theoretical compressor power
e) condensation capacity
f) specific volumetric refrigeration capacity
g) theoretical coefficient of performance
pn1, ρn1, hn1, v1
mR
V1
Pth
Q̇c
q̇0,v = Q̇0/v1
COPth

Added by Krista W.

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