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Diffstat (limited to '3878/CH25/EX25.3')
| -rw-r--r-- | 3878/CH25/EX25.3/Ex25_3.sce | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/3878/CH25/EX25.3/Ex25_3.sce b/3878/CH25/EX25.3/Ex25_3.sce new file mode 100644 index 000000000..02247dcae --- /dev/null +++ b/3878/CH25/EX25.3/Ex25_3.sce @@ -0,0 +1,16 @@ +clear +// +// Variable declaration +// From example 25.2 +Q=16.4// Total load in kW +T_in=33// The temperature at liquid R134a enters the expansion valve in °C +T_out=9// The temperature at liquid R134a leaves the cooler in °C +T_e=5// The temperature at which liquid R134a evaporates in °C + +// Calculation +h_v=405.23// Enthalpy of R134a,superheated to 9 C in kJ/kg +h_f=246.71// Enthalpy of liquid R134a at 33 C in kJ/kg +Re=h_v-h_f// Refrigerating effect in kJ/kg +m_r=Q/Re// Required refrigerant mass flow in kg/s +printf("\n Required refrigerant mass flow=%0.3f kg/s",m_r) + |