A manufacturing facility has a production line to fill its air conditioning
systems with liquid refrigerant-134a. A throttling valve is used to
pressure of refrigerant-134a before filling. If
the throttling valve is replaced by a turbine, which can generate
power, how mach can this turbine save in electricity cost?
What is known:
- Refrigerant-134a is at 0.3 MPa after throttling.
- Refrigerant-134a is
at -4oC and 1 MPa before throttling.
- The mass flow rate of refrigerant-134a is 200 kg/s.