Refrigerant R134a is flowing through a -std type L copper tube in a refrigeration system. In this system, a desuperheater is used to heat water

Refrigerant R134a is flowing through a ¾-std type L copper tube in a refrigeration system. In this system, a desuperheater is used to heat water as shown in Figure P4.3. The R134a enters the desuperheater at 200 psia, 225°F. The desuperheater removes enough energy, QDSH , such that the R134a enters the condenser as a saturated vapor with no appreciable loss in pressure. In the condenser, energy is transferred from the refrigerant at a rate of 60,000 Btu/h. This causes the R134a to leave the condenser as a saturated liquid with a negligble drop in pressure.
Determine the velocity (ft/s) of the R134a as it

(a) enters the condenser and

(b) leaves the condenser.

c=60,000 Btu h Condenser 2 www.i www Desuperheater FIGURE P4.3 Condenser/desuperheater in a refrigeration system. QDSH R134a +P = 200 psia T = 225F