Final answer:
Without comprehensive system data, an exact quantity of residual refrigerant vapor in a 350-ton R-123 chiller at 0 psig cannot be determined. Thermodynamic calculations or refrigeration analysis software are required for a precise measurement.
Step-by-step explanation:
The question relates to the residual refrigerant vapor left in a 350-ton R-123 chiller after the liquid refrigerant has been removed at 0 psig. While the answer to this question would typically require complex calculations involving the properties of the refrigerant R-123 and the specific design of the chiller, it may not be possible to provide an exact value without additional data such as the volume of the chiller, the ambient temperature, and the specific heat capacities involved.
Typically, chillers are designed with a refrigerant charge that perfectly matches their cooling capacity, and the remaining refrigerant vapor at 0 psig would be dependent on the temperature and volume left in the system. In professional refrigeration engineering practice, detailed thermodynamic calculations and knowledge of the system's specific properties would be used to determine the exact amount of vapor remaining.
Without specific figures, professional estimations can be made using the Pressure-Enthalpy (P-H) diagram for R-123 or software designed for refrigeration system analysis. However, as an approximation, a significant proportion of the refrigerant charge would be in vapor form at 0 psig, if, say, the chiller were meant to operate at atmospheric conditions