Question: We are considering cooling a process gas stream in a propane chiller and rejecting the heat into the environment using a propane condenser as shown

We are considering cooling a process gas stream in a propane

We are considering cooling a process gas stream in a propane chiller and rejecting the heat into the environment using a propane condenser as shown in the diagram below. Propane is used as the refrigerant (working fluid). The stream S1 exiting the propane chiller is saturated vapor at -20 deg C and the stream S3 exiting the propane condenser is saturated liquid at 40 deg C. The compressor efficiency is 80% and the refrigerant flow rate 1000kmol/hr. To improve the cycle, a heat exchanger (usually called Sub-Cool Economizer shown in the diagram below) further cools the refrigerant 2 deg C below its bubble point using an external process stream. Calculate the coefficient of performance (COP) of the cycle. Assume that propane follows the Peng-Robinson Equation of State. Round your numerical answer into two decimal digits

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