Methane enters a heat exchanger at a volumetric flow rate of 105.0 m3/min, at a pressure of 1.013 bar and temperature of 35.0°C. At these conditions, the specific enthalpy of methane is 21.462 kJ/kg. The methane leaves the heat exchanger at a pressure of 1.013 bar and temperature of 60.0°C. The corresponding specific enthalpy at these conditions is 78.656 kJ/kg. The methane is heated by a stream of saturated steam entering the heat exchanger at 1.8 bar and leaving as a liquid at 56°C. Find the volumetric flow rate of saturated steam into the heat exchanger by following the steps below.
What is the mass flow rate of methane into the heat exchanger?
in [kg methane/min]
What rate of heat is supplied to the methane stream in order to heat it from 35.0°C to 60.0°C?
in [kW]
What is the minimum mass flow rate of saturated steam into the heat exchanger?
in [kg sat. steam/min]
What is the volumetric flow rate of saturated steam into the heat exchanger?
in [m^3 sat. steam/min]