A fuel gas of 73 mol% ethane and the balance propane is burned continuously with 69% excess air to provide energy to a boiler to generate steam. In the combustion process, 86% of the ethane and 75% of the propane are burned. If 22 mol/s of the fuel gas are fed to the combustion chamber at 1 atm and 25 C, the product gases emerge at these same conditions, what is the maximum rate of heat supply to the boiler (positive quantity) in MW (1 MW = 1 megawatt = 106 W)? Assume the H2O produced in the combustion process leaves as liquid water and the rest of the components are in the gas/vapor phase. Show all work, cite all sources, state all assumptions. Report answer in MW with 3 digits of precision in decimal format.

A Gas Is Contained In A Cylinder Fitted With A Movable Piston As Shown Below. The Initial Gas Temperature Is T-25 °C. The Cylinder Is Placed In Boiling Water With The Piston Held In A Fixed Position. Heat ( In The Amount Of 2.00 Kcal Is Transferred To The Gas, Which Equilibrates At 100 °C. The Piston Is Then, Released, And The Gas Does 100 J Of Work In Moving The Piston To Its New Equilibrium Position. The Final T-100 °C (A) Write The Energy Balance Equation For Intemal Energies, Heat And Work For Each Of The Two Steps Of This Process (B)In Each Of The Case, Solve For The Unknown Energy Term In The Equation. Express All Energies In Joules. Assume: Neglect The Change In Potential Energy The Gas Behaves Ideally ·1kcal = 4184 J Clamp Boiling Water Boiling Water

A heat transfer oil (specific heat = 0.454 kcal/kg °C) leaving a hydraulic system at a rate of 10,000 kg/h at 85°C has to be cooled to 50°C before it can be circulated back to the system. It is desired to determine whether an existing 1-2 pass exchanger having an area of 15 m² would be suitable. Water is available at 30°C and must not be heated to above 38°C. An overall heat transfer coefficient (including the dirt factor) of 400 kcal/h m² °C can be attained in the exchanger. Water flows through the shell and the oil through the tubes. How will the heat transfer rate and the exit oil temperature be affected if the water flow rate is increased by 20%? The overall heat transfer coefficient U is assumed to remain unchanged.

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