Propane gas (C3H8) at 25C, 1 atm and a volumetric flow

Chapter 13, Problem 13.106

(choose chapter or problem)

Propane gas (\(\\mathrm{C}_{3} \mathrm{H}_{8}\)) at \(25^{\circ} \mathrm{C}\), 1 atm and a volumetric flow rate of \(0.03 \mathrm{~m}^{3} / \mathrm{min}\) enters a furnace operating at steady state and burns completely with 200% of theoretical air entering at \(25^{\circ} \mathrm{C}\), 1 atm. The furnace provides energy by heat transfer at \(227^{\circ} \mathrm{C}\) for an industrial process and combustion products at \(227^{\circ} \mathrm{C}\), 1 atm for cogeneration of hot water. For the furnace, determine

(a) the rate of heat transfer, in kJ/min, and

(b) the rate of entropy production, in \(\mathrm{kJ} / \mathrm{K} \cdot \min\).

(c) Also devise and evaluate an exergetic efficiency for the furnace relative to the environment of Table A-26 (Model II). Ignore the effects of motion and gravity.