Solution Found!
Energy Analysis of Control Volumes at Steady StateAs
Chapter 4, Problem 78P(choose chapter or problem)
As sketched in Fig. P4.78, a condenser using river water to condense steam with a mass flow rate of \(2 \times 10^5 \mathrm{~kg} / \mathrm{h}\)V from saturated vapor to saturated liquid at a pressure of 0.1 bar is proposed for an industrial plant. Measurements indicate that several hundred meters upstream of the plant, the river has a volumetric flow rate of \(2 \times 10^5 \mathrm{~m}^3 / \mathrm{h}\) and a temperature of \(15^{\circ} \mathrm{C}\). For operation at steady state and ignoring changes in kinetic and potential energy, determine the river-water temperature rise, in \({ }^{\circ} \mathrm{C}\), downstream of the plant traceable to use of such a condenser, and comment.
Questions & Answers
QUESTION:
As sketched in Fig. P4.78, a condenser using river water to condense steam with a mass flow rate of \(2 \times 10^5 \mathrm{~kg} / \mathrm{h}\)V from saturated vapor to saturated liquid at a pressure of 0.1 bar is proposed for an industrial plant. Measurements indicate that several hundred meters upstream of the plant, the river has a volumetric flow rate of \(2 \times 10^5 \mathrm{~m}^3 / \mathrm{h}\) and a temperature of \(15^{\circ} \mathrm{C}\). For operation at steady state and ignoring changes in kinetic and potential energy, determine the river-water temperature rise, in \({ }^{\circ} \mathrm{C}\), downstream of the plant traceable to use of such a condenser, and comment.
ANSWER:
Solution 78P
Step 1 of 7
Here our aim is to determine the rise in temperature of the river water in a condenser which is operating in steady-state.