Problem Graphic

Austin's dad likes to take a long shower in the morning. Austin needs to find some way to get him out more quickly.

What is known:

• Austin's dad takes a 15-minute shower every morning.
• The average flow rate through the shower head is 10 L/min.
• An electric water heater heats the water from 15^oC to 60^oC and then mixes it with cold water to 40^oC at a T-elbow before it is sent to the shower head.

How much entropy is generated by Austin's father when he takes his daily shower?

• Take the electric heater and the T-elbow pipe together as a control volume.
• Consider the mass balance and entropy balance of the control volume simultaneously.