me203fall2010sec2hw1soln

# me203fall2010sec2hw1soln - A.G.Yazcolu B.Tekin ME 203...

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A.G.Yazıcıo ğ lu B.Tekin ME 203 –Thermodynamics - I Fall 2010 Section 2 – Homework 1 Solution 1 – As illustrated in the figure on the right, water circulates through a piping system, servicing various household needs. Considering the water heater as a system, sketch the control volume, identify locations on the system boundary where the system interacts with its surroundings (through mass flows and energy transfers), and describe events within the system. Repeat all for the dishwasher, the shower, and the whole house. Solution: For the water heater: Considering water heater as a system, as given in the figure on the left, cold water enters the system at location 1 and hot water exits the system at location 2. The electrical energy input to the water heater is work input. Warm surfaces of the water heater interact with the surroundings, and result in heat loss. For the dishwasher: Hot water enters the dishwasher at location 1 and dirty water exits the dishwasher through the drain lines (location 2). Warm surfaces of the dishwasher interact with the surroundings (heat

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## This note was uploaded on 11/11/2010 for the course ME me205 taught by Professor Almilayazıcıoğlu during the Spring '10 term at Middle East Technical University.

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me203fall2010sec2hw1soln - A.G.Yazcolu B.Tekin ME 203...

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