Homework Solution

TQ 9-5

Difficulties in using waste heat from a utility to provide heating for buildings in a city some distance away.

• Waste heat will have a relatively small temperature difference from the surroundings, and
   
• loss of heat energy during transmission will further reduce the temperature difference.
   

Why not raise the temperature of the outgoing water?

• Raising the temperature of the cold sink will decrease the efficiency of the utility's production of electricity.