A bio-reactor is kept at 45°C on a day where the outside is 20°C. It is...

A bio-reactor is kept at 45°C on a day where the outside is 20°C. It is estimated that the bio-reactor loses 12 kW to the ambient. Waste heat at 450 K from an engine is used to deliver the heat to the bio-reactor. Find the destruction of exergy and where it is made.
The condenser in a power plant cools 10 kg/s water at 10 kPa, quality 90%, so it comes out as saturated liquid at 10 kPa. The cooling is done by ocean water coming in at ambient 15°C and returned to the ocean at 20°C. Find the second-law efficiency of the condenser.

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samet mamat answered 7 months ago

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