Soru
2. A Carnot heat engine receives heat at the rate of 74,000kJ/min from a high-temperature source at 510^circ C If the maximum possible power output of the engine is 653 kW, find the temperature of the low.temperature sink in which the engine rejects heat (15pts) Assumptions: The system operates steadily.
Çözüm
3.2
(236 Oylar)
Zeliş
Elit · 8 yıl öğretmeni
Uzman doğrulaması
Cevap
To find the temperature of the low-temperature sink, we can use the Carnot efficiency equation:
where:-
is the Carnot efficiency,-
is the temperature of the cold reservoir (sink),-
is the temperature of the hot reservoir (source).Given:- The heat input rate (
) is
,- The power output (
) is
,- The temperature of the hot reservoir (
) is
.First, convert the heat input rate to power:
The Carnot efficiency is also given by:
Substitute the given values:
Now, use the Carnot efficiency equation to find
:
Rearrange to solve for
:
Convert
to Kelvin:
Now, calculate
:
Convert
back to Celsius:
Therefore, the temperature of the low-temperature sink is approximately
.