remission
03-16-2006, 09:58 PM
Me and a couple guys from class have been racking our brains on this question for hours, any idea would be helpful
Here is a original question with a graphic description (http://members.toast.net/art.ross/General_Physics/PHY202/Level%20II%20Homework/Chapter%2019%20&%2020/Winter_2006.doc)
In the Stirling cycle illustrated below, process ab is an isothermal compression, process bc is heating at constant volume, process cd is an isothermal expansion, and process da is cooling at constant volume. Find the efficiency of the Stirling cycle in terms of the temperatures Th and Tc, and the volumes Va and Vb.
----------Given Equations----------
Efficentcy = (T(h) - T(c)) / T(h)
Heat transfer: |Q(c)| / |Q(h)| = T(c) / T(h)
Q(h/c) = nrt(h/c)* LN(v2/v1)
From this we've found that
Efficentcy = (t(h)LN(v2/v1) - t(c)LN(v2/v1)) / t(h)LN(v2/v1)
But this may not be correct because we assumed that
|Q(c)| = T(c) and |Q(h)| = T(h)
Here is a original question with a graphic description (http://members.toast.net/art.ross/General_Physics/PHY202/Level%20II%20Homework/Chapter%2019%20&%2020/Winter_2006.doc)
In the Stirling cycle illustrated below, process ab is an isothermal compression, process bc is heating at constant volume, process cd is an isothermal expansion, and process da is cooling at constant volume. Find the efficiency of the Stirling cycle in terms of the temperatures Th and Tc, and the volumes Va and Vb.
----------Given Equations----------
Efficentcy = (T(h) - T(c)) / T(h)
Heat transfer: |Q(c)| / |Q(h)| = T(c) / T(h)
Q(h/c) = nrt(h/c)* LN(v2/v1)
From this we've found that
Efficentcy = (t(h)LN(v2/v1) - t(c)LN(v2/v1)) / t(h)LN(v2/v1)
But this may not be correct because we assumed that
|Q(c)| = T(c) and |Q(h)| = T(h)