TY - JOUR
T1 - Comparative performance analysis of a simplified Curzon-Ahlborn engine
AU - Páez-Hernández, Ricardo T.
AU - Chimal-Eguía, Juan Carlos
AU - Ladino-Luna, Delfino
AU - Velázquez-Arcos, Juan Manuel
N1 - Publisher Copyright:
© 2018 by the authors.
PY - 2018/8/25
Y1 - 2018/8/25
N2 - This paper presents a finite-time thermodynamic optimization based on three different optimization criteria: Maximum Power Output (MP), Maximum Efficient Power (MEP), and Maximum Power Density (MPD), for a simplified Curzon-Ahlborn engine that was first proposed by Agrawal. The results obtained for the MP are compared with those obtained using MEP and MPD criteria. The results show that when a Newton heat transfer law is used, the efficiency values of the engine working in the MP regime are lower than the efficiency values (τ) obtained with the MEP and MPD regimes for all values of the parameter τ = T2/T1, where T1 and T2 are the hot and cold temperatures of the engine reservoirs (T2 < T1), respectively. However, when a Dulong-Petit heat transfer law is used, the efficiency values of the engine working at MEP are larger than those obtained with the MP and the MPD regimes for all values of τ. Notably, when 0 < τ < 0.68, the efficiency values for the MP regime are larger than those obtained with the MPD regime. Also, when 0.68 < τ < 1, the efficiency values for the aforementioned regimes are similar. Importantly, the parameter τ plays a crucial role in the engine performance, providing guidance during the design of real power plants.
AB - This paper presents a finite-time thermodynamic optimization based on three different optimization criteria: Maximum Power Output (MP), Maximum Efficient Power (MEP), and Maximum Power Density (MPD), for a simplified Curzon-Ahlborn engine that was first proposed by Agrawal. The results obtained for the MP are compared with those obtained using MEP and MPD criteria. The results show that when a Newton heat transfer law is used, the efficiency values of the engine working in the MP regime are lower than the efficiency values (τ) obtained with the MEP and MPD regimes for all values of the parameter τ = T2/T1, where T1 and T2 are the hot and cold temperatures of the engine reservoirs (T2 < T1), respectively. However, when a Dulong-Petit heat transfer law is used, the efficiency values of the engine working at MEP are larger than those obtained with the MP and the MPD regimes for all values of τ. Notably, when 0 < τ < 0.68, the efficiency values for the MP regime are larger than those obtained with the MPD regime. Also, when 0.68 < τ < 1, the efficiency values for the aforementioned regimes are similar. Importantly, the parameter τ plays a crucial role in the engine performance, providing guidance during the design of real power plants.
KW - Efficiency
KW - Finite Time Thermodynamics (FTT)
KW - Maximum Efficient Power (MEP) regime
KW - Maximum Power Density (MPD) regime
KW - Maximum Power Output (MP) regime
UR - http://www.scopus.com/inward/record.url?scp=85053712506&partnerID=8YFLogxK
U2 - 10.3390/e20090637
DO - 10.3390/e20090637
M3 - Artículo
SN - 1099-4300
VL - 20
JO - Entropy
JF - Entropy
IS - 9
M1 - 637
ER -