Performance Optimization of an Air-Standard Irreversible Dual-Atkinson Cycle Engine Based on the Ecological Coefficient of Performance Criterion

Figure 2

Variations of the ECOP and ecological function with respect to nondimensional power output for (a) various 𝜏(𝐼_Δ𝑆=1.2); (b) for various 𝐼_Δ𝑆(𝜏=7); (c) for various 𝑟_𝐴(𝐼_Δ𝑆=1.2,𝛼=17)  (𝑇₀=𝑇_𝐿=300K, 𝑋=(𝑁_𝐻1+𝑁_𝐻2)/𝑁_𝑇=0.3, and 𝜉=0.02).

(a)

(b)

(c)