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Graphical output from the algebraic model (Equations 1–6; arbitrary units: a0 = 3, a1 = 2.5, Lo = 1, LD = 0.75, Fo = 1). A: change of enthalpy (ΔH, Eq 5), active heat (Q, Eq 6) and work (W, Eq 2) as functions of relative load (F/Fo). B: Gibbs efficiency (εGibbs = W/ΔH) as a function of relative load for the same arbitrary parameters used in A; εSuga is the corresponding ‘isoefficiency’ value arising from the Suga formulation.
