The invention provides an optimization method for determining a
flue gas
excess heat organic Rankine cycle system parameter. The optimization method comprises the steps of taking into account of a cooling
water cycle to establish a
thermodynamic model; through a first law of
thermodynamics and a
second law of thermodynamics, obtaining
system net output power, water pump waste power, heat efficiency, (the formula is shown in the description) efficiency and
irreversible loss, and according to the influence of an
evaporation temperature and an
expansion ratio on
system thermodynamic performance, determining an optimal
evaporation temperature; under the optimal
evaporation temperature, calculating heat exchange areas of an
evaporator and a condenser, wherein it is defined that an economical objective function is the ratio of the system net output power to the area of the
evaporator to the area of the condenser, and the comprehensively
evaluation function is the weighted sum the economical objective function (the formula is shown in the description) and the efficiency; with the comprehensive
evaluation function being an optimization target, determining an optimal
condensation temperature; according to the optimal
evaporation temperature and the optimal
condensation temperature, determining
system parameters of work medium
mass, cooling
water mass, evaporation pressure, condensation pressure, an
expansion ratio, the net output power, the heat efficiency and the
irreversible loss. According to the optimization method for determining the
flue gas
excess heat organic Rankine cycle system parameter, the optimal
evaporation temperature and the
condensation temperature can be determined, and thus the optimal system parameter is determined.