Gaseous emissions associated with the utility systems increasingly arouse people's attention in recent years. As a result of the severe environment situation

the design criteria for a modern utility system should not only include economic factors but also consider environmental requirements. A multi-objective mixed-integer linear programming (MOMILP) model for the operational planning of steam power system is demonstrated

which taking in account the different units and fuel selection and also the environmental concerns. The improved augmented e-constraint method is adopted to solve the multi-objective optimization problem of minimization of economic cost and minimization of environmental effect as its capability of producing the exact Pareto set. One motivation example is introduced to analyze the different environmental charge standards and corresponding optimization schemes of the same refinery. In addition

by the comparison

it's obvious to find the effectiveness of the proposed MOMILP model.