An effective methodology to determine the optimal operational strategy for a complex CHCP plant is presented. The model is based on the minimization of a chosen variable and it is organically developed integrating thermodynamics and economics. The graph-based optimization algorithm is developed in order to find the optimal set-points of the energy system components in a sufficiently short-time. By this way the model is applicable to real industrial problems, especially when the energy is sold to the electricity market. The problem in study is discretized in time and plant states, represented as weighted graph, and the strategy that minimizes the total cost is determined using backward dynamic programming. The proposed methodology has been applied to the optimization of the set-point of an internal combustion engine based plant used to satisfy an hospital energy load, under different seasonal load conditions (winter, summer and transitional seasons) and energy prices. Two different optimization criteria are considered, namely economical optimization and primary energy consumption minimization. It is then demonstrated that the model can be effectively applied to analyze the cost and profit in energy conversion in power plants, related to electricity price, fuel price, running of turbine and auxiliary equipment, service power consumption. In particular, the chosen test case demonstrates not only the model reliability but also the economical and thermodynamic convenience of using the model itself to optimize the plant.

Andreassi, L., Facci, A., Martini, F., Ubertini, S. (2013). Optimization of CHCP operation strategy: cost vs primary energy consumption minimization. In ASME 2013 International Mechanical Engineering Congress and Exposition [10.1115/IMECE2013-64965].

Optimization of CHCP operation strategy: cost vs primary energy consumption minimization

ANDREASSI, LUCA;
2013-01-01

Abstract

An effective methodology to determine the optimal operational strategy for a complex CHCP plant is presented. The model is based on the minimization of a chosen variable and it is organically developed integrating thermodynamics and economics. The graph-based optimization algorithm is developed in order to find the optimal set-points of the energy system components in a sufficiently short-time. By this way the model is applicable to real industrial problems, especially when the energy is sold to the electricity market. The problem in study is discretized in time and plant states, represented as weighted graph, and the strategy that minimizes the total cost is determined using backward dynamic programming. The proposed methodology has been applied to the optimization of the set-point of an internal combustion engine based plant used to satisfy an hospital energy load, under different seasonal load conditions (winter, summer and transitional seasons) and energy prices. Two different optimization criteria are considered, namely economical optimization and primary energy consumption minimization. It is then demonstrated that the model can be effectively applied to analyze the cost and profit in energy conversion in power plants, related to electricity price, fuel price, running of turbine and auxiliary equipment, service power consumption. In particular, the chosen test case demonstrates not only the model reliability but also the economical and thermodynamic convenience of using the model itself to optimize the plant.
International Mechanical & Engineering Congress & Exposition- ASME
SAN DIEGO (USA)
2013
Rilevanza internazionale
contributo
2013
Settore ING-IND/08 - MACCHINE A FLUIDO
English
Optimization , Energy consumption
Intervento a convegno
Andreassi, L., Facci, A., Martini, F., Ubertini, S. (2013). Optimization of CHCP operation strategy: cost vs primary energy consumption minimization. In ASME 2013 International Mechanical Engineering Congress and Exposition [10.1115/IMECE2013-64965].
Andreassi, L; Facci, A; Martini, F; Ubertini, S