Modelling the power production of single and multiple extraction steam turbines

Waste-to-energy facility planning under uncertain circumstances

“…The linear dependence of isentropic efficiency on turbine (WTE plant) size was obtained by consulting the turbine manufacturer. The isentropic efficiency in ranges 75e80% and 80e85% can be expected for throughputs 100 kt/y and 300 kt/y (discussed also in Medina-Flores [23]). The relation between electricity production and heat production for heat recovery system in Fig.…”

A multi-period mathematical model for simultaneous optimization of materials and energy on the refining site scale

“…Graphical methods were also developed on the basis of pinch technology to determine the steam levels and the optimal configurations of utility systems [21,22]. Extended research in utility systems has generally focused on new turbine models [7], simultaneous utilization of single and multiple extraction steam turbines [23], and isentropic simulation for multiple extraction steam turbines [24]. Equipment reliability and availability considerations were also considered for the design and operation of utility systems [25], and these elements were also analysed for the flexibility of utility systems [26].…”

Modeling and optimization of a utility system containing multiple extractions steam turbines

“…A poor approximation will occur if the THM is applied to the turbine with many extractions even though the THM has been verified as accurate enough for simple steam turbines [14e16]. Medina-Flores and Picón-Núñez [16] proposed algorithms to predict power production for single and multiple extraction steam turbines based on THM although the turbine performance for various operating scenarios was only represented using a single weighted average efficiency. In general, very few studies exist on the accurate modeling and optimization of multiple controlled and/or uncontrolled extractions steam turbine in which one or more extraction pressures are maintained at a constant value by changing the flowing areas.…”