Dynamic modelling of the helium-cooled DEMO fusion power plant with an auxiliary boiler in Apros

Szogradi, Marton; Norrman, Sixten; Bubelis, E.

doi:10.1016/j.fusengdes.2020.111970

Cited by 15 publications

(5 citation statements)

References 4 publications

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“…The dynamics of thermal generation plants are complex and may be modelled in dynamic process simulators by integrating several dynamic components [36][37][38]. However, these plants are often modelled as simple heat or temperature sources interacting with the thermal-hydraulic network [17,28,39,40].…”

Section: Modelling Of Thermal Energy Sources and Demandmentioning

confidence: 99%

“…The heating system under study (see Section 4 for further details) was implemented and simulated in Apros, a dynamic process simulator based on the ‘simantics constraint language’ developed by VTT and Fortum. Apros is commonly used for simulation of power plants and thermal‐hydraulic systems [27–29, 33, 36]. The thermal‐hydraulic library provides predefined one‐dimensional models of the components discussed in Section 2.…”

Section: System Implementationmentioning

confidence: 99%

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Dynamic simulation and control of the heat supply system of a civic building with thermal energy storage units

Cruz-Loredo

Ugalde‐Loo

Abeysekera

2022

IET Generation Trans & Dist

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The integration of low‐carbon energy solutions into heating and cooling systems is a growing topic of interest towards the decarbonisation of the energy sector. The complexity of interactions between thermal‐hydraulic components in these systems requires moving from a steady‐state analysis to a dynamic approach. Commercial dynamic process simulators provide a good platform to model and simulate the physics phenomena of these components. However, co‐simulation between software engines is often necessary to incorporate process control systems and regulate key system variables. This paper presents the co‐simulation of a real heating application from a civil building for health services integrating thermal energy storage (TES) units. A detailed dynamic model of the heating system under study is developed in Apros, a commercial dynamic process simulator. The process control system responsible for regulating the hydraulic pumps, valves, and heat sources is implemented in MATLAB/Simulink. The TES system is operated by the process control system based on a daily schedule, achieving a reduced utilisation of the heat generation units during peak‐demand hours.

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Section: Modelling Of Thermal Energy Sources and Demandmentioning

confidence: 99%

Section: System Implementationmentioning

confidence: 99%

Dynamic simulation and control of the heat supply system of a civic building with thermal energy storage units

Cruz-Loredo

Ugalde‐Loo

Abeysekera

2022

IET Generation Trans & Dist

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“…Starkloff et al [12] established the model of a large coal-fired power plant with minimal boundary conditions, with maximum relative errors of less than 5% regarding the mass flow rate, temperature, and pressure. Marton et al [13] found that, although, in certain aspects, the Apros model showed acceptable behavior, on the other hand, considering turbine pressures and feedwater temperatures, the AUXB (Auxiliary boiler) power was not sufficient to maintain the desirable conditions during dwell, as postulated by Ebsilon Heat Balance. Al-Maliki et al [14] made several improvements in the referenced parabolic trough power plant (PTPP) model (Andasol II) by Apros software.…”

Section: Introductionmentioning

confidence: 99%

Pressure Transient Analysis on the Condenser of the HPR1000 Nuclear Power Unit

Lu,

Yang,

Zhang

2024

Energies

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The transient characteristics of pressure in the condenser under fault conditions have a crucial impact on the safe operation of the entire nuclear power plant. In order to ascertain whether the condenser pressure of a HPR1000 nuclear power unit meets the requirements of the steam generator, this paper establishes a mathematical model of the condenser, along with the connected steam turbine bypass steam system and circulating water system, based on Apros. The accuracy of the simulation model is verified by comparing the coasting curve of the circulating water pump with the flow change curve under the pump-tripping condition in Apros. Under the initial CCR condition and the half-side operating condition of the condenser, simulation analyses were conducted for two transient sequences involving the loss of normal external power and the simultaneous tripping of two circulating water pumps. The corresponding changes of pressure in the condenser under the transient sequence were obtained. The study reveals that, under different initial conditions and transient sequences, the condenser pressure of the unit can meet the requirements of a 12 s steam discharge to the condenser before the internal pressure of the condenser reaches the “unavailable” set value when the turbine bypass system is under the fault condition. The research findings of this paper can provide reference data for the design, commissioning, and operation of subsequent HPR1000 nuclear power plants.

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“…The direct coupling branch has two further variants, one operating an auxiliary boiler (AUXB) and another adopting a small energy storage system (ESS). A former variant represented a benchmark case, with the purpose to verify the feasibility of the pulsed operation regime of the DEMO plant using a gas-fired boiler during dwell periods [4]. AUXB studies confirmed that the envisaged operation scheme can be implemented, although results underlined the necessity to develop further, e.g., SG and feedwater inventory management.…”

Section: Introductionmentioning

confidence: 99%

Model Development and Transient Analysis of the WCLL BB BOP DEMO Configuration Using the Apros System Code

Szogradi

Norrman

2021

Energies

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Extensive modelling and analytical work has been carried out considering the water-cooled lithium–lead breeding blanket (WCLL BB) balance of plant (BOP) configuration of the demonstration power plant (DEMO) using the Apros system code, developed by VTT Technical Research Centre of Finland Ltd. and Fortum. Contributing to the BOP work package of the EUROfusion Consortium, the integral plant model for dynamic analyses of the WCLL BB configuration has been updated with special attention to primary system components. Following trends of relevant neutronics modelling, a new BB model has been implemented in 2020 with the aim to obtain higher resolution output data and a more realistic thermalhydraulic feedback from the primary system. Once-through steam generator user components have been built based on CAD models conceived by BOP partners. Transient analyses have been performed providing a better picture regarding the behaviour of main components, e.g., the BB and the OTSGs, whilst highlighting possible ways to optimise the control scheme of the plant.

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Dynamic modelling of the helium-cooled DEMO fusion power plant with an auxiliary boiler in Apros

Cited by 15 publications

References 4 publications

Dynamic simulation and control of the heat supply system of a civic building with thermal energy storage units

Dynamic simulation and control of the heat supply system of a civic building with thermal energy storage units

Pressure Transient Analysis on the Condenser of the HPR1000 Nuclear Power Unit

Model Development and Transient Analysis of the WCLL BB BOP DEMO Configuration Using the Apros System Code

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