CFD Simulation of Forced Recirculating Fired Heated Reboilers

Davidy, Alon

doi:10.3390/pr8020145

Cited by 8 publications

(4 citation statements)

References 16 publications

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“…where µ is viscosity, C p is heat capacity, ρ is density, k is thermal conductivity, and D i,m is the diffusion coefficient for the ith species. The equations above were described with detail in [22]. The turbulence model chosen for simulation was the k − realizable because it is widely used and, according to results of a comparison between other models such as the k − standard and the re-normalization of the group (RNG), it performed the best [17,20].…”

Section: Cfd Simulation Set Upmentioning

confidence: 99%

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

González-Durán¹,

Zamora-Antuñano

Lira-Cortes³

et al. 2020

Processes

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This paper focuses on the numerical modeling of the effect of the height of a combustion chamber on the development of a reference calorimeter whose objective is to measure the calorific value of natural gas. The impacts of temperature, velocity, and mass fraction on the exhaust gases were evaluated by varying the height of the combustion chamber. The eddy dissipation concept (EDC) approach was used to model combustion with two different chemical kinetic mechanisms: one with three steps, called the three-step mechanism defined by default in the software used, and second skeletal model, which consists of 41 steps, through the ChemKin-import file with 16 species. The main result of this study is the selection of a combustion chamber height for the reference calorimeter that produces the best performance in the combustion process, which is 70 mm, as well as the main differences in using a three-step mechanism and a skeletal model to simulate an oxy-fuel combustion reaction.

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Section: Cfd Simulation Set Upmentioning

confidence: 99%

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

González-Durán¹,

Zamora-Antuñano

Lira-Cortes³

et al. 2020

Processes

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“…The calculated temperatures, velocity, and products mole fractions are shown by using “smoke-view” postprocessor software. The transport equations of the FDS software are described in detail in [ 12 , 13 , 14 , 15 ].…”

Section: Methodsmentioning

confidence: 99%

Large Eddy Simulation and Thermodynamic Design of the Organic Rankine Cycle Based on Butane Working Fluid and the High-Boiling-Point Phenyl Naphthalene Liquid Heating System

Davidy¹

2022

Entropy

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Large Eddy Simulation (LES) and Thermodynamic study have been performed on Organic Rankine Cycle (ORC) components (boiler, evaporator, turbine, pump, and condenser). The petroleum Coke burner provided the heat flux needed for the butane evaporator. High boiling point fluid (called phenyl-naphthalene) has been applied in the ORC. The high boiling liquid is safer (steam explosion hazard may be prevented) for heating the butane stream. It has best exergy efficiency. It is non-corrosive, highly stable, and flammable. Fire Dynamics Simulator software (FDS) has been applied in order to simulate the pet-coke combustion and calculate the Heat Release Rate (HRR). The maximal temperature of the 2-Phenylnaphthalene flowing in the boiler is much less than its boiling temperature (600 K). Enthalpy, entropy and specific volume required for evaluating the heat rates and the power have been computed by employing the THERMOPTIM thermodynamic code. The proposed design ORC is safer. This is because the flammable butane is separated from the flame produced in the petroleum coke burner. The proposed ORC obeys the two fundamental laws of thermodynamics. The calculated net power is 3260 kW. It is in good agreement with net power is reported in the literature. The thermal efficiency of the ORC is 18.0%.

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“…The authors believe that such signals should be primarily mitigated at the source itself. This can be achieved through the application of modern, e.g., dual multisensors (smoke, temperature, or electromagnetic radiation) [98][99][100]. This also includes the implementation of the hazard detection process in detectors through the application of artificial neural networks [101][102][103][104].…”

Section: Overview Of Issues Associated With the Operation Of Ess Sens...mentioning

confidence: 99%

The Dynamic Change in the Reliability Function Level in a Selected Fire Alarm System during a Fire

Paś,

Klimczak,

Rosiński

et al. 2024

Sensors

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This article discusses fundamental issues associated with the functional reliability of selected fire alarm systems (FASs) in operation during building fires. FASs operate under diverse external or internal natural environmental conditions, and the operational process of FAS should take into account the impacts of physical phenomena that occur during fires. Their operation is associated with the constant provision of reliability. FAS designers should also consider the system’s reliability when developing fire control matrices, tables, algorithms, or scenarios. All functions arising from an FAS control matrix should be implemented with a permissible reliability level, RDPN(t), prior to, as well as during, a fire. This should be assigned to the controls saved in the fire alarm control unit (FCP). This article presents the process by which high temperatures generated during a fire impact the reliability of FAS functioning. It was developed considering selected critical paths for a specific scenario and the control matrix for an FAS. Such assumptions make it possible to determine the impact of various temperatures generated during a fire on the reliability of an FAS. To this end, the authors reviewed that the waveform of the R(t) function changes for a given FAS over time, Δt, and then determined the fitness paths. The critical paths are located within the fire detection and suppression activation process, using FAS or fixed extinguishing devices (FEDs), and the paths were modeled with acceptable and unacceptable technical states. The last section of this article defines a model and graph for the operational process of a selected FAS, the analysis of which enables conclusions to be drawn that can be employed in the design and implementation stages.

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CFD Simulation of Forced Recirculating Fired Heated Reboilers

Cited by 8 publications

References 16 publications

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

Numerical Simulation for the Combustion Chamber of a Reference Calorimeter

Large Eddy Simulation and Thermodynamic Design of the Organic Rankine Cycle Based on Butane Working Fluid and the High-Boiling-Point Phenyl Naphthalene Liquid Heating System

The Dynamic Change in the Reliability Function Level in a Selected Fire Alarm System during a Fire

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