One-dimensional model for heat transfer to a supercritical water flow in a tube

Sallevelt, J.L.H.P.; Withag, J.A.M.; Bramer, Eduard A.; Brilman, Wim; Brem, Gerrit

doi:10.1016/j.supflu.2012.04.003

Cited by 14 publications

(15 citation statements)

References 17 publications

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“…A different approach using CFD has been performed by Withag et al [115,116]. Here, the authors performed CFD simulations to calculate heat transfer characteristics of supercritical water to a flow reactor for both 1D and 2D cases.…”

Section: Computational Fluid Dynamics Modelingmentioning

confidence: 99%

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Yakaboylu

Harinck

Smit³

et al. 2015

Energies

183

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Abstract:The supercritical water gasification process is an alternative to both conventional gasification as well as anaerobic digestion as it does not require drying and the process takes place at much shorter residence times; a few minutes at most. The drastic changes in the thermo-physical properties of water from the liquid state to the supercritical state make it a promising technology for the efficient conversion of wet biomass into a product gas that after upgrading can be used as substitute natural gas. The earliest research goes back as far as the 1970s and since then, supercritical water has been the subject of many research works in the field of thermochemical conversion of wet biomass. This article reviews the state of the art of the supercritical water gasification technology starting from the thermophysical properties of water and the chemistry of reactions to the process challenges of such a biomass based supercritical water gasification process plant.

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Section: Computational Fluid Dynamics Modelingmentioning

confidence: 99%

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Yakaboylu

Harinck

Smit³

et al. 2015

Energies

183

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“…In this model, the Dittus-Bolter equation [30] was applied at subcritical pressure. At supercritical pressure, we used the Swenson equation [31], which is an improved form of the Dittus-Bolter equation that accounts for a rapid change in the water-steam properties at the pseudo point of the supercritical pressure.…”

Section: Q T )mentioning

confidence: 99%

Performance Evaluation of a Novel Thermal Power Plant Process with Low-Temperature Selective Catalytic Reduction

et al. 2020

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We present the concept of a novel thermal power plant process in conjunction with low-temperature selective catalytic reduction (SCR). This process can be employed to achieve modern standards for NOx emissions and solve problems related to post-gas cleaning processes, such as thermal fatigue, catalyst damage, and an increase in differential pressure in the boiler. Therefore, this study is aimed at evaluating the performance of a novel flue-gas cleaning process for use in a thermal power plant, where a low-temperature SCR is implemented, along with the existing SCR. We developed a process model for a large-scale power plant, in which the thermal power plant was divided into a series of heat exchanger block models. The mass and energy balances were solved by considering the heat transfer interaction between the hot and cold sides to obtain the properties of each material flow. Using the process model, we performed a simulation of the new process. New optimal operating conditions were derived, and the effects that the new facilities have on the existing process were evaluated. The results show that the new process is feasible in terms of operating stability and cost, as well as showing an increase in the boiler thermal efficiency of up to 1.3%.

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“…The IAPWS-IF97 formulation consists of a set of equations from which thermo-physical properties such as specific volume, enthalpy, thermal conductivity, viscosity and heat capacity can be derived. A detailed description of the IAPWS-I97 formulation can be found in the work of Sallevelt et al [4] and the work of Wagner et al [3].…”

Section: Introductionmentioning

confidence: 99%

Heat transfer characteristics of supercritical water in a tube: Application for 2D and an experimental validation

Withag

Sallevelt

Brilman

et al. 2012

The Journal of Supercritical Fluids

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One-dimensional model for heat transfer to a supercritical water flow in a tube

Cited by 14 publications

References 17 publications

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Supercritical Water Gasification of Biomass: A Literature and Technology Overview

Performance Evaluation of a Novel Thermal Power Plant Process with Low-Temperature Selective Catalytic Reduction

Heat transfer characteristics of supercritical water in a tube: Application for 2D and an experimental validation

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