Transient interface temperature on a vertical surface in multi-component solid–liquid systems with volume heating. Application to various severe accident situations

Seiler, J.M.; Combeau, Hervé

doi:10.1016/j.nucengdes.2014.07.008

Cited by 9 publications

(3 citation statements)

References 17 publications

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“…A general theoretical approach has been proposed in order to determine interface temperature between solid and liquid phases under steady state situations as well as for transients. 11 Steady state corresponds here to situations with established (i.e., constant versus time) heat and mass transfer. This is typically the case in entrained flow reactors where a stable operation corresponds to established temperature fields in the gas and in the solid wall, and to a constant heat loss through the wall (that should be reduced to an acceptable value).…”

Section: Theoretical Background: Thermal Aspectsmentioning

confidence: 99%

“…Systems based on ceramic linings and/or cold crucible technique have been developed and experimentally tested under various conditions. A general theoretical approach has been proposed in order to determine interface temperature between solid and liquid phases under steady state situations as well as for transients . Steady state corresponds here to situations with established (i.e., constant versus time) heat and mass transfer.…”

Section: Theoretical Background: Thermal Aspects and Interface Temper...mentioning

confidence: 99%

“…The composition of the slag may also change, which induces a variation of solid layer thickness. During these phases, the transient interface temperature may be approached by the following expression: where ρ density (kg m –3 ); k M mass transfer coefficient (m s –1 ) in the slag layer (see later the k M determination); V interface displacement velocity (m s –1 )…”

Section: Theoretical Background: Thermal Aspects and Interface Temper...mentioning

confidence: 99%

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Determining Cooling Screen Slagging Reactor Operating Temperature

et al. 2015

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In the context of using ligno cellulosic or waste feedstock for energetic applications, it is essential to produce a clean syngas able to be used in further catalytic conversion. Entrained flow gasification is a very promising reactor technology. A slagging entrained flow reactor gives the possibility to minimize difficulties encountered with ash agglomeration, corrosion, and fouling. The operation of such cooling screen walls is empirical and not well understood theoretically. This paper details a physical approach that proposes a relation between the ash composition and the optimal operation gas temperature in the reactor, based on thermodynamic calculations of the ash liquidus temperature. This approach allows the elaboration of a deterministic methodology that enables determination of either the optimum reactor operation temperature as a function of the actual ash composition or the composition and amount of additives that can be mixed with the resource in order to reach a predetermined operation temperature and slag viscosity for a given ash composition. This technique, validated at the laboratory scale, allows therefore adapting the operation parameters of an entrained flow reactor to diverse resources in order to control simultaneously the thickness of the solidified ash layer, the slag viscosity, and the heat losses.

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Section: Theoretical Background: Thermal Aspectsmentioning

confidence: 99%

Section: Theoretical Background: Thermal Aspects and Interface Temper...mentioning

confidence: 99%

Section: Theoretical Background: Thermal Aspects and Interface Temper...mentioning

confidence: 99%

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