The Coolant Channel Module CCM — A Basic Element for the Construction of Thermal-Hydraulic Models and Codes

Hoeld, A.

doi:10.5772/53372

Cited by 2 publications

(3 citation statements)

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“…The here presented article is part and the continuation of a publication series of four papers being already published in two INTECH and one Applied Mathematics Open Access Books (( [12][13][14] and (( [43]). It is, according to a continuous research work, updated to the newest status in this field and concentrated in an advanced and very condensed form mainly to the theoretical background of this basic coolant channel model and to the special (and generally applicable) mathematical methods to solve this sort of resulting system of equations in a corresponding digital module.…”

Section: Remarksmentioning

confidence: 99%

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A Thermal-Hydraulic Coolant Channel Module (CCM) for Single- and Two-Phase Flow

Hoeld¹

2020

Prime Archives in Applied Mathematics

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Section: Remarksmentioning

confidence: 99%

“…) α (if setting L NOCCF = 1 at the input) (14) (with 00 C  representing the slope of C 0 at  = 0)…”

Section: Drift Flux Correlationmentioning

confidence: 99%

A Thermal-Hydraulic Coolant Channel Module (CCM) for Single- and Two-Phase Flow

Hoeld¹

2020

Prime Archives in Applied Mathematics

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“…The here presented article is part and the continuation of a publication series of three papers being already published in two INTECH Open Access Books ( [12]- [14]). It is, according to a continuous research work, updated to the newest status in this field and concentrated in an advanced and very condensed form mainly to the theoretical background of this basic coolant channel model and to the special (and generally applicable) mathematical methods to solve this sort of resulting system of equations in a corresponding digital module.…”

Section: Remarksmentioning

confidence: 99%

A Thermal-Hydraulic Coolant Channel Module (CCM) for Single- and Two-Phase Flow

Hoeld¹

2015

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A theoretical "drift-flux based thermal-hydraulic mixture-fluid coolant channel model" is presented. It is the basis to a corresponding digital "Coolant Channel Module (CCM)". For this purpose derived "Separate-Region Mixture Fluid Approach" should yield an alternative platform to the currently dominant "Separate-Phase Models" where each phase is treated separately. Contrary to it, a direct procedure could be established with the objective to simulate in an as general as possible way the steady state and transient behaviour of characteristic parameters of single-and/or (now non-separated) two-phase fluids flowing within any type of heated or non-heated coolant channels. Their validity could be confirmed by a wide range of verification and validation runs, showing very satisfactory results. The resulting universally applicable code package CCM should provide a fundamental element for the simulation of thermal-hydraulic situations over a wide range of complex systems (such as different types of heat exchangers and steam generators as being applied in both conventional but also nuclear power stations, 1D and 3D nuclear reactor cores etc). Thereby the derived set of equations for different coolant channels (distinguished by their key numbers) as appearing in these systems can be combined with other ODE-s and non-linear algebraic relations from additional parts of such an overall model. And these can then to be solved by applying an appropriate integration routine. Within the solution procedure, however, mathematical discontinuities can arise. This due to the fact that along such a coolant channel transitions from single-to two-phase flow regimes and vice versa could take place. To circumvent these difficulties it will in the presented approach be proposed that the basic coolant channel (BC) is subdivided into a number of sub-channels (SC-s), each of them being occupied exclusively by only a single or a two-phase flow regime. After an appropriate nodalization of the BC (and thus its SC-s) and after applying a "modified finite volume method" together with other special activities the fundamental set of non-linear thermal-hydraulic partial differential equations together with corresponding constitutive relations can be solved for each SC separately. As a result of such a spatial discretization for each SC type (and thus the entire BC) the wanted set of non-linear ordinary differential equations of 1st order could be established. Obviously, special attention had to be given to the A. Hoeld 2015 varying SC entrance or outlet positions, describing the movement of boiling boundaries or mixture levels along the channel. Including even the possibility of SC-s to disappear or be created anew during a transient.

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The Coolant Channel Module CCM — A Basic Element for the Construction of Thermal-Hydraulic Models and Codes

Cited by 2 publications

References 12 publications

A Thermal-Hydraulic Coolant Channel Module (CCM) for Single- and Two-Phase Flow

A Thermal-Hydraulic Coolant Channel Module (CCM) for Single- and Two-Phase Flow

A Thermal-Hydraulic Coolant Channel Module (CCM) for Single- and Two-Phase Flow

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