Quasi Steady State, Quasi Numerical Modeling of Saturated Steam-Water Spaces Using Normalized Steam and Water Properties for Efficient Computing

Philip, Jacob; Kazi, Faruk; Manglvedekar, Harivittal

doi:10.1109/isms.2014.121

Cited by 2 publications

(5 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Thus, the single-equation approach may be remodeled as a function of temperature. Approximation functions based on single-equation approaches are at least 800 per cent faster than the steam table iteration method as has been demonstrated by simulation experiments (Philip et al ., 2014a).…”

Section: Introductionmentioning

confidence: 78%

“…When a power plant operates at optimum efficiency, its equipment’s operational life and availability also improve significantly. Thermal and nuclear power plants use a range of saturated steam water space (SSWS) equipment, and mathematical models of these pieces of equipment are an important component of thermal and nuclear power plant simulators (Philip et al ., 2014a; Kumar and Kumar, 2014; Nag, 2014). With many SSWS being encountered in most thermal and nuclear power plants, it is important to devise suitable modeling techniques for modeling SSWS equipment (Jayanti et al , 2007; Kumar and Kumar, 2014; IAEA-TECDOC-1411, 2004).…”

Section: Introductionmentioning

confidence: 99%

“…When SSTs are attached to SSWS models, the properties and steam pressure at given temperatures are obtained by iteration and exact fit by linear interpolation. The iteration–interpolation of SST methods is inefficient (Garland and Hoskins, 2014; Philip et al ., 2014a).…”

Section: Introductionmentioning

confidence: 99%

“…A separate equation was proposed for a specified temperature range, and there were five to six temperature ranges for each property. Polynomial-based approximation functions were proposed by Philip et al . (2014a).…”

Section: Introductionmentioning

confidence: 99%

“…These functions were not as accurate as the functions proposed by Garland and Hoskins (2014), but the functions are simple and can be adapted for different ranges. In general, approximation functions are efficient and computation-friendly and they enable the creation of modular models for cloud computing (Garland and Hoskins, 2014; Philip et al ., 2014a).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Mathematical modeling of unbounded spaces using single-equation-based point saturated steam water spaces

Philip¹,

Mangalvedekar²,

Kazi³

2017

WJE

Self Cite

View full text Add to dashboard Cite

Purpose Industries, especially power plants, using steam as power fluid employ many equipment and systems using saturated steam. Mathematical modeling of this saturated steam water space (SSWS) equipment is important for simulators catering to these industries and power plants. Single-equation-based modeling approach and its optimized version, mass factor–volume factor approach, are very efficient in modeling SSWS with bounded volumes, where the volume of the space is fixed. In unbounded volumes, the volume may be changing or is unbounded because of expansion, contraction or pressure control. The purpose of this paper is to propose a single equation based modeling approach for unbounded SSWS. Such unbounded volumes are encountered in coolant channels of pressurized heavy water reactor (PHWR)-type nuclear power plants (NPPs). Design/methodology/approach This paper proposes an extension of a single-equation approach by considering a subsection of the volume as miniature Point SSWS. In the proposed Point SSWS, the total heat, mass and volume of the SSWS are delinked and overall density and heat density are introduced in place. With this extension, Point SSWS can be applied to unbounded volumes. Findings In this study, 392 coolant channels of proposed 680 MWe PHWR have been simulated to ascertain the overall coolant density when coolant boils partially on nuclear heating. The simulation results have been compared with simulation results available from previous researchers and it has been found that the values are in line with previous researchers with maximum deviation of 1.2 per cent. Originality/value From the simulation results and their low value of deviation, it is clear that point space approach can be effectively used in modeling Point SSWS. Moreover, theoretically, it has been proved that the density of homogenous steam–water mixture is dependent only on the bulk heat density and temperature of the mixture.

show abstract

Section: Introductionmentioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%