JOURNAL BROWSE
Search
Advanced SearchSearch Tips
Numerical Study on Characteristics of Gas Leakage in an Underground Combined Cycle Power Plant
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Numerical Study on Characteristics of Gas Leakage in an Underground Combined Cycle Power Plant
Bang, Joo Won; Sung, Kun Hyuk; Ryou, Hong Sun; Lee, Seong Hyuk;
  PDF(new window)
 Abstract
The present study numerically investigated the gas leakage characteristics in a simplified underground combined cycle power plant. The effect of obstacles near a crack location on the gas concentration in the confined space was analyzed by using the lower flammable limit (LFL) of methane gas. When the jet flow was close to the vertical walls, the longitudinal leakage distance increased by about 60% (when an obstacles was present) compared to the case without any obstacle, because these obstacles prevented transverse flows. In addition, when an air filter was installed near to the trajectory of the gas flow, the longitudinal leakage distance was similar to the distance between the crack and obstacle, whereas the transverse leakage distance increased up to 8 times compared to the case without any obstacle. As the jet flow impacts on the obstacle and changes its direction, the gas flows recirculate. Therefore, it is necessary to consider the effect of the structure and facility locations on the trajectory of the jet flow to propose an accident prevention system in confined spaces.
 Keywords
Combined Cycle Power Plant;Computational Fluid Dynamics;Confined Space;Gas Leakage;Obstacle Effect;
 Language
Korean
 Cited by
 References
1.
S. Scholfield, Offshore QRA and the ALARP principle, "Reliability Engineering and System Safety", 61, 1-2, pp. 31-37, 1998. crossref(new window)

2.
E. S. Kooi, H. K. Spoelastra, and P. Haag, "QRA Method of Land-use Planning around Onshore Natural Gas Production and Processing Plants", Chemical Engineering Transactions, 31, pp. 67-72, 2013.

3.
Y. Jo and B. J. Ahn, "A Method of Quantitative Risk Assessment for Transmission Pipeline Carrying Natural Gas", Journal of Hazardous Materials, 123, 1, pp. 1-12, 2005. crossref(new window)

4.
G. Dong, L. Xue, Y. Yang, "Evaluation of Hazard Range for the Natural Gas Jet Released from a High-pressure Pipeline: a Computational Parametric Study", Journal of Loss Prevention in the Process Industries, 23, 4, pp. 522-530, 2010. crossref(new window)

5.
Y. C. Choi, J. J. Ahn, D. M. Ha, T. H Kim and H. J. Oh, "A Study on Combustion Properties for Propane, Butane and LNG", Korean Institute of Fire Science & Engineering. pp. 68-72, 2002.

6.
R. Qi, D. Ng, B. R. Cormier and M. S. Mannan, "Numerical Simulations of LNG Vapor Dispersion in Brayton Fire Training Field Tests with ANSYS CFX", Journal of Hazardous Materials, 183, 1, pp. 51-61, 2010. crossref(new window)

7.
B. Sun, R. P. Utikar, V. K. Pareek, and K. Guo, "Computational Fluid Dynamics Analysis of Liquefied Natural Gas Dispersion for Risk Assessment Strategies", Journal of Loss Prevention in the Process Industries, 26, 1, pp. 117-128, 2013. crossref(new window)

8.
I. Yet-Pole, C. M. Shu, and C. H. Chong, "Applications of 3D QRA Technique to the Fire/Explosion Simulation and Hazard Mitigation within a Naphtha-cracking Plant", Journal of Loss Prevention in the Process Industries, 22, 4, pp. 506-515, 2009. crossref(new window)

9.
J. R. Kim, S. M. Hwang and M. O. Yoon, "A Study on Damage Assessment Caused by Hydrogen Gas Leak in Tube Trailer Storage Facilities", Journal of Korean Institute of Fire Science & Engineering, 25, 6, pp. 32-38, 2011.

10.
ANSYS FLUENT 13.0 User's Guide, 2014.

11.
Y. Zhao, L. Xihong, and L. Jianho, Analysis on the Diffusion Hazards of Dynamic Leakage of Gas Pipeline, Reliability Engineering and System Safety, 92, 1, pp. 47-53, 2007. crossref(new window)

12.
M. J. Assael, and K. E. Kakosimos, "Fires, Explosion, and Toxic Gas Dispersions: Effects Calculation and Risk Analysis", CRC Press, 2010.

13.
49 CFR Part 193, Liquefied Natural Gas Facilities: Federal Safety Standards.