**Failure Analysis of a High-Pressure Natural Gas Heat Exchanger and its Modified Design Exchanger and its Modified Design**

**Failure Analysis of a High-Pressure Natural Gas Heat** 

DOI: 10.5772/intechopen.71202

Lei-Yong Jiang, Yinghua Han, Michele Capurro and Mike Benner Michele Capurro and Mike Benner Additional information is available at the end of the chapter

Additional information is available at the end of the chapter

http://dx.doi.org/10.5772/intechopen.71202

Lei-Yong Jiang, Yinghua Han,

### **Abstract**

[43] Weber LJ, Schumate ED, Mawer N. Experiments on flow at a 90 open-channel junction.

[44] Birman A, Falcovitz J. Application of the GRP scheme to open channel flow equations.

[45] Wang, T. and Chu, V., Manning friction in steep open-channel flow. Seventh International

[46] Vasilchenko A, Voronin A, Svetlov A, Antonyan N. Assessment of the impact of riverbeds depth in the northern part of the Volga-Akhtuba floodplain on the dynamics of its

[47] Voronin AA, Vasilchеnko AA, Pisarеv AV, Khrapov SS, Radchеnko YE. Designing mechanisms of the hydrological regime management of the volga-akhtuba floodplain based on geoinformation and hydrodynamic modeling. Science Journal of VolSU. Mathematics.

[48] Voronin A, Vasilchenko A, Pisareva M, Pisarev A, Khoperskov A, Khrapov S, Podschipkova J. Designing a system for ecological–economical management of the Volga–Akhtuba floodplain on basis of hydrodynamic and geoinformational simulation. Upravlenie bol'simi

[49] Agafonnikova EO, Khoperskov AV, Khrapov SS. The problem of forecasting and control the hydrological regime in the mountainous area in the period flash floods on the basis of hydrodynamical numerical experiments. Kibernetika i programmirovanie. 2016;3:35-53

flooding. International Journal of Pure and Applied Mathematics;110(1):183-192

Conference on Computational Fluid Dynamics, ICCFD7–3303 (2012), 14 p

ASCE Journal of Hydraulic Engineering. 2001;127(5):340-350

Journal of Computational Physics. 2007;222:131-154

Physics. 2016;1:24-37

254 Numerical Simulations in Engineering and Science

sistemami. 2015;55:79-102

The beauty of numerical simulations is its ability to reveal the physics or nature of practical engineering problems in detail, and then, to identify adequate solutions. In this chapter, an excellent example is demonstrated. The rupture of a heavy-duty, high-pressure natural gas heat exchanger is numerically investigated, and the importance of gravity effect is identified, which is often considered as a trivial factor. For the original design, the natural convection in the flow field of the heat exchanger is comparable with the forced convection at the designed operating conditions. These two convections are perpendicular and compete with each other, the flow field is highly unsteady, and hightemperature natural gas is trapped in the upper portion of the vessel, which causes the damage of the exchanger. By vertically mounting the exchanger assembly and locating the outlet pipe on top of the exchanger, the flow parameters become rather uniform at each vertical cross section and the wall temperature of the heat exchanger remains more or less the same as the heated natural gas. The proposed design has been successfully used up to now.

**Keywords:** forced convection, natural convection, heat transfer, heat exchanger, turbulent diffusion
