Research on the Law of Thermal Effect of Floating Nuclear Power Plants Thermal Discharge

Abstract:

The waste heat emissions of thermal discharge from floating nuclear power plants may have a negative thermal effect on the environment. Study on the dilution and diffusion of cooling water plays an important role in thermal pollution prevention. The cooling water discharge process can be condensed into the thermal jet in cross flow. According to the theory of computational fluid dynamics, the mathematical model of round horizontal thermal jets in cross flow is established. The 3D numerical simulation of thermal jets based on finite volume method is achieved by using the Realizable k-ε turbulence model and the Semi-implicit method for pressure linked equations, and the three-dimensional trajectory of thermal jet are obtained. The rationality of analysis method is approved by comparing calculation value with experimental value. The temperature distributions in thermal jets are studied through the numerical experiments conducted under different cross-flow velocity and different emission angle. As a result, the impacts of these conditions on thermal pollution area are found, and the theoretic bases are provided for the design of the cooling water discharge pipe.

• Periodical: Applied Mechanics and Materials (Volumes 799-800)
• Pages: 734-738
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.799-800.734
• Online since: October 2015
• Authors: Tian Qi Dai*, Shi Wei Yao, Zhi Guo Wei
• Keywords: Floating Nuclear Power Plant, Thermal Discharge, Thermal Jet, Thermal Pollution

References

[1] ZHANG CK, YAO J, TAO JF. Advances in numerical simulation of thermal discharge of heat or nuclear power plants in coastal areas[J]. Advances in Science and Technology of Water Resources, 2010, 30(3).

[2] China Institute of Water Conservancy and Hydroelectric Power Research. Study on mathematics modeling of Qinshan Nuclear Power Plant cooling water discharge[R]. Beijing: China Institute of Water Conservancy and Hydroelectric Power Research, (1990).

DOI: 10.18306/dlkxjz.2021.08.010

[3] ZHU JZ. Numerical simulation of 3-D cooling water in the huge tidal bay[J]. Journal of Hydroelectric Engineering, 2007, 26(4).

[4] Ding Zhao-li. Research on thermo-hydraulic behaviors of thermal discharge at lateral out flow mixing [D]. Beijing University of Technology, (2012).

[5] Xiao Y, Zhu XL, Li KJ, Wang NR, Han KY. A measuring method of three-dimensional trajectory of a horizontal buoyant jet in cross flow [J]. Advances in Science and Technology of Water Resources, 2013, 33(3).

[6] Dai TQ, Yao SW, Wei ZG. Study of buoyant rule of cooling water discharged in cross flow[J]. Ship Science and Technology, 2015, 37(4).

[7] GB3097-199 7, Sea water quality standard[S].