Open AccessOptimization design method of PRHRS air heat exchanger based on natural circulation characteristics
Author(s) -
Yandong Wang,
Yongdong Chen,
Xiaohong Wu,
Zhi-Qiang Yu,
Pei Cheng
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/721/1/012049
Subject(s) - natural circulation , heat exchanger , thermal hydraulics , nuclear engineering , decay heat , environmental science , computer science , simulation , mechanics , engineering , mechanical engineering , heat transfer , physics
Passive residual heat removal system (PRHRS) was the key equipment to ensure the inherent safety of the fourth generation of nuclear reactors, which can effectively reduce the probability of core meltdown in the event of an accident. A multi-physics coupling model of sodium cooled fast reactor PRHRS was established in this paper, which based on the natural circulation characteristics of PRHRS. The model was analytically calculated according to the flow balance and energy balance, and finally the model was dynamically balanced. The influence of the tube spacing of the serpentine finned tube and the opening area of the air door on the thermal behavior of the system was analyzed through PRHRS model, and the optimal design method of the air heat exchanger (AHX) of PRHRS was mastered. The research results provide a theoretical basis for the rational design of the air heat exchanger and the safe operation of the sodium cooled fast reactor PRHRS.