Experimental Validation of Flow Uniformity Improvement by a Perforated Plate in the Heat Exchanger of SFR Steam Generator

Energies

Sunghyuk Im¹  Byoung-Jae Kim²  Van Toan Nguyen²  Myung-Ho Kim²  Sun-Rock Choi³  Yohan Jung³ 

[1] Center for Thermometry and Fluid Flow Metrology, Korea Research Institute of Standards and Science, 267 Gajeong-ro, Yuseong-gu, Daejeon 34113, Korea;School of Mechanical Engineering, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Korea;Versatile Reactor Technology Development Division, Korea Atomic Energy Research Institute, 111 Daedeock-daero, 989 beon-gil, Yuseong-gu, Daejeon 34057, Korea;

关键词: flow uniformity;    heat exchanger;    perforated plate;    sodium-cooled fast reactor;    steam generator;   

DOI  :  10.3390/en14185846

来源: DOAJ

【 摘 要 】

The steam generator in a nuclear power plant is a type of heat exchanger in which heat transfer occurs from the hot fluid in multiple channels to the cold fluid. Therefore, a uniform flow over multiple channels is necessary to improve heat exchanger efficiency. The study aims at experimentally investigating the improvement of flow uniformity by the perforated plate in the heat exchanger used for a sodium-cooled fast reactor stream generator. A 1/4-scale experimental model for one heat exchanger unit with 33 × 66 channels was manufactured. The working fluid was water. A perforated plate was systematically designed using numerical simulations to improve the flow uniformity over the 33 × 66 channels. As a result, the flow uniformity greatly improved at a slight cost of pressure drop. To validate the numerical results, planar particle image velocimetry measurements were performed on the selected planes in the inlet and outlet headers. The experimental velocity profiles near the exits of the channels were compared with numerical simulation data. The experimental profiles agreed with the numerical data well. Both the numerical simulation and the experimental results showed a slight increase in pressure drop, despite significant improvement in the flow uniformity.

【 授权许可】

Unknown