The study of the temperature field in pebble beds with volumetric heating and radial flow of coolant

International Scientific and Practical Conference: Water Power Energy Forum 2018

Smorchkova, Yu.V.^1 ; Varava, A.N.^1 ; Dedov, A.V.^1 ; Zakharenkov, A.V.^1 ; Komov, A.T.^1

National Research University, Moscow Power Engineering Institute, Krasnokazarmennaya str., 14, Moscow

111250, Russia^1

关键词: Aisi 420 steels;    Cooling liquid;    Experimental and numerical studies;    High frequency HF;    High frequency induction heating;    Internal heat;    Mass flow rate;    Volumetric heating;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/288/1/012119/pdf
DOI  :  10.1088/1755-1315/288/1/012119

来源: IOP

【 摘 要 】

The paper presents the results of an experimental and numerical study of hydrodynamics and heat transfer in a pebble bed with internal volumetric heat release. An experimental setup was designed to investigate the hydrodynamics and heat transfer at the radial flow of a single-phase coolant. The pebble bed was set from 2.0 mm diameter sphere made of AISI 420 steel. The internal heat release model in the pebble bed is provided by high-frequency induction heating, whereby the thermal power of the high-frequency installation is 20 kW. The experiments were carried out in the range of mass flow rates of 0.1 - 0.6 kg/s. The test section simulates the fuel assembly of a nuclear reactor with microfuel. Pebbles are placed between the inner and outer perforated covers. Radial coolant flow is achieved to minimize pressure losses. The inner cover is cone-shaped and is the dispensing manifold for the coolant. The conical shape of the cover provides a uniform flow rate of the cooling liquid along the length of the test section. The temperature distribution in the pebbles were recorded.