Heat exchange enhancement in evaporators with an external boiling zone and natural circulation

1993 ◽  
Vol 29 (1) ◽  
pp. 11-16
Author(s):  
S. G. Zakirov ◽  
Sh. K. Agzamov ◽  
Kh. Sh. Bakhronov
Keyword(s):  
Heat Exchange ◽  
Natural Circulation ◽  
Exchange Enhancement ◽  
Boiling Zone

Optimization of winglet vortex generators combined with riblets for wall/fluid heat exchange enhancement

2013 ◽  
Vol 50 (1) ◽  
pp. 1092-1100 ◽  
Author(s):  
Arnaud Colleoni ◽  
Adrien Toutant ◽  
Gabriel Olalde ◽  
Jean Marc Foucaut
Keyword(s):  
Heat Exchange ◽  
Vortex Generators ◽  
Exchange Enhancement

scholarly journals CFD Analysis of the Passive Decay Heat Removal System of an LBE-Cooled Fast Reactor

2018 ◽  
Vol 2018 ◽  
pp. 1-11
Author(s):  
Jiarun Mao ◽  
Lei Song ◽  
Yuhao Liu ◽  
Jiming Lin ◽  
Shanfang Huang ◽  
...  
Keyword(s):  
Heat Exchange ◽  
Fast Reactor ◽  
Natural Circulation ◽  
Heat Removal ◽  
Engineering Project ◽  
Decay Heat ◽  
The Core ◽  
Main Vessel ◽  
Heat Removal System ◽  
Removal System

This paper presents capacity of the passive decay heat removal system (DHRS) operated under the natural circulation conditions to remove decay heat inside the main vessel of the Lead-bismuth eutectic cooled Fast Reactor (LFR). The motivation of this research is to improve the inherent safety of the LFR based on the China Accelerator Driven System (ADS) engineering project. Usually the plant is damaged due to the failure of the main pumps and the main heat exchangers under the Station Blackout (SBO). To prevent this accident, we proposed the DHRS based on the diathermic oil cooling for the LFR. The behavior of the DHRS and the plant was simulated using the CFD code STAR CCM+ using LFR with DHRS. The purpose of this analysis is to evaluate the heat exchange capacity of the DHRS and is to provide the reference for structural improvement and experimental design. The results show that the stable natural circulations are established in both the main vessel and the DHRS. During the decay process, the heat exchange power is above the core decay heat power. In addition, in-core decay heat and heat storage inside the main vessel are efficiently removed. All the thermal-hydraulics parameters are within a safe range. Moreover, the highest temperature occurs at the upper surface of the core. A swirl occurs at the corner of the lateral core surface and some improvements should be considered. And the natural circulation driving force can be further increased by reducing the loop resistance or increasing the natural circulation height based on the present design scenario to enhance the heat exchange effect.

scholarly journals Heat exchange enhancement of jet impingement cooling with the novel humped-cone heat sink

2021 ◽  
Vol 28 ◽  
pp. 101445
Author(s):  
Marcin Froissart ◽  
Paweł Ziółkowski ◽  
Waldemar Dudda ◽  
Janusz Badur
Keyword(s):  
Heat Exchange ◽  
Heat Sink ◽  
Jet Impingement ◽  
The Novel ◽  
Impingement Cooling ◽  
Exchange Enhancement
Sign in / Sign up

Export Citation Format

Share Document