Experimental Study on Natural Circulation, Evaporative Cooling System for LSI Chips : Effect of the Location of LSI chip on the Heat Transfer Performance

2003 ◽  
Vol 2003 (0) ◽  
pp. 449-450
Author(s):  
Nobuo TAKATA ◽  
Hiroshi HONDA ◽  
Zheng guo Wang
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Transfer Performance ◽  
Cooling System ◽  
Natural Circulation ◽  
Evaporative Cooling ◽  
Transfer Performance ◽  
Evaporative Cooling System

Development of Inherently Safe Technologies for Large Scale BWRs: (3) Infinite-Time Air-Cooling System

2014 ◽  
Author(s):  
Akinori Tamura ◽  
Toshinori Kawamura ◽  
Naoyuki Ishida ◽  
Kazuaki Kitou
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Performance ◽  
Cooling System ◽  
Natural Circulation ◽  
Air Cooling ◽  
Transfer Performance ◽  
Infinite Time ◽  
Air Cooling System ◽  
Heat Quantity

To address long-term station black outs, which occurred at the Fukushima Nuclear Power Station, we have been developing the infinite-time air-cooling system which operates without electricity by a natural circulation loop. The air-cooling heat exchanger, which is located outside the primary containment vessel of a reactor, transfers the decay heat to the atmosphere by natural circulation resulting from the density difference of the air. Improvement in the heat-transfer performance of air-cooling is a key technology in the development of the infinite-time air-cooling system. In this paper, we developed the air-cooling enhancing technology for the infinite-time air-cooling system by using a micro-fabrication surface, turbulence-enhancing structures, and heat-transfer fins. To evaluate the performance of this air-cooling enhancing technology, we conducted a heat exchange test using an element test apparatus. A single tube of the air-cooling heat exchanger, which includes a sheath heater and thermo-couples, was used. The air flow outside the tube and the heat quantity were respectively controlled using an air-compressor and the sheath heater. The heat-transfer performance was calculated from the heat-quantity and temperature difference measured using thermo-couples. The developed air-cooling enhancing technology demonstrated superior heat-transfer performance in this test. The heat-transfer performance increased approximately 100 % with this technology compared with a bare pipe. From these experimental results, we confirmed good feasibility for implementing the infinite-time air-cooling system.

scholarly journals Experimental study on evaluation index of indirect evaporative cooling heat transfer performance

2019 ◽  
Vol 158 ◽  
pp. 5789-5794 ◽  
Author(s):  
Chunmei Guo ◽  
Tong Chen ◽  
Bin Zheng ◽  
Qinghhua Liu ◽  
Jian Lv
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Transfer Performance ◽  
Evaporative Cooling ◽  
Evaluation Index ◽  
Transfer Performance ◽  
Indirect Evaporative Cooling
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