Experimental Study on Performance Enhancement of Evacuated Tube by Constant Heat Flux Mode

2018 ◽  
Vol 54 (1) ◽  
pp. 40-49 ◽  
Author(s):  
Ganga Raju Challa ◽  
M. Natarajan ◽  
Arjun Palayakkodan
Keyword(s):  
Experimental Study ◽  
Heat Flux ◽  
Performance Enhancement ◽  
Constant Heat Flux ◽  
Constant Heat ◽  
Evacuated Tube ◽  
Flux Mode

Experimental Study of the Influence of Surface Coke Deposition on Heat Transfer of Aviation Kerosene RP-3 at Supercritical Pressure

2012 ◽  
Author(s):  
Z. X. Jia ◽  
G. Q. Xu ◽  
J. Wen ◽  
H. W. Deng
Keyword(s):  
Heat Transfer ◽  
Experimental Study ◽  
Heat Flux ◽  
Flow Resistance ◽  
Constant Heat Flux ◽  
Supercritical Pressure ◽  
Coke Deposition ◽  
Transfer Enhancement ◽  
Constant Heat ◽  
Effect Of Surface

Experiments are performed to study the effect of surface coke deposition on heat transfer of aviation hydrocarbon RP-3 under supercritical pressure. The flowing RP-3 kerosene is stressed to 5MPa, and heated up to 130°C to 450°C in a stainless tube (1.8mm I.D., 2.2mm O.D., 1Cr18Ni9Ti) with a constant heat flux, and the mass flow rate is 3g/s. The working fluids flowed downwards through an 1800mm long tube. The experimental results indicated that insoluble products deposited onto metal surface have a significant impact on flow resistance and heat transfer the effect of coke deposition on heat transfer coefficient can be divided into four regimes: a) onset heat transfer enhancement zone; b) transition zone; c) heat transfer impairment zone; d) heat transfer stabilizing zone.

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