Eventual regularity of the semigroup associated with the mono-tubular heat exchanger equation with output feedback

2006 ◽  
Vol 55 (10) ◽  
pp. 859-862 ◽  
Author(s):  
Xin Yu ◽  
Kangsheng Liu
Keyword(s):  
Heat Exchanger ◽  
Output Feedback ◽  
Tubular Heat Exchanger ◽  
Eventual Regularity

Heating a Granular Bed by a Tubular Heat Exchanger

2018 ◽  
Vol 91 (6) ◽  
pp. 1486-1495
Author(s):  
E. A. Pitsukha ◽  
Yu. S. Teplitskii ◽  
A. R. Roslik ◽  
É. K. Buchilko
Keyword(s):  
Heat Exchanger ◽  
Granular Bed ◽  
Tubular Heat Exchanger

Coiled smooth-tubular heat exchanger with improved heat properties

1997 ◽  
Vol 33 (4) ◽  
pp. 377-380 ◽  
Author(s):  
O. K. Krasnikova ◽  
L. P. Komarova ◽  
T. S. Mishchenko
Keyword(s):  
Heat Exchanger ◽  
Tubular Heat Exchanger

scholarly journals Thermal performance in a tubular heat exchanger with deltawinglets

2018 ◽  
Vol 192 ◽  
pp. 02062
Author(s):  
Pattarapan Tongyote ◽  
Pongjet Promvonge ◽  
Nattawoot Depaiwa ◽  
Withada Jedsadaratanachai
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Thermal Performance ◽  
Thermal Characteristics ◽  
Test Tube ◽  
Turbulent Regime ◽  
Airflow Rate ◽  
Tubular Heat Exchanger ◽  
Experimental Heat ◽  
Constant Wall Heat Flux

The paper presents an experimental heat transfer enhancement study in a tubular heat exchanger fitted with delta-winglets. The experimental work was conducted by varying the airflow rate in the test tube having a constant wall heat-flux for turbulent regime, Reynolds number (Re) from 5200 to 23,000. Effects of three pitch ratios (PR=P/D=1.5, 2.0 and 3.0) and two attack angles, α = 45° and 60°, of the winglets at a single blockage ratio (BR=b/D = 0.15) on thermal characteristics are examined. The experimental results show that the winglet-inserted tube yields, respectively, the heat transfer, friction factor and thermal performance in the form of TEF around 1.99–4.08, 4.9–14.3 times higher than the plain tube and 0.85–1.85, depending on the operating condition.

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