scholarly journals TESTS OF FLAT HYDROTURBINE ROTATING A HEAT EXCHANGE TUBE

2020 ◽  
Vol 2020 (1) ◽  
pp. 11-12
Author(s):  
Aleksey Bal'chugov ◽  
Borislav Kustov ◽  
Natal'ya Kustova
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Rotational Speed ◽  
Hydraulic Turbine ◽  
Vertical Tube ◽  
Heat Transfer Tube ◽  
Laboratory Bench ◽  
Transfer Tube ◽  
Heat Exchange Tube

Tests of a flat-blade hydraulic turbine designed to rotate a heat transfer tube at a laboratory bench have been performed. The dependence of the rotational speed of a hydraulic turbine in a vertical tube on the flow of water is determined.

Study on Turbulent Buffeting Characteristics of Liquid Lead Bismuth

2014 ◽  
Author(s):  
Yun-Bo Li ◽  
Tao Zhou ◽  
Qi-Jun Huo ◽  
Bai-Xu Chen
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Exchange ◽  
Fatigue Damage ◽  
Liquid Lead ◽  
Transfer Tube ◽  
Heat Exchange Tube ◽  
Vertical Heat ◽  
Cross Number ◽  
Center Distance

In Pb Bi loop, the turbulent buffeting phenomenon of lead bismuth fluid in heat exchanger, may cause fatigue damage of heat transfer tube. Through the establishment of Pb-Bi loop heat exchanger model, invent a program for calculation, we can get the turbulent buffeting characteristics. The results show that: As the increases of heat exchange tube cross number, the buffeting coefficients pipeline is greater, the probability of occurrence of turbulent buffeting phenomenon is more low; The greater lead bismuth flow velocity is, the more prone to turbulent buffeting phenomenon. With vertical heat tube center distance increases, the buffeting coefficients decreased first and then increased, when the buffeting coefficients reached the minimum value, the turbulent buffeting phenomenon is most intense; As the horizontal heat pipe center distance is bigger, turbulent buffeting phenomenon is becoming less clear.

Mechanisms of Heat Transfer Enhancement of Gas–Solid Fluidized Bed: Estimation of Direct Contact Heat Exchange From Heat Transfer Surface to Fluidized Particles Using an Optical Visualization Technique

1995 ◽  
Vol 117 (1) ◽  
pp. 104-112 ◽  
Author(s):  
Y. Kurosaki ◽  
I. Satoh ◽  
T. Ishize
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Fluidized Bed ◽  
Flow Rate ◽  
Direct Contact ◽  
Heat Transfer Surface ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Contact Frequency ◽  
Fluidized Particles

This paper deals with mechanisms of heat transfer in a gas–solid fluidized bed. Heat transfer due to heat exchange by direct contact from a heat transfer tube immersed in the bed to fluidized particles was studied by means of visualization of contact of the fluidized particles to the heat transfer surface. The results show that the duration of contact of fluidized particles was almost uniform over the tube circumference and was hardly affected by the flow rate of fluidizing gas. On the other hand, the contact frequency between the particles and heat transfer tube was evidently influenced by the gas flow rate and particles diameter, as well as the location on the tube circumference. Using the visualized results, the amount of heat conducted to fluidized particles during the contact was estimated. This result showed that unsteady heat conduction to the fluidized particles plays an important role in the heat transfer, especially at the condition of incipient fluidization.

Effect of Surface Heat Exchange Intensifier Geometry on Heat Transfer Tube Strength

2019 ◽  
Vol 62 (3) ◽  
pp. 373-380
Author(s):  
I. A. Popov ◽  
A. V. Shchelchkov ◽  
R. A. Aksyanov ◽  
A. N. Skrypnik ◽  
S. A. Isaev
Keyword(s):  
Heat Transfer ◽  
Heat Exchange ◽  
Surface Heat ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Surface Heat Exchange ◽  
Effect Of Surface

scholarly journals Numerical Analysis on Rib-Tubes of Seawater Open Rack Vaporizer With the Spoiler Lever

2017 ◽  
Vol 24 (s2) ◽  
pp. 14-21
Author(s):  
Su Houde ◽  
Yu Shurong ◽  
Fan Jianling ◽  
Wei Xing
Keyword(s):  
Heat Transfer ◽  
Tube Wall ◽  
Small Difference ◽  
Operating Temperature ◽  
Operating Parameter ◽  
Tube Model ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Gasification Efficiency ◽  
Gas Ratio

Abstract In order to explore a more reasonable structure and operating parameter, guide the design and improve the gasification of seawater Open Rack Vaporizer (ORV), Research on the rules of seawater that flows and heat transfer in the ORV tube was studied in this paper. By simplifying the model, heat transfer tube model with spoiler lever was obtained and simulated, the distribution of temperature field, gas ratio, velocity field and press field in rib tube were analyzed, and different inlet velocity of LNG, roughness of the tube wall both effected on the overall gasification, the results shows that the actual gasification efficiency from heat transfer tube is higher than normal, small difference of gas ratio outlet, velocity and temperature are both lower, LNG could be easer gasified at operating temperature between -162°C~+3°C than that between -162°C~+0°C.

Gas hydrate fast nucleation from melting ice and quiescent growth along vertical heat transfer tube

2005 ◽  
Vol 48 (1) ◽  
pp. 75-82 ◽  
Author(s):  
Yingming Xie ◽  
Kaihua Guo ◽  
Deqing Liang ◽  
Shuanshi Fan ◽  
Jianming Gu ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Gas Hydrate ◽  
Heat Transfer Tube ◽  
Transfer Tube ◽  
Vertical Heat

scholarly journals Research and Development of Heat Transfer Tube Materials for a Multi-stage Flash Desalination Plant

1976 ◽  
Vol 25 (5) ◽  
pp. 349-362
Author(s):  
Yukio Sakae ◽  
Yukiyasu Watanabe ◽  
Toshio Sasaki ◽  
Hideo Togano
Keyword(s):  
Heat Transfer ◽  
Research And Development ◽  
Heat Transfer Tube ◽  
Desalination Plant ◽  
Multi Stage ◽  
Transfer Tube
Sign in / Sign up

Export Citation Format

Share Document