scholarly journals Energy Flux Distribution and Thermal Performance of Linear Fresnel Collector System in Cold Region

2017 ◽  
Vol 09 (10) ◽  
pp. 555-567
Author(s):  
Jing Ma ◽  
Zheng Chang ◽  
Rui Tian
Keyword(s):  
Energy Flux ◽  
Thermal Performance ◽  
Flux Distribution ◽  
Cold Region ◽  
Collector System

Investigation of High-Intensity Beam Characteristics on Welding Cavity Shape and Temperature Distribution

1990 ◽  
Vol 112 (1) ◽  
pp. 163-169 ◽  
Author(s):  
P. S. Wei ◽  
T. H. Wu ◽  
Y. T. Chow
Keyword(s):  
Temperature Distribution ◽  
Thermal Property ◽  
Energy Flux ◽  
High Intensity ◽  
Flux Distribution ◽  
Welding Process ◽  
Local Heat Transfer ◽  
Distribution Parameter ◽  
Beam Power ◽  
Cavity Shape

A model for investigating the characteristics of a high-intensity beam on welding cavity shape and temperature distribution is developed. The beam power density is assumed to have a Gaussian distribution. The local heat transfer rate to the liquid-vapor interface depends on this distribution and on the interface contour. This contour as determined by an iterative procedure involves simultaneously satisfying the heat conduction rate into the liquid and equilibrium of the normal forces. Computed shapes of the cavity and the free surface temperature distributions agree well with experimental data. The beam energy flux distribution parameter is found to have the strongest effect on the welding process. The predicted dimensionless curve of the beam power-penetration depth parameter versus the welding velocity-thermal property parameter is also in accord with experimental results. The use of the energy flux distribution parameter instead of the fusion zone width at the workpiece surface for the welding velocity-thermal property parameter is recommended.

Characteristics of Energy Flux Distribution of Concentrating Solar Power Systems

2018 ◽  
Vol 55 (12) ◽  
pp. 120004
Author(s):  
张娜 Zhang Na ◽  
王成龙 Wang Chenglong ◽  
梁飞 Liang Fei ◽  
朱国栋 Zhu Guodong ◽  
赵雷 Zhao Lei
Keyword(s):  
Power Systems ◽  
Energy Flux ◽  
Flux Distribution ◽  
Solar Power ◽  
Concentrating Solar Power

Study on Improving Thermal Performance of External Wall of Rural Residence in Cold Region

2013 ◽  
Vol 438-439 ◽  
pp. 686-689
Author(s):  
Zhi Feng Zheng ◽  
Mei Jun Lu
Keyword(s):  
Energy Efficiency ◽  
Energy Consumption ◽  
Energy Saving ◽  
Thermal Performance ◽  
Rural Residence ◽  
Cold Region ◽  
External Wall ◽  
Building Model ◽  
Resource Condition ◽  
Theoretical Foundations

In order to improve thermal performance of external wall of rural residence in cold region, combining with construction situation, this paper selects the typical building model to analyze the corresponding construction and energy consumption. According to the climate features and resource condition of the region, some suitable constructions of external wall in rural residence are put forward and the energy efficiency effect is analyzed. It is hoped to provide some valuably theoretical foundations for energy saving studies on rural residence in cold region.

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