scholarly journals Lightweight Equipment for the Fast Installation of Asphalt Roofing Based on Infrared Heaters

Energies ◽  
2019 ◽  
Vol 12 (22) ◽  
pp. 4253 ◽  
Author(s):  
Efrén Díez-Jiménez ◽  
Alberto Vidal-Sánchez ◽  
Alberto Barragán-García ◽  
Miguel Fernández-Muñoz ◽  
Ricardo Mallol-Poyato
Keyword(s):  
Heat Transfer ◽  
Automated Systems ◽  
Thermal Test ◽  
Operation Test ◽  
Fuel Burner

A prototype for mechanizing the asphalt roofing process was developed. In this manuscript, we present the design, manufacturing, preliminary thermal test, and operation test of the equipment. The innovation is sustained by the use of infrared radiators instead of fuel burners. Infrared heaters provide optimal clean heat transfer to asphalt rolls in comparison to fuel burner automated systems since the latter generates a significant amount of CO2, SO2, and other non-ecofriendly emissions close to workers. Moreover, the equipment has several advantages with respect to manual installation, such as roofing capacity, cleanness, safety, uniformity, and environment-friendliness. It demonstrates an installation speed of 1 m/min, on average, for 3 kg/m2 rolls, which leads to around 400–420 m2 per person a day, more than the usual manual roofing rate. However, there are some issues that need to be resolved, such as inaccurate unrolling and/or bad adhesion gaps.

scholarly journals Thermal Analysis of Air-Core Power Reactors

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Zhao Yuan ◽  
Jun-jia He ◽  
Yuan Pan ◽  
Xiao-gen Yin ◽  
Can Ding ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Heat Transfer Process ◽  
Coupled Analysis ◽  
Test Results ◽  
Thermal Test ◽  
Air Core ◽  
Structural Details ◽  
Simulation Results ◽  
Heat Conduction Process

A fluid-thermal coupled analysis based on FEM is conducted. The inner structure of the coils is built with consideration of both the structural details and the simplicity; thus, the detailed heat conduction process is coupled with the computational fluid dynamics in the thermal computation of air-core reactors. According to the simulation results, 2D temperature distribution results are given and proved by the thermal test results of a prototype. Then the temperature results are used to calculate the heat flux to predict the detailed heat transfer process in the packages of the reactors. The study in this paper may be useful in the design optimization in air-core reactors.

Calculation of the Combined Heat Transfer Coefficient of Hot-face on Cast Iron Cooling Stave Based on Thermal Test

2017 ◽  
Vol 36 (3) ◽  
pp. 249-256
Author(s):  
Feng-guang Li ◽  
Jian-liang Zhang ◽  
Hai-bin Zuo ◽  
Xuan Qin ◽  
Cheng-lin Qi
Keyword(s):  
Heat Transfer ◽  
Experimental Data ◽  
Heat Transfer Coefficient ◽  
Cast Iron ◽  
Transfer Coefficient ◽  
Thermal Test ◽  
Heat Transfer Theory ◽  
Cooling Effects ◽  
Simulation Results ◽  
Combined Heat Transfer

AbstractCooling effects of the cast iron cooling stave were tested with a specially designed experimental furnace under the conditions of different temperatures of 800 °C, 900 °C, 1,000 °C and 1,100 °C as well as different cooling water velocities of 0.5 m·s–1, 1.0 m·s–1, 1.5 m·s–1 and 2.0 m·s–1. Furthermore, the combined heat transfer coefficient of hot-face on cast iron cooling stave (αh−i) was calculated by heat transfer theory based on the thermal test. The calculated αh−i was then applied in temperature field simulation of cooling stave and the simulation results were compared with the experimental data. The calculation of αh−i indicates that αh−i increases rapidly as the furnace temperature increases while it increases a little as the water velocity increases. The comparison of the simulation results with the experimental data shows that the simulation results fit well with the experiment data under different furnace temperatures.

scholarly journals Design, Flow Field and Heat Transfer Characterization of the Conjugate Aero-Thermal Test Facility at NETL

2021 ◽  
Author(s):  
Sridharan Ramesh ◽  
Edward Robey ◽  
Seth Lawson ◽  
Douglas Straub ◽  
James Black
Keyword(s):  
Heat Transfer ◽  
Flow Field ◽  
Design Flow ◽  
Test Facility ◽  
Thermal Test

scholarly journals Lightweight Equipment Using Multiple Torches for Fast Speed Asphalt Roofing

Energies ◽  
2020 ◽  
Vol 13 (9) ◽  
pp. 2216
Author(s):  
Alberto Barragán-García ◽  
Miguel Fernández-Muñoz ◽  
Efrén Díez-Jiménez
Keyword(s):  
Heat Transfer ◽  
Thermal Design ◽  
Heat Distribution ◽  
Cfd Simulations ◽  
Fast Speed ◽  
Thermal Test ◽  
Operational Test ◽  
Gas Consumption ◽  
Computer Fluid Dynamics ◽  
Heat Transfer Calculation

In this work, we describe the design and test of a new piece of equipment, developed in order to enhance speed, gas consumption and safety during the manual asphalt roofing process. The novelty of the equipment is based on the use of a set of five parallel gas burners located in front of the roll to maximize heat transfer. The equipment is light and can be used by any worker on any type of roof. It also includes a thermal insulation cover to significantly reduce gas consumption and, thus, to reduce CO2, SO2, and other non-eco-friendly emissions. In this paper, we present the mechanical and thermal design and analysis of the equipment, Computer Fluid Dynamics (CFD) simulations for heat transfer calculation, a description of the manufacturing and assembly, a preliminary thermal test, and an operational test. The results demonstrate an installation speed of 1.75 m2/min, for 3 kg/m2 rolls, which translates to around 700–735 m2 per person per day, more than twice the usual manual roofing rate. Nevertheless, some issues need to be resolved, such as the nonuniform heat distribution and the low heat transfer at the end of the roll installation.

Comparison between two automated systems to determine specific IgE: CAP and ELItest

1996 ◽  
Vol 26 (12) ◽  
pp. 1420-1427 ◽  
Author(s):  
T. BRUNNEE ◽  
A. SEEBERGER ◽  
J. KLEINE-TEBBE ◽  
G. KUNKEL
Keyword(s):  
Specific Ige ◽  
Automated Systems
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