LEDSAT 1U CubeSat thermal analysis and steady state calibration for thermal-vacuum testing

2021 ◽  
Author(s):  
Emanuele Bedetti ◽  
Niccolo Picci ◽  
Andrea Gianfermo ◽  
Lorenzo Frezza ◽  
Diego Amadio ◽  
...  
Keyword(s):  
Thermal Analysis ◽  
Steady State ◽  
Thermal Vacuum ◽  
Vacuum Testing

Thermal-vacuum testing of drilling and sampling tool

2000 ◽  
Author(s):  
M. Marchesi ◽  
R. Campaci ◽  
A. Nista ◽  
W. Prendin ◽  
S. Scarpa ◽  
...  
Keyword(s):  
Thermal Vacuum ◽  
Vacuum Testing

scholarly journals Mathematical simulation of heat transfer in spacecraft

2017 ◽  
pp. 61-78
Author(s):  
A. G. Vikulov
Keyword(s):  
Heat Transfer ◽  
Mathematical Models ◽  
Mathematical Simulation ◽  
Accuracy Evaluation ◽  
Identification Problems ◽  
Thermal Vacuum ◽  
Ground Testing ◽  
Scientific Approach ◽  
Thermal Calculations ◽  
Vacuum Testing

We implemented a systemic scientific approach to thermal vacuum development of spacecraft, which integrates the problems of thermal calculations, thermal vacuum tests and accuracy evaluation for mathematical models of heat transfer by means of solving identification problems. As a result, the following factors increase the efficiency of spacecraft ground testing: reducing the duration of thermal vacuum tests, making autonomous thermal vacuum testing of components possible, increasing the accuracy of thermal calculations

Deflectometry-based thermal vacuum testing for a pneumatic terahertz antenna

2021 ◽  
Author(s):  
Henry Quach ◽  
Marcos A. Esparza ◽  
Hyukmo Kang ◽  
Aman Chandra ◽  
Heejoo Choi ◽  
...  
Keyword(s):  
Thermal Vacuum ◽  
Terahertz Antenna ◽  
Vacuum Testing

Thermal Analysis of the Solar Collector Cum Storage System Using a Hybrid-Nanofluids

2021 ◽  
Vol 10 (4) ◽  
pp. 616-626
Author(s):  
Kawthar Dhif ◽  
F. Mebarek-Oudina ◽  
S. Chouf ◽  
H. Vaidya ◽  
Ali J. Chamkha
Keyword(s):  
Thermal Analysis ◽  
Steady State ◽  
Solar Collector ◽  
Heat Storage ◽  
Storage System ◽  
Stored Energy ◽  
Salt Mixture ◽  
Energy Field ◽  
Hybrid Nanofluids ◽  
Flat Plate Collector

The main problem in the solar energy field is the storage of thermal energy. To divert this problem, it was suggested to use a flat-plat solar collector which also serves as a storage system; this solution will reduce the size of a refrigerating machine that we are studying. A high stored energy density is only possible if we through use latent heat of phase change. Thermal analysis has been developed for this type of storage collector for near-steady state conditions using a nanofluid heat storage substance depended on KNO3–NaNO3 binary salt mixture as PCM and a mix of Al2O3–SiO2 as nanoparticle, from which the new Hottel-Whillier-Bliss equations have been used for efficient flat plate collector. Computations were achieved for a large variety of parameters to verify the significance of the created model.

Steady-state thermal analysis of multi-active zone tunnel regeneration semiconductor laser

2011 ◽  
Vol 23 (3) ◽  
pp. 817-820
Author(s):  
王智群 Wang Zhiqun ◽  
尧舜 Yao Shun ◽  
崔碧峰 Cui Bifeng ◽  
王智勇 Wang Zhiyong ◽  
沈光地 Shen Guangdi
Keyword(s):  
Thermal Analysis ◽  
Steady State ◽  
Semiconductor Laser ◽  
Active Zone

scholarly journals Mechanical Fault Detection on Electrical Machine: Thermal Analysis of Small Brushed DC Motor with Faulty Bearing

2018 ◽  
Vol 225 ◽  
pp. 05012
Author(s):  
Abbas A. Wahab ◽  
N. Fatimah Abdullah ◽  
M.A.H. Rasid
Keyword(s):  
Thermal Analysis ◽  
Steady State ◽  
Direct Current ◽  
Dc Motor ◽  
Temperature Data ◽  
Electrical Machine ◽  
Financial Loss ◽  
Data Logger ◽  
Steady State Temperature ◽  
Using Data

Direct current motors (DC motor) are used in the small electric devices commonly. DC motor are cheap and easy to install, thus their popularity. Despite the popularity, faults occur which make diagnosis and detection of faults very important. It avoids financial loss and unexpected shutdown operation causes by these faults. This paper presents an analysis of temperature profile of the much famous small Brushed DC motor with a faulty bearing. The temperature data of healthy DC motor and DC motor with faulty bearing were measured by thermocouple and recorded using data logger in real time until steady state temperature, under different load. The analysis on the steady state temperature allow to conclude that bearing fault can clearly be recognised through characteristics temperature difference with a healthy motor.

Thermal Analysis of Realistic Breast Model With Tumor and Validation by Infrared Images

2021 ◽  
pp. 208-218
Author(s):  
Deepika Singh ◽  
Ashutosh Kumar Singh ◽  
Sonia Tiwari
Keyword(s):  
Breast Cancer ◽  
Thermal Analysis ◽  
Steady State ◽  
Thermal Model ◽  
Infrared Imaging ◽  
Ductal Carcinoma ◽  
Blood Perfusion ◽  
Breast Cancer Detection ◽  
Surface Geometry ◽  
Breast Thermography

Breast thermography is an emerging adjunct tool to mammography in early breast cancer detection due to its non-invasiveness and safety. Steady-state infrared imaging proves promising in this field as it is not affected by tissue density. The main aim of the present study is to develop a computational thermal model of breast cancer using real breast surface geometry and internal tumor specification. The model depicting the thermal profile of the subject's aggressive ductal carcinoma is calibrated by variation of blood perfusion and metabolic heat generation rate. The subject's IR image is used for validation of the simulated temperature profile. The thermal breast model presented here may prove useful in monitoring the response of tumor post-chemotherapy for female subjects with similar breast cancer characteristics.

scholarly journals Digital Holographic Interferometry in the Long-Wave Infrared Range for Measuring Large Deformations of Space Components under Thermal-Vacuum Testing

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 534
Author(s):  
Jean-François Vandenrijt ◽  
Cédric Thizy ◽  
Fabian Languy ◽  
Marc Georges
Keyword(s):  
Holographic Interferometry ◽  
Space Structures ◽  
Large Temperature ◽  
Infrared Range ◽  
Thermal Vacuum ◽  
Full Field ◽  
Space Industry ◽  
Long Wave Infrared ◽  
Space Conditions ◽  
Vacuum Testing

Holographic interferometry at around 10 µm wavelengths has many advantages. It offers the possibility of large deformation measurement, while being much less sensitive to external perturbations. We present the state-of-the art of this technique applied to several industrial cases of the space industry. In particular, we demonstrate that the technique is well adapted to measurement of full-field deformation maps of space structures undergoing large temperature variations typical to what they experience in space conditions.

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