Hot roller embossing system equipped with a temperature margin-based controller

2014 ◽  
Vol 85 (8) ◽  
pp. 085117 ◽  
Author(s):  
Seyoung Kim ◽  
Youngsu Son ◽  
Sunghee Lee ◽  
Sangyong Ham ◽  
Byungin Kim
Keyword(s):  
Temperature Margin

Verification of Warm Prestressing Effect Under a Pressurized Thermal Shock (PTS) Event

1994 ◽  
Vol 116 (3) ◽  
pp. 267-273 ◽  
Author(s):  
H. Okamura ◽  
G. Yagawa ◽  
T. Hidaka ◽  
Y. Urabe ◽  
M. Satoh ◽  
...  
Keyword(s):  
Vessel Wall ◽  
Irradiation Embrittlement ◽  
Predictive Equations ◽  
Warm Prestressing ◽  
Pressurized Thermal Shock ◽  
Reactor Steels ◽  
Fracture Tests ◽  
Integrity Analysis ◽  
Temperature Margin ◽  
Reactor Pressure

Fracture tests for the verification of WPS (warm prestressing) effect were carried out by using large flat specimens and big compact specimens with low toughness. In the case of monotonical KI increasing during cooling, the specimen broke within the scatter band of KIC. On the other hand, when KI was decreasing during cooling, the specimens did not break even if KI values were beyond the scatter band of KIC. That is, WPS effect was confirmed even for the low toughness steel like reactor pressure vessel wall under neutron irradiation. Also, KI values at fracture can be predicted by Chell’s theory. By applying WPS effect and the predictive equations for irradiation embrittlement for Japanese PWR reactor steels to the PTS integrity analysis, much more temperature margin can be expected.

scholarly journals Analisis Pengaruh High Pressure Compressor Rotor Clearance Terhadap Exhaus Gas Temperature Margin pada CFM56-7

2021 ◽  
Vol 6 (2) ◽  
pp. 50-55
Author(s):  
Wildan Sofary Darga ◽  
Edy K. Alimin ◽  
Endah Yuniarti
Keyword(s):  
High Pressure ◽  
Engine Performance ◽  
Exhaust Gas ◽  
Gas Temperature ◽  
Compressor Rotor ◽  
High Pressure Compressor ◽  
The Difference ◽  
Gas Turbine Exhaust ◽  
Temperature Margin ◽  
Pressure Compressor

Exhaust Gas Temperatue is an parameter where the hot gases’s temperature leave the gas turbine. Exhaust gas temperature margin is the difference between highest temperature at take off phase with redline on indicator (???????????? ???????????????????????? °????=???????????? ????????????????????????????−???????????? ???????????????? ????????????). EGTM is one of any factor to determine engine performance. A good perfomance of an engine when it has a big margin (EGTM), during operation of an engine the EGTM could decrease untill 0 (zero). So many factors could affect EGTM deteroration there are: distress hardware such as airfoil erosion, leak of an airseals, and increase of clearance between tip balde and shroud. Increase of clearance happens in high pressure compressor rotor clearance. In CFM56-7 have 9 stage(s) of high pressure compressor and each stage give the EGT Loses. The calculation of EGT Effect/Losses is actual celarance – minimum clearance x 1000 x EGT Effect °C, where actual clearance define by the substraction of outside diameter’s rotor with inside diameter’s shroud, minimum clearance define in the manual, 1000 is adjustment from mils/microinch to inch, and EGT Effect is temperature that define in the manual. The analysist had done with 6 (six) engine serial number and proceed by corelation that shown linkage between clearance and EGT Effect, the corelation is strong shown the result of corelation (r) is 0.994275999 or nearest 1.

Analysis of the Effects of the Nuclear Heat Load on the ITER TF Magnets Temperature Margin

2014 ◽  
Vol 24 (3) ◽  
pp. 1-4 ◽  
Author(s):  
Laura Savoldi Richard ◽  
Roberto Bonifetto ◽  
Umberto Bottero ◽  
Arnaud Foussat ◽  
Neil Mitchell ◽  
...  
Keyword(s):  
Heat Load ◽  
Nuclear Heat ◽  
Temperature Margin

Thermal Challenges Due to Improved RF Performance

2009 ◽  
Author(s):  
Mitesh Parikh ◽  
Roberto Montan˜ez ◽  
Patrick Loney
Keyword(s):  
Output Power ◽  
Input Power ◽  
Low Noise ◽  
Positive Temperature ◽  
Rf Design ◽  
Duty Cycles ◽  
Rf Performance ◽  
The Cost ◽  
Temperature Margin

Transmit/Receive (T/R) modules are the heart of many Active Electroncially Scanned Antennas (AESA). AESA’s enable a great deal of modern radar technology used on many military platforms. In the case study presented, a radar design necessitated the modification of an existing T/R module to increase the output power by 3dB. The RF design of the module demonstrated that a 3× increase of input power would be needed to achieve the desired performance. Increasing the input power creates extra power dissipated on the chips within the module, in the form of heat, resulting in significant thermal challenges. Chip junction temperatures directly affect the performance and reliability of the T/R Module. That is why thermal management of the module became the driving engineering concern. In this project, significant redesign of the T/R module was not possible due to the cost and schedule implications for this program. Therefore multiple engineering techniques were used to adequately cool all portions of the T/R module. These included refined RF modeling of the module to determine operating duty cycles, a re-designed coldplate to better remove heat, a modification of the power supply to lower the T/R module overhead voltage, and a re-designed Power Amplifier/Low Noise Attenuator (PA/LNA) on the module. The end result was a T/R module, with only one of five chips redesigned, which met desired output power, and demonstrated a positive temperature margin on all module components. All of this was accomplished within an acceptable cost and schedule budget.

Mitigation of the Temperature Margin Reduction due to the Nuclear Radiation on the ITER TF Coils

2013 ◽  
Vol 23 (3) ◽  
pp. 4201305-4201305 ◽  
Author(s):  
L. Savoldi Richard ◽  
R. Bonifetto ◽  
A. Foussat ◽  
N. Mitchell ◽  
K. Seo ◽  
...  
Keyword(s):  
Nuclear Radiation ◽  
Temperature Margin

Operating temperature margin and heat load in PF superconducting coils of KSTAR

2002 ◽  
Vol 12 (1) ◽  
pp. 648-652 ◽  
Author(s):  
Qiuliang Wang ◽  
Cheon Seog Yoon ◽  
Jinliang He ◽  
Wooho Chung ◽  
Keeman Kim
Keyword(s):  
Heat Load ◽  
Operating Temperature ◽  
Superconducting Coils ◽  
Temperature Margin

AC Loss and Temperature Margin of Cable-in-Conduit Conductors for JT-60SA Poloidal Field Coil

2011 ◽  
Vol 21 (3) ◽  
pp. 2016-2019 ◽  
Author(s):  
K. Nakamura ◽  
K. Nishimura ◽  
T. Masuda ◽  
T. Takao ◽  
H. Murakami ◽  
...  
Keyword(s):  
Ac Loss ◽  
Poloidal Field ◽  
Field Coil ◽  
Temperature Margin

scholarly journals Quench Detection and Protection for High-Temperature Superconductor Accelerator Magnets

Instruments ◽  
2021 ◽  
Vol 5 (3) ◽  
pp. 27
Author(s):  
Maxim Marchevsky
Keyword(s):  
High Temperature ◽  
High Temperature Superconductor ◽  
Hot Spot ◽  
High Temperature Superconductors ◽  
Zone Formation ◽  
Normal Zone ◽  
Normal Zone Propagation ◽  
Accelerator Magnets ◽  
Detection Schemes ◽  
Temperature Margin

High-temperature superconductors (HTS) are being increasingly used for magnet applications. One of the known challenges of practical conductors made with high-temperature superconductor materials is a slow normal zone propagation velocity resulting from a large superconducting temperature margin in combination with a higher heat capacity compared to conventional low-temperature superconductors (LTS). As a result, traditional voltage-based quench detection schemes may be ineffective for detecting normal zone formation in superconducting accelerator magnet windings. A developing hot spot may reach high temperatures and destroy the conductor before a practically measurable resistive voltage is detected. The present paper discusses various approaches to mitigating this problem, specifically focusing on recently developed non-voltage techniques for quench detection.

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