The thermal energy method

1978 ◽  
Vol 57 (6) ◽  
pp. 19 ◽  
Keyword(s):  
Thermal Energy ◽  
Energy Method

Advanced thermal energy method for finishing precision parts

2021 ◽  
pp. 527-575
Author(s):  
Sergiy Plankovskyy ◽  
Viktor Popov ◽  
Olga Shypul ◽  
Yevgen Tsegelnyk ◽  
Oleg Tryfonov ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Energy Method

A thermal-energy method for calculating thermoelastic damping in micromechanical resonators

2009 ◽  
Vol 322 (4-5) ◽  
pp. 870-882 ◽  
Author(s):  
Zhili Hao ◽  
Yang Xu ◽  
Shiva Krishna Durgam
Keyword(s):  
Thermal Energy ◽  
Energy Method ◽  
Thermoelastic Damping ◽  
Micromechanical Resonators

Amplification of Heat Transfer by Shock Waves for Thermal Energy Method

2021 ◽  
pp. 577-587
Author(s):  
Sergiy Plankovskyy ◽  
Olga Shypul ◽  
Yevgen Tsegelnyk ◽  
Alexander Pankratov ◽  
Tatiana Romanova
Keyword(s):  
Heat Transfer ◽  
Shock Waves ◽  
Thermal Energy ◽  
Energy Method

Basic Principles for Thermoplastic Parts Finishing With Impulse Thermal Energy Method

2022 ◽  
pp. 49-87
Author(s):  
Sergiy Plankovskyy ◽  
Olga Shypul ◽  
Yevgen Tsegelnyk ◽  
Dmytro Brega ◽  
Oleg Tryfonov ◽  
...  
Keyword(s):  
Thermal Energy ◽  
Energy Method ◽  
Fuel Mixture ◽  
Additive Technologies ◽  
Heat Fluxes ◽  
Critical Temperatures ◽  
Basic Principles ◽  
Ignition And Combustion

Impulse thermal energy method (ITEM) as modification of the thermal energy method that is successfully used for finishing is considered for application to thermoplastics. The chapter focuses to highlight the basic principles of the thermoplastics treatment by acting heat fluxes inherent to ITEM providing the time-controlled production of combustion species. The properties of thermoplastics and the requirements for their treatment have the greatest impact on processing settings. Thus, the questions of the choice of the preferred fuel mixture, the type of its ignition, and combustion have been studied. By means of numerical situating, the processes of melting and healing of pores during processing are investigated. A method of defining processing settings has been developed, taking into account the limitations on critical temperatures. The promising possibilities of ITEM in relation to the processing of thermoplastics parts obtained by additive technologies are outlined.

Effect of Axial Prestress on Thermoelastic Damping in Micromechanical Beam Resonators

2011 ◽  
Author(s):  
Wenting Gu ◽  
Peng Cheng ◽  
Julie Hao
Keyword(s):  
Thin Films ◽  
Theoretical Model ◽  
Quality Factor ◽  
Explicit Expression ◽  
Thermal Energy ◽  
Energy Method ◽  
Strain Distribution ◽  
Elastic Strain ◽  
Thermoelastic Damping ◽  
Beam Resonator

Axial prestress is built into those micromechanical beam resonators made of deposited thin films. This prestressaffects elastic strain distribution in a beam resonator and thus has the potential of changing its thermoelastic damping (TED). In this paper, a theoretical model of TED in a micromechanical beam resonator with axial prestressis developed to study the effect of axial prestress on TED in such resonators. This theoretical model is built upon a thermal-energy method and therefore TED is calculated as the generated thermal energy during one cycle of vibration. An explicit expression for the QTED, the Quality factor due to TED, is obtained from this developed model. As a result, this work suggests that, for a beam resonator with axial prestress, its QTEDincreases with tensile prestressand decreases with compressive prestress.

Greenhouses, hot water bottles, cycles and the future of New Zealand climate

2009 ◽  
pp. 61-67
Author(s):  
W.P. De Lange
Keyword(s):  
New Zealand ◽  
Thermal Energy ◽  
Infrared Radiation ◽  
Little Ice Age ◽  
Hot Water ◽  
Ice Age ◽  
The Sun ◽  
Weather Patterns ◽  
Time Periods ◽  
Almost All

The Greenhouse Effect acts to slow the escape of infrared radiation to space, and hence warms the atmosphere. The oceans derive almost all of their thermal energy from the sun, and none from infrared radiation in the atmosphere. The thermal energy stored by the oceans is transported globally and released after a range of different time periods. The release of thermal energy from the oceans modifies the behaviour of atmospheric circulation, and hence varies climate. Based on ocean behaviour, New Zealand can expect weather patterns similar to those from 1890-1922 and another Little Ice Age may develop this century.

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