A coupled chemo-thermo-hygro-mechanical model of concrete at high temperature and failure analysis

2006 ◽  
Vol 30 (7) ◽  
pp. 635-681 ◽  
Author(s):  
Xikui Li ◽  
Rongtao Li ◽  
B. A. Schrefler
Keyword(s):  
High Temperature ◽  
Failure Analysis ◽  
Mechanical Model

Hygrothermal and mechanical model of concrete at high temperature

1998 ◽  
Vol 31 (6) ◽  
pp. 378-386 ◽  
Author(s):  
Carmelo E. Majorana ◽  
Valentina Salomoni ◽  
Bernhard A. Schrefler
Keyword(s):  
High Temperature ◽  
Mechanical Model

Geo-Thermo-Mechanical Modeling of Pre-Drilled Wellbores to Extract Geothermal Energy from Subsurface to Produce Cleaner Energy for United Arab Emirates

2021 ◽  
Author(s):  
Ubedullah Ansari ◽  
Najeeb Anjum Soomro ◽  
Farhan Ali Narejo ◽  
Shafquat Ali Baloch ◽  
Faiz Ali Talpur
Keyword(s):  
High Temperature ◽  
United Arab Emirates ◽  
Mechanical Model ◽  
Geothermal Energy ◽  
Oil And Gas ◽  
Middle Eastern ◽  
Clean Energy ◽  
Thermal Recovery ◽  
Abandoned Wells ◽  
Single Well

Abstract The middle eastern countries including United Arab Emirates (UAE) have enjoyed the energy production from hydrocarbon resource for a very long period. Indeed, now various countries in this region has shifted to alternative resources of power generation with cheaper and cleaner sources. Geothermal is the top of the list among those sources. Therefore, this study presents an ultimate model converting abandoned oil and gas wells into subsurface geothermal recovery points. Fundamentally, this study offers a geo-thermo-mechanical model of abandoned wellbore which can help in developing an optimistic geothermal energy not only from subsurface thermal reserve but also from abandoned casing and pipes installed in Wellbores. In this approach the source of heat is thermally active rock formations and the metallic pipes that are present in wellbores drilled through hot dry rocks. In the model the already drilled wells are incorporated as medium of heat flow in which water in injected and brought back to surface along with thermal impact. The results of this study revealed that, at the depth of 6000 m of high temperature wellbore the temperature is above 85°C and at this temperature the metallic casings further rise the reserve temperature thus the conversion of water into steam can be processed easily. Moreover, at high depths the stability of wellbore is also issue in high temperature formation, so mechanical model suggests that injection of water and conversion into steam in already cased wellbore can sustain up to 6 MPa stress at around 100C. Thus, the geo-thermo-mechanical model of wellbore will illustrate the possibility of converting water into steam and it will also reveal the average amount of heat that can be generated from a single well. henceforth, the thermal recovery from abandoned wells of UAE is best fit solution for clean energy. The abandoned wells are used as conduit to transport heat energy from subsurface by using water as transport medium, as water at surface temperature is injected in those wellbores and let thermal energy convert that water into steam. Later the steam is returned to surface and used as fuel in turbines or generators.

Failure Analysis on Heating Surface Tube Crackof High Temperature Reheater in Station Boiler

2013 ◽  
Vol 804 ◽  
pp. 333-336
Author(s):  
Yun Jian Jiang ◽  
Xiang Feng Zheng ◽  
Rong Gang Xue ◽  
Guo Zhen Dong ◽  
Ji Feng Zhao ◽  
...  
Keyword(s):  
Residual Stress ◽  
Electron Microscope ◽  
High Temperature ◽  
Chemical Analysis ◽  
Scanning Electron Microscope ◽  
Failure Analysis ◽  
Heating Surface ◽  
Welding Residual Stress ◽  
Microscope Analysis ◽  
Scanning Electron

Through methods, such as microscope analysis, chemical analysis, metallography examination and scanning electron microscope etc, the causes resulting in high temperature reheater tube cracking of station boiler have been analyzed. The result indicates the crack is reheat crack, and structure stress, higher hardness and excessive welding residual stress are the primary inducement of tube joint crack.

scholarly journals Failure analysis of a high temperature superheater pipe

2019 ◽  
Vol 631 ◽  
pp. 022086
Author(s):  
Facai Ren ◽  
Jiansheng Su ◽  
Xiaoying Tang
Keyword(s):  
High Temperature ◽  
Failure Analysis

Failure analysis of scratch damaged shot peened simulated components at high temperature

2009 ◽  
Vol 16 (4) ◽  
pp. 1208-1220 ◽  
Author(s):  
R.A. Cláudio ◽  
A. Burgess ◽  
C.M. Branco ◽  
J. Byrne
Keyword(s):  
High Temperature ◽  
Failure Analysis
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