Effect of Ta 5+ doping on the thermal physical properties of defective fluorite Y 3 NbO 7 ceramics

2021 ◽  
Author(s):  
Dowon Song ◽  
Janghyeok Pyeon ◽  
Myeungwoo Ryu ◽  
Hak‐Beom Jeon ◽  
Yoon‐Suk Oh ◽  
...  
Keyword(s):  
Physical Properties ◽  
Thermal Physical Properties

scholarly journals Investigation on dispersion stability and thermal-physical properties of hybrid graphene and MEPCM suspensions

2019 ◽  
Vol 158 ◽  
pp. 6725-6729 ◽  
Author(s):  
Yi’ang Li ◽  
Lisi Jia ◽  
Ying Chen ◽  
Jun Li ◽  
Songping Mo ◽  
...  
Keyword(s):  
Physical Properties ◽  
Dispersion Stability ◽  
Thermal Physical Properties

scholarly journals Comments on Thermal Physical Properties Testing Methods of Phase Change Materials

2013 ◽  
Vol 5 ◽  
pp. 695762 ◽  
Author(s):  
Jingchao Xie ◽  
Yue Li ◽  
Weilun Wang ◽  
Song Pan ◽  
Na Cui ◽  
...  
Keyword(s):  
Physical Properties ◽  
Phase Change ◽  
Phase Change Materials ◽  
Testing Methods ◽  
Thermal Physical Properties

scholarly journals Thermal-physical properties of nanoparticle-seeded nitrate molten salts

2018 ◽  
Vol 120 ◽  
pp. 275-288 ◽  
Author(s):  
Afrah Awad ◽  
Helena Navarro ◽  
Yulong Ding ◽  
Dongsheng Wen
Keyword(s):  
Physical Properties ◽  
Molten Salts ◽  
Thermal Physical Properties

Effects of cryogenic treatment on the thermal physical properties of Cu76.12Al23.88 alloy

Rare Metals ◽  
2011 ◽  
Vol 30 (6) ◽  
pp. 644-649 ◽  
Author(s):  
Ping Wang ◽  
Wei Lu ◽  
Yuehui Wang ◽  
Jianhua Liu ◽  
Ruijun Zhang
Keyword(s):  
Physical Properties ◽  
Cryogenic Treatment ◽  
Thermal Physical Properties

Primary Study on Carbon Dioxide Power Cycle of HTGR

2008 ◽  
Author(s):  
Chengjie Duan ◽  
Xiaoyong Yang ◽  
Jie Wang ◽  
Suyuan Yu
Keyword(s):  
Carbon Dioxide ◽  
High Temperature ◽  
Physical Properties ◽  
Critical Pressure ◽  
Working Fluid ◽  
Brayton Cycle ◽  
Power Cycle ◽  
Pressure Cycle ◽  
Cycle Efficiency ◽  
Thermal Physical Properties

At present, power cycles used in HTGR are indirect steam Rankine cycle and helium Brayton cycle. Using water or helium as working fluid which transform thermal energy into mechanical energy for HTGR power cycle has many disadvantages. Steam cycle could choose steam system which is similar to conventional coal-fired power plant, but because of the limit of material and equipments, there is big temperature difference between the steam and the helium, that makes big loss of thermal power and lowers the cycle efficiency. Helium can reach a high temperature in HTGR Brayton cycle and it has good stability, but because of helium has big isentropic exponent and low density, it is difficult to compress and makes helium turbine has shorter blades and more stages than normal gas turbine. Carbon dioxide has good thermal stability and physical properties. To avoid the reaction of CO2 with graphite and canning of fuel element at high temperature, it should be used in an indirect cycle as second loop working fluid. CO2 has appropriate critical pressure and temperature (7.38MPa, 304.19K) and can choose three types of cycle: supercritical cycle, subcritical-pressure cycle and trans-critical-pressure cycle (CO2 sometimes works under supercritical pressure, some times under subcritical-pressure). Carbon dioxide cycle works in a high pressure, so it makes pressure loss lower. When CO2 works close to its critical point, its density become larger than other conditions, and not change very much, this permits to reduce compress work. The thermal physical properties of carbon dioxide are totally different from helium due to CO2 works as real gas in the cycle. That causes the calculation of CO2 thermal physical properties, heat transfer and power cycle efficiency become difficult and need to be iterated. A systematic comparison between helium and carbon dioxide as working fluid for HTGR has been carried out. An empirical equation had been selected to estimate the thermal physical properties of carbon dioxide. Three types of carbon dioxide power cycle have been analyzed and the thermal efficiency has been calculated. A detailed introduction to the basic calculation process of the CO2 cycle thermal efficiency had been presented in the paper.

scholarly journals Effects of solarisation on soil thermal-physical properties under different soil treatments: A review

Geoderma ◽  
2020 ◽  
Vol 363 ◽  
pp. 114137 ◽  
Author(s):  
Ahmed Abed Gatea Al-Shammary ◽  
Abbas Kouzani ◽  
Yeboah Gyasi-Agyei ◽  
Will Gates ◽  
Jesús Rodrigo-Comino
Keyword(s):  
Physical Properties ◽  
Thermal Physical Properties
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