Low-Temperature Thermodynamic Properties of Cobalt Trisdipivaloyl Methanate

The most commonly used refrigerants are potent greenhouse gasses that can contribute to climate change. Hydro-Fluoro-Olefins are low Global Warming Potential fluids. A summary of our experimental research activity on the thermodynamic properties of two environmentally friendly Hydro-Fluoro-Olefins, namely R1234yf and R1234ze(E), is reported. In particular, the measurements were performed with an isochoric apparatus and the apparatus specifically built to reach temperatures down to about 100 K. The data elaboration confirms the validity of the choice and that R1234yf and R1234ze(E) can be adopted in many domestic applications. Moreover, considering the reduction of the flammability issues of R1234yf and R1234ze(E), the properties of binary systems containing these fluids and carbon dioxide were analyzed. The presented mixtures could be very interesting for low-temperature applications such as cascade cycles.

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Electronic and thermodynamic properties of lanthanum tetraboride on low-temperature experimental and ab-initio calculation data

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2020.158020 ◽

2020 ◽

pp. 158020

Author(s):

G. Surucu ◽

H. Ozısık ◽

E. Deligoz ◽

I.R. Shein ◽

A.V. Matovnikov ◽

...

Keyword(s):

Low Temperature ◽

Thermodynamic Properties ◽

Ab Initio ◽

Ab Initio Calculation ◽

Calculation Data

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Determination of surface tension and surface thermodynamic properties of nano-ceria by low temperature heat capacity

Fluid Phase Equilibria ◽

10.1016/j.fluid.2020.112627 ◽

2020 ◽

Vol 518 ◽

pp. 112627

Author(s):

Zixiang Cui ◽

Jiaojiao Chen ◽

Yongqiang Xue ◽

Junzhen Gan ◽

Xinghui Chen ◽

...

Keyword(s):

Surface Tension ◽

Heat Capacity ◽

Low Temperature ◽

Thermodynamic Properties ◽

Temperature Heat ◽

Low Temperature Heat Capacity ◽

Nano Ceria

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Low-temperature Heat Capacities and Thermodynamic Properties of Hydrated Sodium Cupric Arsenate [NaCuAsO4· 1.5H2O(s)]

Chemical Research in Chinese Universities ◽

10.1016/s1005-9040(07)60126-3 ◽

2007 ◽

Vol 23 (5) ◽

pp. 574-578

Author(s):

J CHEN ◽

Y DI ◽

Z TAN ◽

L SUN

Keyword(s):

Low Temperature ◽

Thermodynamic Properties ◽

Heat Capacities ◽

Temperature Heat

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Ion-Electron Interaction Contribution to the Helmholtz Free Energy for Fully Ionized Hydrogen Plasma

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.229-231.991 ◽

2012 ◽

Vol 229-231 ◽

pp. 991-994

Author(s):

Xing Rong Zheng ◽

Chun Ling Tian ◽

Na Wu ◽

Bo Wu ◽

Xiao Bing Wang

Keyword(s):

Free Energy ◽

Low Temperature ◽

Thermodynamic Properties ◽

High Pressures ◽

Helmholtz Free Energy ◽

Hydrogen Plasma ◽

Padé Approximant ◽

Electron Interaction ◽

Pade Approximant ◽

Interaction Contribution

The Padé approximation is a very important description of thermodynamic properties of fully ionized hydrogen at high pressures and temperatures. By comparing of several reported Padé approximants via calculation of the ion-electron interaction contribution to the Helmholtz free energy of the fully ionized hydrogen plasma, we find that Padé approximant proposed by Stolzman gives an unphysical odd local minimal appears at low temperature( ), and gradually fade away with the increase of temperature, implying a prominent limit of low temperature. While Chabrier et al. developed a more reasonable Padé approximant for the contribution of ion-electron interaction on the Helmholtz free energy. Analyses on isotherm curves indicate that the thermodynamic properties of the ion-electron interaction contribution to the Helmholtz free energy described by the revised Padé approximant is very stable at all temperatures and pressures without any unphysical effects at low temperatures.

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