Thermodynamic Efficiency and Bounds of Pumped Thermal Electricity Storage Under Whole Process Ecological Optimization

2021 ◽  
Author(s):  
Yanchao Zhang ◽  
Zhenzhen Xie
Keyword(s):  
Thermodynamic Efficiency ◽  
Electricity Storage ◽  
Whole Process ◽  
Ecological Optimization

Comment on “Thermodynamic Efficiency of Pumped Heat Electricity Storage”

2016 ◽  
Vol 116 (15) ◽  
Author(s):  
Jincan Chen ◽  
Juncheng Guo
Keyword(s):  
Thermodynamic Efficiency ◽  
Electricity Storage

Thermodynamic Efficiency of Pumped Heat Electricity Storage

2013 ◽  
Vol 111 (11) ◽  
Author(s):  
André Thess
Keyword(s):  
Thermodynamic Efficiency ◽  
Electricity Storage

Thermodynamic efficiency of mesoscopic thermoelectric generators with broken time-reversal symmetry: Insights from an ecological optimization

2020 ◽  
Vol 34 (15) ◽  
pp. 2050262
Author(s):  
Wei Liu ◽  
Long Bai ◽  
Yuehua Wang
Keyword(s):  
Time Reversal ◽  
Performance Optimization ◽  
Figure Of Merit ◽  
Thermodynamic Efficiency ◽  
Time Reversal Symmetry ◽  
Thermoelectric Generators ◽  
Thermoelectric Figure ◽  
Thermodynamic Performance ◽  
Number Formula ◽  
Ecological Optimization

We study the performance optimization for mesoscopic thermoelectric generators (MTGs) with broken time-reversal symmetry by using an ecological criterion, and some specific properties of the thermoelectric system are further revealed. We discuss the working regimes of time-reversal symmetric mesoscopic (macroscopic) thermoelectric generators, and find that a larger thermodynamic efficiency can be obtained only when the Wiedemann–Franz (WF) law is strongly violated. Furthermore, a definite dependence of the optimal bound efficiency (power) on the asymmetry parameter and the generalized thermoelectric figure of merit is analytically determined, and it is found that the usual value [Formula: see text] can be readily overcome. A larger efficiency can be obtained with the further enhancement of broken time-reversal symmetry, although the power output does not synchronize with efficiency. Interestingly, both the increase of the number [Formula: see text] of terminals and the external magnetic field open up the possibility to physically enhance the performance of thermoelectric generators, and the underlying physical origin of the improved energy conversion is also provided. The obtained results can contribute to a profound insight of thermodynamic performance for MTGs.

THE PROBLEMS OF ECOLOGICAL OPTIMIZATION OF AGRICULTURAL LAND USE IN LUHANSK REGION

2019 ◽  
pp. 145-150
Author(s):  
Kyselova O.O. ◽  
Kyselov Yu.O. ◽  
Sopov D.S. ◽  
Sopova N.V.
Keyword(s):  
Land Use ◽  
Agricultural Land ◽  
Agricultural Land Use ◽  
Ecological Optimization

Development and Application of Quality Control System for Highway Subgrade Construction

2019 ◽  
Vol 2 (5) ◽  
Author(s):  
Tong Wang
Keyword(s):  
Quality Control ◽  
Real Time ◽  
Detection Method ◽  
System Development ◽  
Effective Control ◽  
Construction Process ◽  
Development Mode ◽  
The Road ◽  
Whole Process

The compaction quality of the subgrade is directly related to the service life of the road. Effective control of the subgrade construction process is the key to ensuring the compaction quality of the subgrade. Therefore, real-time, comprehensive, rapid and accurate prediction of construction compaction quality through informatization detection method is an important guarantee for speeding up construction progress and ensuring subgrade compaction quality. Based on the function of the system, this paper puts forward the principle of system development and the development mode used in system development, and displays the development system in real-time to achieve the whole process control of subgrade construction quality.

A Problem of Long - Term Digital Preservation: Difference in Humanities and Natural Sciences

2014 ◽  
Vol 3 ◽  
pp. 183-195
Author(s):  
Elena Macevičiūtė
Keyword(s):  
Social Sciences ◽  
Digital Preservation ◽  
Dynamic Activity ◽  
Private Companies ◽  
Time Line ◽  
Digital Documents ◽  
Whole Process ◽  
The Difference ◽  
Technological Science

The article deals with the requirements and needs for long-term digital preservation in different areas of scholarly work. The concept of long-term digital preservation is introduced by comparing it to digitization and archiving concepts and defined with the emphasis on dynamic activity within a certain time line. The structure of digital preservation is presented with regard to the elements of the activity as understood in Activity Theory. The life-cycle of digitization processes forms the basis of the main processing of preserved data in preservation archival system.The author draws on the differences between humanities and social sciences on one hand and natural and technological science on the other. The empirical data characterizing the needs for digital preservation within different areas of scholarship are presented and show the difference in approaches to long-term digital preservation, as well as differences in selecting the items and implementing the projects of digital preservation. Institutions and organizations can also develop different understanding of preservation requirements for digital documents and other objects.The final part of the paper is devoted to some general problems pertaining to the longterm digital preservation with the emphasis of the responsibility for the whole process of safe-guarding the cultural and scholarly heritage for the re-use of the posterior generations. It is suggested that the longevity of the libraries in comparison with much shorter life-span of private companies strengthens the claim of memory institutions to playing the central role in the long-term digital preservation.

Computational and experimental study of the thermodynamic efficiency of heat pumps

2016 ◽  
Vol 19 (1) ◽  
pp. 13-20
Author(s):  
V. Tarasova ◽  
Keyword(s):  
Experimental Study ◽  
Heat Pumps ◽  
Thermodynamic Efficiency

ECOLOGICAL OPTIMIZATION OF AN IRREVERSIBLE OTTO CYCLE WITH VARIABLE SPECIFIC HEATS OF WORKING FLUID

2017 ◽  
Author(s):  
Yanlin Ge ◽  
Lingen Chen ◽  
Xiaoyong Qin ◽  
Zhihui Xie
Keyword(s):  
Working Fluid ◽  
Otto Cycle ◽  
Specific Heats ◽  
Ecological Optimization

The Path of Standard Albanian Language Formation

2018 ◽  
Vol 5 (2) ◽  
pp. 106-115
Author(s):  
Sindorela Doli Kryeziu
Keyword(s):  
Single Unit ◽  
Cultural Factors ◽  
Language History ◽  
Whole Process ◽  
History Of ◽  
Social And Cultural Factors ◽  
Cultural Body ◽  
Over Time ◽  
Language Literature

Abstract In our paper we will talk about the whole process of standardization of the Albanian language, where it has gone through a long historical route, for almost a century.When talking about standard Albanian language history and according to Albanian language literature, it is often thought that the Albanian language was standardized in the Albanian Language Orthography Congress, held in Tirana in 1972, or after the publication of the Orthographic Rules (which was a project at that time) of 1967 and the decisions of the Linguistic Conference, a conference of great importance that took place in Pristina, in 1968. All of these have influenced chronologically during a very difficult historical journey, until the standardization of the Albanian language.Considering a slightly wider and more complex view than what is often presented in Albanian language literature, we will try to describe the path (history) of the standard Albanian formation under the influence of many historical, political, social and cultural factors that are known in the history of the Albanian people. These factors have contributed to the formation of a common state, which would have, over time, a common standard language.It is fair to think that "all activity in the development of writing and the Albanian language, in the field of standardization and linguistic planning, should be seen as a single unit of Albanian culture, of course with frequent manifestations of specific polycentric organization, either because of divisions within the cultural body itself, or because of the external imposition"(Rexhep Ismajli," In Language and for Language ", Dukagjini, Peja, 1998, pp. 15-18.)

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