Energy, Exergy, Exergoeconomic Analysis, and Optimization in a Natural Gas Decompression Station with a Vortex Tube and Geothermal Preheating
, VÃctor M. Ambriz-DÃaz 2,*, Carlos Rubio-Maya 1, Oscar Chávez 2 and Israel Y. Rosas 2Round 1
Reviewer 1 Report
Comments and Suggestions for AuthorsREVIEW
At present, research is being actively carried out to assess the performance of gas stations and the costs of their operation. One of the serious technological complications of natural gas transportation is the formation of gas hydrates. Traditional methods, such as gas heating or the supply of a hydrate inhibitor (methanol), are commonly used to prevent hydrate formation, resulting in significant operating costs. In addition, gas heating requires the consumption of significant amounts of energy resources. In recent years, a new method of thermodynamic analysis has been widely used – the exergetic method. In contrast to the previously used methods of thermodynamic analysis, the exergetic method takes into account not only the quantity, but also the quality of exergic flows, which puts this method in the first place in terms of its objectivity.
The article addresses a current and relevant topic. Remarks:
1. One of the goals set in the article is the parametric optimization of the decompression station to reduce costs. At the same time, the article does not formulate the problem in the classical form of an optimization problem in the form of a objective function and a system of constraints.
2. In the article, the assumptions in 3.1.1. for the perfect decompression system. At the same time, it is almost impossible to provide the ideal parameters presented in 3.1.1 for a real system. In this regard, it seems expedient to assess the deviations of these parameters for the real system and the degree of their influence on the studied processes of natural gas decompression.
3. The article simulates various processes occurring in a natural gas decompression station, as well as conducts a computational experiment and obtains simulation results. At the same time, the article does not contain information about the design of the experiment: the strategy (plan) of the experiment, about the parameters, variable factors, modes of conduct, etc. A detailed example is presented in the paper: Olga Afanaseva, Oleg Bezyukov, Dmitry Pervukhin , Dmitry Tukeev. Experimental Study Results Processing Method for the Marine Diesel Engines Vibration Activity Caused by the Cylinder-Piston Group Operations. Inventions 2023, 8(3), 71; https://doi.org/10.3390/inventions8030071
4. The text of the article contains references to the regulatory document [37] of 2010. It is desirable for the authors of the article to note the compliance of the requirements of the 2010 document with modern requirements.
5. There are errors in the design of the article that require additional comments. For example, Fig.2 – there is no designation of the axes of the chart, the table on the store 529 – the name of the table is missing, etc.
Comments for author File: 
Comments.pdf
Author Response
Dear reviewer, the response to your comments and suggestions can be found in the attached document.
Author Response File: Author Response.pdf
Reviewer 2 Report
Comments and Suggestions for AuthorsDear authors!
This paper represents an interesting work.
I consider the work presented well-structured and I propose only a minor review, hoping that the suggestions I propose can improve the quality of the document.
The symbols used in the Equations should be explained and the unit should be given (Equations (1) - (39)).
How did you get equation (7)?
Table 4 does not correctly define the exergy destruction.
Figure 17 needs to be corrected.
Good luck!
Author Response
Dear reviewer, the response to your comments and suggestions can be found in the attached document.
Author Response File: Author Response.pdf
Reviewer 3 Report
Comments and Suggestions for AuthorsThe paper carried out explicit solution by studying mathematical models and analyzed a large number of sensitivity parameters. The overall paper has clear logic and rich content, and meets the journal inclusion requirements.
1 There are a large number of formula derivation in the article. Except for important formulas, the specific derivation process should be placed in the appendix at the end of the article.
2 In the legend of Figure 7, what do B1-B9 represent? Is it a code name?
3 Figure 10-11 uses a bar chart, which is inconsistent with other bar chart styles.
4. There is too much text in the conclusion. Can the main research results be listed in sections?
Comments on the Quality of English LanguageThe paper carried out explicit solution by studying mathematical models and analyzed a large number of sensitivity parameters. The overall paper has clear logic and rich content, and meets the journal inclusion requirements.
1 There are a large number of formula derivation in the article. Except for important formulas, the specific derivation process should be placed in the appendix at the end of the article.
2 In the legend of Figure 7, what do B1-B9 represent? Is it a code name?
3 Figure 10-11 uses a bar chart, which is inconsistent with other bar chart styles.
4. There is too much text in the conclusion. Can the main research results be listed in sections?
Author Response
Dear reviewer, the response to your comments and suggestions can be found in the attached document.
Author Response File: Author Response.pdf
