Sensitivity Analysis of the Complex Dynamics of an Expansion Process in Low-Pressure Compressed Air for an Electrical Energy Storage System

Round 1

Reviewer 1 Report

The paper describes the sensitivity analysis of Complex Dynamics of an Expansion Process in Low-Pressure Compressed Air for an Electrical Energy Storage System, Although the research topic is one of the main problems in the energy sector, I do not understand what is new in the work and find that the prameters are part of the main work. Also the mathematical method used is not clear, the presentation of tables and figures is not appropriate. I suggest resubmitting the manuscript after improvement.

Author Response

We have prepared responses for the review comments and we are attaching it in the bottom.

Author Response File: Author Response.docx

Reviewer 2 Report

This study presents the possibilities for the research and development of an expander used compressed air energy storage systems (CAES) by programming the equations to find the optimal working parameters of the piston engine. The MS has some issues:

-What is the Novelty?

- Where is the validation, the authors only wirted that it is validated by another paper.

- Present the flowchart of programming.

 

Comments for author File: Comments.pdf

Author Response

We have prepared responses for the review comments and we are attaching it in the bottom.

Author Response File: Author Response.docx

Reviewer 3 Report

In this paper, the use of air engines in a compressed air energy storage system (discharging) is investigated and analysed, which is very interesting. The following are some of the comments that the authors are advised to consider before this paper is accepted:

(1)    In section 2 materials and methods, the description of m_2,4,6 , m_1,3,5 and m’_2,4,6 , m’_1,3,5 are confusing: ‘mass of moist air under a piston m1,3,5, mass of moist air over a piston m2,4,6, mass flow entering or exiting under a piston ṁ2,4,6, mass flow entering or exiting over a piston ṁ1,3,5’. Please double check.

(2)    A more detailed diagram of the configuration of the CAES discharging process is needed to make people understand the modelling, instead of only a ‘Basic scheme of the concepts of the CAES system’ (figure 1).

(3)    No description for equation (6). Please add it.

(4)    In section 2 materials and methods, the values for most of the parameters used in the modelling equations are not given. For example, numerical factor ? in equation (4). It is highly suggested to add one table to give all these parameters’ initial values.

 

(5)    Please explain in the section 3 why power output and efficiency are not in a linear relationship. (figure 3,4,5)

Author Response

We have prepared responses for the review comments and we are attaching it in the bottom.

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

All the requarments have been done, Hence I recommnded to published this manuscript. 

Reviewer 2 Report

it is acceptable.