Development and Operation Modes of Hydrogen Fuel Cell Generation System for Remote Consumers’ Power Supply
, Andrey Kurkin 3,*, Andrey Dar’enkov 4, Andrey Kozelkov 3, Valery Vanyaev 4, Andrey Shahov 4, Andrey Shalukho 1,2, Rustam Bedretdinov 1,2, Ivan Lipuzhin 1,2 and Evgeny Kryukov 1,2
Round 1
Reviewer 1 Report
Sustainability
Manuscript ID - 1301278
Development and Operation Modes Research of Hydrogen Fuel Cell Generation System for Remote Consumers Power Supply
The authors report an evaluation of a controlling system of the autonomous power supply based on hydrogen fuel cells and batteries.
In general, the presented results are interesting and may have practical applications. However, experiments are not adequately explained making this article difficult to understand.
This article needs some structure correction – with a proper and clear explanation of experiments.
General comments:
English – the text needs some minor correction of grammar mistakes - so some proofreading is recommended.
The introduction part related to fuel cells and batteries is trivial. This is on the level of a student’s report or copy from an academic book. For somebody with basic knowledge on fuel cells or batteries, all these parts could be removed or reduced – this is just basic knowledge. In my opinion, the introduction should concentrate more on remote systems, on control systems for a combined generation, etc. A comparison of the proposed method with existing solutions is missing.
The relation of the proposed solution to remote systems is not addressed in enough detail. Why did the authors select to calculate remote system with 1kW fuel cell? What is the potential application for this size of the system? This is not explained.
In section 3. Materials and Methods – some summary of the selected system should be provided.
Once Authors mentioned that they selected 3.2V batteries.
“Therefore, to create HFCGS storage system, the cylindrical 191 cells LiFePO4 3.2V PLB IFR26650-35A, 3500 mAh were selected.”
Later that 36V
“To create a HFCGS battery storage system, a series assembly of 12 LiFePO4 batteries 36V 3.5Ah (configuration 12S1P) with BMS boards is used. “
In Table 3 is mentioned Nominal voltage, 460.8 V max 518.4 V
In fig 5 3.2V per cell
So what actually was calculated?
In some parts, it is not clear if the presented results are from modelling, experimental or from literature. Try to clarify this.
for example:
Table 7 and associated text
Is this data from literature?
I suggest correcting “domestic” to Russia and “foreign” - to average global – or something similar.
Sometimes it is not clear where the presented results are from – is the Fuel cell discharge characteristic a simulation? Own results? Or from literature?
Author Response
Please see the attachment.
Author Response File: 
Author Response.pdf
Reviewer 2 Report
The article is interesting and in general well-developed. Still, some issues must be solved before possible publication.
Some English errors were detected, an English review will be performed.
Usage of (.) and (,) must be revised along with the manuscript, indistinct use of both signals is used for numbers (fractions).
Most of the chemical/ electrochemical formulae are not well-written, particularly of subindices and equal instead of the arrows.
MSFC is incorrect, it is MCFC.
Table 2: The unit of the current is in front of numbers, the rest of the items have unis in front of the variable mane (column one). The usage of C instead of A for current is a bit odd.
The text above Figure 2 does not fit Figure 2 and the description of Figure 2: cost or energy intensity?
Line 200: 10C, C is not a unit of current density.
Improve the quality of figures.
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Reviewer 3 Report
The paper entitled“Development and Operation Modes Research of Hydrogen Fuel Cell Generation System for Remote Consumers Power Supply” needs substantial changes for acceptance
1-The need of "Research" in the title is not necessary
2-Hydrogen is an energy carrier, not an energy source. Kindly refer
https://www.mdpi.com/1996-1073/13/22/5879/htm
3-The statement "Fuel cells (FC) are considered to be the most efficient hydrogen energy sources." is redundant and needs to be restructured
4-The authors can provide more insight on the fuel cell fundamentals as well the electrochemical reaction involved. Kindly refer
Jayakumar, A., 2018. An assessment on polymer electrolyte membrane fuel cell stack components. In Applied Physical Chemistry with Multidisciplinary Approaches (pp. 23-49). Apple Academic Press.
Jayakumar, A., 2019. A comprehensive assessment on the durability of gas diffusion electrode materials in PEM fuel cell stack. Frontiers in Energy, 13(2), pp.325-338.
5-Avoid using the term as heat pollution.
6-Avoid using format "paper [7]" Strictly adhere to journal format
7-The statement "fuel cells with a polymer proton exchange membrane"
must be "Fuel cells with a polymer or proton exchange membrane"
8-In table 1 reaction use the proper reaction symbol "=" is not an appropriate form
9-The contribution of the paper is not well established
10-Check for typo,
A comprehensive proof reading is mandatory as there is numerous grammatical errors
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
Round 2
Reviewer 1 Report
Most of my comments were adequately addressed and corrections were introduced.
The introduction section is now better and represents the content.
I have no further comments.
I suggest accepting this paper.
Author Response
We very much appreciate the overall positive attitude of the referee to our manuscript and thank him for particularly useful comments.
Reviewer 2 Report
The current version of Development and Operation Modes of Hydrogen Fuel Cell 3 Generation System for Remote Consumers’ Power Supply is greatly improved as compared to previous version. Still some English details remains, nothing that cannot be solved during the read proof and edition by the journal.
Author Response
We very much appreciate the overall positive attitude of the referee to our manuscript and thank him for particularly useful comments. The comments and suggestions of the referee are presented in italics.
The current version of Development and Operation Modes of Hydrogen Fuel Cell 3 Generation System for Remote Consumers’ Power Supply is greatly improved as compared to previous version. Still some English details remains, nothing that cannot be solved during the read proof and edition by the journal.
Proofreading is done. Some typos and grammatical errors are corrected
Reviewer 3 Report
The paper still needs few changes to be accepted. Kindly consider
1-The authors state the electrical efficiency of fuel cells is up to 70%, but it should be around 60%
2-More references on hydrogen as fuel/energy carrier can be given, kindly refer to the MDPI paper
https://www.mdpi.com/1996-1073/13/22/5879/htm
3-kindly rewrite this sentence "Meanwhile, fuel cells have such disadvantages as low chemical reactions rate, soft discharge characteristic and the inadmissibility of sudden load surges"
what do u mean my soft discharge characteristic?
4-The statement "The load voltage is 12 V and the load power is about 10 W. The fuel cell is used only when necessary"
these statements need more clarity
5-the authors state
"AFC as well as PEMFC refer to low-temperature fuel cells (operating temperature is 20-250°C).
also the authors state
"PEMFCs operate within 60-120°C temperature range and are classified as low-temperature fuel cells"
why there is a mismatch
make a comprehensive proofreading, there are a lot of grammatical errors
Author Response
Please see the attachment.
Author Response File: Author Response.pdf
