Design and Sizing of Mobile Solar Photovoltaic Power Plant to Support Rapid Charging for Electric Vehicles

Round 1

Reviewer 1 Report

In overall the content of this paper is very low and not clearly written. 

- What are the simulations really about? 

- There are 5 pages to say that the needed PV is 20 kWp. Have you checked if you can place 20 kWp on your trailor? 

- The battery size of 112 kWh is first mentioned in chap. 3.2.2. 

- the numbers are not consistent: battery 276 Ah (tab 1) or 403 Ah (fig 5)? What is the voltage?

- wording: It is stated that the battery autonomy is 2 day. From the text I gather that the battery needs 2 days to charge.

- What are the sources of all equations, figures and the climate data, CO2-emissions?

- Why is the irradiation given for a inclined plane of 3°? The PV on the trailor is more inclined. 

- Which average values are shown in fig 3 and 4? monthly/yearly? 

- Which battery system consumes 1844 kWh to get fully charged? 

- Figure 7, 8, 12, 14, 15, 17 are nod readable. Pleas delete them or make them readable.

- For what do you need fig, 5/6/7/8/1013/14-17? 

- What is your discharging profile of your eVehicle? 

- Where is the description of the prove of concept?

- From which source is the electricity from the public grid?

- the summary is missing 

Author Response

Good day, Sir / Madam,

Thanks for your valuable comments and suggestions.

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Chockalingam Aravind Vaithilingam and co-authors proposed a plug and play solar photovoltaic power plat to charge electric vehicles with simulation software. In this manuscript, the proposed modeling was introduced in terms of the irradiation condition and power output of the solar systems, followed by the performance of the battery systems at designed SOC.  Based on the algorithm provided, the SPRCS is mainly used for emergency charging of electric vehicles, and the corresponding data is presented to demonstrate the fast charge capability of the SPRCS systems. Meanwhile, the cost and carbon emission are also presented which gives a general concept of the future SPRCS systems. However, some part of the demonstration in the manuscript is vague which failed to provide a clearer picture to the audience. Therefore, the manuscript is subjected to changes before publication.

 

Specific comments:

1. In page 8 Table 2, is the energy supplied in proportional with the available solar energy? For instance, the solar energy of Feb is greater than Jan, but the energy supplied is smaller than Jan? Besides, if the effective energy at the output smaller than the available energy. The relationship among these three is confusing.

 

2. In page 9 Figure 7, the author presented the average irradiation and the solar energy. It seems that the efficiency of the solar system is not very high, given “On average irradiation between 500 W/m2 to 800 W/m2, the chosen solar panel able to produce 198 to 266 W / module”. Did the author consider the converting efficiency of the solar panel in the proposed system?

 

3. In page 11 Table 3, there is significant variance in the end of time SOC for the system battery from month to month, what is the SOC range for the battery in the operation system?

 

4. In page 11 Figure 9, the author stated that “it is visible that for charging, cut-off voltage is 58.8V and

discharging, cut-off voltage is 35.0V”. Is the voltage based on the designed 90% SOC an 90% DOD?

 

5. In page 17, there seems to be something wrong with the format of figure 15. Besides, what is the x axis in Figure 16? Figure 17 is also not recognizable.

 

6. In page 18, the author presented the cost and emission of the CO2 for the proposed solar system. Is there any advantages compared with traditional charge system?

 

Author Response

Good day, Sir / Madam,

Thanks for your valuable comments and suggestions.

Please the attachment.

Author Response File: Author Response.docx

Reviewer 3 Report

In the paper, a plug and play solar photovoltaic power plant to charge Electric vehicles is proposed. The proposed system can act as a mobile power plant and charge batteries. The system meets the concept of Solar Photovoltaic Rapid Charging Station. The detail design and concept is discussed in the paper and they are very fruitful. The derived results from discussion are suitable to the contribution to the Journal of Energy. But some unknown expressions appear in the sentences and figures, so a minor revision is needed before publish. The following minor revision requests are appearing;

 

Line 4, Introduction; What is SPCS ? Figure 1 ; What is SOC ? Page 5, Line 24; that20 >>> that 20 Figure 5; What does the authors mean by indicating by using a computer slide? This is a demonstration of computing the energy generated by a panel-base? Figure 6; It is difficult to understand the indication of the panel because of tiny characters. Page 9, Line 1; figure >> Figure Figure 7 ; Characters are too small. Figure 8 ; Characters are too small Page 13, Line 6; Figure 11, act >> Figure 11 that is act as… Figure 16+ Figure 17 ; They are not printed. Page 18, Line 10; due to >>>   Due to

Author Response

Good day Sir / Madam,

Thanks for your valuable comments and suggestions.

please see the attachments.

Author Response File: Author Response.docx