Waste Heat Recovery in the Energy-Saving Technology of Stretch Film Production

Round 1

Reviewer 1 Report

Comments and Suggestions for Authors

This work offers a promising pathway for energy-efficient polymer processing with high recyclate content. Addressing technical gaps—particularly experimental validation, economic analysis, and schematic clarity—will elevate it to a high-impact contribution.

Technical Clarity and Validation

• Recyclate Performance Gap: While the 80% recyclate claim is ambitious, no data validate film quality (e.g., tensile strength, homogeneity) or odor-neutralization efficacy. Mechanical properties versus recyclate variability must be quantified.
• Heat Recovery System Schematic: Figure 5 lacks annotations for hydraulic components. A labeled schematic is essential for reproducibility.
• Economic Viability: Absence of cost-benefit analysis (e.g., payback period for heat pumps) undermines industrial adoption arguments.

Methodological Gaps

• Control System Specificity: The "layered control system" (Section 3.2) lacks algorithmic details (e.g., PID tuning, setpoints for Ts/Tc optimization).
• Refrigerant Selection Rationale: While R1234ze(E)/R1234yf were chosen, a comparative table (e.g., COP, pressure limits vs. alternatives like R455A) would strengthen the decision process.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 2 Report

Comments and Suggestions for Authors

• 1. Please supplement the figure caption with the designations of equipment and multi-colored lines.
• In Fig. 6, the GWP of 22 refrigerants is below the red line (including R448A), and on line 237 only 21 is indicated. Please correct and indicate the correct number.
• Line 247 indicates 17 refrigerants with a T_k temperature of up to 95°C, and in Fig. 7. up to the green line including R513B there are 16 of them. Please correct and indicate the correct number.
• It is not clear in the text of the article why the refrigerants R1234yf and R1234ze(E) are taken (line 270). Since according to Fig. 6, the GWP value for R1234yf is greater than the permissible value of 150, and R1234ze(E) is not suitable for Tk. (Fig. 7)
• Line 236. Instead of “<=”, please write one sign.
• Line 366. Instead of “(in W/K)”, please write “, W/K,”.
• Please explain in the article text the ultimate aim of conducting refrigeration system modelling. What results did the authors want to obtain? Present the results of the simulations in the conclusions.
• The conclusions do not contain results the rankings of refrigerants and refrigeration system modelling. Please add.

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Reviewer 3 Report

Comments and Suggestions for Authors

Comments are attached in PDF. Please try to reduce the plagiarism count. 

Comments for author File: Comments.pdf

Author Response

Please see the attachment.

Author Response File: Author Response.docx

Round 2

Reviewer 1 Report

Comments and Suggestions for Authors

The manuscript can be accepted for publish in current form.

Reviewer 3 Report

Comments and Suggestions for Authors

Accept as is.