The paper provides valuable insights into elevator system efficiency, especially in the context of worm gear reducers. However, the assumption of constant friction coefficients might oversimplify the resistance calculations. Friction coefficients can vary significantly with factors like lubrication state, temperature, and surface wear. Could the authors clarify how these variables were accounted for, if at all? Additionally, were any sensitivity analyses conducted to understand the impact of these assumptions on the final efficiency metrics?
While the experimental method is robust, incorporating dynamic friction data (e.g., friction coefficient variations during operation) might yield more accurate and realistic results. Would the authors consider including such refinements in future studies to enhance the predictive power of their model?