Abstract is well written and provides a clear idea of the work to be done.

The title is suitable and gives a clear message about the work done. Authors have cited the relevant references from the gas turbine power cycles.

Comments on introduction/background

The introduction is well written and authors cover the recent literature related to the gas turbine bottoming cycle. Authors clearly mention the research gap and propose the objective of the study related to the gas turbine air bottoming cycle. Structure of the introduction is well connected to the proposed problem.

Comments on methodology

Modelling is based on the first law and second law of thermodynamics. Authors take suitable assumptions and the modelling is valid. Suitable performance parameters have taken to analyze the combined power cycle.

Comments on data and results

All governing parameters are clearly defined in the tabulated form with the proper unit and dimension. Graphical representation of the performance parameters are clear and provide justified reasoning. No repetitive results have seen in the manuscript. Authors clearly demonstrated the ratio of exergy destruction and exergy losses to the total exergy destruction for gas turbine, a gas turbine with air bottoming cycle and gas turbine with two air bottoming cycles.

Comments on discussion and conclusions

Results discussion covers multiple angles of the gas turbine air bottoming combine cycle. The discussion evaluates the impact modified gas turbine and air bottoming combined cycle on the work output efficiency and exergy destruction of the proposed systems. Authors suitably relate the finding of previous studies. All the results are suitable for publication. Authors have not proposed the scope of future work.