News and Publications - INDEE+

News and publications

News and publications

Journal Papers

  1. S, Vaishak., Singha, P., Dasgupta, M.S., Hafner, A., Widell, K., Bhattacharyya, S., Saini, S.K., Arun, B., Samuel, M.P., Ninan, G., 2023. Performance analysis of a CO2/NH3 cascade refrigeration system with subcooling for low temperature freezing applications. Int. J. Refrig. https://doi.org/10.1016/J.IJREFRIG.2023.05.013 
  2. Guruchethan, A.M., Reddy, Y.S.K., Maiya, M.P. and Hafner, A., 2023. Performance evaluation of absorption cooling assisted transcritical CO2 refrigeration systems. International Journal of Refrigeration. https://doi.org/10.1016/j.ijrefrig.2023.09.012 
  3. Guruchethan, A.M., Sharma, V., Maiya, M.P. Hafner, A., 2023. Performance evaluation of transcritical CO2 refrigeration system for simultaneous heating and cooling applications. Sādhanā 48, 212. https://doi.org/10.1007/s12046-023-02269-y
  4. Guruchethan, A. M., Reddy, Y. S. K., Maiya, M. P., & Hafner, A. (2024). Experimental investigation of multi-ejector CO2 heat pump system with and without IHX. Energy, 297, 131328. https://doi.org/10.1016/j.energy.2024.131328 
  5. Reddy, Y. S. K., Guruchethan, A. M., Singh, S., Kumar, S., Maiya, M. P., & Hafner, A. (2024). CO2 heat pump integrated thermal storage for domestic hot water in hotels. Journal of Building Engineering, 89, 109270. https://doi.org/10.1016/j.jobe.2024.109270
  6. B.S. Arun, G. Ninan, S. Murali, M. Samuel, S. Kumar, S. Vaishak, M.S. Dasgupta, S.K. Kochunni, A. Hafner, K.N. Widell, Study on various hot-gas defrosting configurations for CO2-NH3 cascade deep freezer, Int. J. Air-Conditioning Refrig. 32 (2024) 6. https://doi.org/10.1007/s44189-024-00049-9
  7. Singha, P., Dasgupta, M. S., Bhattacharyya, S., and Hafner, A., “Energy, environmental, and economic analysis of novel R744/R290 cascade refrigeration systems designed for warm ambient conditions utilizing ejector,” Therm. Sci. Eng. Prog., vol. 53, p. 102724, Aug. 2024, https://doi.org/10.1016/j.tsep.2024.102724
  8. Singha, P., Dasgupta, M. S., Bhattacharyya, S., and Hafner, A., “Study of thermoelectric subcooling on small-scale CO2 transcritical systems for performance improvement with and without ejector and heat recovery,” J. Phys. Conf. Ser., vol. 2818, no. 1, 2024, https://doi: 10.1088/1742-6596/2818/1/012025
  9. Singha, P., S., Vaishak, Dasgupta, M. S., Bhattacharyya, S., and Hafner, A., “Investigation of     economizer with screw compressor to provide subcooling and enhance COP in various natural refrigerant based cascade freezer,” vol. 2, pp. 305–317, 2023. Advances in Clean Energy and Sustainability, Volume 2. eBook ISBN 978-981-97-5419-9. Print ISBN. 978-981-97-5418-2. https://doi.org/10.1007/978-981-97-5419-9_26 
  10. Reddy, Y. S. K., Guruchethan, A. M., Kochunni, S. K., Singh, S., Maiya, M. P., & Hafner, A. (2024). R744 heat pump driven liquid desiccant air conditioning system for hot and humid climates. Thermal Science and Engineering Progress, 56, 103079. https://doi.org/10.1016/j.tsep.2024.103079
  11. Singha, P., Das, C., Dasgupta, M.S., Bhattacharyya S., Hafner A., New approach to improve COP and heat recovery in transcritical CO2 refrigeration system for milk processing application. Sci Rep 15, 5502 (2025). https://doi.org/10.1038/s41598-025-90067-3  
  12. Singha, P., Das, C., Köster, L., Kochunni, S.K., Dasgupta, M.S., Widell, K.N., Bhattacharyya, S., Hafner, A., 2025. Thermodynamic comparison of various refrigerants for an on-board R290 refrigeration system with economizer subcooling in small fishing boats. Therm. Sci. Eng. Prog. 103443. https://doi.org/10.1016/J.TSEP.2025.103443 
  13. Singha, P., Vaishak, S., Dasgupta, M.S., Bhattacharyya S., Hafner A., Performance evaluation of natural refrigerant pairs R744/R717 and R744/R290 in cascade systems with IHX and economizer configurations for individual quick freezers. Sadhana, (2025). https://doi.org/10.1007/s12046-025-02808-9 

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Conference Proceedings

  • Singh, S., Selvnes, H., Pardiñas, A., Reddy, S., Gupta, P., Vaishak S, Arun B.S, Widell, K., Elarga, H., Hafner, A., 2022 “Advanced R744 solution for supermarkets, hotel chillers and maritime applications in India” 14th Gustav Lorentzen Natural Working Refrigerants, Trondheim, Norway, June 13-15th 2022. http://dx.doi.org/10.18462/iir.gl2022.0242 
  • Guruchethan, A.M., Maiya, M.P., Hafner, A., 2022. Effect of subcooling using expander-compressor unit in transcritical CO2 systems. 15th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2022). Proceedings. Trondheim, Norway, June 13-15th 2022. http://dx.doi.org/10.18462/iir.gl2022.0109  
  • Singh, S,. Hafner,A., Elarga, H., Sharma, K.,  2023 “Integrated R744 Heat Pump/chiller for Hotel: State-of-the-Art Implementation”, 26th International Congress of Refrigeration, Paris, France, Aug 21 - 25, 2023. http://dx.doi.org/10.18462/iir.icr.2023.0645 
  • Gupta P., Kumar P., Hafner A., Elagra H., “Refrigerated Transportation and Cold-chain Logistics in India – Current Status and Future Prospect”, 26th International Congress of Refrigeration, Paris, France, Aug 21 - 25, 2023. http://dx.doi.org/10.18462/iir.icr.2023.0371  
  • Gupta P., Kumar P, Rao SMV, Hafner A, Hybrid ANN model for estimating performance parameters of supersonic air ejectors, 10th International and 50th National Conference on Fluid Mechanics and Fluid Power (FMFP) IIT Jodhpur, India, Dec 20 - 22, 2023, https://www.researchgate.net/publication/376757737  
  • Laguri ., Kumar K., Kumar P., Kamath R.P., Venkateswaram M.B., Lokanadham N.K., Hafner A., 2021. Performance analysis of CO2/natural refrigerants for cascade refrigeration system, 6th International Conference on Polygeneration-ICP-2021, Published in the International Journal of Thermal Science and engineering progress. https://www.researchgate.net/publication/355476251
  • Laguri V., Kumar K., Gupta P., Rao S.M.V., Kumar P., Hafner A., Elagra H. “Thermodynamic analysis of a multi-evaporator propane refrigeration cycle using a two-phase ejector as an expansion device”. 26th International Congress of Refrigeration, Paris, France, Aug 21 - 25, 2023. https://doi.org/10.18462/iir.icr.2023.0494
  • Vaishak, S., Singha P., Dasgupta M.S, Bhattacharyya S., Singh S., Hafner A., Evaluation of various subcooling techniques in an ejector-based CO2 transcritical refrigeration system for hot climate operation. 26th International Conference of Refrigeration, ICR 2023 held on 21 – 25th August. http://dx.doi.org/10.18462/iir.icr.2023.0166 
  • Singha P., Vaishak, S., Dasgupta M.S, Bhattacharyya S., Singh S., Hafner A.  Performance analysis of a CO2 based milk chiller with evaporative cooling arrangement operating in hot climate. 26th International Conference of Refrigeration, ICR 2023 held on 21 – 25th August.   http://dx.doi.org/10.18462/iir.icr.2023.0179
  • Arun B.S, Sumit Kumar, Murali S, George Ninan, Manoj Samuel, Kristina Norne Widell, Singh S, Hagar Elagra, Armin Hafner. Study on retaining natural refrigerant in seafood processing industries in India. 26th International Conference of Refrigeration, ICR 2023 held on 21 – 25th August.  http://dx.doi.org/10.18462/iir.icr.2023.0091 
  • Reddy Y.S.K, Elarga H., Guruchethan A.M., Maiya M.P., Hafner A. Advantage of CO2 heat pump chiller for the application in Indian hotels. 26th International Conference of Refrigeration, ICR 2023 held on 21 – 25th August.   
  • http://dx.doi.org/10.18462/iir.icr.2023.0607
  • Reddy Y.S.K, Guruchethan A.M., Maiya M.P., Hafner A. Performance evaluation of CO2 heat pump-driven liquid desiccant air conditioning system in hot and humid climates. 26th International Conference of Refrigeration, ICR 2023 held on 21 – 25th August. http://dx.doi.org/10.18462/iir.icr.2023.0610 
  • Guruchethan A.M., Reddy Y.S.K, Maiya M.P., Hafner A. Experimental Investigation of Multi-Ejector CO2 Heat Pump System with and without IHX. 7th International Conference on Polygeneration, ICP 2023 held on 26th to 28th July. https://ideas.repec.org/a/eee/energy/v297y2024ics0360544224011010.html 
  • Reddy Y.S.K, Guruchethan A.M., Singh, S., Kochunni SK, Maiya M.P., Hafner A, “CO2 heat pump for Indian hospitals”. 9th Thermal and Fluids Engineering Conference, ASTFE, Oregon State University, Corvallis, OR, USA, April, 21-24, 2024. DOI: http://dx.doi.org/10.1615/TFEC2024.hpu.051287
  • Reddy Y.S.K, Guruchethan A.M., Singh, S., Kochunni SK, Maiya M.P., Hafner A,, “CO2 heat pump with and without cooling for hot water production in tropical climates”, 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants, University of Maryland, College Park, Maryland, USA, August, 11-14, 2024.  http://dx.doi.org/10.18462/iir.gl.2024.1238 
  • Singha, P., Das, C., Köster, L., and Kochunni, S. K., “Performance Analysis of an Active On-Board Refrigeration System Using propane for Improved Fish Preservation in Small Fishing Boats,” no. d, 2024 http://dx.doi.org/10.18462/iir.gl2024.1192 
  • Somasundaram, V., Singha, P., Dasgupta, M. S., Hafner, A., and Bhattacharyya, S., “Performance Analysis of an Ejector Based CO2 Transcritical Refrigeration System with Integrated Mechanical Subcooling For Dairy Application,” 2024. doi: https://doi.org/10.1063/5.0182904 
  • Sumit Kumar, B. S. Arun, Murali S, George Ninan, Maddali Ramgopal, Manoj Samuel, Lukas Köster, Jan Bengsch, Kristina N Widell, Armin Hafner, Saju George, Kolliyil Ashraf Hashmin. “Performance testing of CO2-NH3 cascade freezer for seafood processing”. 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants, University of Maryland, College Park, Maryland, USA, August, 11-14, 2024. http://dx.doi.org/10.18462/iir.gl.2024.1170 
  • Lukas Köster, Prosenjit Singha, Chayan Das, Jan Bengsch, Armin Hafner, Mani Sankar Dasgupta, Sarun Kumar Kochunni, Kristina Norne Widell. “Modelling of an onboard R290 refrigerated sea water (RSW) system for ice production on small fishing vessels in India”. 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants, University of Maryland, College Park, Maryland, USA, August, 11-14, 2024. http://dx.doi.org/10.18462/iir.gl2024.1187 
  • Simarpreet Singh, Sarun Kumar Kochunni, Armin Hafner. “Retrofitting potential of R744 heat pump/chiller for a multispecialty hospital”. 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants, University of Maryland, College Park, Maryland, USA, August, 11-14, 2024.  http://dx.doi.org/10.18462/iir.gl.2024.1232 
  • Marco Bless, Davide Tommasini, Vinod Laguri, Krzysztof Banasiak, Armin Hafner, Pramod Kumar “Model based performance analysis of a transcritical combined heating and cooling CO2 cycle for a school cantina in India”. 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants, University of Maryland, College Park, Maryland, USA, August, 11-14, 2024, http://dx.doi.org/10.18462/iir.gl2024.1186 
  • Sarun Kumar Kochunni, Simarpreet Singh, Marco Bless, Arun BS, Lukas Köster, Sumit Kumar, Prosenjit Singha, Davide Tommasini, Chayan Das, Vinod Laguri, Armin Hafner. Upcoming natural refrigerant-driven heating and cooling systems in India. 11th IIR Conference on Compressors and Refrigerants - Proceedings. International Institute of Refrigeration 2024. http://dx.doi.org/10.18462/iir.compr.2024.0657 

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