team

Venkatarathnam, G.

Venkataraman and Sita Srinivasan Chair in Innovation
Professor of Mechanical Engineering

205 Refrigeration and Air Conditioning Laboratory

+91-44 -2257- 4685

gvenkat[at]iitm[.]ac[.]in

  • Development of new innovative refrigeration systems
  • Development of Low GWP Refrigerant mixture alternatives for R404A, R410A, R508B etc.
  • Artificial Intelligence and Machine learning methods for HVAC and Refrigeration systems
  • Development of Battery cooling system for an electric vehicle
  • Fault detection and diagnosis of large chillers
  • Fault detection and diagnosis of HVAC systems
  • Improvement of efficiency of Refrigeration and Air conditioning Systems
  • New refrigeration and liquefaction processes operating with mixtures
  • Heat exchangers – Modelling, additive manufacturing, testing
  • Thermodynamics of mixtures: Calculation of Phase envelopes, Next generation Multi-phase flash algorithms, Thermodynamic Property estimation software - MyProps
  • Cooling of Microscopes to cryogenic temperatures
  • Technology Innovation Platform (https://kite.iitm.ac.in)
  • Heat pump based drier
  • -80 Celsius Freezer
  • -55/-105 Celsius lyophilizer (Freeze drier)
  • Simulation and optimization of cross flow air cooled and Plate-fin heat exchangers, Software development
  • Optimization of flow path of a cross-flow heat exchanger using Ant Colony Optimization - MyCoil software

    Current Courses

  • ME1100 Thermodynamics (Undergraduate)
  • ME3250 Refrigeration and Air Conditioning (Undergraduate)
  • ME4100 Design Project (Undergraduate)
  • ME5132 Refrigeration and Cryogenics (Graduate)
  • ME5134 Process Simulation (Graduate)

  1. Vuppanapalli Chaitanya, S. Narasimhan, G. Venkatarathnam, Optimization of a Solvay cycle-based liquid air energy storage system, Energy,Volume 283, 2023,129051, https://doi.org/10.1016/j.energy.2023.129051.
  2. Rahul Kumar, Shankar Krishnapillai, G Venkatarathnam, Optimisation of flow paths of air-cooled heat exchangers, International Journal of Energy for a Clean Environment,Volume 24, Issue 4, 2023, pp. 53-65 (2023) doi://10.1615/InterJEnerCleanEnv.2022043633
  3. Vuppanapalli Chaitanya, S. Narasimhan, G. Venkatarathnam, A systematic method for performing pinch analysis of the Liquid Air Energy Storage (LAES) process, Computer Aided Chemical Engineering, Volume 52, Pages 3123-3128, (2023)
  4. Vineed Narayanan, G Venkatarathnam, Theoretical analysis of Rankine cycle operating with zeotropic mixtures of carbon dioxide and hydrocarbons, ASME Journal of Energy Resources Technology, 144 (6), 062103 (2022)
  5. T. Barath Adhithya and G. Venkatarathnam, New pressure and density based methods for isothermal-isobaric flash calculations, Fluid Phase Equilibria, 537, 112980 (2021)
  6. H. Kruthiventi and G. Venkatarathnam, Performance of J-T refrigerators operating with mixtures and coiled wire finned heat exchangers, Journal of Thermal Analysis and Calorimetry, 141, 2169–2175 (2020)
  7. Vineed Narayanan and G. Venkatarathnam, Prediction of vapour-liquid equilibria of binary mixtures of neon-nitrogen, neon-oxygen and neon-argon used in J-T refrigerators, Cryogenics, 106, 103039 (2020)
  8. Sunil Jerome and G. Venkatarathnam, Performance of a Linde-Hampson refrigerator operating from –120 °C to –60 °C with optimised R14-hydrocarbon mixtures exhibiting vapour-liquid-liquid equilibria, Heat Mass Transfer, doi:10.1007/s00231-019-02801-z (2019)
  9. R. Satya Maher and G. Venkatarathnam, Estimation of performance of a J-T Refrigerators Operating With Nitrogen-Hydrocarbon Mixtures and a Coiled tubes-in-tube heat exchanger, Cryogenics, 92, 27-35 (2018)
  10. I.Sujatha and G. Venkatarathnam, Comparison of performance of a vapor absorption refrigeration system operating with some hydrofluorocarbons and hydrofluoroolefins as refrigerants along with ionic liquid [hmim][TF2N] as the absorbent, Int. J. Refrigeration, 88,370-382 (2018)
  11. V. Narayanan and G. Venkatarathnam, Prediction of Vapour-Liquid and Vapour-Liquid-Liquid equilibria of nitrogen-hydrocarbon mixtures used in J-T refrigerators, Cryogenics, 90, 70-85 (2018)
  12. G. Venkatarathnam, density marching method for drawing phase envelopes: 3. P-xy diagrams of binary mixtures, Ind. Eng. Chem. Res., 56 (46), 13894–13904 (2017)
  13. I. Sujatha and G. Venkatarathnam, Performance of a vapor absorption heat transformer operating with ionic liquids and ammonia, Energy, 141, 924-936 (2017)
  14. S.S. Harish Kruthiventia and G. Venkatarathnam, Studies on capillary tube expansion device used in J-T refrigerators operating with nitrogen-hydrocarbon mixtures, Cryogenics, 87, October 2017, 76-84 (2017)
  15. H. Gurudath Nayak and G. Venkatarathnam, Occurrence of Dry out Phenomenon in an Auto Refrigerant Cascade Refrigerator operating with zeotropic mixtures, ASME J. Thermal Sci. Eng., 9(3):031012-031012-6. doi:10.1115/1.4035940 (2017).
  16. B. Sreenivas, H. Gurudath Nayak and G. Venkatarathnam, Relationship between composition of mixture charged and that in circulation in an auto refrigerant cascade and a J-T refrigerator operating in liquid refrigerant supply mode, Cryogenics 81, 42-46, (2017)
  17. Padmanabhan, C.S. Gurudath, Thota Srikanth, A Ambirajan, S.A. Basavaraj, Kumar Dinesh, and G. Venkatarathnam, Studies on Phase Shifting Mechanism in PulseTube Cryocooler, IOP Conf. Ser.: Mater. Sci. Eng. 171 012082 (2017)
  18. Vineed Narayanan, G VenkatarathnamExperimental investigation on mixed refrigerant cryocooler operating at 70 K for cooling high temperature superconductors, IOP Conference Series: Materials Science and Engineering 171 (1), 012073 (2017)
  19. V. Narayanan and G. Venkatarathnam, Performance of two mixed refrigerant processes providing refrigeration at 70K, Cryogenics, 78, 66-73 (2016)
  20. P.C. Jayanti, and G. Venkatarathnam, Identification of the phase of a substance from the derivatives of pressure, volume and temperature, without prior knowledge of saturation properties: Extension to solid phase, Fluid Phase Equilibria, 425, 269-277 (2016)
  21. G. Sharma, R.L. Gardas, A. Coronas and G. Venkatarathnam, Effect of anion chain length on physicochemical properties of N, N-dimethylethanolammonium based protic ionic liquids, Fluid Phase Equilibria, 415, 1-7 (2016)
  22. Harish Kruthiventi SS, Venkatarathnam GG. Comparison of the Straight Adiabatic Capillary Tube Expansion Devices Used in Refrigeration Systems Operating With Refrigerants R134a and R1234yf. ASME. J. Thermal Sci. Eng. Appl., 8, 021015-1–021015-7 (2016)
  23. G.S.C. Prasad, C.S. Kumar, S.S. Murthy and G. Venkatarathnam, Performance of an organic Rankine cycle with multicomponent mixtures,Energy, 88, 690-696 (2015)
  24. B. Sreenivas, D.R. Patel, S.S. Murthy, and G. Venkatarathnam, Performance of mixed refrigerant cascade refrigerator for cooling a space simulation chamber, Indian Journal of Cryogenics 39 (1), 81-85 (2014)
  25. G. Venkatarathnam, Density Marching Method for Calculating Phase Envelopes, Ind. Eng. Chem. Res. 53, 3723-3730 (2014)
  26. G. Venkatarathnam, Density marching method for calculating phase envelopes: Part II – Three-phase envelopes, Ind. Eng. Chem. Res. Vol. 53, 12122-12128 (2014)
  27. Sumit K. Swarnkar, S. Srinivasa Murthy, Ramesh Gardas and G. Venkatarathnam, Performance of a vapour absorption refrigeration system operating with ionic liquid-ammonia combination with water as cosolvent, Applied Thermal Eng. Vol. 72, 249-256 (2014)

  1. G. Venkatarathnam, MyCOIL – A program for the rating and optimisation of the flow path of air-cooled heat exchangers, Paper No. 384, Proceedings of the ISHMT-ASTFE Heat and Mass Transfer conference (IHMTC 2021) 17-20th December, 2021
  2. . Barath Adithya and G. Venkatarathnam, A review of second-order isobaric-isothermal flash calculations, paper no. NCCS_TP_1029, National conference on Cryogenics for Space, Thiruvanathapuram, 12-14, December 2019
  3. V. Chaitanya, S. Narasimhan and G. Venkatarathnam, Effect of assumption of common stream temperature in the simulation of multistream heat exchangers on the overall process efficiency, paper no. NCCS_TP_1015, National conference on Cryogenics for Space, Thiruvanathapuram, 12-14, December 2019
  4. G. Venkatarathnam, Some exciting developments in cryogenic engineering applications, Invited paper, National conference on Cryogenics for Space, Thiruvanathapuram, 12-14, December 2019
  5. G. Venkatarathnam, Alternatives for low GWP refrigerants for India, Invited paper, International conference on Recent advancements in Air conditioning and Refrigeration, RAAR-2019, Bhubaneswar, 28-30, November 2019
  6. G. Venkatarathnam, Performance of A Small Nitrogen Liquefier, 27th “National Symposium on Cryogenics and Superconductivity, Mumbai, January 16-18, 2019
  7. G. Venkatarathnam, Three-phase routines for the NIST Refprop program, 27th “National Symposium on Cryogenics and Superconductivity, Mumbai, January 16-18, 2019
  8. H. Gurudath Nayak and G. Venkatarathnam, Performance of an auto refrigerant cascade refrigerator operating in gas refrigerant supply mode with optimized nitrogen- hydrocarbon refrigerant mixtures, Paper No. PA-C-001,the sixth International Conference on Cryogenics and Refrigeration, April 12–14, 2018 at Shanghai Jiao Tong University, Shanghai, China
  9. G. Venkatarathnam, Thermodynamics of refrigerant mixtures used in J-T refrigerators, Presented at the 26th International Cryogenic Engineering Conference, March 7-11, 2016, New Delhi
  10. G. Venkatarathnam, Thermodynamics of refrigerant mixtures used in Cryogenic Mixed Refrigerant Processes, National Symposium on Cryogenics, Hyderabad, December 8-10, 2014, Hyderabad, India
  11. Sunil Jerome and G. Venkatarathnam, Comparatative study of Helmholtz, Peng-Robinson and PC-SAFT equation of state applied to a J-T Cryocooler, National Symposium on Cryogenics, Hyderabad, December 8-10, 2014, Hyderabad, India
  12. Vineed Narayanan and G. Venkatarathnam, A mixed refirgerant cycle for providing refrigeration below 70 K for superconducting application, National Symposium on Cryogenics, Hyderabad, December 8-10, 2014, Hyderabad, India

  1. Venkatarathnam, G., System and method for the liquefaction of feed fluid operating at high ambient temperature, Indian Patent No. 352407 (2020)
  2. Venkatarathnam, G., Refrigerant composition and process for preparation thereof, US Patent No. 7722780 (2010)
  3. Venkatarathnam, G., Refrigerant composition for refrigeration systems, US Patent No. 7582223 (2010)
  4. Venkatarathnam, G., A refrigerant composition for refrigeration systems, India Patent No. 211627 (2007)
  5. Venkatarathnam, G., A refrigerant composition for a single stage refrigeration system, India Patent No. 205644 (2007)
  6. Venkatarathnam, G., A refrigerant composition for refrigeration systems, India Patent No. 197997 (2006)

  1. G. Venkatarathnam, Cryogenic Mixed Refrigerant Processes, Springer, New York, NY, USA, ISBN 978-0-387-78513-4 (2008)\
  2. L.R. Oellrich, T. Engler, S. Srinivasa Murthy, G. Venkatarathnam and A.R. Balakrishnan, Refrigerant Mixtures as Alternatives to HCFC22 and R502: Systematic screening and Pinch Point Studies, Forschungsberichte des Deutschen Kälte-und Klimatechnischen Verenins Nr. 54, Germany, ISBN 3-922-429-39-4 (1997)
  3. G. Venkatarathnam, Cryogenic Heat Exchangers, Heat exchanger design handbook (HEDH), (2017) https://hedhme.com/content_map/?link_id=30121&article_id=15668