SHAMMY KUMAR SAH

@iitb.ac.in

Post Doctoral Fellow at Heat Pump Laboratory, Mechanical Engineering Department
IIT Bombay

SHAMMY KUMAR SAH


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https://researchid.co/shammy1912
Dr. Shammy Kumar Sah is a Post-Doctoral Research Fellow at IIT Bombay specializing in thermal engineering, HVAC systems, heat pumps, and sustainable energy technologies. I completed my PhD at IIT Roorkee, where I worked on indoor climate control using Ground Source Heat Pump systems under a DST–EPSRC funded project. My research includes energy optimization, radiant cooling systems, and experimental thermal analysis. I have published several international journal and conference papers in leading engineering platforms.

EDUCATION

Post-Doctoral (Thermal Engineering from Indian Institute of Technology Bombay, India) - Ongoing
PhD (Thermal Engineering from Indian Institute of Technology Roorkee, India) - 2024
M.Tech (Thermal Engineering from Indian Institute of Technology BHU Varanasi, India) 2014
B.Tech (Mechanical Engineering from M.M.M Engineering College, Gorakhpur, India) 2011

RESEARCH, TEACHING, or OTHER INTERESTS

Mechanical Engineering, Renewable Energy, Sustainability and the Environment, Energy, Building and Construction
5

Scopus Publications

36

Scholar Citations

3

Scholar h-index

2

Scholar i10-index

Scopus Publications

  • Experimental comparison of First-law analysis of peak hour operation of GSHP system under optimized conditions
    Shammy Kumar Sah, Krishnan Murugesan, Elangovan Rajasekar
    Applied Thermal Engineering, 2025
  • Experimental Investigation of Energy-Saving Potential of Ground Source Heat Pump During Peak Hour Operations
    Shammy Kumar Sah, Krishnan Murugesan, Elangovan Rajasekar
    Journal of Thermal Science and Engineering Applications, 2024
    Ground-source heat pump (GSHP) systems have emerged as energy-efficient alternate systems for the conventional Air-Source Air-Conditioning (ASAC) systems for space heating and cooling applications. GSHPs have gained widespread popularity globally and are extensively utilized in residential and commercial buildings. However, in countries like India where both space cooling and heating are required, it becomes essential to evaluate the performance of the GSHP system, especially during peak-hour operation to estimate peak load energy demand. This research paper tries to identify the energy efficiency of the GSHP system during peak-hour operations in comparison to the ASAC system using experimental techniques. Experimental trials were conducted in a laboratory equipped with a single unit of 17.58 kW cooling/heating capacity GSHP system and a 17.57 kW cooling/heating ASAC system (two units of 7.023 kW and 10.548 kW). Experimental trials were conducted in peak summer in the month of June for cooling mode operation and January for heating mode operation for Roorkee weather conditions in the northern part of India. The performance of both systems was compared by defining instantaneous coefficient of performance (COP) and cyclic COP. The instantaneous COP was found to be higher for both the systems during peak-hour cooling and heating mode operations. Energy-saving analysis indicates that the ground-source heat pump system saves 36.85% and 38.65% of electrical energy in cooling and heating modes, respectively, compared to the ASAC system.
  • Time Lag Characteristics of Building Envelop Materials on Peak Energy Demand in Typical Hot and Humid Climate of India
    Shammy Kumar Sah, Krishnan Murugesan, Elangovan Rajasekar
    Journal of Engineering for Sustainable Buildings and Cities, 2023
    Using a one-dimensional model for transient heat conduction through building enclosure walls, the present research examines the effects of thermophysical building envelop parameters on transient heat exchange, peak cooling, and heating load for northern part of India. For space cooling and heating applications, the thermal performance of four distinct walling systems commonly employed in the climatic conditions of India was examined. Results demonstrate that when the thermal conductivity of the wall increases, the time lag reduces. As wall thickness rises from 230 mm to 310 mm, there is an increase in the time lag during cooling and heating modes. Additionally, the results show that the time lag between conduction and solar load increases as wall thickness increases. As wall thermal mass increased by 20% in cooling mode, the time of peak load was shifted by 2 h. When operating in cooling mode in contrast to heating mode, high thermal mass is more effective in shifting the time of occurrence of peak energy consumption.
  • Experimental and energy saving potential analysis of GSHP and ASAC systems using normalized sensitivity technique in cooling mode operation
    Shammy Kumar Sah, Murugesan Krishnan, Rajasekar Elangovan
    Advances in Building Energy Research, 2023
    The current investigation examines the experimental and energy-conservation analyses of 17.5 kW cooling capacity of a ground-source heat pump (GSHP) system and an air-source air-conditioning system (ASAC) of the same cooling capacity. Using experimental data and a sensitivity technique, the thermal efficiency of both the systems were evaluated. During the experiments conducted for cooling period in June 2022, the data for six-day operation were collected and the coefficient of performance of both the systems were evaluated. Notably, the GSHP system exhibited an average cooling capacity of 10 to 15 kW, whereas the ASAC maintained a range of 9 and 13 kW. The coefficient of performance (COP) for the GSHP system was obtained as 3.8, while the ASAC system COP was 2.9. The results indicate that the use of GSHP system results in an energy-saving of 10–40% in comparison to the ASAC system. Moreover, the present study included uncertainty and propagation analyses, along with sensitivity evaluations, with the objective of identifying the most influencing parameter on the derived parameters. Sensitivity analysis indicates outlet temperature of air from the evaporator is the most influencing parameter for the performance of both the systems.
  • Optimization of energy consumption for indoor climate control using Taguchi technique and utility concept
    Shammy Kumar Sah, Krishnan Murugesan, Rajasekar Elangovan
    Science and Technology for the Built Environment, 2021
    In this research work, results on optimization of parameters related to energy consumption for indoor climate control of a building enclosure are discussed. The analysis is carried out for a building unit maintained at comfort level using Mitsubishi 1.5 ton of refrigeration split air conditioner. A mathematical model based on energy balance and experimental trials were used to compute energy consumption for space cooling/heating conditions. For the purpose of optimization, six control variables at three levels have been chosen from environment, thermo-physical properties, and geometrical variables. Taguchi optimization was carried out using L27 orthogonal arrays to obtain an experimental test strategy for cooling and heating modes, which gives rise to two sets of parameters. With the implementation of utility concept, a single set of optimum level parameters were obtained for both heating and cooling mode operations. Taguchi technique predicted 1.606 kW and 1.252 kW as optimum energy consumption for space cooling and heating modes, respectively with 95% confidence level. Inside humidity ratio, overall heat transfer coefficient and wall to window ratio are predicted as the most influencing parameters for both cooling mode and heating mode operations by the Taguchi method and utility analysis.

RECENT SCHOLAR PUBLICATIONS

  • Experimental comparison of First-law analysis of peak hour operation of GSHP system under optimized conditions
    SK Sah, K Murugesan, E Rajasekar
    Applied Thermal Engineering 258 (Part A), 124525 , 2024
    2024
    Citations: 8
  • Experimental investigation of energy-saving potential of ground source heat pump during peak hour operations
    SK Sah, K Murugesan, E Rajasekar
    Journal of Thermal Science and Engineering Applications 16 (2), 021010 , 2024
    2024
    Citations: 12
  • Experimental and energy saving potential analysis of GSHP and ASAC systems using normalized sensitivity technique in cooling mode operation
    SK Sah, K Murugesan, E Rajasekar
    Advances in Building Energy Research 17 (5), 507-535 , 2023
    2023
  • Time Lag Characteristics of Building Envelop Materials on Peak Energy Demand in Typical Hot and Humid Climate of India
    SK Sah, K Murugesan, E Rajasekar
    ASME Journal of Engineering for Sustainable Buildings and Cities 4 (2), 021002 , 2023
    2023
    Citations: 3
  • Optimization of energy consumption for indoor climate control using Taguchi technique and utility concept
    SK Sah, K Murugesan, E Rajasekar
    Science and Technology for the Built Environment 27 (10), 1473-1491 , 2021
    2021
    Citations: 13
  • Numerical computation of time lag and decrement factor for different building wall materials
    SK Sah, K Murugesan, E Rajasekar
    Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and … , 2021
    2021
  • Study of peak load condition during indoor climate control for Roorkee weather conditions
    SK Sah, K Murugesan, E Rajasekar
    Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and … , 2019
    2019

MOST CITED SCHOLAR PUBLICATIONS

  • Optimization of energy consumption for indoor climate control using Taguchi technique and utility concept
    SK Sah, K Murugesan, E Rajasekar
    Science and Technology for the Built Environment 27 (10), 1473-1491 , 2021
    2021
    Citations: 13
  • Experimental investigation of energy-saving potential of ground source heat pump during peak hour operations
    SK Sah, K Murugesan, E Rajasekar
    Journal of Thermal Science and Engineering Applications 16 (2), 021010 , 2024
    2024
    Citations: 12
  • Experimental comparison of First-law analysis of peak hour operation of GSHP system under optimized conditions
    SK Sah, K Murugesan, E Rajasekar
    Applied Thermal Engineering 258 (Part A), 124525 , 2024
    2024
    Citations: 8
  • Time Lag Characteristics of Building Envelop Materials on Peak Energy Demand in Typical Hot and Humid Climate of India
    SK Sah, K Murugesan, E Rajasekar
    ASME Journal of Engineering for Sustainable Buildings and Cities 4 (2), 021002 , 2023
    2023
    Citations: 3
  • Experimental and energy saving potential analysis of GSHP and ASAC systems using normalized sensitivity technique in cooling mode operation
    SK Sah, K Murugesan, E Rajasekar
    Advances in Building Energy Research 17 (5), 507-535 , 2023
    2023
  • Numerical computation of time lag and decrement factor for different building wall materials
    SK Sah, K Murugesan, E Rajasekar
    Proceedings of the 26thNational and 4th International ISHMT-ASTFE Heat and … , 2021
    2021
  • Study of peak load condition during indoor climate control for Roorkee weather conditions
    SK Sah, K Murugesan, E Rajasekar
    Proceedings of the 25th National and 3rd International ISHMT-ASTFE Heat and … , 2019
    2019

Publications

International Journal Publications
1. Sah, S. K., Murugesan, K., & Elangovan, R. ‘Experimental comparison of first-law analysis of peak hour operations of GSHP system under optimized operating conditions’, Applied Thermal Engineering, 258(Part A), 124525.
2. Sah, S. K., Murugesan, K., & Elangovan, R., ‘Experimental investigation of energy saving potential of ground source heat pump during peak hour operations’ ‘ASME Journal of Thermal Science and Engineering Applications’, 16(2), 1–13. .
3. Sah, S. K., Murugesan, K., & Elangovan, R. ‘Time lag characteristics of building envelope materials on peak energy demand in typical hot and humid climate of India’. ‘ASME Journal of Engineering for Sustainable Buildings and Cities, 4(2), 1–13. .
4. Sah, S. K., Murugesan, K., & Elangovan, R. ‘Experimental and energy-saving potential analysis of GSHP and ASAC system using normalized sensitivity technique in cooling mode operation’. Advances in Building Energy Research, 17(5), 507–535. .
5. Sah, S. K., Murugesan, K., & Elangovan, R. ‘Optimization of energy consumption for indoor climate control using Taguchi technique and utility concept’ ‘Science and Technology for Built Environment, 27(10), 1473–1491.