Poornima D

@srit.org

Assistant Professor, Department of Electrical and Electronics Engineering
Sri Ramakrishna Institute of Technology

Poornima D


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https://researchid.co/dpoornima

RESEARCH INTERESTS

Power Electronics, Renewable Energy
4

Scopus Publications

24

Scholar Citations

4

Scholar h-index

Scopus Publications

  • Experimental Investigation of Hybrid Photovoltaic-Thermoelectric Generator Systems for Enhanced Energy Conversion
    D. Poornima, S. Dhineswaran, K. Prasannakumar, C.V. Pavithra, R. Divya
    2025 2nd International Conference on Intelligent Technologies for Sustainable Electric and Communications Systems Itech Secom 2025, 2025
    This paper presents an experimental investigation of hybrid photovoltaic-thermoelectric generator (PV-TEG) systems designed to enhance overall energy conversion efficiency by utilising both solar radiation and waste heat. The research addresses efficiency losses in traditional PV systems due to temperature effects through the integration of thermoelectric generators that convert waste heat into additional electrical energy via the Seebeck effect. The experimental setup consists of monocrystalline PV panels integrated with bismuth telluride (<tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\text{Bi}_{2} \text{Te}_{3}$</tex>) based TEG modules arranged in a series configuration. A comprehensive four-day experimental study was conducted, measuring temperature differentials and TEG voltage outputs under varying environmental conditions. Results demonstrate TEG voltage outputs ranging from <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathbf{2 8}-\mathbf{1 1 2} \mathbf{~ m V}$</tex> with temperature differences between <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$2-4^{\circ} \mathrm{C}$</tex> across the hot and cold sides. Comparative analysis between PV-integrated and standalone TEG configurations shows enhanced performance in the hybrid system, with peak TEG output of 112 mV achieved when coupled with PV panels compared to 107 mV in standalone operation. MATLAB/Simulink simulations validate the experimental findings and demonstrate the feasibility of seriesparallel TEG configurations for optimised electrical output.
  • A Series Compensated Buck-Boost Converter-Based Thermoelectric Energy Harvesting System with Sliding Mode Controller
    D. Poornima, C. Vivekanandan
    Journal of Circuits Systems and Computers, 2024
    A thermoelectric generator (TEG) is a semiconductor-based device that can exhibit a flow of electric current through the external circuit if the sides of the TEG are subjected to a temperature difference caused by a heat source. The terminal voltage and the TEG’s internal resistance are altered depending on the temperature difference. Therefore, a suitable power electronic converter with a maximum power point tracking (MPPT) feature is required to harvest maximum power from the TEG and store the harvested energy in a battery-based energy storage system. This paper investigates a novel energy harvesting methodology from TEG using a series compensated buck-boost converter (SCBBC). MPPT has also been implemented using a sliding mode controller (SMC). A mathematical model of a TEG source has been developed in MATLAB-Simulink and tested with generic boost converter (GBC) and SCBBC for their dynamic performances during battery charging. The efficiency of conversion is found to be higher for SCBBC, at 97.87%. An experimental prototype has been developed with SCBBC and tested for two configurations, viz high voltage and low current configuration. The former configuration exhibits an efficiency of 86.3%, while the latter has an efficiency of 83%. The results indicate that SCBBC, along with SMC, opens up new efficient prospects for harvesting waste heat energy using TEGs.
  • Performance of Water Cooled Thermoelectric Generator System for Petrol Engines Using Ćuk Converter
    D. Poornima, C. Vivekanandan
    Proceedings 5th International Conference on Computing Methodologies and Communication Iccmc 2021, 2021
    Thermoelectric Generators (TEGs) are popular nowadays for their application in waste heat recovery from automobiles. 75% of the energy extracted from petrol is wasted as heat in an automobile IC engine. This emitted heat contributes a major part in increasing global warming due to the increasing amount of automobiles day to day. In this paper, a part of the heat wasted from the exhaust of a two-stroke petrol engine is converted into electricity and is utilized to charge the battery. The main purpose of this energy extraction and conversion is to cut down the amount of heat released from the automobile exhaust into the surroundings and thus encourage conscious use of energy. But one of the challenges in this conversion is that the output voltage and efficiency of a thermoelectric generator module are low for charging the battery. To rectify this, a Ćuk converter is utilized to boost the voltage of the TEG module. MPPT algorithm controller is also implemented to ensure maximum power extraction from the module at all times. In this paper, an attempt is made to cool the cold side of TEG using water flow rather than airflow. It is observed that the temperature difference between the hot and cool sides of the TEG reduces when water is used as a coolant and this significantly reduces the power output from the TEG when compared with an air-cooled system. Water-cooled TEG system output voltage does not reach the expected value and cannot be used to charge the battery. The comparison between an air-cooled and water-cooled TEG system is also done.
  • Idvc Based Hysteresis Controller for Three-Phase Induction Motor Drive
    S. Sangeetha, R. Mahalakshmi, D. Poornima
    Iop Conference Series Materials Science and Engineering, 2020
    Induction Motor is the most commonly used motor in industrial applications due to its characteristics like self-starting, reliable and easy speed control. The objective of the proposed system is to provide efficient speed control with lesser current harmonics. The Indirect Vector Control (IVDC) method is been presented for speed control of induction motor due to its high dynamic and low drift property. Though there were many classical methods for speed control like Ward-Leonard method etc.; in later years, power electronics circuits were preferred due to its high efficiency, reliability and accuracy. But the presence of static converter in drive circuits results in harmonics, giving in high feedback complexity. Therefore, the Hysteresis controller with conventional Proportional Integral and Differential (PID) control for speed and PI controller for flux is used to control the current harmonics at the point of common coupling. The simulation for speed control in squirrel-cage induction motor is carried out using the MATLAB/Simulink and the parameters like torque, speed, current and Total Harmonic Distortion are analyzed to show optimal response of drive system.

RECENT SCHOLAR PUBLICATIONS

  • Experimental Investigation of Hybrid Photovoltaic-Thermoelectric Generator Systems for Enhanced Energy Conversion
    D Poornima, S Dhineswaran, K Prasannakumar, CV Pavithra, R Divya
    2025 Second International Conference on Intelligent Technologies for … , 2025
    2025
  • A Series Compensated Buck-Boost Converter-Based Thermoelectric Energy Harvesting System with Sliding Mode Controller
    D Poornima, C Vivekanandan
    Journal of Circuits, Systems and Computers 33 (16), 2450290 , 2024
    2024
    Citations: 1
  • A novel battery less regulated output scheme for a hybrid solar photo voltaic and thermoelectric generation system
    D Poornima, C Vivekanandan
    2024
    Citations: 1
  • Review of Heat Recovery Applications of Thermoelectric Generators.
    D Poornima, C Vivekanandan, S Rajeswar
    Journal of Algebraic Statistics 13 (3) , 2022
    2022
    Citations: 1
  • Performance of Water Cooled Thermoelectric Generator System for Petrol Engines Using Ćuk Converter
    D Poornima, C Vivekanandan
    2021 5th International Conference on Computing Methodologies and … , 2021
    2021
    Citations: 7
  • Robotic technology for pandemic situation
    S Sangeetha, D Poornima
    Predictive and Preventive Measures for Covid-19 Pandemic, 273-292 , 2021
    2021
    Citations: 4
  • Idvc Based Hysteresis Controller For Three-Phase Induction Motor Drive
    S Sangeetha, R Mahalakshmi, D Poornima
    IOP Conference Series: Materials Science and Engineering 932 (1), 012085 , 2020
    2020
  • Cuk Converter for Waste Heat Recovery from Automobile Engine using Thermoelectric Generator with Air as Coolant
    SS D.Poornima
    International Journal of Innovative Technology and Exploring Engineering 9 … , 2020
    2020
    Citations: 5
  • A Single Source Cascaded Multilevel Inverter
    D Poornima, MR Bharath Kumar, F Andrew Mathew Domnic
    Int. J. of Electronics Engineering and Applications 7 (2) , 2019
    2019
  • Analysis of STATCOM with PSO Controller in Grid Connected Wind Energy Systems
    DP S.Sangeetha
    International Journal of Emerging Technologies and Innovative Research 6 (2 … , 2019
    2019
  • Design of a Biomass Cook stove with Co-generation Using Thermoelectric Generators
    D Poornima, S Sangeetha
    International Journal of Applied Engineering Research 13 (12), 11009-11012 , 2018
    2018
    Citations: 5
  • Harmonic Analysis of Three Phase Salient Pole Alternator under Various Loading Conditions using Power Quality Analyser
    GB Pradeep Balaji P, Sangeetha S, Maharaja K, Poornima D
    Journal of Advanced Research in Dynamical and Control Systems, 140-150 , 2017
    2017
  • Fuzzy MPPT Based Isolated Three Port Converter For Solar Applications
    S Aneesh, D Poornima
    International Journal of Innovative Science and Applied Engineering Research … , 2016
    2016
  • A single source cascaded multilevel inverter
    P D, MRB Kumar, FAM Dominic
    International Journal for Electrical and Electronic Applications 3 (2/3), 21-32 , 2014
    2014
  • An Innovative Multillevel Inverter Topology for Three Phase Motor Drives
    P D
    National Conference on Recent Advancements and Challenges in Electrical … , 2012
    2012
  • Bus Bar Design For Spike Reduction In An Industrial Inverter
    P D, K P
    National Conference on Innovations in Electrical,Eectronic and Control Systems , 2011
    2011
  • Advances Of Interior Permanent Magnet (Ipm) Wind Generators
    D Poornima
    National Conference on Intelligent Electrical Systems , 2009
    2009

MOST CITED SCHOLAR PUBLICATIONS

  • Performance of Water Cooled Thermoelectric Generator System for Petrol Engines Using Ćuk Converter
    D Poornima, C Vivekanandan
    2021 5th International Conference on Computing Methodologies and … , 2021
    2021
    Citations: 7
  • Cuk Converter for Waste Heat Recovery from Automobile Engine using Thermoelectric Generator with Air as Coolant
    SS D.Poornima
    International Journal of Innovative Technology and Exploring Engineering 9 … , 2020
    2020
    Citations: 5
  • Design of a Biomass Cook stove with Co-generation Using Thermoelectric Generators
    D Poornima, S Sangeetha
    International Journal of Applied Engineering Research 13 (12), 11009-11012 , 2018
    2018
    Citations: 5
  • Robotic technology for pandemic situation
    S Sangeetha, D Poornima
    Predictive and Preventive Measures for Covid-19 Pandemic, 273-292 , 2021
    2021
    Citations: 4
  • A Series Compensated Buck-Boost Converter-Based Thermoelectric Energy Harvesting System with Sliding Mode Controller
    D Poornima, C Vivekanandan
    Journal of Circuits, Systems and Computers 33 (16), 2450290 , 2024
    2024
    Citations: 1
  • A novel battery less regulated output scheme for a hybrid solar photo voltaic and thermoelectric generation system
    D Poornima, C Vivekanandan
    2024
    Citations: 1
  • Review of Heat Recovery Applications of Thermoelectric Generators.
    D Poornima, C Vivekanandan, S Rajeswar
    Journal of Algebraic Statistics 13 (3) , 2022
    2022
    Citations: 1
  • Experimental Investigation of Hybrid Photovoltaic-Thermoelectric Generator Systems for Enhanced Energy Conversion
    D Poornima, S Dhineswaran, K Prasannakumar, CV Pavithra, R Divya
    2025 Second International Conference on Intelligent Technologies for … , 2025
    2025
  • Idvc Based Hysteresis Controller For Three-Phase Induction Motor Drive
    S Sangeetha, R Mahalakshmi, D Poornima
    IOP Conference Series: Materials Science and Engineering 932 (1), 012085 , 2020
    2020
  • A Single Source Cascaded Multilevel Inverter
    D Poornima, MR Bharath Kumar, F Andrew Mathew Domnic
    Int. J. of Electronics Engineering and Applications 7 (2) , 2019
    2019
  • Analysis of STATCOM with PSO Controller in Grid Connected Wind Energy Systems
    DP S.Sangeetha
    International Journal of Emerging Technologies and Innovative Research 6 (2 … , 2019
    2019
  • Harmonic Analysis of Three Phase Salient Pole Alternator under Various Loading Conditions using Power Quality Analyser
    GB Pradeep Balaji P, Sangeetha S, Maharaja K, Poornima D
    Journal of Advanced Research in Dynamical and Control Systems, 140-150 , 2017
    2017
  • Fuzzy MPPT Based Isolated Three Port Converter For Solar Applications
    S Aneesh, D Poornima
    International Journal of Innovative Science and Applied Engineering Research … , 2016
    2016
  • A single source cascaded multilevel inverter
    P D, MRB Kumar, FAM Dominic
    International Journal for Electrical and Electronic Applications 3 (2/3), 21-32 , 2014
    2014
  • An Innovative Multillevel Inverter Topology for Three Phase Motor Drives
    P D
    National Conference on Recent Advancements and Challenges in Electrical … , 2012
    2012
  • Bus Bar Design For Spike Reduction In An Industrial Inverter
    P D, K P
    National Conference on Innovations in Electrical,Eectronic and Control Systems , 2011
    2011
  • Advances Of Interior Permanent Magnet (Ipm) Wind Generators
    D Poornima
    National Conference on Intelligent Electrical Systems , 2009
    2009