NITESH KUMAR CHOUDHARY - Academia.edu (original) (raw)
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Papers by NITESH KUMAR CHOUDHARY
MOJ ecology & environmental sciences, Jan 31, 2024
Energy wastage from power plants, which typically dissipates into the atmosphere, poses a signifi... more Energy wastage from power plants, which typically dissipates into the atmosphere, poses a significant challenge. The environmental consequences of such wasteful practices are manifold, contributing to climate change and resource depletion. The inefficient use of this waste heat contributes to economic and environmental concerns. Harnessing waste heat through integrating heat recovery systems with power plants effectively repurposing untapped energy. Addressing this issue optimizes energy utilization and aligns with the growing need for sustainable practices in the power generation sector. This study aims to harness the available waste heat by integrating an absorption cooling system (ACS) from the flue gas exhaust of a pressurized pulverized combined cycle power plant. Additionally, the thermodynamic performance of ACS with a cooling capacity of 30 tons has been examined. Using waste heat for cooling purposes offers a sustainable and efficient solution, reducing energy consumption and environmental impact. The working fluid used in the ACS is a binary mixture comprised of ammonia and water. Modelling and simulation were conducted using cycle tempo software, followed by energy analyses to assess the ACS's thermodynamic performance. The thermodynamic analysis discloses that the ACS achieves a coefficient of performance (COP) of 0.595. Additionally, variations in the temperatures of the generator, absorber, condenser, and evaporator significantly impact the COP of the ACS. This promising COP indicates the effectiveness of the ACS in harnessing waste heat for practical cooling applications, marking a substantial step towards sustainable energy utilization.
Department of Mechanical Engineering, National Institute of Technology Durgapur, Durgapur-713 209... more Department of Mechanical Engineering, National Institute of Technology Durgapur, Durgapur-713 209, West Bengal, India Mejia Thermal Power Station, Damodar Valley Corporation, Mejia-722 183, Bankura, West Bengal, India E-mail: sujitkarmakar@yahoo.com <em>Manuscript received online 16 June 2020, revised and accepted 11 August 2020</em> A thermodynamic study is carried out on a 500MWe coal based supercritical thermal power plant (base plant) with MonoEthanolAmine (MEA) based CO<sub>2</sub> capture unit integrated with a Kalina Cycle (Low-grade energy cycle) setup for Combined Cooling and Power (CCP) generation using Indian High Ash (HA) coal as fuel, and the results are compared with an imported Low Ash (LA) coal. The modelling and simulation of the different plant configurations are done by using the simulation software "Cycle-Tempo". The base plant is integrated with the CO<sub>2</sub>capture unit working on MEA based post combustion carb...
MOJ Ecology & Environmental Sciences, 2024
Energy wastage from power plants, which typically dissipates into the atmosphere, poses a signifi... more Energy wastage from power plants, which typically dissipates into the atmosphere, poses a significant challenge. The environmental consequences of such wasteful practices are manifold, contributing to climate change and resource depletion. The inefficient use of this waste heat contributes to economic and environmental concerns. Harnessing waste heat through integrating heat recovery systems with power plants effectively repurposing untapped energy. Addressing this issue optimizes energy utilization and aligns with the growing need for sustainable practices in the power generation sector. This study aims to harness the available waste heat by integrating an absorption cooling system (ACS) from the flue gas exhaust of a pressurized pulverized combined cycle power plant. Additionally, the thermodynamic performance of ACS with a cooling capacity of 30 tons has been examined. Using waste heat for cooling purposes offers a sustainable and efficient solution, reducing energy consumption and environmental impact. The working fluid used in the ACS is a binary mixture comprised of ammonia and water. Modelling and simulation were conducted using cycle tempo software, followed by energy analyses to assess the ACS's thermodynamic performance. The thermodynamic analysis discloses that the ACS achieves a coefficient of performance (COP) of 0.595. Additionally, variations in the temperatures of the generator, absorber, condenser, and evaporator significantly impact the COP of the ACS. This promising COP indicates the effectiveness of the ACS in harnessing waste heat for practical cooling applications, marking a substantial step towards sustainable energy utilization.
A thermodynamic study is carried out on a 500 MW e coal based supercritical thermal power plant (... more A thermodynamic study is carried out on a 500 MW e coal based supercritical thermal power plant (base plant) with Mono Ethanol Amine (MEA) based CO 2 capture unit integrated with a Kalina cycle (Low-grade energy cycle) setup for Combined Cooling and Power (CCP) generation using Indian High Ash (HA) coal as fuel, and the results are compared with an imported Low Ash (LA) coal. The modelling and simulation of the different plant configurations are done by using the simulation software "Cycle-Tempo". The base plant is integrated with the CO 2 capture unit working on MEA based post combustion carbon capture technique. The separated CO 2 is compressed to a pressure and temperature of 110 bar and 35ºC, respectively for ease of transportation and storage. During the four-stage CO 2 compression the heat wasted through the intercoolers is utilized by using Kalina cycle system. In Kalina cycle binary mixture of ammonia-water (NH 3-H 2 O) is used as a working fluid. This mixture passes through the intercoolers of the CO 2 compression system and got vaporized by utilizing the waste heat. Thereafter, the vapour passes through the two-stage turbines with reheater resulting in additional power generation. The mixture is throttled after the condenser produces the cooling effect. There is about 1.72% of energy efficiency improvement of the proposed integrated plant in comparison with the base plant with CO 2 capture. There is about 1.7 MW of additional electricity generation along with 5.7 MW of cooling effect (equivalent to 1632 TR) are obtained by this novel technique.
MOJ ecology & environmental sciences, Jan 31, 2024
Energy wastage from power plants, which typically dissipates into the atmosphere, poses a signifi... more Energy wastage from power plants, which typically dissipates into the atmosphere, poses a significant challenge. The environmental consequences of such wasteful practices are manifold, contributing to climate change and resource depletion. The inefficient use of this waste heat contributes to economic and environmental concerns. Harnessing waste heat through integrating heat recovery systems with power plants effectively repurposing untapped energy. Addressing this issue optimizes energy utilization and aligns with the growing need for sustainable practices in the power generation sector. This study aims to harness the available waste heat by integrating an absorption cooling system (ACS) from the flue gas exhaust of a pressurized pulverized combined cycle power plant. Additionally, the thermodynamic performance of ACS with a cooling capacity of 30 tons has been examined. Using waste heat for cooling purposes offers a sustainable and efficient solution, reducing energy consumption and environmental impact. The working fluid used in the ACS is a binary mixture comprised of ammonia and water. Modelling and simulation were conducted using cycle tempo software, followed by energy analyses to assess the ACS's thermodynamic performance. The thermodynamic analysis discloses that the ACS achieves a coefficient of performance (COP) of 0.595. Additionally, variations in the temperatures of the generator, absorber, condenser, and evaporator significantly impact the COP of the ACS. This promising COP indicates the effectiveness of the ACS in harnessing waste heat for practical cooling applications, marking a substantial step towards sustainable energy utilization.
Department of Mechanical Engineering, National Institute of Technology Durgapur, Durgapur-713 209... more Department of Mechanical Engineering, National Institute of Technology Durgapur, Durgapur-713 209, West Bengal, India Mejia Thermal Power Station, Damodar Valley Corporation, Mejia-722 183, Bankura, West Bengal, India E-mail: sujitkarmakar@yahoo.com <em>Manuscript received online 16 June 2020, revised and accepted 11 August 2020</em> A thermodynamic study is carried out on a 500MWe coal based supercritical thermal power plant (base plant) with MonoEthanolAmine (MEA) based CO<sub>2</sub> capture unit integrated with a Kalina Cycle (Low-grade energy cycle) setup for Combined Cooling and Power (CCP) generation using Indian High Ash (HA) coal as fuel, and the results are compared with an imported Low Ash (LA) coal. The modelling and simulation of the different plant configurations are done by using the simulation software "Cycle-Tempo". The base plant is integrated with the CO<sub>2</sub>capture unit working on MEA based post combustion carb...
MOJ Ecology & Environmental Sciences, 2024
Energy wastage from power plants, which typically dissipates into the atmosphere, poses a signifi... more Energy wastage from power plants, which typically dissipates into the atmosphere, poses a significant challenge. The environmental consequences of such wasteful practices are manifold, contributing to climate change and resource depletion. The inefficient use of this waste heat contributes to economic and environmental concerns. Harnessing waste heat through integrating heat recovery systems with power plants effectively repurposing untapped energy. Addressing this issue optimizes energy utilization and aligns with the growing need for sustainable practices in the power generation sector. This study aims to harness the available waste heat by integrating an absorption cooling system (ACS) from the flue gas exhaust of a pressurized pulverized combined cycle power plant. Additionally, the thermodynamic performance of ACS with a cooling capacity of 30 tons has been examined. Using waste heat for cooling purposes offers a sustainable and efficient solution, reducing energy consumption and environmental impact. The working fluid used in the ACS is a binary mixture comprised of ammonia and water. Modelling and simulation were conducted using cycle tempo software, followed by energy analyses to assess the ACS's thermodynamic performance. The thermodynamic analysis discloses that the ACS achieves a coefficient of performance (COP) of 0.595. Additionally, variations in the temperatures of the generator, absorber, condenser, and evaporator significantly impact the COP of the ACS. This promising COP indicates the effectiveness of the ACS in harnessing waste heat for practical cooling applications, marking a substantial step towards sustainable energy utilization.
A thermodynamic study is carried out on a 500 MW e coal based supercritical thermal power plant (... more A thermodynamic study is carried out on a 500 MW e coal based supercritical thermal power plant (base plant) with Mono Ethanol Amine (MEA) based CO 2 capture unit integrated with a Kalina cycle (Low-grade energy cycle) setup for Combined Cooling and Power (CCP) generation using Indian High Ash (HA) coal as fuel, and the results are compared with an imported Low Ash (LA) coal. The modelling and simulation of the different plant configurations are done by using the simulation software "Cycle-Tempo". The base plant is integrated with the CO 2 capture unit working on MEA based post combustion carbon capture technique. The separated CO 2 is compressed to a pressure and temperature of 110 bar and 35ºC, respectively for ease of transportation and storage. During the four-stage CO 2 compression the heat wasted through the intercoolers is utilized by using Kalina cycle system. In Kalina cycle binary mixture of ammonia-water (NH 3-H 2 O) is used as a working fluid. This mixture passes through the intercoolers of the CO 2 compression system and got vaporized by utilizing the waste heat. Thereafter, the vapour passes through the two-stage turbines with reheater resulting in additional power generation. The mixture is throttled after the condenser produces the cooling effect. There is about 1.72% of energy efficiency improvement of the proposed integrated plant in comparison with the base plant with CO 2 capture. There is about 1.7 MW of additional electricity generation along with 5.7 MW of cooling effect (equivalent to 1632 TR) are obtained by this novel technique.