Enhanced Solar Desalination Using Natural Dolomite-Integrated PCM and MWCN Thermal Storage: An Experimental Study Krupakaran R L, Ratnakamala Petla, Praveen Anchupogu, Umamaheswarrao P, R Satya Meher, et al. SAE Technical Papers, 2026 <div class="section abstract"><div class="htmlview paragraph">Systems for solar desalination provide a practical and environmentally friendly way to turn salty or polluted water into drinkable water. Three configurations are experimentally investigated in this study: a traditional solar desalination system, a system integrated with a thermal energy storage unit (TESU) based on phase change material (PCM), Multi wall Carbon nano Tube were mixed with PCM at 2% of total volume of the PCM and a system that incorporates powdered natural dolomite/MWCNT at 1% each into the PCM-based TESU. Each of the four configurations was created, tested simultaneously, and thoroughly examined. In comparison to the Standard Still (SS), the experimental findings showed that the adoption of PCM-based TESUs increased daily cumulative water output (collection efficiency) by 24%, 26% with addition of MWCNT and the addition of dolomite powder/MWCNT further increased productivity by 27%. The average exergy efficiencies for for SS, SS with PCM, SS with nano enriched PCM, and SS on PCM with MWCNT/dolomite were 1.02%, 1.25%, 1.34% and 1.6%, respectively compared to SS without PCM.</div></div>
Experimental and machine learning-based investigation on the engine parameters of the reactivity controlled compression ignition engine fueled with microalgae biodiesel blends, n-butanol and hydrogen gas Anchupogu Praveen, R. L. Krupakaran, S. Narasimha Kumar, Kishorekumar Paleti, S. Jayavelu, et al. Environmental Progress and Sustainable Energy, 2026 The study aims to investigate the combustion, performance and emission behavior of an reactivity controlled compression ignition (RCCI) engine using Chlorella vulgaris microalgae biodiesel (CMBD) as high reactivity fuel, n‐butanol and hydrogen gas as a low reactivity and supplementary fuels. The CMBD fuel is prepared with the aid of transesterification process and characterized by Fourier Transform Infrared Spectroscopy analysis. The engine tests were performed at different loads and using various fuel samples on the RCCI engine then results were analyzed by using machine learning (ML)‐based (random forest [RF] and support vector machine) algorithms for prediction and optimization of engine parameters. The CMBD + But + 8 LPM HG fuel achieved the highest Brake thermal efficiency of 33.2% which is 2.5% and 11.4% higher than diesel and CMBD fuel, while Brake specific energy consumption (BSEC) decreased by 26.5% and 37.5% accordingly. The addition of hydrogen gas and oxygenated fuel enhances the premixed combustion, resulting in faster heat release, higher peak cylinder pressure and improved overall combustion efficiency. The reduced CO (0.30% Vol), HC (52 ppm) along with smoke (46.6 HSU) compared to diesel due to the improved combustion, whereas NOx emissions increases to 1280 ppm owing to higher in‐cylinder temperature for the CMBD + But + 8 LPM HG fuel. Among the ML models, SVM model predicted Brake thermal efficiency with higher accuracy ( R 2 of 0.9975) while RF model shows superior prediction for BSEC and NOx ( R 2 = 0.9879 and 0.9896). Overall, the study demonstrates that hydrogen‐assisted oxygenated (n‐butanol) fuel blends significantly enhances the engine performance and provides an effective pathway for ML‐based optimization for RCCI engines.
Exploring the potential of nano-enhanced lemongrass biodiesel blends with hydrogen premixing for improved CI engine behaviour Krupakaran Radhakrishnan Lawrence, Praveen Anchupogu, Ratna Kamala Petla, Dhinesh Balasubramanian, Utku Kale, et al. Scientific Reports, 2025 Using fossil fuels in compression ignition (CI) engines is still a challenge today due to concerns over environmental pollution and the long-term sustainability of fuel sources. Addressing these difficulties necessitates the development of alternate fuel methods that can boost engine performance while simultaneously lowering emissions. The current study focusses on employing a 20% blend of lemongrass (Cymbopogon Citratus) biodiesel and diesel supplemented with MWCNTs at 40 ppm (also known as “nano fuel of Lemongrass oil”) and investigating the usage of this mixture in an unmodified CI engine. To improve the performance of the nano-fuel, 5LPM hydrogen was premixed through intake manifold. This led to significantly better combustion, thanks to improved mixing inside the cylinder and quicker flame spread. Notably, adding 5 LPM hydrogen to the nano additive biodiesel made from lemongrass biodiesel resulted in a 12.6% boost in brake thermal efficiency. When compared to the LG20 blend operation, these studies revealed a 15.34% reduction in brake-specific fuel consumption (BSFC), a 19.6% decrease in carbon monoxide (CO) pollutants, a 5.35% decrease in unburned hydrocarbon (UHC) pollutants, and an 8.33% reduction in smoke opacity. As a result, we propose further research into hydrogen premixing in conjunction with nano-enhanced Lemongrass biodiesel to increase CI engine performance. It has been noticed that LG20 + MC + H2 fuel increases BTE by 12.6% and reduces BSFC by 15.33% when compared to LG20 fuel. These findings demonstrate the synergistic effect of hydrogen premixing and nanoparticle-enriched biodiesel in increasing CI engine performance and lowering emissions, indicating a possible path towards cleaner and more efficient engine operation.
Enhancing Solar Still Productivity with Aluminium Oxide Nanoparticles and Phase Change Materials Krupakaran R L, Gnana Sagaya Raj, Ratna Kamala Petla, Lakshmi K Kala, Praveen Anchupogu SAE Technical Papers, 2025 <div class="section abstract"><div class="htmlview paragraph">The present study is focused on the integration of phase change materials (PCMs) and Al<sub>2</sub>O<sub>3</sub> nanoparticles into solar stills presents a promising approach to enhance their efficiency. This paper explores the design and performance analysis of a solar still system incorporating PCMs and Al<sub>2</sub>O<sub>3</sub> nanoparticles with different concentration like 200ppm and 400ppm. The primary goal is to investigate the impact of these enhancements on the solar still’s productivity and thermal efficiency.The Aluminium Oxide Nanoparticle were synthesized by chemical co-precipitation method. XRD and TEM were used to characterize the aluminum oxide particles. In this study, Aluminum oxide nanoparticles were employed as thermal conductivity materials, while TN+30 were utilized as a phase change material. After taking about 25 (liters) of water, it was discovered that 1 cm was the ideal depth. Compared to PCM, the energy materials TN+30 and Al<sub>2</sub>O<sub>3</sub> increased collection efficiency with 200 ppm and 400 ppm of 21.65% and 32.97%, respectively.</div></div>
Enhancing Flow and Heat Transfer Characteristics in Microchannels with Various Nanofluids Krupakaran R L, Ratna Kamala Petla, Praveen Anchupogu, Lakshmi K Kala, Vidyasagar Reddy Gangula, et al. SAE Technical Papers, 2025 <div class="section abstract"><div class="htmlview paragraph">The substantial growth of power converters in electric vehicles necessitates more energy consumption and, as a result, greater heat generation. To avoid the power converter’s excessive heat, an innovative curved microchannel with diamond-shaped and pentagonal cross-sections was developed. The flow and heat transfer characteristics of the Gc<sub>3</sub>N<sub>4</sub>/Water (0.3%), Al<sub>2</sub>O<sub>3</sub>/Water (0.3%), and Al<sub>2</sub>O<sub>3</sub>-Gc<sub>3</sub>N<sub>4</sub>/Water (0.3%) hybrid nanofluid were assessed. The experimental investigation was carried out by different mass flow rates of about 0.1 to 0.5 LPM under a uniform heat flux of 50 kW/m<sup>2</sup>. The heat sink had a cross-sectional area of 80×48mm<sup>2</sup>. In comparison to the diamond channel heat sink through hybrid nanofluids, findings from experiments resulted that the heat transfer rate and pressure drop for the diamond channel enhanced by 14.2% and 18.9%, respectively. In comparison to Gc<sub>3</sub>N<sub>4</sub>/Water and Al<sub>2</sub>O<sub>3</sub>/Water nanofluids, the hybrid nanofluid improved the heat transfer rate for the diamond micro channel heat sink (MCHS) by 4.9% and 5.8%, respectively. Finally the hybrid MCHS with hybrid no fluid revealed better performance.</div></div>
Investigation on the Engine Parameters of a DI Diesel Engine using Diesel and Canola Biodiesel-blended Fuel with 1-4 Dioxane Additive Anchupogu Praveen, V. V. Kondaiah, Tapan K. Mahanta, Ravikumar Dumpala, B. Ratna Sunil Journal of Mines Metals and Fuels, 2023 The present work investigates the effect of 1-4 dioxane (10 ml) as additive to the diesel and blend of canola biodiesel (CABD20) on the performance of a diesel engine. The physiochemical properties of diesel, CABD20, diesel+1-4 dioxane and CABD20+1-4 dioxane fuels were measured and improved fuel properties were identified with the additive based fuels. From the experimental results, BTE was enhanced (by 1.9-2.2%) with additive based fuel over both the diesel and CABD20 fuels. The presence of HA, CO and smoke emissions were decreased in the exhaust emissions for CABD20 fuel with a marginal increment of NOx emissions. Furthermore, adding 1-4 dioxane to diesel and CABD20 fuel significantly reduced the exhaust emissions. From the observations, it is concluded that better engine performance can be obtained with the use of additives in the diesel and the blend of biodiesel.
Experimental Investigations on NOx Reduction Using Antioxidant Additives in Conjunction with SCR in a Diesel Engine Powered by Ricinus Communis Biodiesel R L Krupakaran, Ratna Kamala Petla, Praveen Anchupogu, Vidyasagar Reddy Gangula, Jamuna Rani Ganipineni, et al. SAE Technical Papers, 2023 <div class="section abstract"><div class="htmlview paragraph">The current study has concentrated on discovering and developing clean alternative energy sources like biodiesel and employing novel methods to reduce harmful emissions and enhance engine performance behavior. The consumption of biodiesel in diesel engines reduces the emissions from the tailpipe, but some researchers claim that it actually produces more NOx pollution than engines that run on regular diesel, which limits the use of biodiesel. In this study, Ricinus communis biodiesel was generated through transesterification process, and its fuel properties were assessed. The employ of biodiesel in diesel engines minimize exhaust emissions; however, multiple investigators claim that the consumption of biodiesel generates greater amounts of nitrogen oxide pollutants than diesel-fueled engines, which limits the possibility of biodiesel usage. In the present investigation, the combined influence of an antioxidant (tert-butyl hydroquinone (TBHQ)) additive introduced to the fuel alteration method and SCR (selective catalytic reduction) as an after-treatment approach on NOx diminution in a Ricinus communis biodiesel -fuelled CI engine was investigated.The antioxidant stabilizer together with the SCR approach substantially decreases the pollutant of NOx by 86%, with a small rise in HC and CO pollutant caused by the addition of antioxidant as additives to Ricinus communis biodiesel and aqueous urea solution introduced at the tailpipe gasses without a significant drop in BTE and BSFC.</div></div>
Enhanced Solar Desalination Using Natural Dolomite-Integrated PCM and MWCN Thermal Storage: An Experimental Study K RL, R Petla, P Anchupogu, U P, R Satya Meher, V Dunna Advances in Design, Materials, Manufacturing, and Surface Engineering (ADMMS … , 2026 2026
Experimental and machine learning‐based investigation on the engine parameters of the reactivity controlled compression ignition engine fueled with microalgae biodiesel blends … A Praveen, RL Krupakaran, S Narasimha Kumar, K Paleti, S Jayavelu, ... Environmental Progress & Sustainable Energy, e70515 , 2026 2026
Sustainable Borassus Biomass Derived Catalyst for Biodiesel Production: An Integrated Optimization and Prediction Approach Using RSM and Machine Learning A Praveen, MV Teja, M Katamaneni, VT Chand, P Chengareddy, ... BioEnergy Research 18 (1), 118 , 2025 2025 Citations: 3
Exploring the potential of nano-enhanced lemongrass biodiesel blends with hydrogen premixing for improved CI engine behaviour KR Lawrence, P Anchupogu, RK Petla, D Balasubramanian, U Kale, ... Scientific Reports 15 (1), 37942 , 2025 2025 Citations: 3
Enhancing Solar Still Productivity with Aluminium Oxide Nanoparticles and Phase Change Materials K RL, G Sagaya Raj, RK Petla, LK Kala, P Anchupogu Advances in Design, Materials, Manufacturing and Surface Engineering for … , 2025 2025 Citations: 3
Enhancing Flow and Heat Transfer Characteristics in Microchannels with Various Nanofluids K RL, RK Petla, P Anchupogu, LK Kala, VR Gangula, H Tarigonda Advances in Design, Materials, Manufacturing and Surface Engineering for … , 2025 2025
Optimization of biodiesel yield and performance investigations on diesel engine powered with hydrogen and acetylene gas injected with enriched Jojoba biodiesel blend KR Lawrence, P Anchupogu, MR Reddygari, VR Gangula, ... International Journal of Hydrogen Energy 50, 502-523 , 2024 2024 Citations: 39
Investigation on the Engine Parameters of a DI Diesel Engine using Diesel and Canola Biodiesel-blended Fuel with 1-4 Dioxane Additive RDBRS Anchupogu Praveen , V. V. Kondaiah, Tapan K. Mahanta Journal of Mines, Metals and Fuels 71 (12), 2831-2836 , 2024 2024 Citations: 1
Combined effect of hydrogen and with Julifora biodiesel blend (JFB20) on the combustion, performance and emission characteristics of a direct-injection diesel engine P Anchupogu, RL Krupakaran, S Venkateswarlu, S Satish, ... Materials Today: Proceedings 102, 236-240 , 2024 2024 Citations: 10
The influence of thermal barrier coating (TBC) on diesel engine performance powered by using Mimusops elengi methyl ester with TiO 2 nanoadditive RL Krupakaran, VR Gangula, H Tarigonda, B Sachuthananthan, ... International Journal of Ambient Energy 44 (1), 2250-2261 , 2023 2023 Citations: 9
Experimental Investigations on NOx Reduction Using Antioxidant Additives in Conjunction with SCR in a Diesel Engine Powered by Ricinus Communis Biodiesel RL Krupakaran, RK Petla, P Anchupogu, VR Gangula, JR Ganipineni, ... International Conference on Advances in Design, Materials, Manufacturing and … , 2023 2023
Performance Emission Parameters Behavior of a DI Diesel Engine Using Al 2 O 3 and TiO 2 Nano Additive Biodiesel Blends P Anchupogu, RL Krupakaran, JR Ganipineni, RK Petla International Conference on Advances in Design, Materials, Manufacturing and … , 2023 2023 Citations: 1
Optimization of Operational Parameters on Engine Performance and Emissions of a Diesel Engine Powered with Mimusops Elengi Methyl Ester with Doped TiO2 Nanoparticle with … KL Anchupogu Praveen, R L Krupakaran, Vidyasagar Reddy Gangula, Hariprasad ... SAE International , 2023 2023
Influence of nanoadditive Chlorella vulgaris microalgae biodiesel blends on the performance and emission characteristics of a DI diesel engine A Praveen, V Lakshmi Narayana, K Ramanaiah International Journal of Ambient Energy 43 (1), 2071-2077 , 2022 2022 Citations: 22
A Comparison of Coated and Uncoated Diesel Engine Performance and Emission Characteristics Powered by Chlorella Vulgaris Biodiesel Blend with an Assistance of Alumina Nano Additive RKP Raghurami Reddy Doddipalli, R L krupakaran, Vidyasagar reddy Gangula ... SAE International , 2022 2022 Citations: 7
Dispersion effect of Al2O3 nanoparticles in diesel and hemp biodiesel blend on the engine parameters of a diesel engine MKE Anchupogu Praveen, V. V. Kondaiah, Ravikumar Dumpala, B. Ratna Sunil, R ... AIP Conference Proceedings 2648 (040007), 1-7 , 2022 2022 Citations: 4
Comparative assessment of MWCNTs and alumina nanoparticles dispersion in biodiesel blend on the engine characteristics of an unmodified DI diesel engine RL Krupakaran, GJ Rani, P Anchupogu, GV Reddy, DR Reddy, RK Petla Materials Today: Proceedings 68, 1241-1251 , 2022 2022 Citations: 25
Effect of MWCNTs as nano additives in C. Inophyllum biodiesel blend (CIB20) on the performance and emission parameters of a diesel engine BB Anchupogu Praveen, G. Jamuna Rani Materials Today: Proceedings 50 (6), 2581-2586 , 2021 2021 Citations: 15
Enhancing diesel engine performance by using nano-dispersing agents in fuel: A review BRS Manoj Kumar Elipey, Gopisetty Ravi Chandra, P. Sneha Latha, Anchupogu ... IOP Conference Series: Materials Science and Engineering, 012039 , 2021 2021
An Assessment of the TiO2 nanoparticle concentration in the C. Inophyllum biodiesel blend on the engine characteristics of a DI diesel engine BB Anchupogu Praveen, R. L. Krupakaran, G. Lakshmi Narayana Rao International Journal of Ambient Energy , 2021 2021 Citations: 29
MOST CITED SCHOLAR PUBLICATIONS
Performance and emission characteristics of a diesel engine using Calophyllum inophyllum biodiesel blends with TiO2 nanoadditives and EGR A Praveen, GLN Rao, B Balakrishna Egyptian journal of petroleum 27 (4), 731-738 , 2018 2018 Citations: 171
Effect of alumina nano additives into biodiesel-diesel blends on the combustion performance and emission characteristics of a diesel engine with exhaust gas recirculation P Anchupogu, LN Rao, B Banavathu Environmental Science and Pollution Research 25 (23), 23294-23306 , 2018 2018 Citations: 91
Optimization of biodiesel yield and performance investigations on diesel engine powered with hydrogen and acetylene gas injected with enriched Jojoba biodiesel blend KR Lawrence, P Anchupogu, MR Reddygari, VR Gangula, ... International Journal of Hydrogen Energy 50, 502-523 , 2024 2024 Citations: 39
The combined effect of multiwalled carbon nanotubes and exhaust gas recirculation on the performance and emission characteristics of a diesel engine A Praveen, GLN Rao, B Balakrishna International Journal of Ambient Energy 40 (8), 791-799 , 2018 2018 Citations: 30
An Assessment of the TiO2 nanoparticle concentration in the C. Inophyllum biodiesel blend on the engine characteristics of a DI diesel engine BB Anchupogu Praveen, R. L. Krupakaran, G. Lakshmi Narayana Rao International Journal of Ambient Energy , 2021 2021 Citations: 29
Comparative assessment of MWCNTs and alumina nanoparticles dispersion in biodiesel blend on the engine characteristics of an unmodified DI diesel engine RL Krupakaran, GJ Rani, P Anchupogu, GV Reddy, DR Reddy, RK Petla Materials Today: Proceedings 68, 1241-1251 , 2022 2022 Citations: 25
Influence of nanoadditive Chlorella vulgaris microalgae biodiesel blends on the performance and emission characteristics of a DI diesel engine A Praveen, V Lakshmi Narayana, K Ramanaiah International Journal of Ambient Energy 43 (1), 2071-2077 , 2022 2022 Citations: 22
Effect of MWCNTs as nano additives in C. Inophyllum biodiesel blend (CIB20) on the performance and emission parameters of a diesel engine BB Anchupogu Praveen, G. Jamuna Rani Materials Today: Proceedings 50 (6), 2581-2586 , 2021 2021 Citations: 15
Comparative analysis of the performance and emission characteristics of a diesel engine by using canola and sesame biodiesel-diesel blends A Praveen, GLN Rao, B Balakrishna, KS Rao AIP Conference Proceedings 2161 (1), 020029 , 2019 2019 Citations: 11
Combined effect of hydrogen and with Julifora biodiesel blend (JFB20) on the combustion, performance and emission characteristics of a direct-injection diesel engine P Anchupogu, RL Krupakaran, S Venkateswarlu, S Satish, ... Materials Today: Proceedings 102, 236-240 , 2024 2024 Citations: 10
The influence of thermal barrier coating (TBC) on diesel engine performance powered by using Mimusops elengi methyl ester with TiO 2 nanoadditive RL Krupakaran, VR Gangula, H Tarigonda, B Sachuthananthan, ... International Journal of Ambient Energy 44 (1), 2250-2261 , 2023 2023 Citations: 9
Nano fluids effect on crossflow heat exchanger characteristics – Review AP G. Jamuna Rani, G. Sai Rani Materials Today: Proceedings , 2020 2020 Citations: 9
A Comparison of Coated and Uncoated Diesel Engine Performance and Emission Characteristics Powered by Chlorella Vulgaris Biodiesel Blend with an Assistance of Alumina Nano Additive RKP Raghurami Reddy Doddipalli, R L krupakaran, Vidyasagar reddy Gangula ... SAE International , 2022 2022 Citations: 7
Effect of TiO2 nanoadditives on the combustion performance and emission characteristics of a DI diesel engine P Anchupogu, G Rao, B Balakrishna, BR Sankar, P Umamaheswarrao Advanced Science Letters 24 (8), 5712-5717 , 2018 2018 Citations: 6
Dispersion effect of Al2O3 nanoparticles in diesel and hemp biodiesel blend on the engine parameters of a diesel engine MKE Anchupogu Praveen, V. V. Kondaiah, Ravikumar Dumpala, B. Ratna Sunil, R ... AIP Conference Proceedings 2648 (040007), 1-7 , 2022 2022 Citations: 4
Analysis on heat transfer in Nanofluids for alumina-water Praveen, Anchupogu, penugonda Suresh babu, Venkata Ramesh Manila International journal of advanced scientific research and technology 2 (2), 134 , 2012 2012 Citations: 4
Sustainable Borassus Biomass Derived Catalyst for Biodiesel Production: An Integrated Optimization and Prediction Approach Using RSM and Machine Learning A Praveen, MV Teja, M Katamaneni, VT Chand, P Chengareddy, ... BioEnergy Research 18 (1), 118 , 2025 2025 Citations: 3
Exploring the potential of nano-enhanced lemongrass biodiesel blends with hydrogen premixing for improved CI engine behaviour KR Lawrence, P Anchupogu, RK Petla, D Balasubramanian, U Kale, ... Scientific Reports 15 (1), 37942 , 2025 2025 Citations: 3
Enhancing Solar Still Productivity with Aluminium Oxide Nanoparticles and Phase Change Materials K RL, G Sagaya Raj, RK Petla, LK Kala, P Anchupogu Advances in Design, Materials, Manufacturing and Surface Engineering for … , 2025 2025 Citations: 3
Investigation on the Engine Parameters of a DI Diesel Engine using Diesel and Canola Biodiesel-blended Fuel with 1-4 Dioxane Additive RDBRS Anchupogu Praveen , V. V. Kondaiah, Tapan K. Mahanta Journal of Mines, Metals and Fuels 71 (12), 2831-2836 , 2024 2024 Citations: 1