The development of a novel apparatus to measure the emissivity of high-roughness materials at 82 K Avijit Dewasi, Ranjana Gangradey, Samiran Shanti Mukherjee, Vishal Gupta, Rohan Dutta, Abhinav B Desai, Jyoti S Mishra, Paresh Panchal, Pratik A Nayak, Hemang S Agravat Measurement Science and Technology, 2023 The emissivity of a material changes with temperature. The knowledge of emissivity plays an important role in the estimation of radiation heat load in cryogenic systems. As the emissivity values of different materials at cryogenic temperatures are scarcely available in the literature, room-temperature emissivity values have been extensively used to estimate the radiation heat load in cryogenic systems. This may lead to a significant deviation between the predicted and actual radiation properties at cryogenic temperatures. Therefore, in the present work, an apparatus is developed based on a calorimetric technique for measuring the emissivity of an opaque material around 82 K. The novelties of the apparatus are its compact size, ease of sample handling, shorter time required to reach thermal equilibrium and, most importantly, capacity to measure the emissivity of a sample of high roughness. To understand the effectiveness of low and high emissivity-coated heat radiators for the system, a theoretical and an experimental approach has been followed. It is found that the high-emissivity heat radiator leads to a significant reduction in the time required to reach thermal equilibrium compared to a low-emissivity heat radiator. To verify and validate this setup, the emissivities of Aeroglaze Z306 (high emissivity) and Cu (low emissivity) are measured and compared with the values reported in the literature. Finally, this work has been extended to measure emissivity at cryogenic temperature for the first time for PU1, SG121FD and indigenously developed novel materials, such as black paints, adhesive and activated charcoals of different granule sizes.
Thermal storage materials for low-temperature refrigeration in cryogenic energy storage systems R Dutta Advancing Thermal Technologies, 493-510 , 2026 2026
Effect of ancillary component optimization on flow behaviour in GM type U-tube pulse tube cryocoolers AB Desai, R Dutta, H Agravat, A Dewasi, S Mukherjee, V Gupta, ... Sādhanā 50 (3), 177 , 2025 2025
Air purifier R Gupta, R Dutta IN Patent IN-GJ1,682,640,815,705 X , 2025 2025
Air cooling system Mansi, R Dutta IN Patent IN-GJ16,871,251,062,382 X , 2025 2025
Transient Modelling of Thermal Efficiency and Spectral Absorptivity Enhancement in Passive Solar Heating Systems Using Plasmonic Nanostructured Coatings R Dutta International Conference on "Global Climate Action: Strategies for a … , 2025 2025
Development and Demonstration of the Nocturnal Cooling Effect in Dry and Cold/Hot Climatic Regions Mansi, NC Kavuri, S Jani, R Dutta International Conference on Environmental Science and Technology, December … , 2024 2024
Integration of LNG regasification and Cryogenic Energy Storage systems towards addressing cold-loss during regasification, intermittent renewable energy and CCU P Rawat, R Dutta 29th National Conference on Cryogenics and Superconductivity, 26th to 29th … , 2024 2024
Transient heat transfer analysis of low-temperature packed-bed for Cryogenic Energy Storage system D Mohanty, R Dutta 29th National Conference on Cryogenics and Superconductivity, 26th to 29th … , 2024 2024
Experience of pumping the vacuum vessel of SST-1 during the baking cycle with indigenously developed liquid nitrogen cooled sorption pump V Gupta, SS Mukherjee, A Dewasi, JS Mishra, PA Nayak, P Panchal, ... Fusion Engineering and Design 195, 113950 , 2023 2023 Citations: 3
Manifestation of improvement in regenerator performance of a low and high-frequency pulse tube cryocooler using layered pattern AB Desai, R Dutta, SK Verma, A Dewasi, H Agravat, V Gupta, ... Thermal Science and Engineering Progress 45, 102112 , 2023 2023 Citations: 6
The development of a novel apparatus to measure the emissivity of high-roughness materials at 82 K A Dewasi, R Gangradey, SS Mukherjee, V Gupta, R Dutta, AB Desai, ... Measurement Science and Technology 34 (12), 125908 , 2023 2023 Citations: 7
A review on design, operation and applications of cold-compressors in large-scale helium liquefier/refrigerator systems AA Sam, R Dutta, D Abraham, P Ghosh, A Pesyridis Cryogenics 132, 103700 , 2023 2023 Citations: 3
A biomimicry propulsion apparatus for water vehicles and method thereof M Chitale, R Dutta IN Patent App. 202,321,020,901 , 2023 2023
Design and development of LN2 cooled cryopump for application in high heat flux test facility SS Mukherjee, V Gupta, P Panchal, JS Mishra, P Nayak, J Agarwal, ... Fusion Engineering and Design 184, 113315 , 2022 2022 Citations: 5
Design of helium compressors used in fusion devices for mitigation of pulsed heat load A Suresh, AA Sam, R Dutta, P Ghosh Proceedings of the 28th national symposium on cryogenics and … , 2022 2022
Development of prototype pulse-tube refrigerator for typical cryopumps used in fusion devices R Dutta, A Desai, V Gupta, S Mukherjee, JS Mishra, H Agravat, P Panchal, ... Proceedings of the 28th national symposium on cryogenics and … , 2022 2022
Process and method of self sub-cooling liquid nitrogen using cryo-sorption H Pandey, R Dutta, S Mukherjee, V Gupta, H Agravat, P Panchal, P Nayak, ... Proceedings of the 28th national symposium on cryogenics and … , 2022 2022
Performance testing of the liquid nitrogen cooled sorption cryopump for application in SST-1 Tokamak V Gupta, R Gangradey, SS Mukherjee, JS Mishra, PA Nayak, P Panchal, ... Fusion Engineering and Design 181, 113212 , 2022 2022 Citations: 6
Optimization of Layer Pattern of Regenerator for a Low-frequency Pulse tube Cryocooler AB Desai, R Dutta, HS Agravat, V Gupta, SK Verma, A Dewasi, ... 2022
A compact apparatus for measurement of total hemispherical emissivity of opaque materials down to cryogenic temperature PN Avijit Dewasi, Ranjana Gangradey, Samiran Mukherjee, Vishal Gupta, Rohan ... IN Patent App. 202221054936 A , 2022 2022
MOST CITED SCHOLAR PUBLICATIONS
Selection and design of post-combustion CO 2 capture process for 600 MW natural gas fueled thermal power plant based on operability R Dutta, LO Nord, O Bolland Energy 121, 643-656 , 2017 2017 Citations: 55
Estimation of Waste-heat and its Recovery Potential from Energy Intensive Industries B Saha, B Chakraborty, R Dutta Clean Technologies and Environmental Policy 22, 1795–1814 , 2020 2020 Citations: 50
Customization and validation of a commercial process simulator for dynamic simulation of Helium liquefier R Dutta, P Ghosh, K Chowdhury Energy 36 (5), 3204-3214 , 2011 2011 Citations: 49
Prospects of using equilibrium-based column models in dynamic process simulation of post-combustion CO2 capture for coal-fired power plant R Dutta, LO Nord, O Bolland Fuel 202, 85-97 , 2017 2017 Citations: 32
Applicability of equations of state for modeling helium systems RJ Thomas, R Dutta, P Ghosh, K Chowdhury Cryogenics 52 (7-9), 375-381 , 2012 2012 Citations: 28
Process Configuration of Liquid-nitrogen Energy Storage System (LESS) for Maximum Turnaround Efficiency R Dutta, P Ghosh, K Chowdhury Cryogenics, DOI: 10.1016/j.cryogenics.2017.10.003 , 2017 2017 Citations: 23
Application of parallel heat exchangers in helium refrigerators for mitigating effects of pulsed load from fusion devices R Dutta, P Ghosh, K Chowdhury Fusion Engineering and Design 86 (4-5), 296-306 , 2011 2011 Citations: 20
Dynamic process model development and validation with transient plant data collected from an MEA test campaign at the CO2 Technology Center Mongstad RM Montañésa, NE Flø, R Dutta, LO Nord, O Bolland 13th International Conference on Greenhouse Gas Control Technologies, GHGT … , 2017 2017 Citations: 16
Experimental Investigations on the Cold Recovery-Efficiency of a Packed-bed in a Cryogenic Energy Storage System R Dutta, P Sandilya IOP Conference Series: Materials Science and Engineering, CEC-ICMC 2019 … , 2020 2020 Citations: 15
Mitigation of Effects of Pulsed Heat Loads in Helium Refrigerators for Fusion Devices Using Supercritical Helium Storage R Dutta, P Ghosh, K Chowdhury IEEE Transactions on Applied Superconductivity 22 (6), 4203712 , 2012 2012 Citations: 13
A cycle configuration for large-scale helium refrigerator for fusion devices towards complete mitigation of the effects of pulsed heat load R Dutta, P Ghosh, K Chowdhury Fusion Engineering and Design 88 (11), 2972-2982 , 2013 2013 Citations: 11
Improvement Potential of Cryogenic Energy Storage Systems by Process Modifications and Heat Integration R Dutta, P Sandilya Energy , 2021 2021 Citations: 8
Applicability and validation of use of equilibrium-based absorber models with reduced stage efficiency for dynamic simulation of post-combustion CO2 capture processes R Dutta, LO Nord, O Bolland Energy Procedia 114 (C (2017)), 1424-1433 , 2017 2017 Citations: 8
Mitigation of effects of pulsed heat load from fusion devices on helium refrigerator: A novel technique using vapor compression cycle R Dutta, P Ghosh, K Chowdhury International Journal of Refrigeration 36 (6), 1776-1789 , 2013 2013 Citations: 8
The development of a novel apparatus to measure the emissivity of high-roughness materials at 82 K A Dewasi, R Gangradey, SS Mukherjee, V Gupta, R Dutta, AB Desai, ... Measurement Science and Technology 34 (12), 125908 , 2023 2023 Citations: 7
Manifestation of improvement in regenerator performance of a low and high-frequency pulse tube cryocooler using layered pattern AB Desai, R Dutta, SK Verma, A Dewasi, H Agravat, V Gupta, ... Thermal Science and Engineering Progress 45, 102112 , 2023 2023 Citations: 6
Performance testing of the liquid nitrogen cooled sorption cryopump for application in SST-1 Tokamak V Gupta, R Gangradey, SS Mukherjee, JS Mishra, PA Nayak, P Panchal, ... Fusion Engineering and Design 181, 113212 , 2022 2022 Citations: 6
EXERGETIC ANALYSIS OF REVERSE BRAYTON CRYOCOOLER FOR DIFFERENT COOLING LOADS AT 65 K FOR HTS CABLES AK Dhillon, R Dutta, P Ghosh The 14th CRYOGENICS 2017 IIR International Conference, Dresden, Germany , 2017 2017 Citations: 6
Dynamic simulation of helium liquefiers using Aspen Hysys®: problems, solutions and prospects R Dutta, RJ Thomas, P Ghosh, K Chowdhury National symposium on Cryogenics, 2010, NSC-23, NIT Rourkela, India , 2010 2010 Citations: 6
Design and development of LN2 cooled cryopump for application in high heat flux test facility SS Mukherjee, V Gupta, P Panchal, JS Mishra, P Nayak, J Agarwal, ... Fusion Engineering and Design 184, 113315 , 2022 2022 Citations: 5