Experimental comparison of solar drying based on evacuated tube collector with desiccant drying for dehydrating potato and ginger Shubham Vyas, Prashant Singh, Himanshu Agrawal, Gopal Vishwakarma, Avadhesh Yadav Heat Transfer, 2024 In this article, a comparative study of different drying techniques, namely, open sun drying (OSD), desiccant drying, solar drying (SD), and solar drying with desiccant (SDWD) was done for drying potato and ginger. The thermal efficiency and air temperature differences of the solar dryer based on evacuated tube collectors were also examined. The average efficiency of the solar dryer was 29.01%. Average drying rates of OSD, desiccant drying, SD, and SDWD bed are 0.435, 0.435, 0.59, and 0.635 g/min. The moisture content of the potato was reduced from 79.6% to 32.9% by OSD, 32.6% by desiccant drying, 9.6% by SD, and 6.9% by SDWD. The moisture content of the ginger was reduced from its initial value of 82.3%–25.3% by OSD, 25% by desiccant drying, 10.1% by SD, and 3.2% by SDWD. SD assisted with a desiccant bed proved to be the best method for drying vegetables. Drying with desiccants is not feasible for drying in winter and spring seasons of the Indian climate.
Fabrication of portable solar thermal bank for indoor cooking Uttam Kumar, Himanshu Agrawal, M. Chandrashekara, Avadhesh Yadav Heat Transfer, 2022 The aim of this report is to build a portable solar thermal bank based on a Scheffler reflector that is capable of boiling‐type cooking using HITEC as a thermal storage material. This report reviews the problems related to solar cooking and evaluates the novel layout of a portable solar thermal bank which includes a daily thermal storage vessel. This stove is in the shape of a cylindrical container filled with phase‐changing latent heat storage material. Inside the container, we provide a small gap taking into account the volumetric expansion of the phase change material (PCM) during the melting process. The solar thermal bank is charged in the sun. It is placed directly for a few hours under the focus of a Scheffler reflector, which charges the solar thermal bank with enough thermal energy stored. After a while, the cooking process can be completed by users using that stored heat. The top cavity is used as a cooking pot in a solar thermal bank. Cooking meals do not require direct sunlight, which is typical for most solar cookers. The portable solar thermal bank is an alternative for low‐income households and adapts to local traditions of indoor cooking. It is portable and can be used safely to cook indoors or outdoors. In this study, a solar cooker with a thermal storage device was developed using a PCM. The size of the stove has been calculated by calculating the energy consumption for two to three people. HITEC salt has been chosen as a phase change material for thermal storage, which will be used for cooking when there is no sunlight. It enhances the applicability of solar cooking and preserves cooking possibilities using energy stored throughout the day at low production costs.
THERMAL PERFORMANCE OF AN ACTIVE THERMOSIPHON ICE MELTING SYSTEM BASED ON SCHEFFLER REFLECTOR AT LEH LADAKH REGIONS Himanshu Agrawal, Avadhesh Yadav International Journal of Energy for A Clean Environment, 2022 The thermal output of an active thermosiphon ice chamber was investigated with an objective to melt the ice and generate the hot water, especially for high-altitude regions such as Leh Ladakh, India [geographical coordinates bearing - 34.15° (latitude) North, 77.57° (longitude) East]. A rectangular form vessel is used as a receiver in this experimental system, and it is focused on the solar radiation using a 1 m2 Scheffler reflector. To maximize the absorptiveness of solar energy, coating of graphite is done onto the receiver. The solar heat accessible at the receiver is transmitted by natural circulation (thermosiphon) of the heat transfer fluid into the ice chamber. At the campus of NIT Kurukshetra, India, there are four separate ice-chamber prototypes installed and being used which are exposed to the atmospheric conditions for investigations. The findings of the built setup were obtained where it was found that the frozen ice at -4°C was fully melted and converted to water and that the average water temperature was 47.2°C, 53.5°C, 66°C, and 24.2°C, respectively, in the semi-cylindrical type, rectangular form, horizontal cylindrical form, and vertical cylindrical-type ice chambers.
Indian RTI Act-2005 Analysis by Machine Learning: A Bastar Zone Perspective Nitesh Kumar Sharma, Lukesh Kumar Sahu, M. R. Khan, G. P. Khare, Prabhakar Mishra, Himanshu Agrawal 2022 13th International Conference on Computing Communication and Networking Technologies Icccnt 2022, 2022 Indian residents now have an opportunity to obtain information that is kept in government offices thanks to the Right to Information (RTI) Act of 2005. The RTI query-log data, which records citizen interactions with the government, is available in every government office. The goal of this work is to analyses the RTI query-log data in order to find fundamental latent patterns, with the hope that these patterns may provide insight into prospective legislative changes. We gather RTI queries and reply-statistics from government educational institutions all throughout India for the first time. Three latent patterns are quantified: I the organizations' transparency as determined by RTI queries stats; (ii) the influences on organizations’ accessibility; and (iii) the success of the RTI law's execution. There is a suggestion for this double institute-query-category matrix representation of the RTI data. By employing an Evaluated Response Model to estimate the data matrix's maximum probability, the aforementioned three latent parameters are simultaneously measured. We find contradictions in the RTI legislation's application through the latent patterns that were identified, while also providing recommendations for possible RTI act reform.
Economic analysis of solar thermal system for melting of ice at high altitude regions using Scheffler solar concentrator Himanshu Agrawal, Avadhesh Yadav International Journal of Sustainable Engineering, 2021 The present paper deals with the economic investigation of hot water generation from melting of ice through Scheffler solar concentrator at high altitude regions like Leh Ladakh in India. For determination of the cost incurred per litre in terms of the Indian Currency, several factors have been studied and evaluated. In all three examined cases, for every respective case, the undeviating technique is adopted. The experimentation is performed in the atmospheric conditions of National Institute of Technology, Kurukshetra, Haryana, India. Exclusive economics of yearly cost per litre is achieved for the generation of hot water from ice at high altitudes by making use of direct heating process.
Thermal performance of the steam boiler based on Scheffler solar concentrator for domestic application: Experimental investigation Vikrant Kamboj, Himanshu Agrawal, Anish Malan, Avadhesh Yadav Australian Journal of Mechanical Engineering, 2021 In this paper, a working setup of Scheffler solar concentrator (SSC) for the steam generation application has been investigated experimentally. An experimental setup of SSC having an aperture area of 1.54 m2 and steam boiler (or receiver) area of 0.0324 m2 was set up and tested for steam generation. The steam boiler 1, 2 and 3 with different arrangements were used for steam generation. During sunshine hours, the steam boiler 1, 2 and 3 are placed at the focus of SSC at 11:00 hour up to 2.1 bar (gauge) reached. The dryness fraction of the steam boiler 1, 2 and 3 have been calculated as 43.51%, 71.61%, 96.32% and the thermal efficiency 18.40%, 14.53% and 14.09%, respectively. In all the steam boiler arrangements, it has been found that in the steam boiler 3 produced a high quality of steam.
Experimental investigation of ice-chamber for melting of ice based on Scheffler solar concentrator for high altitude regions Himanshu Agrawal, Avadhesh Yadav Heat Transfer, 2020 This experimental analysis was performed with the aim to melt the ice into hot water at very high altitude regions such as Leh Ladakh. Three different designs of ice‐chamber were used to melt the ice with direct heating in minimum time. The radiations were focused on the receiver with the help of 1 m2 Scheffler solar concentrator exposed to the atmospheric situations of NIT Kurukshetra. The Scheffler solar concentrator was fabricated with fiber‐reinforced plastic material. The fabrication process is discussed in detail. The results obtained from the design showed that the ice frozen at −5°C completely melted, converting into water. The maximum temperature of water attained in the ice‐chamber with receiver 1 (circular plate with fins), 2 (CPC with fins), and 3 (copper crucible) was 57.7°C, 64.3°C, and 67.4°C, respectively.
Thermal analysis of cubic receiver for different materials using ANSYS Himanshu Agrawal, Avadhesh Yadav Aip Conference Proceedings, 2020 For any Solar Thermal System, to draw the heat radiation from the sun, a receiver plays the vital role. This is all done due to the process of conduction that takes place from the energy received from sun. Thermal conductivity of any material is primarily responsible for the transfer of the heat through it. Therefore, this paper presented before clearly examines the thermal performance of the receiver used using various materials. This is all done by making use of the ANSYS software, where the results obtained from various tests are analyzed and the best suited material is stretched out that gives the excellent heat transfer rate. Further the checked and analyzed receiver is implemented to use it for practical purpose like heating the water and cooking.
Experimental comparison of solar drying based on evacuated tube collector with desiccant drying for dehydrating potato and ginger S Vyas, P Singh, H Agrawal, G Vishwakarma, A Yadav Heat Transfer 53 (4), 2128-2147 , 2024 2024.0 Citations: 5
Thermal performance of cubical receiver with trapezoidal ice-pot for melting of ice at high altitude regions based on Scheffler solar concentrator H Agrawal, A Yadav International Journal of Ambient Energy 43 (1), 2950-2962 , 2022 2022.0 Citations: 3
Fabrication of portable solar thermal bank for indoor cooking U Kumar, H Agrawal, M Chandrashekara, A Yadav Heat Transfer 51 (5), 3815-3829 , 2022 2022.0 Citations: 6
Thermal performance of an active thermosiphon ice melting system based on Scheffler reflector at Leh Ladakh regions H Agrawal, A Yadav International Journal of Energy for a Clean Environment 23 (3) , 2022 2022.0 Citations: 3
Thermal performance of the steam boiler based on Scheffler solar concentrator for domestic application: experimental investigation V Kamboj, H Agrawal, A Malan, A Yadav Australian Journal of Mechanical Engineering 19 (5), 521-531 , 2021 2021.0 Citations: 18
Economic analysis of solar thermal system for melting of ice at high altitude regions using Scheffler solar concentrator H Agrawal, A Yadav International Journal of Sustainable Engineering 14 (3), 497-506 , 2021 2021.0 Citations: 6
A Scheffler solar concentrator heat transfer model used in forced-circulation ice melting system at high-altitude regions: H. Agrawal, A. Yadav H Agrawal, A Yadav Environment, Development and Sustainability 23 (2), 1623-1645 , 2021 2021.0 Citations: 11
Thermal analysis of cubic receiver for different materials using ANSYS H Agrawal, A Yadav AIP Conference Proceedings 2220 (1), 020062 , 2020 2020.0 Citations: 1
Experimental investigation of ice‐chamber for melting of ice based on Scheffler solar concentrator for high altitude regions H Agrawal, A Yadav Heat Transfer , 2020 2020.0 Citations: 8
Thermal Performance Evaluation of Dual Sensible Heat Storage Unit in a Solar Cooker for Late Evening Cooking H Agrawal National Institute of Technology, Kurukshetra , 2018 2018.0
Thermal performance evaluation of solar cooker with latent and sensible heat storage unit for evening cooking V Yadav, Y Kumar, H Agrawal, A Yadav Australian journal of mechanical engineering 15 (2), 93-102 , 2017 2017.0 Citations: 54
Thermal analysis of a solar cooker with sensible heat storage unit H Agrawal, A Yadav Journal of Material Science and Mechanical Engineering 2 (6), 9-12 , 2015 2015.0 Citations: 4
Design and experimental testing of solar cooker with sensible heat storage H Agrawal, A Yadav Journal of Energy Research Environmental Technology 2 (3), 200-204 , 2015 2015.0 Citations: 10
Comparison of experimental data for sensible and latent heat storage materials for late-evening cooking based on a dish-type solar cooker H Agrawal, V Yadav, Y Kumar, A Yadav International Journal of Energy for a Clean Environment 15 (1) , 2014 2014.0 Citations: 17
CATHODIC REDUCTION OF SOME N-HETEROCYCLIC COMPOUNDS AT MERCURY POOL IN TETRAHYDROFURAN-WATER A Singh, N Singhal, H Agrawal, AK Yadav TRANSACTIONS-SOCIETY FOR THE ADVANCEMENT OF ELECTROCHEMICAL SCIENCE AND … , 2000 2000.0 Citations: 1
CATHODIC REDUCTION OF SOME AROMATIC COMPOUNDS IN TETRAHYDROFURAN: WATER AT MERCURY POOL AK Yadav, A Singh, H Agrawal, L Prakash Journal of the Electrochemical Society of India 46 (2), 77-81 , 1997 1997.0
Synthesis of some novel nucleosides of dioxo pyrido [2, 3-d] pyrimidines AK Yadav, H Agrawal, A Singh, L Prakash Indian Journal of Heterocyclic Chemistry 6 (3), 237-238 , 1997 1997.0 Citations: 3
An Experimental comparison of sensible and latent heat storage material for late evening cooking based on dish type solar cooker H Agrawal, V Yadav, Y Kumar, A Yadav
EXPERIMENTAL INVESTIGATION OF SOLAR COOKER WITH TWO SENSIBLE HEAT STORAGE MATERIALS FOR EVENING COOKING H Agrawal, A Yadav
MOST CITED SCHOLAR PUBLICATIONS
Thermal performance evaluation of solar cooker with latent and sensible heat storage unit for evening cooking V Yadav, Y Kumar, H Agrawal, A Yadav Australian journal of mechanical engineering 15 (2), 93-102 , 2017 2017.0 Citations: 54
Thermal performance of the steam boiler based on Scheffler solar concentrator for domestic application: experimental investigation V Kamboj, H Agrawal, A Malan, A Yadav Australian Journal of Mechanical Engineering 19 (5), 521-531 , 2021 2021.0 Citations: 18
Comparison of experimental data for sensible and latent heat storage materials for late-evening cooking based on a dish-type solar cooker H Agrawal, V Yadav, Y Kumar, A Yadav International Journal of Energy for a Clean Environment 15 (1) , 2014 2014.0 Citations: 17
A Scheffler solar concentrator heat transfer model used in forced-circulation ice melting system at high-altitude regions: H. Agrawal, A. Yadav H Agrawal, A Yadav Environment, Development and Sustainability 23 (2), 1623-1645 , 2021 2021.0 Citations: 11
Design and experimental testing of solar cooker with sensible heat storage H Agrawal, A Yadav Journal of Energy Research Environmental Technology 2 (3), 200-204 , 2015 2015.0 Citations: 10
Experimental investigation of ice‐chamber for melting of ice based on Scheffler solar concentrator for high altitude regions H Agrawal, A Yadav Heat Transfer , 2020 2020.0 Citations: 8
Fabrication of portable solar thermal bank for indoor cooking U Kumar, H Agrawal, M Chandrashekara, A Yadav Heat Transfer 51 (5), 3815-3829 , 2022 2022.0 Citations: 6
Economic analysis of solar thermal system for melting of ice at high altitude regions using Scheffler solar concentrator H Agrawal, A Yadav International Journal of Sustainable Engineering 14 (3), 497-506 , 2021 2021.0 Citations: 6
Experimental comparison of solar drying based on evacuated tube collector with desiccant drying for dehydrating potato and ginger S Vyas, P Singh, H Agrawal, G Vishwakarma, A Yadav Heat Transfer 53 (4), 2128-2147 , 2024 2024.0 Citations: 5
Thermal analysis of a solar cooker with sensible heat storage unit H Agrawal, A Yadav Journal of Material Science and Mechanical Engineering 2 (6), 9-12 , 2015 2015.0 Citations: 4
Thermal performance of cubical receiver with trapezoidal ice-pot for melting of ice at high altitude regions based on Scheffler solar concentrator H Agrawal, A Yadav International Journal of Ambient Energy 43 (1), 2950-2962 , 2022 2022.0 Citations: 3
Thermal performance of an active thermosiphon ice melting system based on Scheffler reflector at Leh Ladakh regions H Agrawal, A Yadav International Journal of Energy for a Clean Environment 23 (3) , 2022 2022.0 Citations: 3
Synthesis of some novel nucleosides of dioxo pyrido [2, 3-d] pyrimidines AK Yadav, H Agrawal, A Singh, L Prakash Indian Journal of Heterocyclic Chemistry 6 (3), 237-238 , 1997 1997.0 Citations: 3
Thermal analysis of cubic receiver for different materials using ANSYS H Agrawal, A Yadav AIP Conference Proceedings 2220 (1), 020062 , 2020 2020.0 Citations: 1
CATHODIC REDUCTION OF SOME N-HETEROCYCLIC COMPOUNDS AT MERCURY POOL IN TETRAHYDROFURAN-WATER A Singh, N Singhal, H Agrawal, AK Yadav TRANSACTIONS-SOCIETY FOR THE ADVANCEMENT OF ELECTROCHEMICAL SCIENCE AND … , 2000 2000.0 Citations: 1
Thermal Performance Evaluation of Dual Sensible Heat Storage Unit in a Solar Cooker for Late Evening Cooking H Agrawal National Institute of Technology, Kurukshetra , 2018 2018.0
CATHODIC REDUCTION OF SOME AROMATIC COMPOUNDS IN TETRAHYDROFURAN: WATER AT MERCURY POOL AK Yadav, A Singh, H Agrawal, L Prakash Journal of the Electrochemical Society of India 46 (2), 77-81 , 1997 1997.0
An Experimental comparison of sensible and latent heat storage material for late evening cooking based on dish type solar cooker H Agrawal, V Yadav, Y Kumar, A Yadav
EXPERIMENTAL INVESTIGATION OF SOLAR COOKER WITH TWO SENSIBLE HEAT STORAGE MATERIALS FOR EVENING COOKING H Agrawal, A Yadav
