Dharam Buddhi
@uttaranchaluniversity.ac.in
Vice Chancellor
Uttaranchal University Dehradun India
RESEARCH INTERESTS
Thermal Engineering, Energy Engineering and Science, Energy storage, Materials, Green technologies, Environment, Nanomaterials
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
N.K. Noran, Nasrudin Abd Rahim, Jeyraj Selvaraj, and D. Buddhi
EDP Sciences
Thermal energy storage (TES) using phase change materials (PCMs) has been extensively utilized to improve the efficiency of photovoltaic thermal (PVT) systems. High-conductive nanofillers have been an effective method to improve PCM's energy efficiency and thermal management systems. This research modifies high-capacity paraffin using graphene nanosheets (GNS) in small weight fractions of 0.2% and 0.6%. Tween 60 and gum Arabic are added to improve the GNS nanofiller's suspension ability. A higher GNS nanofiller of 0.6 wt% contributes to lower transmittance with higher solar energy absorption. However, GNS/paraffin with Tween 60 results in better thermal stability than gum Arabic surfactant. The improved thermal properties show promising results for TES systems in PVT applications.
B. Kalidasan, R. Divyabharathi, Subramaniyan Chinnasamy, D. Buddhi, and V.V. Tyagi
EDP Sciences
Energy being the strongly depended source for development and industrialization, their storage in any form tends to bridge the gap between demand and supply. Renewable energy technology systems now include energy storage as a crucial component. Thermal energy storage is a technique that stores thermal energy by heating or cooling a storage medium. This allows the energy to be used for heating and cooling purposes later on. The present study develops ternary inorganic salt hydrate eutectic phase change material (EPCM) that is intended for cooling buildings. Melting temperature, melting enthalpy and eutectic composition proportion of inorganic salt hydrate of sodium carbonate decahydrate (SCD), sodium phosphate dibasic dodecahydrate (SPDD), and sodium sulphate decahydrate (SSD) are determined using the eutectic melting point theory. Ternary EPCM is synthesised experimentally in accordance with the percentage of salt hydrates. Graphene nanoplatelets are distributed at different weight concentrations of 0.3%, 0.6%, and 0.9% in order to further improve the thermal performance; at higher concentration above 0.9% the graphene nanoplatelets tends to agglomerate. In order to assess the chemical stability and thermal properties of prepared nanoparticle dispersed PCMs, are experimentally assessed. Findings confirm the ternary EPCM's chemical stability and raise its latent heat with graphene nanoplatelets.
Sucheta Agarwal, Kuldeep Kumar Saxena, Vivek Agrawal, Jitendra Kumar Dixit, Chander Prakash, Dharam Buddhi, and Kahtan A. Mohammed
Emerald
PurposeManufacturing companies are increasingly using green smart production (GSM) as a tactic to boost productivity since it has a number of advantages over conventional manufacturing methods. It costs a lot of money and takes a lot of work to create an SMS since it combines a lot of different technologies, including automation, data exchanges, cyber-physical systems (CPS), artificial intelligence, the Internet of things (IoT) and semi-autonomous industrial systems. Green smart manufacturing (GSM) activities provide the foundation for creating ecologically friendly and green products. However, there are a number of other significant barriers obstacles to GSM deployment. As a result, removing this identification of these hurdles in a systematic manner should be a top focus of this study.Design/methodology/approach This article seeks to identify and prioritize the nine barriers based on research and expert viewpoints on GSM challenges. The analytical hierarchy process (AHP) is used to prioritize the barriers.FindingsThe result depicts that, financial constraints is the most important barrier that followed by scarcity of dedicated suppliers, concern to data security lack of understanding of the surroundings, inadequate top management commitment, proper handling of data interfaces lack of support by government, employees' lack of training, concern to data security lack of environment knowledge, fear of change/resistance and constraints of technology.Research limitations/implications The current research will help the manufacturing industry in Industry 4.0 to identify potential barriers to GSM implementation.Originality/value Green manufacturing (GM) entails the implementation of renewable production methods and eco-friendly procedures in manufacturing businesses. This study helps manufacturers come up with recycling and creative products, and manufacturers can give back to the environment by protecting natural areas by getting rid of the obstacles that get in the way.
Kalidasan Balasubramanian, Adarsh Kumar Pandey, Yasir Ali Bhutto, Anas Islam, Tareq Kareri, Saidur Rahman, Dharam Buddhi, and Vineet Veer Tyagi
Wiley
Thermal energy storage (TES) assisted with phase change materials (PCM)s seeks greater attention to bridge the gap between energy demand and supply. PCM has its footprint toward efficient storage of solar energy. Inorganic salt hydrate PCMs are propitious over organic PCMs in terms of energy storage ability, thermal conductivity, and fireproof, however the major issue of supercooling and poor optical absorbance remains. This research investigates commercialized inorganic salt hydrate PCM with phase transition temperature of 50 °C, thermal conductivity of 0.593 W m−1 K which is favoured with melting enthalpy of 190 J g−1, and 2–3 °C of supercooling. Mixture of graphene: silver at a proportion of (1:1) is used as the hybrid nanomaterial to further enhance the thermal conductivity, optical absorbance, and thermal stability. Hybrid nanocomposites are developed via two‐step process involving direct mixing and ultrasonication. Morphological behaviour, chemical stability, optical property, thermal property, thermal reliability, and stability of the developed nanocomposite samples are experimentally analysed. As a result, sustainable TES materials with thermal conductivity of 0.937 W m−1 K, optical absorbance of 0.8, increased energy storage potential is formulated. Subsequently a numerical simulation is conducted to illustrate the potential of the developed nanocomposite in transfer of heat energy.
Jeyanthi Subramanian, Vinoth Kumar Selvaraj, Kuldeep K Saxena, Elammaran Jayamani, Rohan Singh, Chander Prakash, and Dharam Buddhi
SAGE Publications
The novelty of this research aims to fabricate effective electromagnetic interference (EMI) shielding materials to prevent electrical components from EMI. In this work, Solidworks was used to design a honeycomb structure with different distances between parallel edges of the structure. All honeycomb structures were manufactured using Creality Ender-3, a 3D printer. The holes of the structure were filled with plasticine/carbon black/aluminum powder. SEM and FTIR tests were used to showcase the presence of nanofillers in the plasticine. The Central Composite design, a response surface methodology method, has been used to design and analyze the EMI shielding effectiveness (EMI SE) experiments. Mathematical models have been developed using the EMI SE results to predict the outcomes and verify them with error estimation. By incorporating the carbon black/aluminum/plasticine composite into the 3D-printed honeycomb structures, the honeycomb structure with a thickness of 6 mm shows a considerably high total EMI SE of 23.8 dB in the 8–12 GHz frequency range. According to the results of an optimization study, 1.5 wt.% of carbon black, 0.5 wt.% of aluminum powder, and a 4-mm distance between parallel edges are the optimal parameters for achieving the highest total EMI SE. Overall, the results show a 3D-printed honeycomb structure filled with nanofillers is a fantastic material employed in various fields, including defense and aviation, where lighter weight and EMI SE properties are critical.
Manisha Priyadarshini, H. M. Vishwanatha, Chandan Kumar Biswas, Piyush Singhal, Dharam Buddhi, and Ajit Behera
Springer Science and Business Media LLC
AbstractTo increase the productivity and quality of the machined components, wire electro-discharge machine parameters such as cutting speed, kerf width, and surface roughness are often optimized. The Wire-electro discharge machining process generates a much higher temperature at the wire-work piece interface which can potentially change the metallurgical characteristics of the machined surface. This paper studies the changes in the tribology of surface and sub-surface of the workpiece due to the initial and optimized wire-electro discharge machine parametric setting using grey relational analysis while machining sub-cooled AISI P20 tool steel. It is concluded that the optimum parametric setting to obtain a better cutting speed, kerf width, and surface roughness using grey relational analysis, which improves the productivity and quality of the component, also produces a thicker recast layer. The wear test revealed that the surface machined with an optimized parametric setting gives higher wear resistance. Detailed scanning electron microscopy explains the characteristics of the recast layer and micro-hardness explains the surface hardenability of tool steel, which is a result of martensitic transformation through rapid cooling, formed heat affected zone, and increase in oxygen content on the surface. The wear test proved that the recast layer helps in improving the wear resistivity of tool steel. The methodology of the hardening of the surface and the sub-surface layer can strengthen the application of components.
Ankita Awasthi, Kuldeep K. Saxena, R. K. Dwivedi, Dharam Buddhi, and Kahtan A. Mohammed
Springer Science and Business Media LLC
Thipparthi Raja gopala chary, Srikar potnuru, R. Jose Immanuel, Kuldeep K. Saxena, Dharam Buddhi, and Ajit Behera
Springer Science and Business Media LLC
Arvinder Singh Channi, Harminder Singh Bains, Jasmaninder Singh Grewal, Raman Kumar, and Dharam Buddhi
Springer Science and Business Media LLC
Abdul Wahab Hashmi, Harlal Singh Mali, Anoj Meena, Kuldeep K. Saxena, Ana Pilar Valerga Puerta, U. Sathish Rao, Dharam Buddhi, and Kahtan A. Mohammed
Springer Science and Business Media LLC
N. J. Rathod, M. K. Chopra, Prem Kumar Chaurasiya, S. H. Pawar, Damodar Tiwari, Rajan Kumar, Kuldeep K. Saxena, and Dharam Buddhi
Springer Science and Business Media LLC
Leqaa A. Mohammed, Abdulwahhab H. Majeed, Omar G. Hammoodi, Chander Prakash, Mustafa A. Alheety, Dharam Buddhi, Safaa A. Dadoosh, and Israa K. Mohammed
Springer Science and Business Media LLC
Md. Absar Alam, Rajan Kumar, Deepen Banoriya, Anil Singh Yadav, Geetesh Goga, Kuldeep K. Saxena, Dharam Buddhi, and Ravindra Mohan
Springer Science and Business Media LLC
M. Thilak, G. Jayaprakash, G. Paulraj, A. Bovas Herbert Bejaxhin, N. Nagaprasad, Dharam Buddhi, Manish Gupta, Leta Tesfaye Jule, and Krishnaraj Ramaswamy
Springer Science and Business Media LLC
Ankita Awasthi, Kuldeep K Saxena, R. K. Dwivedi, Dharam Buddhi, and Kahtan A. Mohammed
Springer Science and Business Media LLC
Abdul Wahab Hashmi, Harlal Singh Mali, Anoj Meena, Kuldeep K. Saxena, Ana Pilar Valerga Puerta, and Dharam Buddhi
Springer Science and Business Media LLC
Manash J. Borah, Sanjib Kr. Rajbongshi, Niharendu Saha, and Dharam Buddhi
Springer Science and Business Media LLC
Gaurav Prashar, Hitesh Vasudev, and Dharam Bhuddhi
Springer Science and Business Media LLC
Himmat Bhatia, Mahendra Joshi, and Dharam Buddhi
AIP Publishing
Mohan Rawat, Digvijay Singh, Sakshi Singh, and Dharam Buddhi
AIP Publishing
Har Mohan Singh, Mriduta Sharma, V.V. Tyagi, Kajol Goria, D. Buddhi, Atul Sharma, Frank Bruno, Shane Sheoran, and Richa Kothari
Elsevier BV
S. Phani Praveen, Mohammed Hasan Ali, Mustafa Musa Jaber, Dharam Buddhi, Chander Prakash, Deevi Radha Rani, and Tamizharasi Thirugnanam
World Scientific Pub Co Pte Ltd
Background: The world is transitioning to Industry 4.0, representing the transition to digital, fully machine-driven environments and cyberphysical systems. Industry 4.0 comprises various technologies and innovations that enable development in multiple perspectives, which are implemented in many different sectors. Problem: The major challenges are the high cost, high rate of failure, security and privacy issues, and there is a need for highly skilled labor for applying healthcare data analysis. Aim: To resolve these issues, we employ the proposed system of Industry 4.0 smart manufacturing for IoT-enabled healthcare data analysis in virtual hospital systems with machine learning (ML) techniques. Methods: The proposed system contains five alternative solutions under smart manufacturing. First, the healthcare data analysis is applied for Weber’s syndrome. That is, this will be used to analyze Weber’s syndrome during its consistent treatment. Second, the IoT-enabled healthcare data handling system works based on edge-assisted edge computing that is used to apply IoT to the healthcare data handling system. The healthcare data analysis in virtual hospital systems uses machine learning for driving data synthesis. Finally, the Industry 4.0 smart manufacturing is applied to the IoT-enabled healthcare data analysis to realize efficient data digitization, especially in smart hospitals with smart sensors for virtual IoT-enabled devices surveillance of Weber’s syndrome. Result: The data digitization based on Industry 4.0 smart manufacturing analysis is considered for data processing, storage and transmission. The proposed system is 62% more efficient than the other analyzed methods. The identification of Weber’s syndrome is 69.8% more efficient than the existing midbrain stroke syndrome identification. The processing and storage of data results are 45.78% more efficient than the current encryption method. Finally, the priority-aware healthcare data analysis based on ML provides 63.4% efficient, faster and more accurate diagnoses in the personalized treatment.
Nidhi Bhatt, Dharam Buddhi, and Surindra Suthar
Elsevier BV
N K Noran, A K Pandey, Jeyraj Selvaraj, D Buddhi, and V V Tyagi
IOP Publishing
Abstract Advance research in phase change materials (PCMs) has been explored as a novel thermal energy storage (TES) material. The nano-filler of high-conductive material is very promising in improving the material’s thermal properties. Because of the high surface energy of nano-filler, it coagulates quickly and is difficult to disperse in PCMs. Surfactant has been explored by researchers to prevent particle cluster agglomeration and to stabilise particle suspensions. The two-step method has been used widely in synthesising Nano enhanced PCMs (NePCMs) with surfactants. Homogeneous and uniform surfactant dispersion was added not more than 1:1 to the nano-filler. Surfactant shows promising improvement in stabilising the nano-filler in PCMs. Moreover, it improves the NePCMs’ thermal conductivity (TC). However, the latent heat value drops as the nano-filler and surfactant concentrations increase.
A. Islam, A.K Pandey, R. Saidur, D. Buddhi, and V.V. Tyagi
IOP Publishing
Abstract Ability of phase change materials (PCMs) to store and release significant amount of energy during phase transition has attracted a lot of attention in recent years. However, low thermal characteristics of pure PCMs has been a major limitation in their application for thermal energy storage (TES) systems. In this study, thermal properties of paraffin wax A46 (PW-A46) based composites with the addition of silver nanoparticles (Ag NPs) have been investigated. PW-A46 was chosen as the PCM due to its high latent heat of fusion and low cost, while Ag NPs are known for their high thermal conductivity and have been utilized in various composites to improve thermal properties. Ag NPs were added to the paraffin wax at three different weight percentages of 0.3, 0.5, and 0.7 weight percent (wt.%), and composites were prepared using an ultrasonic probe sonicator. Fourier-transform infrared spectroscopy (FTIR) has been done to study chemical bonding and interactions between paraffin and Ag NPs. No new peaks were observed in the FTIR spectra, indicating that addition of Ag NPs did not cause any significant changes in chemical structure of PW-A46. Thermogravimetric analysis (TGA) results showed that composites were stable up to 230°C, indicating their potential for high-temperature thermal energy storage (TES) applications. UV-Vis results demonstrated a 77% increase in the absorbance of the 0.7 wt.% of AgNPs with A46-PW (PW/0.7Ag) composite. Overall, the results suggested that addition of Ag NPs to paraffin wax can improve the optical and thermal characteristics of pure PCM for potential applications.