Bikash Pattanayak
@tempsens.com
Senior Research and Development Engineer/ Calsys
Tempsens Instruments Pvt. Ltd.
RESEARCH, TEACHING, or OTHER INTERESTS
Mechanical Engineering, Fluid Flow and Transfer Processes, Surfaces, Coatings and Films
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Bikash Pattanayak, Prince Kumar Rai, Hardik Kothadia, and Ankur Gupta
Elsevier BV
Bikash Pattanayak and Hardik B. Kothadia
ASME International
Abstract The heat transfer during pool boiling incorporates a higher rate of heat dissipation capability at low-temperature differences. This technique is widely used in the nuclear industry for thermal management. In this study, the effect of tube diameter and length on critical heat flux (CHat atmospheric conditions in saturated water during pool boiling) is analyzed. The tubes of SS 304 are kept in the vertical orientation. The diameter of the tubes ranges from 1.2 mm to 9 mm. The experiments are performed with tubes having lengths varying from 50 mm to 1000 mm. It has been noted that tubes of smaller diameter show a greater magnitude of critical heat flux (CHF) for the given length. Compared to other tubes, the magnitude of CHF for a 1.2 mm diameter is higher. For a given diameter, a longer tube is found to have lower CHF than the ones having lesser length. The variation in the CHF magnitude is negligible for tubes with a diameter of more than 2.5 mm beyond a length of 200 mm. The location of occurrence of CHF is near the bottom end of the vertical tube. The study illustrates the behavior of bubble nucleation for various tube dimensions and heat fluxes. The inception and detachment of bubbles for different tubes are analyzed. The pool boiling regime is categorized and studied basing the behavior of the incepted and departed bubble while maintaining uniform heat flux. A mathematical relation that empirically accounts for the effect of tube dimensions , i.e., length and diameter on pool boiling CHF is proposed. The experimental CHF data obtained during pool boiling are tabulated toward contributing to the CHF databank.
Bikash Pattanayak, Sarath S. Lal, and Hardik B. Kothadia
Wiley
AbstractSaltwater or brackish water is used as a coolant in most industries. Therefore, understanding the heat transfer processes and hydrodynamics during the natural convection in saline water is crucial for enhancing the efficiency of a heat exchanger. This study elaborates on the natural convection heat transfer in saline water under atmospheric conditions. A DC power supply is used to regulate the power given to the heater in a liquid pool for thermal analysis. The pool liquid comprises solutions with varying salinity from 0%, 0.2%, 0.5%, and 2%. The effect of varying salinity on the heat transfer coefficient and the thermal aspects encountered during the desalination process is analyzed. The temperature distribution across the surface of the heater is monitored using an infrared camera. It is studied for the solution of different salinities. The heat transfer coefficient and Nusselt number are investigated during natural convection for normal water and salt solution of different concentrations. It is inferred from the study that in the regime of natural convection, there is no significant difference in the Nusselt number for normal water and saltwater for the lower value of temperature difference between the plate and pool. The heat transfer coefficient in 0.2% saline water is higher as compared to the other solutions.
Bikash Pattanayak, Sarath. S Lal, and Hardik B. Kothadia
Springer Science and Business Media LLC
Bikash Pattanayak, Smrutimayee Nanda, and Niranjan Kumar
IEEE
This article provides a simplified model of a 3MWp grid-connected solar photovoltaic plant to assess the plant’s performance under various irradiance and temperature circumstances. Two types of MPPT controllers are designed here. One is based on P&O technology and the other is based on ANN-based MPPT controller with PSO algorithm. The Particle Swarm Optimization (PSO) algorithm, which depends on each individual and its neighbors at each step, was inspired by the behavior of animals like fish flocking or bird schooling etc. The main idea of using the PSO algorithm is to estimate the ANN model efficiently and accurately by reducing the computation time. The performance of the plant in both methods has been evaluated through MATLAB SIMULINK.
Bikash Pattanayak, Smrutimayee Nanda, and Niranjan Kumar
IEEE
The advantages of RES for the environment have made them commercially viable and widely used today. The microgrid is also crucial to conventional power distribution systems due to its improved dependability and reduced overall energy losses. For more adaptability, renewable energy sources (RES) including solar, wind, batteries, fuel, tidal, etc., satisfy massive power demands based on dispersed generation and non-linear loads, which may result in power quality problems like voltage sag/swell and harmonic distortion. Many power-conditioning types of equipment are used to solve PQ issues. Among them, UPQC acts as the most significant choice for reducing PQ issues. As a result, a literature review was conducted in this research, using the 30 most significant research publications from IEEE, Science Direct, and Springer journals. These contirbutuons were all compiled between the years 2010 and 2021. This study has examined 30 academic research contributions in several ways, including from the perspectives of optimization algorithms and AI-based control strategies, to get an understanding of what are all about. Additionally, each work's performance under sag/swell conditions is demonstrated in terms of voltage, current, and THD. Furthermore, the present challenges in UPQC power quality enhancement methods for distributed generators connected to the grid will be described, which will be a significant milestone for researchers in the future.
Bikash Pattanayak, Sarath S. Lal, and Hardik B. Kothadia
Informa UK Limited
Bikash Pattanayak, Ajay Kumar Gupta, and Hardik B. Kothadia
Elsevier BV
Bikash Pattanayak, Ajay Kumar Gupta, and Hardik B. Kothadia
Elsevier BV
Bikash Pattanayak and Hardik Kothadia
Informa UK Limited
Abstract Pool boiling is cost-effective, simple and prevalent amongst all available cooling schemes. The lack of quantitative data, qualitative theories and explanations in the area of critical heat flux (CHF) in mini tubes makes it an interesting domain of research. This paper discusses the effect of heater length, diameter, orientation and subcooling on CHF. There is the scarcity of literature that considers all the effects altogether. This paper analyses the effect of all the parameters together in a single study. SS304 mini tubes of 2.5- and 1.2-mm diameters with various lengths are used as a heater in horizontal and vertical orientations. The water pool is kept at 30, 50, 75 °C and saturation temperature. The study is performed at atmospheric pressure. It has been observed that with the increase in pool temperature, the magnitude of CHF decreases. The shortest length has a higher magnitude of CHF corresponding to a given pool temperature. The values of CHF decrease with an increase in tube diameter. The CHF value is higher for horizontal as compared to vertical orientation. An empirical correlation, including the effect of subcooling, orientation and tube dimensions is derived from the CHF data. The experimental data is presented in a tabulated form to contribute to pool boiling CHF databank.
Bikash Pattanayak, Harsh Deswal, Vivek Saxena, and Hardik Kothadia
Springer Singapore
Bikash Pattanayak, Abhishek Mund, J. S. Jayakumar, Kajal Parashar, and Sujay K. S. Parashar
Wiley
AbstractThis paper deals with experimental studies carried out to analyze heat transfer characteristics of Al2O3–, CuO–, TiO2–, and ZnO–water based nanofluids in a double‐pipe, counter flow heat exchanger for different volume concentrations (0.025%, 0.05%, 0.075%, and 0.1%) of the nanofluids. The fabricated double‐pipe heat exchanger is made up of two different materials, viz., copper as the inner tube and unplasticized polyvinyl chloride as the outer tube. The density, viscosity, and thermal conductivity were calculated, and were used to estimate dimensionless numbers, such as Reynolds number, Prandtl number, and Nusselt number, and also to estimate heat exchanger effectiveness. High‐energy ball milling technique was used to prepare nanoparticles and were characterized using X‐ray diffraction, scanning electron microscopy, and transmission electron microscopy. Polyvinyl alcohol (3%) was used as a surfactant for making the nanofluids stable. It was observed from the experiment that with the increase in the volume concentration, thermal conductivity, viscosity, and friction factor increase, whereas the Reynolds number decreases. The experimentally observed data for Nusselt number were formulated into a correlation that matches the data for all these nanofluids within an error of 11.4%. It was found that the highest effectiveness was obtained while using TiO2–water nanofluids than other nanofluids.
Vivek Saxena, Harsh Deswal, Bikash Pattanayak, and Hardik Kothadia
Elsevier BV
Abhishek Mund, Bikash Pattanayak, J. S. Jayakumar, Kajal Parashar, and S. K. S. Parashar
Springer Singapore
Bikash Pattanayak, Abhishek Mund, J. S. Jayakumar, Kajal Parashar, and S. K. S. Parashar
Springer Singapore