Browsing by Author "Jha, Shibani Khanra"

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Economical design of rectangular footing subjected to uplift due to biaxial moments
(Springer, 2025-03) Mittal, Ravi Kant; Jha, Shibani Khanra
The superstructural load of the building is transferred to the ground through footing. The Footings are typically subjected to axial loads and biaxial moments. When moments are large it is uneconomical to design footings for full contact area of footing. Therefore, various codes permit uplifting of foundations. Solutions of footings subjected to biaxial moments during uplift are complex and time-consuming. Also, several algorithms are needed to achieve the desired results. This paper proposes a simplified solution to optimize footings under uplift subjected to biaxial moments. The footing with biaxial moments is categorised into different zones based on the location of neutral axis and position of eccentricity of the load. The approach described in this study utilizes the functions of the Excel solver while adding the necessary constraints to determine the minimal size of the rectangular footing. Further, the maximum pressures for different zones were estimated, and optimisation was carried out with the appropriate constraints for each zone separately. The values obtained by this approach were compared with those in the literature, and percentage decrease in the footing area was observed from 1.1 to 15.7%.
Experimental Studies and Analysis for Performance Assessment of Floating Solar Photovoltaic Systems
(IOP, 2024) Mittal, Ravi Kant; Jha, Shibani Khanra; Singh, Ajit Pratap; Soni, Manoj Kumar
The Floating Solar Photovoltaic (FSPV) systems are expected to perform relatively at a higher efficiency level as compared to ground mounted PV systems. The major factor affecting the operating efficiency of a solar panel is the operating temperature of the PV panel which is relatively lower as compared to ground mounted PV system. To accomplish this, an experiment setup of FSPV system has been developed which consists of solar panels operating at different heights above water surface. The findings indicate that FSPV modules can reduce the module temperature by up to 4°C – 7°C. The performance of FSPV has been analysed under diurnal conditions. The performance has been assessed in terms of power output by utilising module parameters. The results highlight the power output from solar panel under varying heights help to optimize the operating heights of the solar panels over the water bodies to achieve maximum power output. Therefore, it is also advised for FSPV to raise the PV modules to their optimal height. The FSPV systems at 500 mm height provided 1.8-3.78% higher power output than ground mounted PV systems, maximum of all the panels above water.
Floating solar photovoltaic (FSPV) installations at varying heights: evaporation reduction estimation for major dams of the tropical region of Uttar Pradesh, India
(IOP, 2025) Singh, Ajit Pratap; Jha, Shibani Khanra; Mittal, Ravi Kant
Any tropical region is well known for its high levels of sunshine and is suitable for PV installations with the associated disadvantage of high evaporation rates. FSPV is an alternate approach for solar PV installations in such regions to harness maximum solar energy with the additional advantage of reducing evaporation from water bodies. The study on estimating the reduction in evaporation due to FSPV installations and associated panel height above the water surface is limited. This study aims to quantify the reduction in evaporation resulting from the deployment of floating solar photovoltaic (FSPV) systems above water surfaces. It also determines the panel height above water bodies to maximize evaporation reduction. These findings are then extended to evaluate the impact of FSPV installations on reducing evaporation over the major dams in the tropical region of Uttar Pradesh, India. The experimental results highlighted that the maximum evaporation reduction occurred from the water surface covered with a panel at a height of 300 mm above the water with an evaporation reduction of 23.44 %. The extrapolation of the study for 28 major dams of Uttar Pradesh, reveals an annual water saving of 92.56 million cubic meters (MCM) with FSPV coverage of 25%. Based on estimations, a 1 MWp FSPV installation considerable amount of water annually can fetch water for 67 individuals in a tropical region, assuming 100 lpcd. These research outcomes would provide valuable insights into FSPV technology and its potential to mitigate water evaporation, with implications for regional and national water and energy resource management policies.
Perspective and strategies on newage education and creative learning
(Springer, 2024) Jha, Shibani Khanra; Bhattacharyya, Tamali
This book presents the proceedings of the International Conference on Best Innovative Teaching Strategies (ICOBITS) at BITS Pilani on Feb 9-11, 2023. It brings together global academicians, researchers, and industry experts to delve into innovative teaching-learning practices. Meticulously selected and reviewed by professionals, the proceedings offer cross-cutting perspectives and strategies in education and creative learning. It is organized into four parts and covers Innovative Pedagogical Practices for Technology Enhanced Learning, Technology, Society and Industry in Higher Education, STEM Education and Cultural Studies, Gender Studies and Sustainability in Higher Education. It provides insights into assessment tools for effectively evaluating the efficiency of teaching methods. Part one explores ICT, digital classrooms, metaverse-based teaching, gamification, and AI-ML-based practices. Part two delves into the humanistic approach in technical education, social networking as an educational tool, and outcome-based assessment needs. Part three addresses future educators' requirements through multidisciplinary collaboration in STEM education. Part four discusses gender equity, structured social inclusion and cultural skills in teaching-learning practices. This book is a valuable resource for academicians, researchers, policymakers, administrators, technocrats, and developers actively engaged in education technology across disciplines such as Engineering, Sciences, Management, Humanities, and Social Sciences.
Predictive Modeling of Solar PV Panel Operating Temperature over Water Bodies: Comparative Performance Analysis with Ground-Mounted Installations
(MDPI, 2024-05) Jha, Shibani Khanra; Mittal, Ravi Kant; Singh, Ajit Pratap; Soni, Manoj Kumar
Solar panel efficiency is significantly influenced by its operating temperature. Recent advancements in emerging renewable energy alternatives have enabled photovoltaic (PV) module installation over water bodies, leveraging their increased efficiency and associated benefits. This paper examines the operational performance of solar panels placed over water bodies, comparing them to ground-mounted solar PV installations. Regression models for panel temperature are developed based on experimental setups at BITS Pilani, India. Developed regression models, including linear, quadratic, and exponential, are utilized to predict the operating temperature of solar PV installations above water bodies. These models incorporated parameters such as ambient temperature, solar insolation, wind velocity, water temperature, and humidity. Among these, the one-degree regression models with three parameters outperformed the models with four or five parameters with a prediction error of 5.5 °C. Notably, the study found that the annual energy output estimates from the best model had an error margin of less than 0.2% compared to recorded data. Research indicates that solar PV panels over water bodies produce approximately 2.59% more annual energy output than ground-mounted systems. The newly developed regression models provide a predictive tool for estimating the operating temperature of solar PV installations above water bodies, using only three meteorological parameters: ambient temperature, solar insolation, and wind velocity, for accurate temperature prediction.
Students’ Perspective of the Sudden Shift from Traditional Classroom to Online Teaching Mode Under COVID-19 Situation: A Case Study
(ICON BITS, 2022-02) Jha, Shibani Khanra; Roy, Banasri
The study aims to understand the perspectives of higher education students regarding the sudden transition from a traditional class to online mode during COVID-19 in India. A survey was conducted among 260 undergraduates and graduate students from civil and chemical engineering branches; based on 15 quantitative and 4 qualitative questions. Students appreciate the flexibility they acquire in terms of timing, necessity and interest to watch the recorded lectures. A peaceful learning environment without distraction/disturbance helps them to focus. But the unfamiliarity of the mode and the relaxed unmonitored situation are considered unfavourable. Improved technical infrastructure and better preparedness from the teacher’s side are recommended. This study articulates the students’ perspective and expectations from the online mode of teaching/learning, which would help improve the quality of the instruction process. Authors understand that this study addressing the entire instruction framework delivered live in online synchronous mode due to the unprecedented pandemic environment has not been reported previously.