Namrata Bist

Bio: Namrata Bist is an academic researcher from Pandit Deendayal Petroleum University. The author has contributed to research in topics: Geothermal gradient & Renewable energy. The author has an hindex of 2, co-authored 8 publications receiving 15 citations.

Holistic review of hybrid renewable energy in circular economy for valorization and management

Abstract: The world requires genuine endeavors for gradual introduction of sustainable power sources to satisfy the future energy needs. Renewable energy (RE) of enormous capacity exists at various geological locations but suffers from intermittent nature. In such situations, one RE can complement other and improve the system’s efficiency. This is an example of valorization where hybridization improves the quality of a commodity. It has been found out that hybrid of two or more technologies, alongside storage can improve framework efficiency. The hybrid energy sources follows up on the idea of circular economy where the circular progression of resource–product–recycled​ resources is planned for decreasing both the utilization of raw materials and waste generation. It has been found that despite the fact that such projects are expensive at the beginning; in long term they prove to be advantageous. The paper discusses about the hybrids done so far and through case studies and economic analysis. It also suggests which hybrid arrangements can assist each other. The present study examines the major problems associated with hybrid renewable energy and identifies the solutions. The paper comes up with a novel low cost hybrid solution of solar and geothermal which is implemented in the geothermal plant in Gujarat, India. It is discussed that the concept of hybrid renewable energy when put into a circular economy model, would give solutions that are affordable, practical and provides societal benefits.

Geochemical analysis and quality assessment of geothermal water in Gujarat, India

Abstract: Geothermal water can have a wide range of direct applications, including drinking, domestic use, irrigation and industrial use. This study analyses geothermal water from Dholera, Diu, Gandhar, Kutch, Porbandar, Tulsishyam, and Unai regions located in Gujarat, India, to determine the hydrochemistry for establishing the water's suitability for drinking and irrigation purposes. From each region, three different water samples were collected. For drinking purpose, total eleven water quality parameters such as pH, electrical conductivity, total dissolved solids, calcium, magnesium, sodium, potassium, chloride, sulphate, carbonate and bicarbonate were evaluated. Piper and Durov plots were used to understand the ionic composition and evolution of water. Whereas for irrigation, the parameters such as total dissolved solids, sodium absorption ration, electrical conductivity, and potential salinity were used for water quality check. Wilcox Plot was plotted to understand the sodium and salinity hazard of water. Water quality index and irrigation water quality index were used to assess the water quality for making the analytical procedure easy. The findings indicate that the water samples from the Dholera and Diu areas had extremely high values for both the water quality index and total dissolved solids content. Water in these places may be appropriate for making salt. All the other samples show adequacy for utilization in irrigation purpose. • Geochemical analysis of seven geothermal potential zones. • Water quality index analysis to evaluate the suitability of groundwater for drinking. • Water quality index analysis for irrigation.

Green hydrogen: Alternate fuel for Indian energy basket

Abstract: Hydrogen has emerged as an alternative feasible substitute for green economy in India. The production and transportation of green hydrogen are reviewed extensively in this study. The constraints related to policy framework and remedies for the same are discussed. Comparative outlook of green hydrogen in lieu of Indian economy is shared. Considering the automotive sector's phenomenal economic and environmental significance, the introduction of renewable fuels will be essential in achieving long-term mobility globally. Hydrogen has the potential to be a feasible and effective fuel for green economy since it is abundant, sustainable, safe and inexpensive. Hydrogen proves to be an alternative chemical fuel that will potentially replace fossil energy, due to a number attributes like increased energy density, abundance, ease of transportation, a variety of different manufacturing processes from clean renewable energy fuels with zero or negligible emissions. Internal combustion engines that uses hydrogen could help optimize efficiencies, provide larger power outputs per vehicle, and produce fewer greenhouse gases. The production methods and transportation of green hydrogen are reviewed in this study. The study critically addresses the impact of green hydrogen on the environment, as well as the hazards and safety issues. The study also discusses the challenges associated with the green hydrogen and deliberates on the pillars for developing policies and the strategies for green hydrogen in India. Graphical abstract

Energy Transition in Poland—Assessment of the Renewable Energy Sector

Abstract: The topic of the article considers the functioning of the renewable energy (RE) sector in Poland. This is really important in the context of the energy transition of the national economy because it influences the creation of modern technologies and increases the competitiveness and innovation of the country. Poland is in a process of energy transition where the RE sector has been developing for two decades. The authors aimed to research the RE sector improvement possibilities in Poland, including the influence of this sector on chosen social and economic aspects. Because of this research’s aim a critical situation assessment of RE in Poland was conducted and a survey of a group of experts in this field was also involved. Legal, physical and mental determinants and their influence on RE sector were looked into. In the legal determinant context a necessity to simplify relevant legislation acts in Poland was found. Undoubtedly there is a need to improve several legal acts, including the Distance Act. In physical determinants it was found that solar, wind and biomass energy have the biggest chances for development. In the case of mental determinants the authors paid attention to the need of educating the public about using and obtaining energy. It is also important to make people aware how the RE sector influences the low emission economy positively. This will improve the creation of new jobs and reduce the emissions of harmful substances to the environment.

A Review of Applications, Prospects, and Challenges of Proton-Conducting Zirconates in Electrochemical Hydrogen Devices

Abstract: In the future, when fossil fuels are exhausted, alternative energy sources will be essential for everyday needs. Hydrogen-based energy can play a vital role in this aspect. This energy is green, clean, and renewable. Electrochemical hydrogen devices have been used extensively in nuclear power plants to manage hydrogen-based renewable fuel. Doped zirconate materials are commonly used as an electrolyte in these electrochemical devices. These materials have excellent physical stability and high proton transport numbers, which make them suitable for multiple applications. Doping enhances the physical and electronic properties of zirconate materials and makes them ideal for practical applications. This review highlights the applications of zirconate-based proton-conducting materials in electrochemical cells, particularly in tritium monitors, tritium recovery, hydrogen sensors, and hydrogen pump systems. The central section of this review summarizes recent investigations and provides a comprehensive insight into the various doping schemes, experimental setup, instrumentation, optimum operating conditions, morphology, composition, and performance of zirconate electrolyte materials. In addition, different challenges that are hindering zirconate materials from achieving their full potential in electrochemical hydrogen devices are discussed. Finally, this paper lays out a few pathways for aspirants who wish to undertake research in this field.

A new 3D composite of V2O5-based biodegradable ceramic material prepared by an environmentally friendly thermal method for supercapacitor applications

Abstract: Major obstacles associated with aqueous supercapacitor materials such as slower rate capability and shorter cyclic lives are commonly found in pure V2O5 electrodes, limiting their extensive applications. This study demonstrates the preparation of a novel V2O5 composite grown on a biodegradable ceramic material of three-dimensional (3D) vanadium aluminum carbide (V2O5@V2AlC) with a convenient thermal oxidation process to reinforce its structural stability for improved electrochemical performance. The physicochemical properties of the composite were investigated using X-ray diffraction for phase analysis, scanning electron microscopy for surface morphology, energy dispersive X-ray for elemental composition, and Brunauer–Emmet–Teller analysis for specific surface area measurements. When investigated as supercapacitor electrodes in three different aqueous electrolytic media such as acidic (1 M H2SO4), neutral (0.5 M K2SO4), and alkaline (1 M KOH) solution, the composite exhibits enhanced electrochemical performance in the neutral solution. The maximum specific areal capacitance of 680 mF cm−2 at 5 mVs −1 and 740 mF cm−2 at 2 mA cm−2 was obtained and with improved cyclic stability. The enhanced capacitance properties and extended cyclic life along with the lower charge transfer resistance of the 3D-V2O5@V2AlC composite can be attributed to the strong mechanical properties of the material with an excellent capacitive contribution.