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Your search keyword '"Hunt., Julian David"' showing total 99 results
Start Over Author "Hunt., Julian David" Publication Year Range Last 50 years Publication Type Academic Journals
99 results on '"Hunt., Julian David"'

34. Electric truck gravity energy storage: An alternative to seasonal energy storage.

Author

Hunt, Julian David, Jurasz, Jakub, Zakeri, Behnam, Tong, Wenxuan, Nascimento, Andreas, Guo, Fei, Đurin, Bojan, Dąbek, Paweł, Wada, Yoshihide, van Ruijven, Bas, and Riahi, Keywan

Subjects
*ENERGY storage, *ALTERNATIVE fuels, *CLEAN energy, *ELECTRIC charge, *ELECTRICAL energy, *ELECTRIC trucks
Abstract

The global shift toward a sustainable and eco‐friendly energy landscape necessitates the adoption of long‐term, high‐capacity energy storage solutions. This research introduces an inventive energy storage concept involving the movement of granular materials from a lower elevation to a higher point within natural terrains such as mountains or excavated mining sites. Electrical energy is employed to charge electric batteries that elevate the granular material, thereby storing potential energy. Subsequently, this material is transported down during the electricity generation phase, and the regenerative braking mechanism converts the gravitational energy to replenish the vehicle's battery. The stored energy within these vehicles is then dispatched during peak demand periods or utilized by the vehicles for other freight transportation purposes. Our findings demonstrate a power cost of 1200 USD/kW, an energy storage expense spanning from 1 to 10 USD/kWh, a levelized cost of storage ranging from 35 to 200 USD/MWh, and a global annual potential of approximately 5.4 PWh. Electric vehicle gravity energy storage showcases its capability to bolster sustainable development by offering seasonal and multi‐year energy storage services. [ABSTRACT FROM AUTHOR]

Published
2024
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40. Ammonia Airship Cooling: An Option for Renewable Cooling in the Tropics.

Author

Hunt, Julian David, Zakeri, Behnam, Nascimento, Andreas, Guo, Fei, Freitas, Marcos Aurélio Vasconcelos de, Silva, Cristiano Vitorino, and van Ruijven, Bas

Subjects
*RENEWABLE energy sources, *COOLING, *HYDROGEN economy, *LIQUID hydrogen, *AIRSHIPS, DEVELOPING countries
Abstract

The world is warming, and the demand for cooling is increasing. Developing a future green hydrogen economy will also increase the demand for cooling for hydrogen liquefaction. This increase in cooling demand will happen mainly in tropical and developing countries due to their increase in population, improvements in quality of life, and the export of their renewable potential with liquid hydrogen. To solve this increase in demand for cooling, this paper proposes the use of ammonia airship cooling (AAC). AAC extracts cold from the tropopause (−80 °C) with airships and ammonia refrigeration cycles. The liquid ammonia is then transported back to the surface to provide low temperature cooling services (−33 °C). This cooling service is particularly interesting for lowering the electricity consumption in hydrogen liquefaction plants. If all the technological challenges mentioned in the paper are addressed, it is estimated that the cost of cooling with the technology is 8.25 USD/MWht and that AAC could reduce the electricity demand for hydrogen liquefaction by 30%. AAC is an innovative renewable cooling technology that has the potential to complement other renewable energy sources in a sustainable future. [ABSTRACT FROM AUTHOR]

Published
2024
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48. Assessing Sustainable Ecotourism Opportunities in Western Rajasthan, India, through Advanced Geospatial Technologies.

Author

Chandel, Rajeev Singh, Kanga, Shruti, Singh, Suraj Kumar, Ðurin, Bojan, Oršulić, Olga Bjelotomić, Dogančić, Dragana, and Hunt, Julian David

Abstract

The present study focuses on finding potential sites for ecotourism development using GIS and remote-sensing-based weightage sum overlay techniques in Western Rajasthan, India. Ecotourism is one of the fastest growing and revenue-making sectors incorporating a sustainable future. Western Rajasthan has a broad scope to develop tourism-based activity in various ways, mainly through cultural heritage, historical and archaeological wonders, and rare wildlife. Weightage sum overlay analysis is a useful and simple tool to compare each thematic layer. These values are based on various factors and understanding taken during the study. For this purpose, different data types have been taken from the USGS website. Arc GIS 10.8 and ERDAS Imagine software 2015 have been utilized to process the data. This research incorporates seven thematic layers, i.e., elevation, proximity to streams, land use/cover, population density, road connectivity, proximity to protected areas, and heritage hotspots. Based on the physical and cultural characteristics of Western Rajasthan, the weightage of each thematic layer has been decided, which is finally overlaid using Arc GIS software. After processing all the thematic layers, we finally get an outcome in the form of a suitability map. The final suitability map represents five suitability classes that divide the total area into the following categories, very high (37.31%), high (26.85%), moderate (7.89%), low (0.83%), and very low (27.12%), which represents the potential of ecotourism in Western Rajasthan. [ABSTRACT FROM AUTHOR]

Published
2023
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50. Isothermal Deep Ocean Compressed Air Energy Storage: An Affordable Solution for Seasonal Energy Storage.

Author

Hunt, Julian David, Zakeri, Behnam, Nascimento, Andreas, de Jesus Pacheco, Diego Augusto, Patro, Epari Ritesh, Đurin, Bojan, Pereira, Márcio Giannini, Filho, Walter Leal, and Wada, Yoshihide

Subjects
*ENERGY storage, *COMPRESSED air, *OFFSHORE wind power plants, *WIND power, *OCEAN mining, *ISOTHERMAL compression
Abstract

There is a significant energy transition in progress globally. This is mainly driven by the insertion of variable sources of energy, such as wind and solar power. To guarantee that the supply of energy meets its demand, energy storage technologies will play an important role in integrating these intermittent energy sources. Daily energy storage can be provided by batteries. However, there is still no technology that can provide weekly, monthly and seasonal energy storage services where pumped hydro storage is not a viable solution. Herein, we introduce an innovative energy storage proposal based on isothermal air compression/decompression and storage of the compressed air in the deep sea. Isothermal deep ocean compressed air energy storage (IDO-CAES) is estimated to cost from 1500 to 3000 USD/kW for installed capacity and 1 to 10 USD/kWh for energy storage. IDO-CAES should complement batteries, providing weekly, monthly and seasonal energy storage cycles in future sustainable energy grids, particularly in coastal areas, islands and offshore and floating wind power plants, as well as deep-sea mining activities. [ABSTRACT FROM AUTHOR]

Published
2023
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