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18 results on '"Hunt., Julian David"'

10. 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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13. Underground Gravity Energy Storage: A Solution for Long-Term Energy Storage

Author

Hunt, Julian David, primary, Zakeri, Behnam, additional, Jurasz, Jakub, additional, Tong, Wenxuan, additional, Dąbek, Paweł B., additional, Brandão, Roberto, additional, Patro, Epari Ritesh, additional, Đurin, Bojan, additional, Filho, Walter Leal, additional, Wada, Yoshihide, additional, Ruijven, Bas van, additional, and Riahi, Keywan, additional

Published
2023
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14. Challenges and opportunities for a South America Waterway System

Author

Hunt, Julian David, primary, Pokhrel, Yadu, additional, Chaudhari, Suyog, additional, Mesquita, André Luiz Amarante, additional, Nascimento, Andreas, additional, Leal Filho, Walter, additional, Biato, Marcel Fortuna, additional, Schneider, Paulo Smith, additional, and Lopes, Maurício Antônio, additional

Published
2022
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16. Triple Bottom Line impacts of traditional Product-Service Systems models: Myth or truth? A Natural Language Understanding approach

Author

Pacheco, Diego, ten Caten , Carla Schwengber, Jung, Carlos Fernando, Pergher, Isaac, and Hunt, Julian David

Subjects
Ecology, Geography, Planning and Development, Management, Monitoring, Policy and Law
Abstract

Currently, there is in the literature a debate concerning the real impact of Product-Service Systems (PSS) models on society. It is now stated that PSS does not necessarily lead to sustainable solutions in practice from a Triple Bottom Line (TBL) perspective. On the other hand, a promising approach, i.e. the Sustainable Product-Service Systems (SPSS) approach, has received attention from scholars within this debate. However, due to the novelty of this discussion, there is insufficient understanding of the synergies and divergences between both approaches regarding the potential to deliver TBL solutions to society. To address these lacks, this study examines the synergies and divergences between PSS and the emerging SPSS to deliver TBL solutions to society. Qualitative and quantitative research approaches were adopted to address the research questions. First, a structured literature review was employed. The literature analysis was segmented into two distinct periods (i.e., first period from 1990 to 2009, and the second period from 2010 to 2021). Next, the Natural Language Understanding (NLU) tools based on Artificial Intelligence (AI) and Neural Networks were applied to analyse the conceptual definitions retrieved from the relevant literature and extract new knowledge regarding both approaches. Third, the patterns of new knowledge were analysed against the literature in the area leading to research findings. Overall, findings indicate that, from a TBL perspective, SPSS is an emerging and promising approach in which the environmental and social dimensions are more salient than in the traditional PSS models. The study also unveils the central concepts related to both approaches in the extant literature. The article extends the current knowledge on PSS and SPSS, guiding the research communities interested in this area and unlocking the present and future challenges towards an effective sustainable-oriented economy. This article is a pioneering study to examine how the PSS and SPSS concepts have advanced towards TBL solutions in society.

Published
2022

17. Sedimentary Basin Water and Energy Storage: A Low Environmental Impact Option for the Bananal Basin

Author

Hunt, Julian David, primary, Nascimento, Andreas, additional, Guzman, Oldrich Joel Romero, additional, Furtado, Gilton Carlos de Andrade, additional, ten Caten, Carla Schwengber, additional, Tomé, Fernanda Munari Caputo, additional, Leal Filho, Walter, additional, Đurin, Bojan, additional, Lopes, Maurício, additional, and Wada, Yoshihide, additional

Published
2022
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18. Realising the Potential of Renewable Energy as a Tool for Energy Security in Small Island Developing States

Author

Leal Filho, Walter, primary, Balogun, Abdul-Lateef, additional, Surroop, Dinesh, additional, Salvia, Amanda Lange, additional, Narula, Kapil, additional, Li, Chunlan, additional, Hunt, Julian David, additional, Gatto, Andrea, additional, Sharifi, Ayyoob, additional, Feng, Haibo, additional, Tsani, Stella, additional, and Azadi, Hossein, additional

Published
2022
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