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Comprehensive Optimization-based Techno-economic Assessment of Hybrid Renewable Electricity-hydrogen Virtual Power Plants

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Journal of Modern Power Systems and Clean Energy 2023年第2期11卷 553-566页

作者： james naughton Shariq Riaz Michael Cantoni Xiao-Ping Zhang Pierluigi Mancarella University of Melbourne(UoM) Australia University of Birmingham(UoB) UK University of Manchester UK

Hydrogen is being considered as an important option to contribute to energy system decarbonization.However,currently its production from renewables is expensive compared with the methods that utilize fossil fuels.This paper proposes a comprehensive optimization-based techno-economic assessment of a hybrid renewable electricity-hydrogen virtual power plant(VPP)that boosts its business case by co-optimizing across multiple markets and contractual services to maximize its profits and eventually deliver hydrogen at a lower net cost.Additionally,multiple possible investment options are considered.Case studies of VPP placement in a renewable-rich,congested area of the Australian network and based on real market data and relevant sensitivities show that multi-market participation can significantly boost the business case for cleaner hydrogen.This highlights the importance of value stacking for driving down the cost of cleaner hydrogen.Due to the participation in multiple markets,all VPP configurations considered are found to be economically viable for a hydrogen price of 3 AUD$/kg(2.25 USD$/kg),which has been identified as a threshold value for Australia to export hydrogen at a competitive price.Additionally,if the high price volatility that has been seen in gas prices in 2022(and by extension electricity prices)continues,the flexibility of hybrid VPPs will further improve their business cases.

关键词： Virtual power plant techno-economic assessment electrolyser flexibility hydrogen multi-energy system optimal power flow

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Detection of <i>Salmonella enterica</i>Serovar Rissen in Slaughter Pigs in Northern Ireland

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Advances in Microbiology 2017年第6期7卷 513-522页

作者： David A. Egan Violetta naughton james S. Dooley Patrick J. naughton Biomedical Sciences Research Institute School of Biomedical Sciences Ulster University Coleraine UK

Salmonella enterica serovar Rissen has been recognised as a common serovar in humans and pigs around the world. This study investigated S. Rissen prevalence in pigs slaughtered in Northern Ireland additionally looking at antibiotic susceptibility profiles, genetic profiles and plasmid profiles to provide information on an emerging non-typhoid Salmonella serotype with the potential to cause disease in humans. S. Rissen were isolated on five separate sampling occasions from both the boning hall and slaughter line of a randomly selected single pig abattoir in Northern Ireland (NI). Following antibiotic susceptibility testing against 16 antibiotics, all S. Rissen isolates were identified as susceptible to 15 antibiotics but resistant to tetracycline (R-type: Te). Of the 29 S. Rissen, 27 were isolated from pigs originating in NI and two S. Rissen were isolated from pigs originating in the Republic of Ireland (RoI). The combined results of the PFGE and plasmid profiling analyses were capable of subdividing the S. Rissen isolates into three distinct groups. The data suggests that S. Rissen is an emerging serovar in Northern Ireland and continued surveillance of this serovar is warranted as it has the potential to cause disease in humans.

关键词： Antibiotic Susceptibility Testing Pulsed Field Gel Electrophoresis Plasmid Profiles

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