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Techno-economic optimization of a zero emission energy system for a coastal community in Newfoundland, Canada

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  • Islam, M.S.
  • Das, Barun K.
  • Das, Pronob
  • Rahaman, Md Habibur

Abstract

Research into renewable hybridized PV/Wind/Hydro with pumped hydro storage (PHS) options is rarely investigated in the literature for meeting a community’s electricity demand in Newfoundland, Canada. The pumped hydro storage-based hybrid system is compared with the battery-based configurations. A detailed techno-economic and environmental potential of hybridized energy systems with the pumped hydro storage are examined over conventional battery storage and diesel-only systems. The study also investigates the effects of uncertainty of renewable resources, load data, and hydro resources on the sizing of the hybrid system.

Suggested Citation

  • Islam, M.S. & Das, Barun K. & Das, Pronob & Rahaman, Md Habibur, 2021. "Techno-economic optimization of a zero emission energy system for a coastal community in Newfoundland, Canada," Energy, Elsevier, vol. 220(C).
    • Handle: RePEc:eee:energy:v:220:y:2021:i:c:s0360544220328164
    DOI: 10.1016/j.energy.2020.119709
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    as
    1. John, Bony & Thomas, Rony N. & Varghese, James, 2020. "Integration of hydrokinetic turbine-PV-battery standalone system for tropical climate condition," Renewable Energy, Elsevier, vol. 149(C), pages 361-373.
    2. Xu, Xiao & Hu, Weihao & Cao, Di & Huang, Qi & Chen, Cong & Chen, Zhe, 2020. "Optimized sizing of a standalone PV-wind-hydropower station with pumped-storage installation hybrid energy system," Renewable Energy, Elsevier, vol. 147(P1), pages 1418-1431.
    3. Rajbongshi, Rumi & Borgohain, Devashree & Mahapatra, Sadhan, 2017. "Optimization of PV-biomass-diesel and grid base hybrid energy systems for rural electrification by using HOMER," Energy, Elsevier, vol. 126(C), pages 461-474.
    4. Lee, Ji Hyung & Shin, Youngki, 2023. "Complete Subset Averaging For Quantile Regressions," Econometric Theory, Cambridge University Press, vol. 39(1), pages 146-188, February.
    5. Ramli, Makbul A.M. & Bouchekara, H.R.E.H. & Alghamdi, Abdulsalam S., 2018. "Optimal sizing of PV/wind/diesel hybrid microgrid system using multi-objective self-adaptive differential evolution algorithm," Renewable Energy, Elsevier, vol. 121(C), pages 400-411.
    6. Fodhil, F. & Hamidat, A. & Nadjemi, O., 2019. "Potential, optimization and sensitivity analysis of photovoltaic-diesel-battery hybrid energy system for rural electrification in Algeria," Energy, Elsevier, vol. 169(C), pages 613-624.
    7. Patel, Alpesh M. & Singal, Sunil Kumar, 2019. "Optimal component selection of integrated renewable energy system for power generation in stand-alone applications," Energy, Elsevier, vol. 175(C), pages 481-504.
    8. Bhattarai, Prasid Ram & Thompson, Shirley, 2016. "Optimizing an off-grid electrical system in Brochet, Manitoba, Canada," Renewable and Sustainable Energy Reviews, Elsevier, vol. 53(C), pages 709-719.
    9. Wang, Xiaoqian & Kang, Yanfei & Hyndman, Rob J. & Li, Feng, 2023. "Distributed ARIMA models for ultra-long time series," International Journal of Forecasting, Elsevier, vol. 39(3), pages 1163-1184.
    10. Abdelkader, Abbassi & Rabeh, Abbassi & Mohamed Ali, Dami & Mohamed, Jemli, 2018. "Multi-objective genetic algorithm based sizing optimization of a stand-alone wind/PV power supply system with enhanced battery/supercapacitor hybrid energy storage," Energy, Elsevier, vol. 163(C), pages 351-363.
    11. Bekele, Getachew & Tadesse, Getnet, 2012. "Feasibility study of small Hydro/PV/Wind hybrid system for off-grid rural electrification in Ethiopia," Applied Energy, Elsevier, vol. 97(C), pages 5-15.
    12. Hosseinalizadeh, Ramin & Shakouri G, Hamed & Amalnick, Mohsen Sadegh & Taghipour, Peyman, 2016. "Economic sizing of a hybrid (PV–WT–FC) renewable energy system (HRES) for stand-alone usages by an optimization-simulation model: Case study of Iran," Renewable and Sustainable Energy Reviews, Elsevier, vol. 54(C), pages 139-150.
    13. Aziz, Ali Saleh & Tajuddin, Mohammad Faridun Naim & Adzman, Mohd Rafi & Azmi, Azralmukmin & Ramli, Makbul A.M., 2019. "Optimization and sensitivity analysis of standalone hybrid energy systems for rural electrification: A case study of Iraq," Renewable Energy, Elsevier, vol. 138(C), pages 775-792.
    14. Ma, Tao & Yang, Hongxing & Lu, Lin & Peng, Jinqing, 2015. "Pumped storage-based standalone photovoltaic power generation system: Modeling and techno-economic optimization," Applied Energy, Elsevier, vol. 137(C), pages 649-659.
    15. Gustavsson, Leif & Haus, Sylvia & Ortiz, Carina A. & Sathre, Roger & Truong, Nguyen Le, 2015. "Climate effects of bioenergy from forest residues in comparison to fossil energy," Applied Energy, Elsevier, vol. 138(C), pages 36-50.
    16. Qifa Xu & Chao Cai & Cuixia Jiang & Fang Sun & Xue Huang, 2020. "Block average quantile regression for massive dataset," Statistical Papers, Springer, vol. 61(1), pages 141-165, February.
    17. Sinha, Sunanda & Chandel, S.S., 2015. "Review of recent trends in optimization techniques for solar photovoltaic–wind based hybrid energy systems," Renewable and Sustainable Energy Reviews, Elsevier, vol. 50(C), pages 755-769.
    18. Cano, Antonio & Arévalo, Paul & Jurado, Francisco, 2020. "Energy analysis and techno-economic assessment of a hybrid PV/HKT/BAT system using biomass gasifier: Cuenca-Ecuador case study," Energy, Elsevier, vol. 202(C).
    19. Guangqian, Du & Bekhrad, Kaveh & Azarikhah, Pouria & Maleki, Akbar, 2018. "A hybrid algorithm based optimization on modeling of grid independent biodiesel-based hybrid solar/wind systems," Renewable Energy, Elsevier, vol. 122(C), pages 551-560.
    20. Das, Barun K. & Hoque, Najmul & Mandal, Soumya & Pal, Tapas Kumar & Raihan, Md Abu, 2017. "A techno-economic feasibility of a stand-alone hybrid power generation for remote area application in Bangladesh," Energy, Elsevier, vol. 134(C), pages 775-788.
    21. Kaplan, Yusuf Alper, 2015. "Overview of wind energy in the world and assessment of current wind energy policies in Turkey," Renewable and Sustainable Energy Reviews, Elsevier, vol. 43(C), pages 562-568.
    22. Kumar, Jitendra & Suryakiran, B.V. & Verma, Ashu & Bhatti, T.S., 2019. "Analysis of techno-economic viability with demand response strategy of a grid-connected microgrid model for enhanced rural electrification in Uttar Pradesh state, India," Energy, Elsevier, vol. 178(C), pages 176-185.
    23. Mark F. J. Steel, 2020. "Model Averaging and Its Use in Economics," Journal of Economic Literature, American Economic Association, vol. 58(3), pages 644-719, September.
    24. Li, Jia & Liao, Zhipeng, 2020. "Uniform nonparametric inference for time series," Journal of Econometrics, Elsevier, vol. 219(1), pages 38-51.
    25. Khan, Mohammad Junaid & Yadav, Amit Kumar & Mathew, Lini, 2017. "Techno economic feasibility analysis of different combinations of PV-Wind-Diesel-Battery hybrid system for telecommunication applications in different cities of Punjab, India," Renewable and Sustainable Energy Reviews, Elsevier, vol. 76(C), pages 577-607.
    26. Chowdhury, Tamal & Chowdhury, Hemal & Miskat, Monirul Islam & Chowdhury, Piyal & Sait, Sadiq M. & Thirugnanasambandam, M. & Saidur, R., 2020. "Developing and evaluating a stand-alone hybrid energy system for Rohingya refugee community in Bangladesh," Energy, Elsevier, vol. 191(C).
    27. Das, Barun K. & Al-Abdeli, Yasir M. & Kothapalli, Ganesh, 2017. "Optimisation of stand-alone hybrid energy systems supplemented by combustion-based prime movers," Applied Energy, Elsevier, vol. 196(C), pages 18-33.
    28. Malheiro, André & Castro, Pedro M. & Lima, Ricardo M. & Estanqueiro, Ana, 2015. "Integrated sizing and scheduling of wind/PV/diesel/battery isolated systems," Renewable Energy, Elsevier, vol. 83(C), pages 646-657.
    29. Luta, Doudou N. & Raji, Atanda K., 2019. "Optimal sizing of hybrid fuel cell-supercapacitor storage system for off-grid renewable applications," Energy, Elsevier, vol. 166(C), pages 530-540.
    30. Seojeong Lee & Youngki Shin, 2021. "Complete subset averaging with many instruments," The Econometrics Journal, Royal Economic Society, vol. 24(2), pages 290-314.
    31. Maatallah, Taher & Ghodhbane, Nahed & Ben Nasrallah, Sassi, 2016. "Assessment viability for hybrid energy system (PV/wind/diesel) with storage in the northernmost city in Africa, Bizerte, Tunisia," Renewable and Sustainable Energy Reviews, Elsevier, vol. 59(C), pages 1639-1652.
    32. Kusakana, Kanzumba, 2014. "Techno-economic analysis of off-grid hydrokinetic-based hybrid energy systems for onshore/remote area in South Africa," Energy, Elsevier, vol. 68(C), pages 947-957.
    33. Huang, Dashan & Li, Jiangyuan & Wang, Liyao & Zhou, Guofu, 2020. "Time series momentum: Is it there?," Journal of Financial Economics, Elsevier, vol. 135(3), pages 774-794.
    34. Bhattacharya, Mita & Paramati, Sudharshan Reddy & Ozturk, Ilhan & Bhattacharya, Sankar, 2016. "The effect of renewable energy consumption on economic growth: Evidence from top 38 countries," Applied Energy, Elsevier, vol. 162(C), pages 733-741.
    35. Ramli, Makbul A.M. & Hiendro, Ayong & Twaha, Ssennoga, 2015. "Economic analysis of PV/diesel hybrid system with flywheel energy storage," Renewable Energy, Elsevier, vol. 78(C), pages 398-405.
    36. Zhang, Weiping & Maleki, Akbar & Rosen, Marc A. & Liu, Jingqing, 2018. "Optimization with a simulated annealing algorithm of a hybrid system for renewable energy including battery and hydrogen storage," Energy, Elsevier, vol. 163(C), pages 191-207.
    37. Mukhopadhyay, Bineeta & Das, Debapriya, 2020. "Multi-objective dynamic and static reconfiguration with optimized allocation of PV-DG and battery energy storage system," Renewable and Sustainable Energy Reviews, Elsevier, vol. 124(C).
    38. Javed, Muhammad Shahzad & Song, Aotian & Ma, Tao, 2019. "Techno-economic assessment of a stand-alone hybrid solar-wind-battery system for a remote island using genetic algorithm," Energy, Elsevier, vol. 176(C), pages 704-717.
    39. James Poterba, 2020. "Series Introduction," Environmental and Energy Policy and the Economy, University of Chicago Press, vol. 1(1), pages 1-2.
    40. Das, Barun K. & Al-Abdeli, Yasir M. & Woolridge, Matthew, 2019. "Effects of battery technology and load scalability on stand-alone PV/ICE hybrid micro-grid system performance," Energy, Elsevier, vol. 168(C), pages 57-69.
    41. Chen, Weidong & Geng, Wenxin, 2017. "Fossil energy saving and CO2 emissions reduction performance, and dynamic change in performance considering renewable energy input," Energy, Elsevier, vol. 120(C), pages 283-292.
    42. Yuancheng Si & Saralees Nadarajah, 2020. "Lindley Power Series Distributions," Sankhya A: The Indian Journal of Statistics, Springer;Indian Statistical Institute, vol. 82(1), pages 242-256, February.
    43. Das, Barun K. & Zaman, Forhad, 2019. "Performance analysis of a PV/Diesel hybrid system for a remote area in Bangladesh: Effects of dispatch strategies, batteries, and generator selection," Energy, Elsevier, vol. 169(C), pages 263-276.
    44. Abdelshafy, Alaaeldin M. & Jurasz, Jakub & Hassan, Hamdy & Mohamed, Abdelfatah M., 2020. "Optimized energy management strategy for grid connected double storage (pumped storage-battery) system powered by renewable energy resources," Energy, Elsevier, vol. 192(C).
    45. Bhatt, Ankit & Sharma, M.P. & Saini, R.P., 2016. "Feasibility and sensitivity analysis of an off-grid micro hydro–photovoltaic–biomass and biogas–diesel–battery hybrid energy system for a remote area in Uttarakhand state, India," Renewable and Sustainable Energy Reviews, Elsevier, vol. 61(C), pages 53-69.
    46. Bagheri, Mehdi & Shirzadi, Navid & Bazdar, Elahe & Kennedy, Christopher A., 2018. "Optimal planning of hybrid renewable energy infrastructure for urban sustainability: Green Vancouver," Renewable and Sustainable Energy Reviews, Elsevier, vol. 95(C), pages 254-264.
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    9. Vaziri Rad, Mohammad Amin & Kasaeian, Alibakhsh & Niu, Xiaofeng & Zhang, Kai & Mahian, Omid, 2023. "Excess electricity problem in off-grid hybrid renewable energy systems: A comprehensive review from challenges to prevalent solutions," Renewable Energy, Elsevier, vol. 212(C), pages 538-560.
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