TY  - JOUR
AU  - Ayub, Hafiz Muhammad Uzair
AU  - Alnouri, Sabla Y.
AU  - Stijepović, Mirko
AU  - Stijepović, Vladimir
AU  - Hussein, Ibnelwaleed A.
PY  - 2024-06
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/7449
AB  - Energy systems are undergoing rapid change as the world responds to climate change. Many policymakers may ask, what will be the next great energy source for a low-carbon future? All indications so far point to hydrogen energy. Although it is anticipated that costs will likely fall as the hydrogen production scale increases, it may be reported that the high technology costs remain a barrier to the widespread shift towards hydrogen. This paper presents hydrogen production costs for various production methods for different regions across the world, including the USA, the Middle East, Europe, India, and Canada. The costs of hydrogen production from biomass gasification, coal gasification, and natural gas reforming are compared, revealing the varying costs across different regions. Moreover, the production of green hydrogen from renewable energy sources is also presented, and compared with conventional methods. It highlights that while green hydrogen is environmentally sustainable, its production remains cost-intensive compared to integrated processes. Notably, the Middle East and India demonstrate the most economical production costs for both electrolysis and nuclear-based processes, while Europe shows the highest costs. The information presented in this paper could be helpful for researchers and policymakers to make informed decisions regarding the necessary aspects that still need to be investigated, to help with the transition into a hydrogen energy future.
PB  - Institution of Chemical Engineers
T2  - Process Safety and Environmental Protection
T1  - A cost comparison study for hydrogen production between conventional and renewable methods
EP  - 932
SP  - 921
VL  - 186
DO  - 10.1016/j.psep.2024.04.080
ER  - 

@article{
author = "Ayub, Hafiz Muhammad Uzair and Alnouri, Sabla Y. and Stijepović, Mirko and Stijepović, Vladimir and Hussein, Ibnelwaleed A.",
year = "2024-06",
abstract = "Energy systems are undergoing rapid change as the world responds to climate change. Many policymakers may ask, what will be the next great energy source for a low-carbon future? All indications so far point to hydrogen energy. Although it is anticipated that costs will likely fall as the hydrogen production scale increases, it may be reported that the high technology costs remain a barrier to the widespread shift towards hydrogen. This paper presents hydrogen production costs for various production methods for different regions across the world, including the USA, the Middle East, Europe, India, and Canada. The costs of hydrogen production from biomass gasification, coal gasification, and natural gas reforming are compared, revealing the varying costs across different regions. Moreover, the production of green hydrogen from renewable energy sources is also presented, and compared with conventional methods. It highlights that while green hydrogen is environmentally sustainable, its production remains cost-intensive compared to integrated processes. Notably, the Middle East and India demonstrate the most economical production costs for both electrolysis and nuclear-based processes, while Europe shows the highest costs. The information presented in this paper could be helpful for researchers and policymakers to make informed decisions regarding the necessary aspects that still need to be investigated, to help with the transition into a hydrogen energy future.",
publisher = "Institution of Chemical Engineers",
journal = "Process Safety and Environmental Protection",
title = "A cost comparison study for hydrogen production between conventional and renewable methods",
pages = "932-921",
volume = "186",
doi = "10.1016/j.psep.2024.04.080"
}

Ayub, H. M. U., Alnouri, S. Y., Stijepović, M., Stijepović, V.,& Hussein, I. A.. (2024-06). A cost comparison study for hydrogen production between conventional and renewable methods. in Process Safety and Environmental Protection
Institution of Chemical Engineers., 186, 921-932.
https://doi.org/10.1016/j.psep.2024.04.080

Ayub HMU, Alnouri SY, Stijepović M, Stijepović V, Hussein IA. A cost comparison study for hydrogen production between conventional and renewable methods. in Process Safety and Environmental Protection. 2024;186:921-932.
doi:10.1016/j.psep.2024.04.080 .

Ayub, Hafiz Muhammad Uzair, Alnouri, Sabla Y., Stijepović, Mirko, Stijepović, Vladimir, Hussein, Ibnelwaleed A., "A cost comparison study for hydrogen production between conventional and renewable methods" in Process Safety and Environmental Protection, 186 (2024-06):921-932,
https://doi.org/10.1016/j.psep.2024.04.080 . .

TY  - JOUR
AU  - Klaimi, Rachid
AU  - Alnouri, Sabla Y.
AU  - Stijepović, Mirko
PY  - 2022
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5198
AB  - This work presents a novel Mixed-Integer Non-linear Program (MINLP) that accounts for the presence of multiple fuels in tri-generation systems. The key novelty of this work pertains to the use of hybrid energy systems in tri-generation processes, which are associated with multiple energy sources. In this work, different fuel sources such as natural gas, biomass and municipal solid waste (MSW) have been considered in the model, together with concentrated solar power (CSP), as a renewable energy option. The use of the aforementioned energy sources in tri-generation systems for heat, power and water production, were assessed simultaneously by the proposed model. CSP was utilized as the sole renewable energy option, due to the ease of obtaining both heat and power from such systems. The design of optimal tri-generation systems has been studied using the proposed model, under different conditions for carbon reduction. The model has been formulated using multi-period considerations, so as to account for seasonal variations. Moreover, the effect of several different operating parameters on the land use requirements of such systems were also investigated. The results indicate that despite the high cost of CSP, it was still found to be a highly desirable choice in the presence of carbon taxation. The water production cost of a hybrid natural gas-CSP tri-generation system was estimated at 1.277 USD/m3. This value could be 16% higher in the presence of carbon taxation. Additionally, biomass and solid waste options were found to be very promising energy outlets for desalination, especially in winter and fall seasons which have the lowest DNI values. The selection of these energy streams is also highly affected by the presence of carbon taxation policy. On the other hand, the incorporation of these two energy streams along with CSP could result in a fully local energy independent system with a water production cost of 1.44 and 1.537 USD/m3, respectively.
PB  - Elsevier Ltd
T2  - Energy
T1  - Investigation of seasonal variations and multiple fuel options in a novel tri-generation CSP integrated hybrid energy process
SP  - 125338
VL  - 261
DO  - 10.1016/j.energy.2022.125338
ER  - 

@article{
author = "Klaimi, Rachid and Alnouri, Sabla Y. and Stijepović, Mirko",
year = "2022",
abstract = "This work presents a novel Mixed-Integer Non-linear Program (MINLP) that accounts for the presence of multiple fuels in tri-generation systems. The key novelty of this work pertains to the use of hybrid energy systems in tri-generation processes, which are associated with multiple energy sources. In this work, different fuel sources such as natural gas, biomass and municipal solid waste (MSW) have been considered in the model, together with concentrated solar power (CSP), as a renewable energy option. The use of the aforementioned energy sources in tri-generation systems for heat, power and water production, were assessed simultaneously by the proposed model. CSP was utilized as the sole renewable energy option, due to the ease of obtaining both heat and power from such systems. The design of optimal tri-generation systems has been studied using the proposed model, under different conditions for carbon reduction. The model has been formulated using multi-period considerations, so as to account for seasonal variations. Moreover, the effect of several different operating parameters on the land use requirements of such systems were also investigated. The results indicate that despite the high cost of CSP, it was still found to be a highly desirable choice in the presence of carbon taxation. The water production cost of a hybrid natural gas-CSP tri-generation system was estimated at 1.277 USD/m3. This value could be 16% higher in the presence of carbon taxation. Additionally, biomass and solid waste options were found to be very promising energy outlets for desalination, especially in winter and fall seasons which have the lowest DNI values. The selection of these energy streams is also highly affected by the presence of carbon taxation policy. On the other hand, the incorporation of these two energy streams along with CSP could result in a fully local energy independent system with a water production cost of 1.44 and 1.537 USD/m3, respectively.",
publisher = "Elsevier Ltd",
journal = "Energy",
title = "Investigation of seasonal variations and multiple fuel options in a novel tri-generation CSP integrated hybrid energy process",
pages = "125338",
volume = "261",
doi = "10.1016/j.energy.2022.125338"
}

Klaimi, R., Alnouri, S. Y.,& Stijepović, M.. (2022). Investigation of seasonal variations and multiple fuel options in a novel tri-generation CSP integrated hybrid energy process. in Energy
Elsevier Ltd., 261, 125338.
https://doi.org/10.1016/j.energy.2022.125338

Klaimi R, Alnouri SY, Stijepović M. Investigation of seasonal variations and multiple fuel options in a novel tri-generation CSP integrated hybrid energy process. in Energy. 2022;261:125338.
doi:10.1016/j.energy.2022.125338 .

Klaimi, Rachid, Alnouri, Sabla Y., Stijepović, Mirko, "Investigation of seasonal variations and multiple fuel options in a novel tri-generation CSP integrated hybrid energy process" in Energy, 261 (2022):125338,
https://doi.org/10.1016/j.energy.2022.125338 . .

TY  - JOUR
AU  - Klaimi, Rachid
AU  - Alnouri, Sabla Y.
AU  - Stijepović, Mirko
PY  - 2021
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4834
AB  - In this work, a concentrated solar power (CSP) tri-generation system that is capable of the simultaneous production of steam, power and freshwater is introduced. The abundantly available direct normal irradiance can potentially allow concentrated solar power systems to become major energy contributors in the desalination market. Since CSPs can generate both thermal and electrical energy, they have been found to be excellent candidates for sustainable operation of large scale desalination systems, in the long term. This paper presents a mathematical model in the form of a Mixed-Integer Nonlinear program (MINLP), which involves a tri-generation system for combined steam and power production, primarily using solar energy to operate steam turbines. Moreover, the option of freshwater production using various desalination technology choices, such as reverse osmosis (RO) and multi-stage flashing (MSF), is also accounted for within the model. Hence, the proposed model offers a very convenient and eco-friendly tri-generation route for steam, power and water production. The proposed systematic method was tested using different feedwater salinities, as well as using different product water flowrates, and electricity prices. According to the results obtained, the water production cost (WPC) associated with a water salinity of 25 g/L resulted in a value of 1.83 USD/m3, which is significantly lower than the WPCs obtained at 35 g/L (2.09 USD/m3) and 45 g/L (2.24 USD/m3). Moreover, a large scale tri-generation system with an overall production capacity of 100,000 m3/d of freshwater resulted in a 60% reduction of the attained WPC value, when compared against a small scale system with a production capacity of 10,000 m3/d of freshwater. The option of exporting electrical energy to the grid using the proposed tri-generation system was also investigated, and a sensitivity analysis was conducted by varying the price of electrical energy. The attained breakeven energy prices were 0.74, 0.79 and 0.82 cent/kWh at 25, 35 and 45 g/L of feedwater salinity, respectively.
T2  - Energy Conversion and Management
T1  - Design and thermo-economic evaluation of an integrated concentrated solar power-Desalination tri-generation system
VL  - 249
DO  - 10.1016/j.enconman.2021.114865
ER  - 

@article{
author = "Klaimi, Rachid and Alnouri, Sabla Y. and Stijepović, Mirko",
year = "2021",
abstract = "In this work, a concentrated solar power (CSP) tri-generation system that is capable of the simultaneous production of steam, power and freshwater is introduced. The abundantly available direct normal irradiance can potentially allow concentrated solar power systems to become major energy contributors in the desalination market. Since CSPs can generate both thermal and electrical energy, they have been found to be excellent candidates for sustainable operation of large scale desalination systems, in the long term. This paper presents a mathematical model in the form of a Mixed-Integer Nonlinear program (MINLP), which involves a tri-generation system for combined steam and power production, primarily using solar energy to operate steam turbines. Moreover, the option of freshwater production using various desalination technology choices, such as reverse osmosis (RO) and multi-stage flashing (MSF), is also accounted for within the model. Hence, the proposed model offers a very convenient and eco-friendly tri-generation route for steam, power and water production. The proposed systematic method was tested using different feedwater salinities, as well as using different product water flowrates, and electricity prices. According to the results obtained, the water production cost (WPC) associated with a water salinity of 25 g/L resulted in a value of 1.83 USD/m3, which is significantly lower than the WPCs obtained at 35 g/L (2.09 USD/m3) and 45 g/L (2.24 USD/m3). Moreover, a large scale tri-generation system with an overall production capacity of 100,000 m3/d of freshwater resulted in a 60% reduction of the attained WPC value, when compared against a small scale system with a production capacity of 10,000 m3/d of freshwater. The option of exporting electrical energy to the grid using the proposed tri-generation system was also investigated, and a sensitivity analysis was conducted by varying the price of electrical energy. The attained breakeven energy prices were 0.74, 0.79 and 0.82 cent/kWh at 25, 35 and 45 g/L of feedwater salinity, respectively.",
journal = "Energy Conversion and Management",
title = "Design and thermo-economic evaluation of an integrated concentrated solar power-Desalination tri-generation system",
volume = "249",
doi = "10.1016/j.enconman.2021.114865"
}

Klaimi, R., Alnouri, S. Y.,& Stijepović, M.. (2021). Design and thermo-economic evaluation of an integrated concentrated solar power-Desalination tri-generation system. in Energy Conversion and Management, 249.
https://doi.org/10.1016/j.enconman.2021.114865

Klaimi R, Alnouri SY, Stijepović M. Design and thermo-economic evaluation of an integrated concentrated solar power-Desalination tri-generation system. in Energy Conversion and Management. 2021;249.
doi:10.1016/j.enconman.2021.114865 .

Klaimi, Rachid, Alnouri, Sabla Y., Stijepović, Mirko, "Design and thermo-economic evaluation of an integrated concentrated solar power-Desalination tri-generation system" in Energy Conversion and Management, 249 (2021),
https://doi.org/10.1016/j.enconman.2021.114865 . .

TY  - JOUR
AU  - Alnouri, Sabla Y.
AU  - Kijevčanin, Mirjana
AU  - Stijepović, Mirko
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4760
AB  - This paper utilizes a stochastic optimization approach using genetic algorithms, for conducting rigorous pipe size sensitivity assessments onto the design of pressure relief networks. By sampling high performance candidates, only the finest options can survive. The pressure relief network system that was investigated in this work was previously reported in literature. The problem is constrained and involves minimizing a cost objective function that evaluates the overall network performance, in which the best pipe size combination should be selected for each segment within the network. The overall goal of this paper was to seek cost-effective designs for the pressure relief piping system by exploring different ranges of pipe diameters that are available for each segment in the network and comparing how the overall design of the system is affected, when the number of pipe size options to select from is varied.
T2  - Hemijska industrija
T1  - Pipe size sensitivity in pressure relief networks using genetic algorithms
EP  - 364
IS  - 6
SP  - 351
VL  - 74
DO  - 10.2298/HEMIND200709032A
ER  - 

@article{
author = "Alnouri, Sabla Y. and Kijevčanin, Mirjana and Stijepović, Mirko",
year = "2020",
abstract = "This paper utilizes a stochastic optimization approach using genetic algorithms, for conducting rigorous pipe size sensitivity assessments onto the design of pressure relief networks. By sampling high performance candidates, only the finest options can survive. The pressure relief network system that was investigated in this work was previously reported in literature. The problem is constrained and involves minimizing a cost objective function that evaluates the overall network performance, in which the best pipe size combination should be selected for each segment within the network. The overall goal of this paper was to seek cost-effective designs for the pressure relief piping system by exploring different ranges of pipe diameters that are available for each segment in the network and comparing how the overall design of the system is affected, when the number of pipe size options to select from is varied.",
journal = "Hemijska industrija",
title = "Pipe size sensitivity in pressure relief networks using genetic algorithms",
pages = "364-351",
number = "6",
volume = "74",
doi = "10.2298/HEMIND200709032A"
}

Alnouri, S. Y., Kijevčanin, M.,& Stijepović, M.. (2020). Pipe size sensitivity in pressure relief networks using genetic algorithms. in Hemijska industrija, 74(6), 351-364.
https://doi.org/10.2298/HEMIND200709032A

Alnouri SY, Kijevčanin M, Stijepović M. Pipe size sensitivity in pressure relief networks using genetic algorithms. in Hemijska industrija. 2020;74(6):351-364.
doi:10.2298/HEMIND200709032A .

Alnouri, Sabla Y., Kijevčanin, Mirjana, Stijepović, Mirko, "Pipe size sensitivity in pressure relief networks using genetic algorithms" in Hemijska industrija, 74, no. 6 (2020):351-364,
https://doi.org/10.2298/HEMIND200709032A . .