Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

Browse

Filters

2022 - 20235

Settings

Access Right: Embargoed AccessInstitution Author: search.filters.institutionAuthor.Mohammadpourfard, Mousa

Search Results

Now showing 1 - 5 of 5
  • Article
    Citation - WoS: 29
    Citation - Scopus: 33
    The Effect of Heat Transfer Characteristics of Macromolecule Fouling on Heat Exchanger Surface: a Dynamic Simulation Study
    (Wiley, 2023) Karimi Shoar, Zahra; Pourpasha, Hadi; Zeinali Heris, Saeed; Mousavi, Seyed Borhan; Mohammadpourfard, Mousa
    At the city gate gas pressure reduction stations (CGSs), to prevent natural gas from forming a hydrate in the throttle valve, the natural gas is heated by the heater before reaching the pressure relief valve. Heat exchangers are an essential component of industrial processes that contribute significantly to total system energy. Since the element impacting heat exchanger performance is the fouling process, all fouling processes and models were dynamically simulated in this study. Through coding in the C++ language and simultaneous use of fluent functions, or, in other words, user-defined function (UDF), fouling-related models were defined for this software. The dynamic simulation was performed, and parameters such as fouling strength and layer thickness were calculated. The effects of changing operating conditions, such as gas inlet velocity, surface temperature, and fouling species concentration on fouling growth, were also evaluated. As the concentration of fouling species increased, the fouling rate also increased. The amount of supersaturation and fouling rate increased as the surface temperature increased. Due to the operational limitations of the system, to reduce the fouling rate, the gas inlet velocity should be as high as possible, and the fluid inlet temperature, surface temperature, and concentration of fouling species should be as low as possible. In this study, the required time to reach the efficiency of 70% of the heat exchanger was calculated using the modelling of this chamber, which was equivalent to 190 days. Additionally, the critical thickness of the fouling layer at this time was 3.5 cm.
  • Article
    Citation - WoS: 26
    Citation - Scopus: 25
    Biomass Driven Polygeneration Systems: a Review of Recent Progress and Future Prospects
    (Elsevier, 2023) Tabriz, Zahra Hajimohammadi; Khani, Leyla; Mohammadpourfard, Mousa; Gökçen Akkurt, Gülden
    Biomass is the most widely used renewable energy source which is highly appreciated due to its high availability and non-intermittent nature. Considering problems such as reduction of fossil fuels, global warming, and emission of greenhouse gases, lack of attention to the existing situation may cause irreversible damage to the future of the planet. In addition to using renewable energy sources, improving the efficiency of systems will also be helpful. Polygeneration systems play an important role in increasing efficiency and reducing pollution. So, the use of biomass in polygeneration systems seems to be a great approach for sustainable development. Recent studies on biomass-based polygeneration systems have focused on how to use biomass and integrate diverse subsystems to achieve the best performance from energy and exergy viewpoints. The present paper reviews biomass-based systems, and the parameters affecting the performance of these systems. The literature review shows that the high exergy destruction rate in the gasifiers is the most frequent problem among recent articles. In addition, despite the advantages of anaerobic digestion process, the number of studies conducted on the use of this method for biomass conversion is small. In the end, results, limitations, and future outlooks of these systems are discussed.
  • Article
    Citation - WoS: 20
    Citation - Scopus: 18
    Optimization of the Integrated Orc and Carbon Capture Units Coupled To the Refinery Furnace With the Rsm-Bbd Method
    (Elsevier, 2022) Nazerifard, Reza; Mohammadpourfard, Mousa; Heris, Saeed Zeinali
    To recover waste heat and reduce the CO2 emissions into the atmosphere, an integrated system of organic Rankine cycle and post-combustion carbon capture unit coupled with furnaces of a refinery located in Tabriz, East Azerbaijan, Iran has been presented. To assess the performances of the proposed system, thermodynamic and economic analyses are performed. The organic Rankine cycle was optimized by selecting the suitable working fluid with optimal operating conditions among the primary considered ones through multi-objective optimization. Then, the response surface methodology combined with the Box-Behnken design was employed to evaluate the effects of decision variables and their interaction on the CO2 capture cost and attain the optimal conditions. The results indicate that the R-245fa is the best working fluids among the selected ones. According to the results, the flue gas inlet temperature into the absorber and lean loading are the terms of the model that have a significant impact on the output response. In the optimum setting of the decision variables, the CO2 capture cost equals 81.60 $/tCO2 and 81.90 $/tCO2 for ORC+CC and DCC+CC processes, respectively. Furthermore, due to the absence of a turbine in the DCC+CC system, its equivalent work is 28 % higher than the ORC+CC system. Also, the amine regeneration energy is responsible for 91.47 % and 86.15 % of the variable operating cost of the optimal ORC+CC and optimal DCC+CC, respectively.
  • Article
    Citation - WoS: 9
    Citation - Scopus: 10
    Energy and Exergy Analysis of Combined Power, Methanol, and Light Olefin Generation System Fed With Shale Gas
    (Elsevier, 2022) Khani, Leyla; Tabriz, Zahra Hajimohammadi; Mohammadpourfard, Mousa; Gökçen Akkurt, Gülden
    Environmental problems and limitations of fossil fuel resources, especially crude oil, have intensified the importance of using cleaner and cheaper fuels besides enhancing energy conversion processes. Therefore, a novel power, methanol, and light olefin multi-generation system is designed and modeled in this paper. Chemical looping reforming, chemical looping combustion cycles, and Rankine power system are combined with methanol and light olefin production processes. The input fuel of the system is shale gas. The mass, energy, and exergy balance equations are applied for each system unit as a steady-state control volume to assess its thermodynamic operation. Then, the effects on the system performance of critical parameters are studied comprehensively. The results show that the necessary syngas can be supplied when 71.5% of the inlet shale gas is used in the steam reforming reactor of the chemical looping reforming cycle, and the steam to fuel ratio and carbon dioxide to fuel ratio are 0.61. Furthermore, if 31% of the produced methanol is consumed in the olefin production unit, the system energy and exergy efficiencies are achieved at 67.3% and 71.5%, respectively. In this case, the carbon dioxide flow rate is 800 kmol/hr, separated and stored in the chemical looping combustion cycle, leading to a clean thermodynamic system.
  • Article
    Citation - WoS: 71
    Citation - Scopus: 78
    Investigation of H2o2/Uv Advanced Oxidation Process on the Removal Rate of Coliforms From the Industrial Effluent: a Pilot-Scale Study
    (Elsevier, 2022) Ashrafivala, Meisam; Mousavi, Seyed Borhan; Zeinali Heris, Saeed; Heidari, Mohammad; Mohammadpourfard, Mousa; Aslani, Hassan
    Wastewater recycling and reuse is very important, specially in countries with water shortage problem. Disinfection is very crucial step of wastewater treatment, particulary from the reuse and environmental protection point of view. In this research, the efficiency of the advanced oxidation process using UV and H2O2 combination was investigated on fecal coliform (FC) inactivation from a real industrial effluent; furthermore, the optimal condition for disinfection of the effluent using various parameters such as pH, H2O2 concentration, and contact time was determined. Based on the acquired outcomes, by pH decline from 11 to 7 and 3 inactivation rate increased (6.7% and 20.9%, sequentially), indicating the efficacy of acidic condition on the process. Increasing H2O2 concentration from 5 mg/L to 15 mg/L, 25 mg/L, and 35 mg/L, was led to increase FC inactivation by 16.6%, 29.75%, and 36.33%, respectively. Considering contcat time impact on the process performance, our findings revealed that the best efficiency obtained after 40 (s) contact time. It can be concluded that the combined UV/H2O2 is more potent than single UV and H2O2 process, making it possible to reach irrigation standards.