Sürdürülebilir Kalkınma Amaçları

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Yazarlar

• Tozlu, Alperen(2)
• Bilen, Kadir(1)
• Kayabasi, Erhan(1)
• Ozcan, Hasan(1)
• Topcu, Muhammed Taha(1)

• MakaleAçık Erişim2025Scopus SJRQ1/r/bayburt/14346
  Energy, exergy and economic optimization application of integrated dual-loop organic rankine cycle: A case of shopping mall power plant

  Topcu, Muhammed Taha; Tozlu, Alperen; Bilen, Kadir

  This paper presents a thermoeconomic analysis of the Dual-Loop Organic Rankine Cycle (DORC) integrated into the Erzurum Mall Power Plant (EMPP). The DORC system is designed to utilize waste heat at 425 degrees C and 9 kg/s, producing additional power for the existing plant. The integration of dual-loop ORC systems with different critical temperature fluids into an operational facility is analyzed. High-temperature cycles use working fluids such as Toluene, MDM (octamethylcyclotrisiloxane), n-Nonane, and n-Octane, while refrigerants R236fa, R600a, and R124 are employed in the low-temperature cycles. The designed model demonstrates that up to 11.4 % of the plant's existing capacity can be added as extra power. The Toluene/R600a combination is identified as the best fluid pair, delivering the highest total net power output (653.4 kW), the lowest total cost rate (19.18 $/h), and the highest exergy efficiency (20.18 %). Optimization of the DORC system is performed using the NSGA-II in MATLAB. For the toluene/R600a pair, the optimization results show an increase of 13.52 % in the net power output and decrease of 1.48 % in the total cost rate, which is a significant improvement over the initial results.

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  AtıfWoS3·OpenAlex1

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• MakaleAçık Erişim2022Scopus SJRQ1/r/bayburt/11932
  Thermoeconomic analysis of a low-temperature waste-energy assisted power and hydrogen plant at off-NG grid region

  Tozlu, Alperen; Kayabasi, Erhan; Ozcan, Hasan

  In this study, thermoeconomic analysis of a CO2 power cycle and PEM hydrogen system using ultra-low temperature waste heat from a milk production facility is conducted. In the transcritical CO2 cycle, low-temperature LNG evaporation is used for cooling the condenser to increase the temperature difference enabling low temperature waste heat use. In addition, a PEM electrolyzer produces hydrogen to reduce the LNG requirement at the plant. A CO2-water exchanger has been designed to recover the pasteurized water's excess heat and evaporate the CO2 using Simcenter-Flomaster software. The inlet mass flow rates and outlet temperatures of the heat exchanger were optimized by performing thermoecomic analysis, and the thermal and economic performance of the facility was examined. The power cycle has 14% higher efficiency when LNG is used as the heat sink compared to ambient temperature condensation with an electricity production cost range at 0.05–0.11 $/kWh, and the hydrogen generation cost is between $2.6–5.20 kg−1. It is found that the plant could only be economically feasible when less than 50% of the power produced is used for hydrogen generation. Consequently, the proposed system can co-generate power and on-demand hydrogen in off-NG grid regions with reasonable investment and product costs.

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  AtıfScopus6·WoS6·OpenAlex8

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