Thermoeconomic multi-objective optimization of an organic Rankine cycle (ORC) adapted to an existing solid waste power plant

Özahi, Emrah; Tozlu, Alperen; Abuşoğlu, Ayşegül

doi:10.1016/j.enconman.2018.04.103

Cited by 74 publications

(17 citation statements)

References 26 publications

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“…The evaluation of the exhaust gas released due to the combustion of sewage sludge in the FBSSIs for electricity generation with the ORC was discussed partly in only a few published papers in the open literature [33][34][35]. On the other hand, waste heat obtained from WWTP or MSWP integrated into an ORC was extensively studied [36][37][38][39][40].…”

Section: Electricity Production With An Orc Coupled To the Fluidized Bed Sewage Sludge Incineration (Fbssi) Plantmentioning

confidence: 99%

“…The governing thermodynamic and thermoeconomic relations, including economic assumptions used in the FBSSI plant and TS-ORC system analyses, are presented in Table 3 [37][38][39]. The following assumptions are made for the thermodynamic analysis:  All subsystems in the FBSSI plant and TS-ORC system operate in the steady-state conditions.…”

Section: Thermodynamic and Thermoeconomic Relationsmentioning

confidence: 99%

“…The exhaust gas and the air are assumed to be handled with sufficient accuracy by the ideal gas model at all states considered in the analysis. • The heat exchangers' effectiveness is assumed as 0.85, and the isentropic efficiencies of the turbines, compressors and pumps are 0.85 [37]. The Chemical engineering plant cost index (CEPCI) is an essential parameter calculated using the ratio between the cost index of the reference year and the current year and considered in the calculation of facility costs [37].…”

Section: Thermodynamic and Thermoeconomic Relationsmentioning

confidence: 99%

See 2 more Smart Citations

A Two-Stage ORC Integration to an Existing Fluidized Bed Sewage Sludge Incineration Plant for Power Production in the Scope of Waste-to-Energy

Abuşoğlu

Tozlu

Anvari‐Moghaddam

2022

International Journal of Thermodynamics

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This paper presents the design, evaluation, and optimization of an electricity generation system based on the two-stage organic Rankine cycle (TS-ORC), which utilizes the waste heat of an existing fluidized bed sewage sludge incineration (FBSSI) facility. The facility incinerates an average of 300 tons per day of sewage sludge with a dry matter content of 22%. After the drying process, the sewage sludge is burned in a fluidized bed combustor, and exhaust gas at a temperature of about 850-900ºC is released due to the combustion. The system provides the energy required to dry the sludge from this exhaust gas. In this study, a TS-ORC is designed to be coupled to the exhaust gas flowlines discharged to the atmosphere at two different points in the FBSSI plant. The exergy efficiency of the FBSSI facility is found to be 70.5%. Three different working fluids are selected to examine the variations of thermodynamic and thermoeconomic performance parameters of the designed TS-ORC system. The highest power generation in the TS-ORC system (183.40 kW) is achieved using R1234yf as working fluid. R1234yf is also the most expensive fluid for electricity generation among the other working fluids (10.57 $/h). The least electricity generation in the TS-ORC (142.70 kW) occurs at the thermoeconomically most affordable cost with R245fa (9.35 $/h).

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Section: Electricity Production With An Orc Coupled To the Fluidized Bed Sewage Sludge Incineration (Fbssi) Plantmentioning

confidence: 99%

Section: Thermodynamic and Thermoeconomic Relationsmentioning

confidence: 99%

Section: Thermodynamic and Thermoeconomic Relationsmentioning

confidence: 99%

See 1 more Smart Citation

A Two-Stage ORC Integration to an Existing Fluidized Bed Sewage Sludge Incineration Plant for Power Production in the Scope of Waste-to-Energy

Abuşoğlu

Tozlu

Anvari‐Moghaddam

2022

International Journal of Thermodynamics

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“…Then the heat transfer rates, the work, the exergy destructions, and the exergy efficiencies of all sub‐components are evaluated by means of the governing equations related to continuity, energy, and exergy equations. Thus, the energy and exergy efficiencies of each cycle are evaluated 31,32 …”

Section: System Descriptionmentioning

confidence: 99%

Thermodynamic feasibility analysis of a newly modified absorption power cycle running with LiBr‐water

Tozlu

Yosaf

Özcan

2020

Env Prog and Sustain Energy

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This study thermodynamically evaluates a newly modified absorption power cycle (APC) working with Lithium Bromide–Water (LiBr‐H2O) solution and compares it with the conventional Rankine, one‐stage, and three‐stage APC systems. An additional steam condenser is integrated to the conventional APC and part of pure water is extracted and pumped back to the high‐pressure side without passing through the absorber of the cycle. In order to specify the best system parameters, parametric optimization of all configurations is evaluated. The Rankine cycle and the modified APC have better thermodynamic performances than those of the conventional and the three‐stage APC at generator temperatures. The conventional APC is found to improve the cycle performance at low generator pressure. However, the efficiencies of this cycle start to decrease when generator pressure increases. In contrast, the Rankine cycle and the modified APC have larger working ranges of generator pressure.

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“…Uusitalo et al [10] investigated the impacts of working fluid type and critical properties on ORC system design and concluded that fluorocarbons and low critical temperature hydrocarbons are more suitable for low-temperature ORC applications, while siloxanes and high critical temperature hydrocarbons are more suitable for high-temperature ORC applications. Özahi et al [11] conducted a thermodynamic and thermoeconomic study of an ORC system. Multi-objective optimization of the cycle was carried out with four working fluids, and they found that toluene is the best working fluid, producing 9.76% additional power for the solid waste power plant.…”

Section: Introductionmentioning

confidence: 99%

An Improved Analysis Method for Organic Rankine Cycles Based on Radial-Inflow Turbine Efficiency Prediction

Han

Jia

et al. 2018

Applied Sciences

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The organic Rankine cycle (ORC) has been demonstrated to be an effective method for converting low-grade heat energy into electricity. This paper proposes an improved analysis method for the ORC system. A coupling model of the ORC system with a radial-inflow turbine efficiency prediction model is presented. Multi-objective optimization was conducted for a constant turbine efficiency ORC system (ORCCTE) and a predicted turbine efficiency ORC system (ORCDTE), and the optimization results were compared. Additionally, a sensitivity analysis was conducted with respect to the heat source temperature and the ambient temperature. It can be found that the predicted turbine efficiency decreases with the increasing evaporation temperature, and increases with the increasing condensation temperature. The turbine efficiency is not constant and it varies with operating conditions. The distribution of the Pareto frontier for ORCCTE system and ORCCTE system is different. Compared with the ORCCTE system, the ORCDTE system has a lower optimal evaporation temperature, but a higher optimal condensation temperature. The deviation between the predicted turbine efficiency and the constant turbine efficiency increases with the increasing heat source temperature but decreases with the increasing ambient temperature. Thus, the difference in the theoretical analysis results between ORCCTE system and ORCDTE system increases with the increasing heat source temperature but decreases with the increasing ambient temperature.

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Thermoeconomic multi-objective optimization of an organic Rankine cycle (ORC) adapted to an existing solid waste power plant

Cited by 74 publications

References 26 publications

A Two-Stage ORC Integration to an Existing Fluidized Bed Sewage Sludge Incineration Plant for Power Production in the Scope of Waste-to-Energy

A Two-Stage ORC Integration to an Existing Fluidized Bed Sewage Sludge Incineration Plant for Power Production in the Scope of Waste-to-Energy

Thermodynamic feasibility analysis of a newly modified absorption power cycle running with LiBr‐water

An Improved Analysis Method for Organic Rankine Cycles Based on Radial-Inflow Turbine Efficiency Prediction

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