Thermodynamic assessment of combined supercritical CO2 cycle power systems with organic Rankine cycle or Kalina cycle

Zhu, Huaitao; Xie, Gongnan; Yuan, Han; Nižetić, Sandro

doi:10.1016/j.seta.2022.102166

Cited by 24 publications

(5 citation statements)

References 25 publications

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“…Solution flows to condenser (17) via LTR (16)(17). Condensing liquid (26)(27) extracts heat to ensure saturated liquid phase (18). Pump pressurizes liquid (19) to turbine inlet pressure with no pressure loss.…”

Section: Heat Sourcementioning

confidence: 99%

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Energy, exergy, sustainability, and economic analysis of a waste heat recovery for a heavy fuel oil-based power plant using Kalina cycle integrated with Rankine cycle

Rahman,

Bandhan,

Husna

et al. 2024

Preprint

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In this study, a comparative analysis of the thermodynamic, exergy, economic, and environmental aspects of high-temperature Kalina cycle and the Rankine cycle integrated with the Kalina cycle has been investigated. The Kalina cycle either stand-alone or in combination with the Rankine cycle is examined using the diesel engine waste heat from the Katakhali 50 MW HFO-based peaking powerplant, Bangladesh as the heat source. EBSILON Professional software is used for simulation and finding out various state conditions of the cycle, whereas the engineering equation solver (EES) is used for parametric analysis. Results from this analysis indicate that a combined cycle can provide 348 kW more power output at an electricity cost of only 0.0175 $/kWh than stand-alone Kalina cycle. The combined cycle produces around 4075 kW with 27% and 59% as energy and exergy efficiencies, respectively. Meanwhile, the stand-alone cycle offers 3725 kW with 25% and 54% energy and exergy efficiencies. Economic analysis results show that the combined cycle involves capital costs of approximately $370,000 lower than the stand-alone Kalina cycle, primarily due to its high energy conversion. The payback period for the combined cycle is 1.94 years whereas 2.41 years for the stand-alone cycle. In addition, the combined cycle is almost 60% more environmentally sustainable. The best operating condition for the suggested configurations is set by parametric analysis to determine the high output power with low electricity cost. Finally, it can be concluded that the proposed model can be an effective combined model to generate power by recovering waste heat for the power plants operating in Bangladesh.

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Section: Heat Sourcementioning

confidence: 99%

“…Internal heat recovery occurs due to high fluid temperature at the turbine exit.Heat recovery device captures heat from expanded fluid(15) diluted by mixing with weak solution(4) at LP to avoid condensing issues. Strong solution is pumped(17)(18) from LP to IP and separated into condenser(19) and LTR-2(20). LTR-2 heats liquid-vapor mixture for heat recovery.…”

mentioning

confidence: 99%

Energy, exergy, sustainability, and economic analysis of a waste heat recovery for a heavy fuel oil-based power plant using Kalina cycle integrated with Rankine cycle

Rahman,

Bandhan,

Husna

et al. 2024

Preprint

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“…It was also suggested to conduct more research on the sCO 2 as waste heat working fluid in combined cycles. Recently, Zhu et al [20] proposed two novel combined cycles consisting sCO 2 Brayton cycle and the ORC/Kalina cycle to utilize waste heat. In comparison results they found that using R32 and ammonia, the sCO 2 Brayton cycle/ORC performed thermodynamically best as compared to the sCO 2 Brayton cycle/Kalina cycle.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of combined cycles for concentrated solar power for efficient power generation using low Global Warming Potential (GWP) fluids to reduce environmental effects

Khan,

Caliskan,

Hong

2023

IET Renewable Power Gen

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A comparative analysis of a combined system comprising organic Rankine cycles (ORC) and supercritical CO2 (sCO2) cycles for concentrated solar power (CSP) applications was performed in the article. Low global warming potential (GWP) fluids were used to investigate strategies for reducing the effects on global warming. In the current study, four different combinations of the sCO2 cycles and ORC, including basic recuperated, pre‐compression, recompression with main compressor intercooling, and partial cooling, were taken into consideration, and their performances with regard to CSP application were compared. The integrated recompression with main compressor intercooling and ORC arrangement was seen to operate thermodynamically more efficient than the other considered configurations. This configuration's highest thermal and exergy efficiencies were discovered to be 51.9% and 55.84%, respectively, and R1243zf was found to be the best‐performing fluid among other considered low GWP fluids to reduce the environmental effects.

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“…Zhang and Li [25] conclude that the cycle's thermodynamic performance can be improved by connecting the regenerator and the evaporator in series. Zhu et al [26] studied the performance improvement of Brayton S-CO 2 combinations as working substances of the organic Rankine (ORC) and Kalina cycles. The efficiency and volumetric flow rate ratio were used as a system performance study parameter to evaluate the combined cycle's balance between economy and compactness.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic Performance of a Cogeneration Plant Driven by Waste Heat from Cement Kilns Exhaust Gases

et al. 2023

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The dwindling and scarcity of fossil energy sources is the basis of the energy transition, where renewable resources are increasingly valued. The purpose of the cogeneration system studied in this article is to recover the residual heat from the gases coming out of the chimneys of the cement kilns, to produce at the same time the electricity and the heat required for offices and residential houses of cement workers. Cement kilns are reputed to be energy-intensive, generating excessive heat losses. These heat losses are found mainly in the conduction–convective and radiative modes, representing about 26% of the overall heat input to the system. Nevertheless, the gases at the chimney outlet can still have temperatures between 250 and 350 °C, which presents a non-negligible potential for a cogeneration system. This study compares the thermal performance of different cogeneration plant configurations (KCA, KCB, and KCC systems) using the Kalina cycle to determine the best one. Several assumptions were made to reduce the complexity of the model. MATLAB and Excel software were used to solve the system of equations. After extensive analysis of the results, the KCA system showed the best performance, compared to the KCB and KCC systems, with a thermal efficiency of 22.15%, an exergy efficiency of 45.12%, and a net electrical capacity of 2565.03 kWe. Model sensitivity to concentration, temperature, and pressure variations also gave the KCA system the best-performing system. Evaluation of the excess heat flux removed from the process yields values of 7368.20 kW, 7421.86 kW, and 8094.15 kW for the KCA, KCB, and KCC systems. The results of this article serve as a decision support tool for installing the cogeneration system via the Kalina cycle in cement installations.

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Thermodynamic assessment of combined supercritical CO2 cycle power systems with organic Rankine cycle or Kalina cycle

Cited by 24 publications

References 25 publications

Energy, exergy, sustainability, and economic analysis of a waste heat recovery for a heavy fuel oil-based power plant using Kalina cycle integrated with Rankine cycle

Energy, exergy, sustainability, and economic analysis of a waste heat recovery for a heavy fuel oil-based power plant using Kalina cycle integrated with Rankine cycle

A comparative study of combined cycles for concentrated solar power for efficient power generation using low Global Warming Potential (GWP) fluids to reduce environmental effects

Thermodynamic Performance of a Cogeneration Plant Driven by Waste Heat from Cement Kilns Exhaust Gases

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