Techno-economic optimization of ORC system structure, size and working fluid within biomass-fired municipal cogeneration plant retrofitting project

Świerzewski, Mateusz; Kalina, Jacek; Musiał, Arkadiusz

doi:10.1016/j.renene.2021.08.068

Cited by 26 publications

(6 citation statements)

References 20 publications

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“…A 660-MW ultra-supercritical double-reheat coal-fired unit in service in China is selected as the traditional coal-fired unit part, and the system is simulated using EBSILON software, which is commonly applied for the simulation of different thermodynamic cycles (Soares et al, 2021;Wang et al, 2021;Świerzewski et al, 2021). The simulation results of the coal-fired power generation system under 100% THA load (turbine heat acceptance), 75% THA load, and 50% THA load show strong agreements with the design values, which have been validated in the previous study (Jiang et al, 2022).…”

Section: Tsacpg System Descriptionmentioning

confidence: 99%

A study on a novel solar contribution evaluation method for the solar-aided coal-fired power generation system

Jiang

Duan²,

Tong³

et al. 2022

Front. Energy Res.

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Solar-aided coal-fired power generation (SACPG) technology is an effective method of solar energy utilization. It could balance the demand of carbon dioxide emission reduction and renewable energy efficient power generation and promote carbon peaking and carbon neutralization. Accurate analysis of the share of solar energy in the unit output power could benefit the selection of the best integration scheme and exploitation of solar energy for further research. A novel solar contribution evaluation method of an SACPG system is put forward. The exergy is taken as the evaluation benchmark, and the method can be applied in an SACPG system with multiple integration positions with solar energy. The solar energy input from different positions in the system is analyzed separately. The solar energy input positions and the impact of solar exergy destruction on the solar energy contribution are considered. The proposed method also analyzes the flow direction and destruction of each solar exergy in different parts of the SACPG system and expresses the solar contribution in the electricity generated by each stage steam turbine in the form of a theoretical formula. Ultimately, the solar exergy contribution in the whole SACPG system is calculated by accumulating each result. Furthermore, the new method is applied to a tower solar-aided coal-fired power generation (TSACPG) system with thermal energy storage (TES) for comparative analysis. Compared with other solar contribution evaluation methods, the comprehensiveness and accuracy of the novel method are analyzed. Meanwhile, the exergy destruction distributions of the TSACPG system are revealed. The method can also be further used to excavate the application potential of solar energy in coal-fired units and provide theoretical support for highly efficient utilization of solar energy.

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Section: Tsacpg System Descriptionmentioning

confidence: 99%

A study on a novel solar contribution evaluation method for the solar-aided coal-fired power generation system

Jiang

Duan²,

Tong³

et al. 2022

Front. Energy Res.

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“…It denotes the ability of the ejector preheater to preheat the working fluid. TL ¼ T 7 À T 5 (10) where, T 7 and T 5 are the ejector outlet temperature and the primary flow temperature of the ejector, respectively.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…Because of the increased focus on low and medium temperature heat recovery, a large number of ORC studies have been completed since 2000 in order to improve ORC performance and maximize electricity production [6]. The following topics are primarily the focus of research: the selection of pure or zeotropic working fluids [7][8][9], system optimization [10,11], component modification [12,13], various thermodynamic cycles (basic ORC cycle, trans-supercritical cycle, regenerative cycle, and combined cycle) [14][15][16], and economic analysis [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of an Organic Rankine Cycle with a Preheated Ejector

Hu¹,

Zhang²,

Zhang³

et al. 2022

Fluid Dynamics &Amp; Materials Processing

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The so-called organic Rankine cycle (ORC) is an effective technology allowing heat recovery from lower temperature sources. In the present study, to improve its thermal efficiency, a preheated ejector using exhaust steam coming from the expander is integrated in the cycle (EPORC). Considering net power output, pump power, and thermal efficiency, the proposed system is compared with the basic ORC. The influence of the ejector ratio (ER) of the preheated ejector on the system performances is also investigated. Results show that the net power output of the EPORC is higher than that of the basic ORC due to the decreasing pump power. Under given working conditions, the average thermal efficiency of EPORC is 29% higher than that of ORC. The ER has a great impact on the performance of EPORC by adjusting the working fluid fed to the pump, leading to significant variations of the pump work Moreover, the ER has a remarkable effect on the working fluid temperature lift (TL) at the evaporator inlet, thus reducing the evaporator heat load. According to the results, the thermal efficiency of EPORC increases by 30%, when the ER increases from 0.05 to 0.4.

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“…Świerzewski et al 7 have investigated the economic effects and optimization of ORC with biomass fuel in combined heat and power production (CHP) mode. In this research, the effects of rated power and operating fluid of ORC were investigated.…”

Section: Introductionmentioning

confidence: 99%

Feasibility study of the high‐temperature organic Rankine cycle in combined heat and power state from energy, exergy, and economic point of view

Ehyaei,

Heberle,

Brüggemann

2024

Energy Science & Engineering

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The organic Rankine cycle (ORC) has received a lot of attention in recent years due to its wide application in energy recovery and the use of low‐temperature energy sources. In this article, the energy, exergy, and economic analyses of a high‐temperature ORC (HTORC) in combined heat and power production mode have been performed. In this system, the heating water at 90°C for domestic or industrial purposes is provided in the HTORC condenser. Two working fluids, hexamethyldisiloxane (MM) and siloxane mixture (MDM), have been evaluated and compared in HTORC. The system has been modeled in engineering equation solver software and key parameters such as energy efficiency and exergy of the system, output power, heat‐to‐power ratio, and levelized cost of electricity (LCOE) have been calculated. The energy and exergy efficiency of the system for the two working fluids MM and MDM are equal to 40.8%, 45.6%, 22.45%, and 19.3%, respectively. From the point of view of energy and exergy, the working fluid MM performs better. The LCOE of the system with MM working fluid is equal to 0.5946 US$/kWh, which is slightly higher than MDM working fluid (0.5702 US$/kWh).

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Techno-economic optimization of ORC system structure, size and working fluid within biomass-fired municipal cogeneration plant retrofitting project

Cited by 26 publications

References 20 publications

A study on a novel solar contribution evaluation method for the solar-aided coal-fired power generation system

A study on a novel solar contribution evaluation method for the solar-aided coal-fired power generation system

Performance Analysis of an Organic Rankine Cycle with a Preheated Ejector

Feasibility study of the high‐temperature organic Rankine cycle in combined heat and power state from energy, exergy, and economic point of view

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