Exergy and exergoeconomic analyses of a combined cooling, heating, and power (CCHP) system based on dual-fuel of biomass and natural gas

Yang, Kun; Zhu, Neng; Ding, Yan; Chen, Chang; Da-quan, Wang; Yuan, Tianhao

doi:10.1016/j.jclepro.2018.09.251

Cited by 71 publications

(12 citation statements)

References 48 publications

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“…Exergy and exergoeconomic evaluations were performed by Baniasadi et al [20] for a trigeneration system based on natural gas-proton exchange membrane fuel cell and by Jing et al [21] for a trigeneration system based on solar absorption and absorption-compression hybrid refrigeration, which helped promote the application of solar cooling due to the positive results. The exergoeconomic analysis of a trigeneration solar system for a university building in Iran was reported by Haghghi et al [22], while a hotel building was the focus of Yang et al [23], who presented a dual-fuel trigeneration system based on biomass and natural gas. These studies highlighted the advantages of exergoeconomics and benefitted from the interconnection between thermodynamics and economics, where crucial data were obtained on the trade-offs between exergy destruction and the capital cost of components.…”

Section: Introductionmentioning

confidence: 99%

Energy, exergy, and exergoeconomic evaluations of a micro-trigeneration system

Marques

Carvalho

Lourenço

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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This study presents energy, exergy, and exergoeconomic assessments for a natural gas-fueled micro-trigeneration unit, which encompasses an internal combustion engine (ICE), an absorption refrigeration system (ammonia-water), and a heat recovery unit. The energy system is designed to meet the electricity and cooling demands of a university building, while heat is directed to a biodiesel plant located on site. The analyses comprehended energy and exergy parameters (first and second laws of thermodynamics). Then, the SPECO methodology was applied for the exergoeconomic assessment, which associates monetary values with exergy flows. The ICE presented the highest irreversibility (61.24 kW) and the highest cost of exergy destruction (21.56 BRL/h), followed by the steam generator (5.52 kW and 6.71 BRL/h, respectively). The exergoeconomic assessment indicated the components that could benefit from improvements: steam generator (cooling of exhaust gases before entry into the generator) and the heat exchanger of the absorber (substitution of the exchanger and/or pre-heating of input air). This study contributes to narrow the knowledge gap regarding the exergoeconomic assessment of compact trigeneration systems, besides making a case for the utilization of ICE as prime movers.

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Section: Introductionmentioning

confidence: 99%

Energy, exergy, and exergoeconomic evaluations of a micro-trigeneration system

Marques

Carvalho

Lourenço

et al. 2020

J Braz. Soc. Mech. Sci. Eng.

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“…ĖD ,other is the sum of exergy destruction rates in system components other than that in component k. Regarding Figure 4, if the ĖD ,other converges to zero, the exogenous exergy destruction rate for k component converts zero, and the endogenous part is determined [44]. [43].…”

Section: Advanced Exergy Modelingmentioning

confidence: 98%

“…In this study, advanced exergy analysis was performed using the engineering approach ( Figure 4). This method principally can be utilized for a component that chemical reactions take place, such as gasifier and combustion chamber [43]. ĖD ,other is the sum of exergy destruction rates in system components other than that in component k. Regarding Figure 4, if the ĖD ,other converges to zero, the exogenous exergy destruction rate for k component converts zero, and the endogenous part is determined [44].…”

Section: Advanced Exergy Modelingmentioning

confidence: 99%

Comparative 4E and advanced exergy analyses and multi-objective optimization of refrigeration cycles with a heat recovery system

Mofrad

Zandi

Salehi

et al. 2020

International Journal of Thermodynamics

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This paper aims to provide comprehensive 4E (energy, exergy, exergoeconomic, and exergoenvironmental) and advanced exergy analyses of the Refrigeration Cycle (RC) and Heat Recovery Refrigeration Cycle (HRRC) and comparison of the performance with R744 (CO2) and R744A (N2O) working fluids. Moreover, multi-objective optimization of the systems has been considered to define the optimal conditions and the best cycle from various perspectives. In HRRC, heat recovery is used as a heat source for an organic Rankine cycle. The energy and exergy analysis results show that utilizing HRRC with both refrigerants increases the coefficient of performance (COP) and exergy efficiency. COP and exergy efficiency for HRRC-R744 have been obtained 2.82 and 30.7%, respectively. Due to the better thermodynamic performance of HRRC, other analyses have been performed on this cycle. Exergoeconomic analysis results show that using R744A leads to an increase in the total product cost. Total product cost with R744 and R744A have been calculated by 1.56 $/h and 1.96$/h, respectively. Additionally, to obtain the processes' environmental impact, Life Cycle Assessment (LCA) is used. Exergoenvironmental analysis showed that using R744A increases the product environmental impact by 32%. Owning to the high amount of endogenous exergy destruction rate in the compressor and ejector compared to other equipment, they have more priority for improvement. Multi-objective optimization has been performed with exergy efficiency and total product cost objective functions as well as COP and product environmental impact for both refrigerants, which indicates that HRRC-R744 has better performance economically and environmentally. In optimal condition, the value of exergy efficiency, total product cost, COP, and the product environmental impact have been accounted for by 28.51%, 1.44 $/h, 2.76, and 149.01 mpts/h, respectively.

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“…The most serviceable way to increase the cost effectiveness of the system is to grasp the source of inefficiencies cost, which is very beneficial to reduce the production cost of the system. Some studies were to present a clearer picture of the main irreversibility and their corresponding costs and to find some effective alternatives to improve the efficiency and cost-effectiveness [16][17][18][19][20][21]. The application examples of this kind of multi-effect power plant include the combination of gas turbine cycle and pressurized water reactor power plant, and the combined cycle with co-firing of biomass and natural gas, which can improve the efficiency of the power plant [17,22].…”

Section: Introductionmentioning

confidence: 99%

Exergy and Exergoeconomic Analysis of a Combined Cooling, Heating, and Power System Based on Solar Thermal Biomass Gasification

Wang

et al. 2019

Energies

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The purpose of this paper is to improve the utilization of renewable energy by exergy and exergoeconomic analysis of the novel combined cooling, heating, and power (CCHP) system, which is based on solar thermal biomass gasification. The source of heat to assist biomass and steam gasification is the solar heat collected by a dish collector, and the product gas being fuel that drives the internal combustion engine to generate electricity and then to produce chilled/hot water by a waste heat unitization system. The analysis and calculation of the exergy loss and exergy efficiency of each component reveal the irreversibility in the heating and cooling conditions. Then, the exergoeconomic costs of multi-products such as electricity, chilled water, heating water, and domestic hot water are calculated by using the cost allocation method based on energy level. The influencing factors of the unit exergy cost of products are evaluated by sensitivity analysis, such as initial investment cost, biomass cost, service life, interest rate, and operating time coefficient. The results reveal that the internal combustion engine takes up 49.2% of the total exergy loss, and the most effective method of products cost allocation is the exergoeconomic method based on energy level and conforms to the principle of high energy level with high cost.

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Exergy and exergoeconomic analyses of a combined cooling, heating, and power (CCHP) system based on dual-fuel of biomass and natural gas

Cited by 71 publications

References 48 publications

Energy, exergy, and exergoeconomic evaluations of a micro-trigeneration system

Energy, exergy, and exergoeconomic evaluations of a micro-trigeneration system

Comparative 4E and advanced exergy analyses and multi-objective optimization of refrigeration cycles with a heat recovery system

Exergy and Exergoeconomic Analysis of a Combined Cooling, Heating, and Power System Based on Solar Thermal Biomass Gasification

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