A comprehensive exergy-based evaluation on cascade absorption-compression refrigeration system for low temperature applications - exergy, exergoeconomic, and exergoenvironmental assessments

Mousavi, Seyed Ali; Mehrpooya, Mehdi

doi:10.1016/j.jclepro.2019.119005

Cited by 108 publications

(23 citation statements)

References 38 publications

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“…where E is the exergy;ṁ is the mass flow rate; and e ph and e ch are the physical and chemical exergies, respectively, which are described in Eqs. ( 6) and ( 7) (Mousavi and Mehrpooya, 2020):…”

Section: Exergy Analysismentioning

confidence: 99%

Black Hole-Inspired Optimal Design of Biomethane Liquefaction Process for Small-Scale Applications

Qyyum

Zhou

et al. 2021

Front. Energy Res.

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Biomethane is regarded as a promising renewable energy source, with great potential to satisfy the growth of energy demands and to reduce greenhouse gas emissions. Liquefaction is a suitable approach for long distances and overseas transportation of biomethane; however, it is energy-intensive due to its cryogenic working condition. The major challenge is to design a high-energy efficiency liquefaction process with simple operation and configuration. A single mixed refrigerant biomethane liquefaction process adopting the cryogenic liquid turbine for small-scale production has been proposed in this study to address this issue. The optimal design corresponding to minimal energy consumption was obtained through the black-hole-based optimization algorithm. The effect of the minimum internal temperature approach (MITA) in the main cryogenic heat exchanger on the biomethane liquefaction process performance was investigated. The study results indicated that the specific energy consumption of modified case 2 with MITA of 2°C was 0.3228 kWh/kg with 21.01% reduction compared to the published base case. When the MITA decreased to 1°C, the specific power of modified case 1 reduced to 0.3162 kWh/kg, which was 24.96% lower than the base case. In terms of exergy analysis, the total exergy destruction of the modified cases 1, 2, and 3 was 31.28%, 22.27%, and 17.51% lower than the base case, respectively. This study’s findings suggested that introducing the cryogenic liquid turbine to the single mixed refrigerant-based biomethane liquefaction process could reduce the specific energy consumption and total exergy destruction significantly. Therefore, this study could provide a viable path for designing and improving the small-scale biomethane liquefaction process.

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Section: Exergy Analysismentioning

confidence: 99%

Black Hole-Inspired Optimal Design of Biomethane Liquefaction Process for Small-Scale Applications

Qyyum

Zhou

et al. 2021

Front. Energy Res.

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“…Shokati et al [81] analyzed an ammonia-water double effect absorption refrigeration/Kalina cogeneration cycle, and obtained very low f k values for the condenser, high-pressure steam generator, and boiler, and concluded that selection of these components with higher quality and price can improve the overall performance of the cogeneration cycle. Mousavi and Mehrpooya [87] reported on a cascade absorption-compression refrigeration system, and after evaluation of r k and f k , decided that the compressor and gas heat exchanger presented the best potential for optimization. Wang et al [88] explored a novel cooling and power cycle and identified the vapor generator #1 and solution heat exchanger as possibilities for optimization due to the high r k and low f k .…”

Section: D )mentioning

confidence: 99%

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

et al. 2020

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This study applies the SPecific Exergy COsting (SPECO) methodology for the exergoeconomic assessment of a compact electricity-cooling cogeneration system. The system utilizes the exhaust gases from a 126 hp Otto-cycle internal combustion engine (ICE) to drive a 5 RT ammonia–water absorption refrigeration unit. Exergy destruction is higher in the ICE (67.88%), followed by the steam generator (14.46%). Considering the cost of destroyed exergy plus total cost rate of equipment, the highest values are found in the ICE, followed by the steam generator. Analysis of relative cost differences and exergoeconomic factors indicate that improvements should focus on the steam generator, evaporator, and absorber. The cost rate of the fuel consumed by the combustion engine is 12.84 USD/h, at a specific exergy cost of 25.76 USD/GJ. The engine produces power at a cost rate of 10.52 USD/h and specific exergy cost of 64.14 USD/GJ. Cooling refers to the chilled water from the evaporator at a cost rate of 0.85 USD/h and specific exergy cost of 84.74 USD/GJ. This study expands the knowledge base regarding the exergoeconomic assessment of compact combined cooling and power systems.

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“…The above results are evaluated using a classic LCA but a novel approach named prospective LCA also exists and may bring to different findings. This methodology is commonly used to compare systems having different maturity levels: the future characteristics of emerging technologies can be forecasted to valorize their future potential [50].…”

Section: Lcamentioning

confidence: 99%

“…Figure 5 is useful to understand that, in each month, the impact of the exergy destructions is higher than that of the components' life cycle, and that the total environmental impact varies in a range between 14.0 and 24.5 Pts/day. Energy systems fueled by fossils are typically characterized by high-impact exergy destructions because of the specific environmental burden of the fuel [50]. Contrarily, in this case, the contribution of life cycle impacts (in blue) is lower but not negligible compared to the exergy destructions impacts (in orange).…”

Section: Y K +mentioning

confidence: 99%

Exergo-Economic and Environmental Analysis of a Solar Integrated Thermo-Electric Storage

et al. 2020

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Renewable energies are often subject to stochastic resources and daily cycles. Energy storage systems are consequently applied to provide a solution for the mismatch between power production possibility and its utilization period. In this study, a solar integrated thermo-electric energy storage (S-TEES) is analyzed both from an economic and environmental point of view. The analyzed power plant with energy storage includes three main cycles, a supercritical CO2 power cycle, a heat pump and a refrigeration cycle, indirectly connected by sensible heat storages. The hot reservoir is pressurized water at 120/160 °C, while the cold reservoir is a mixture of water and ethylene glycol, maintained at −10/−20 °C. Additionally, the power cycle’s evaporator section rests on a solar-heated intermediate temperature (95/40 °C) heat reservoir. Exergo-economic and exergo-environmental analyses are performed to identify the most critical components of the system and to obtain the levelized cost of electricity (LCOE), as well as the environmental indicators of the system. Both economic and environmental analyses revealed that solar energy converting devices are burdened with the highest impact indicators. According to the results of exergo-economic analysis, it turned out that average annual LCOE of S-TEES can be more than two times higher than the regular electricity prices. However, the true features of the S-TEES system should be only fully assessed if the economic results are balanced with environmental analysis. Life cycle assessment (LCA) revealed that the proposed S-TEES system has about two times lower environmental impact than referential hydrogen storage systems compared in the study.

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A comprehensive exergy-based evaluation on cascade absorption-compression refrigeration system for low temperature applications - exergy, exergoeconomic, and exergoenvironmental assessments

Cited by 108 publications

References 38 publications

Black Hole-Inspired Optimal Design of Biomethane Liquefaction Process for Small-Scale Applications

Black Hole-Inspired Optimal Design of Biomethane Liquefaction Process for Small-Scale Applications

Exergoeconomic Assessment of a Compact Electricity-Cooling Cogeneration Unit

Exergo-Economic and Environmental Analysis of a Solar Integrated Thermo-Electric Storage

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