Advanced exergy assessment of a solar absorption power cycle

Cao, Yan; Rostamian, Fateme; Ebadollahi, Mohammad; Bezaatpour, Mojtaba; Ghaebi, Hadi

doi:10.1016/j.renene.2021.11.039

Cited by 19 publications

(4 citation statements)

References 37 publications

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“…The boiler and condenser were the primary sources of exogenous exergy destruction, which could be reduced by changing the parameters of other components. Cao et al [ 22 ] used advanced exergy analysis to study a solar‐assisted absorption power cycle. The system had an exergy efficiency of 7.01%.…”

Section: Introductionmentioning

confidence: 99%

Advanced Exergy Analysis of Cascade Rankine Cycle‐Driven Reverse Osmosis System

Raninga,

Mudgal,

Patel

et al. 2024

Energy Tech

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A novel solar‐assisted cascade Rankine cycle‐driven reverse osmosis (RO) system is proposed and evaluated using conventional and advanced exergy analysis. The system comprises a solar collector as a heat input, steam Rankine cycle (SRC), and organic Rankine cycle (ORC) to generate turbine work and RO units for brackish water treatment. Water and R1233zd(E) are used as the working fluid in the SRC and ORC, respectively. The RO system is proposed to produce 1 m3 h−1 of permeate water from each RO unit. Conventional exergy analysis shows that the solar collector exhibits the highest exergy destruction of 0.798 kW, followed by the RO unit. However, advanced exergy analysis reveals that only 16.16% of the avoidable exergy in solar collectors can be reduced due to technical constraints. Advanced exergy analysis identified that endogenous avoidable exergy destruction contributes 24% of overall exergy destruction, which can be reduced by optimizing operating parameters and making technical improvements. The RO unit has a higher exogenous avoidable exergy, potentially suggesting improvements in other system component parameters. The advanced exergy analysis also prioritized the components for improving system performance in a sequence of RO high‐pressure pumps, RO modules, solar collector, ORC condenser, evaporative condenser, ORC expander, and SRC turbine.

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Section: Introductionmentioning

confidence: 99%

Advanced Exergy Analysis of Cascade Rankine Cycle‐Driven Reverse Osmosis System

Raninga,

Mudgal,

Patel

et al. 2024

Energy Tech

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“…They found that the total avoidable exergy destruction of the process was about 46.55%, and several optimization strategies were provided to reduce this part of exergy destruction. Cao et al investigated a solar-powered ARS by using advanced exergy analysis . They found that there was 73.69 kW of exergy destruction in the solar collector and the unavoidable endogenous part accounted for the highest.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Optimization of a Solar-Driven System Coupled with Liquid Dehumidification and Absorption Refrigeration Based on Advanced Exergy and Exergoeconomic Analyses

Wang

Yang

et al. 2023

ACS Sustainable Chem. Eng.

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A novel hybrid system coupled liquid dehumidification with absorption refrigeration driven by solar energy is proposed. Traditional and advanced exergy and exergoeconomic analyses of the system are conducted to ascertain the degree of irreversibility and potential improvement for each component. Based on the advanced exergy and exergoeconomic analyses, the effects of air humidity, segment temperature, and refrigeration temperature on the total exergy destruction and cost rates of the system are obtained. The total avoidable exergy destruction rate, avoidable exergy destruction cost rate, and avoidable investment cost rate of the system are selected as objective functions and optimized by using nondominated sort genetic algorithm-II. The results show that the total exergy destruction rate and the total exergy destruction cost rate reach 262.39 kW and 8.563 $/h, respectively. The generator and regenerator have higher cost rates of the irreversibility overall system, achieving the values 3.536 and 2.430 $/h, respectively. The absorber has the highest investment cost rate in the whole system. The endogenous parts of the exergy destruction and cost rates are much higher than the exogenous parts in the system. Multiobjective optimization results show that optimal values for the total avoidable exergy destruction rate and the exergy destruction cost rate are 50.99 kW and 1.60 $/h, which are 4.15 and 9.14% lower than those calculated by single-objective optimization, respectively. This study provides a potential way to utilize solar energy for dehumidification and refrigeration.

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“…8,9 Among various methods, renewable energy-based technologies, especially solar energy, can provide a green future for the earth with a rapid decrease in air pollution. 10,11 On the other side, it is better to investigate the feasibility of solar energy collecting sectors with new technologies in a novel framework. 12 To this end, the current investigation recommends a new integrated energy unit based on liquid metal magnetohydrodynamic (LMMHD) power driven by hybrid energy of solar and waste heat of biogas.…”

Section: Introductionmentioning

confidence: 99%

Investigation of a novel solar‐biogas based trigeneration system using a liquid metal magnetohydrodynamic equipment

Nezhad

Jafarmadar

2022

Intl J of Energy Research

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Summary The unsophisticated configuration of plants with magnetohydrodynamic liquid metal and no dynamic parts has made them cost‐effective and sustainable compared to the turbine‐based types. This paper proposes an innovative liquid metal magnetohydrodynamic‐based system for electricity, cooling, and hydrogen production utilizing a parabolic solar unit and waste exhaust gases as renewable heat sources, a double effect absorption cooling cycle, and a proton exchange membrane electrolyzer. Hence, an environmentally‐friendly system is devised and analyzed thermodynamically towards a lower emission footprint. The results of the thermodynamic analysis reveal that 71.5 kW, 10.26 m3/day, and 834.9 kW, power, hydrogen, and cooling are produced by the designed unit, respectively, with exergy efficiency and energy utilization factor of 45.28% and 40.27%. Also, the overall destruction of the exergy is obtained 527.4 kW, the main cause of which is the receiver due to high heat loss to the environment. The output of the parametric study indicates that the energy efficiency of the present plant improves by reducing the biogas temperature or by increasing the effectiveness of the solution heat exchanger and mass flow rate of the magnetohydrodynamic stream.

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Advanced exergy assessment of a solar absorption power cycle

Cited by 19 publications

References 37 publications

Advanced Exergy Analysis of Cascade Rankine Cycle‐Driven Reverse Osmosis System

Advanced Exergy Analysis of Cascade Rankine Cycle‐Driven Reverse Osmosis System

Modeling and Optimization of a Solar-Driven System Coupled with Liquid Dehumidification and Absorption Refrigeration Based on Advanced Exergy and Exergoeconomic Analyses

Investigation of a novel solar‐biogas based trigeneration system using a liquid metal magnetohydrodynamic equipment

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