Thermo-economic analysis of a novel integrated structure for liquefied natural gas production using photovoltaic panels

Afrouzy, Zahra Alizadeh; Taghavi, Masoud

doi:10.1007/s10973-021-10769-4

Cited by 19 publications

(12 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Working in a vacuum state necessitates extra precautions, such as utilizing a vacuum pump and N 2 purging to keep air from entering the system, designing a device with vacuum-resistant materials, and increasing the cost of equipment and pipes . In the research conducted, working in pressures less than 100 kPa has been avoided, and the ammonia flow pressure after the valves has been taken as 1.2 bar, including the margin of 0.2 bar from the minimum level. ,− The temperature of the saturated mixture of ammonia at a pressure of 1.2 bar is equal to −29.4 °C, and considering the minimum temperature of 3 °C in the evaporator, this flow can cool down to a temperature of −26.4 °C (as shown in Figure b) …”

Section: Different Methods To Improve the Performance Of Hydrogen Liq...mentioning

confidence: 99%

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

et al. 2023

View full text Add to dashboard Cite

The main challenges of liquid hydrogen (H2) storage as one of the most promising techniques for large-scale transport and long-term storage include its high specific energy consumption (SEC), low exergy efficiency, high total expenses, and boil-off gas losses. This article reviews different approaches to improving H2 liquefaction methods, including the implementation of absorption cooling cycles (ACCs), ejector cooling units, liquid nitrogen/liquid natural gas (LNG)/liquid air cold energy recovery, cascade liquefaction processes, mixed refrigerant systems, integration with other structures, optimization algorithms, combined with renewable energy sources, and the pinch strategy. This review discusses the economic, safety, and environmental aspects of various improvement techniques for H2 liquefaction systems in more detail. Standards and codes for H2 liquefaction technologies are presented, and the current status and future potentials of H2 liquefaction processes are investigated. The cost-efficient H2 liquefaction systems are those with higher production rates (>100 tonne/day), higher efficiency (>40%), lower SEC (<6 kWh/kgLH2), and lower investment costs (1–2 $/kgLH2). Increasing the stages in the conversion of ortho- to para-H2 lowers the SEC and increases the investment costs. Moreover, using low-temperature waste heat from various industries and renewable energy in the ACC for precooling is significantly more efficient than electricity generation in power generation cycles to be utilized in H2 liquefaction cycles. In addition, the substitution of LNG cold recovery for the precooling cycle is associated with the lower SEC and cost compared to its combination with the precooling cycle.

show abstract

Section: Different Methods To Improve the Performance Of Hydrogen Liq...mentioning

confidence: 99%

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

et al. 2023

View full text Add to dashboard Cite

show abstract

“…As mentioned before, power generation, power consumption, and net power consumption are enhanced linearly by increasing current density. The net power consumption of SOEC/SOFC slop T A B L E 3 Equations for computation of components exergy destruction and their exergy efficiency 21,[39][40][41]…”

Section: Validation Of Electrochemical Simulation Of the Soec-sofcmentioning

confidence: 99%

An innovative hybrid system for the polygeneration of power, heat, and liquid carbon dioxide using solid oxide fuel cell/electrolyzer technology and oxyfuel power generation cycle

Ghorbani

Manesh

2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary An innovative polygeneration structure is proposed based on the oxyfuel power generation (OPG) system integration with carbon dioxide (CO2) capture, CO2 power system, NH3/H2O absorption refrigeration (AR) unit, and organic Rankine power (ORP) cycle. In this regard, a combination of solid oxide electrolysis cell (SOEC) and solid oxide fuel cell (SOFC) is applied to produce the required pure oxygen for the OPG system. The proposed system simultaneously produces 7204 kmol/h hot water, 149.3 kmol/h liquid CO2, and 102.4 MW power in different cycles. Energy and exergy analyses are performed to evaluate the proposed system. The thermodynamic modeling and simulation of power and refrigeration cycles are performed in Aspen HYSYS software, and verified with high accuracy. Also, an integrated SOEC/SOFC simulation has been done using developed computer code in MATLAB programming. The overall electrical efficiency and the AR coefficient of performance are calculated at 31.55% and 0.4803, respectively. In addition, the thermal and exergy efficiencies of the proposed system are 65.10% and 70.60%, respectively. The exergy analysis indicates the combustion chamber's highest exergy destruction with a share of 35.26%. In the next rank, the heat exchangers (26.42%) and turbines (16.98%) have the largest share of degraded exergy among other devices. The sensitivity analysis demonstrates that when the oxygen productivity increases from 9050 to 9275 kg/h, the electrical efficiency in the total integrated structure and the liquid CO2 productivity rise to 34.57% and 6480 kg/h, respectively. Also, by increasing the natural gas entering the proposed structure from 2375 to 2550 kg/h, the exergy efficiency of the structure increases to 71.19% and its thermal efficiency decreases to 58.70%. Highlights A novel polygeneration system to produce power, liquid CO2, and heat is introduced. Integration of oxyfuel/ORC/CO2 power plants and absorption cooling unit is applied. A solid oxide fuel cell/electrolyzer technology is used to produce pure oxygen. The electrical and exergy efficiencies of the overall system are 31.55% and 70.60%. The exergy analysis indicates the combustion chamber has the highest exergy destruction.

show abstract

“…The specific entropy of the ideal isentropic nozzle outlet (S H S ′ ) is equal to the entropy at point H. Using these data, (h H S ′ ) can be obtained. Thus, the nozzle isentropic efficiency is calculated by Equation (25). The initial stream velocity at the nozzle outlet (U H′ ) is obtained by Equation ( 26) by excluding u ( ) H 23,37 :…”

Section: Nozzlementioning

confidence: 99%

“…The technology and raw materials used to manufacture PV panels can greatly influence the future of their manufacturing factories. The important criteria for selecting PV panels as well as economic and environmental conditions should be examined to determine the PV system efficiency 25 . The ORC is essentially similar to the steam Rankine cycle, except that it uses organic fluids with a lower boiling point to better match its operation with heat sources with lower temperatures 26 .…”

Section: Introductionmentioning

confidence: 99%

“…The important criteria for selecting PV panels as well as economic and environmental conditions should be examined to determine the PV system efficiency. 25 The ORC is essentially similar to the steam Rankine cycle, except that it uses organic fluids with a lower boiling point to better match its operation with heat sources with lower temperatures. 26 Mechanical heat pumps use the compression cycle to increase the working fluid temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Novel integrated structure consisting of CO₂ capture cycle, heat pump unit, Kalina power, and ejector refrigeration systems for liquid CO₂ storage using renewable energies

Ebrahimi

Ghorbani

Taghavi

2022

Energy Science & Engineering

Self Cite

View full text Add to dashboard Cite

Nowadays, the development of various technologies for improving the quality of life in human societies and, consequently, increased global warming have prioritized environmental factors to reduce major industrial pollutants including carbon dioxide (CO 2 ). Designing efficient integrated processes improves the performance of the whole system. In this study, a novel integrated structure is designed to capture CO 2 from power plants' flue gases and liquefy it. For this purpose, a monoethanolamine-based CO 2 capture cycle, an ejector refrigeration system, a Kalina power unit, and a organic Rankine power plant are utilized. High-and low-temperature heat of the system is provided by the heat pump cycle and geothermal energy, respectively. Then, 2.641 kg/s of liquid CO 2 is generated as the final product of the system. In the proposed system, 20,562 kW heat duty and 657.3 kW power are supplied geothermal energy and the photovoltaic (PV) system, respectively. The coefficient of performance of the heat pump cycle and thermal efficiency of the organic Rankine unit is calculated at 3.661% and 12.64%, respectively. Results of the exergy investigation indicate that the highest exergy destruction belonged to PV cells, which independently accounted for 39.81% of the total reversibility. The exergy efficiency and total reversibility of the structure are computed at 24.2% and 6555 kW. Sensitivity analysis was performed on several of the most important parameters of the combined structure. The outcomes indicate that the ratio of liquid CO 2 rate to total power consumption and net power consumption increase up to 4.096 kg/s LCO 2 /MW and 1669 kW, respectively, when the CO 2 concentration in the flue gas increases from 1 to 9 mol%.

show abstract

Thermo-economic analysis of a novel integrated structure for liquefied natural gas production using photovoltaic panels

Cited by 19 publications

References 37 publications

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

An innovative hybrid system for the polygeneration of power, heat, and liquid carbon dioxide using solid oxide fuel cell/electrolyzer technology and oxyfuel power generation cycle

Novel integrated structure consisting of CO₂ capture cycle, heat pump unit, Kalina power, and ejector refrigeration systems for liquid CO₂ storage using renewable energies

Contact Info

Product

Resources

About

Thermo-economic analysis of a novel integrated structure for liquefied natural gas production using photovoltaic panels

Cited by 19 publications

References 37 publications

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

Strategies To Improve the Performance of Hydrogen Storage Systems by Liquefaction Methods: A Comprehensive Review

An innovative hybrid system for the polygeneration of power, heat, and liquid carbon dioxide using solid oxide fuel cell/electrolyzer technology and oxyfuel power generation cycle

Novel integrated structure consisting of CO2 capture cycle, heat pump unit, Kalina power, and ejector refrigeration systems for liquid CO2 storage using renewable energies

Contact Info

Product

Resources

About

Novel integrated structure consisting of CO₂ capture cycle, heat pump unit, Kalina power, and ejector refrigeration systems for liquid CO₂ storage using renewable energies