Using the potential of energy losses in gas pressure reduction stations for producing power and fresh water

Deymi–Dashtebayaz, Mahdi; Dadpour, Daryoush

doi:10.1016/j.desal.2020.114763

Cited by 39 publications

(9 citation statements)

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“…In this study, using the Pareto optimal solution and based on the TOPSIS method, which is used to select the final optimal parameters in the Pareto frontier as a multi-objective decision-making method, the proposed system optimizes [57,58]. The equations for the optimization method are as follows [39]:…”

Section: -1-optimization Methods and Objective Functionsmentioning

confidence: 99%

“…The size of heat exchangers in the present work is calculated using the relationship between the heat transfer rate (Q ̇k) of each heat exchanger with the logarithmic mean temperature difference (LMTD K ) and the overall heat transfer coefficient (U k ) [39]:…”

Section: -4-1-determining the Size Of Heat Exchangersmentioning

confidence: 99%

“…The following equations are used to calculate the unit cost of each exergy current for input, output, power, and heat transfer [39]: where c is the unit costs of exergy currents. In addition, Eq.…”

Section: -4-3-cost Balance Equationsmentioning

confidence: 99%

“…After solving the exergy balance equations for different components, the exergoeconomic balance equations can be derived and applied, which are discussed in the following. [39]:…”

Section: -4-3-cost Balance Equationsmentioning

confidence: 99%

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Modeling and multi-objective optimization of a combined cooling, fresh water and power system for gas turbine waste heat recovery

Norani

Deymi–Dashtebayaz

Gholizadeh

et al. 2022

Preprint

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Increasing the efficiency of gas turbine cycle (GTC)-based energy systems and reducing the irreversibility of its processes is one of the challenges that researchers are considering today. The use of waste energy of GTC and inlet air cooling to it are two techniques that help to increase the efficiency of energy production of these systems while the simultaneous it use has been less considered in multiple-generation systems. In this study, a new GTC-based tri-generation system consisting of organic rankine cycle (ORC), thermoelectric generator (TEG), reverse osmosis (RO), and absorption refrigeration cycle (ARC) subsystems is presented. This system simultaneously generates electricity, freshwater, and cooling. The total cooling capacity is used in two parts: user demand and inlet air cooling to the GTC compressor. Tri-generation system was examined from three views energy, exergy and exergoeconomic. The results of the thermodynamic analysis showed that the simultaneous use of two waste heat recovery and inlet air cooling of GTC techniques in the tri-generation system reduces the exergy destruction cost rate of the system while increasing the total energy and exergy efficiencies. To improve system performance after a parametric study, a three-objective optimization was performed using the TOPSIS method. The comparison of the results of optimal and design conditions showed that the exergy destruction rate of the system has decreased in optimal conditions and the highest rate of exergy destruction, which is related to the GTC combustion chamber component, has decreased by 66.8 kW. In addition, the total capital cost rate of the system in optimal conditions was reduced by 0.33 kW compared to the design conditions. According to the optimal results, the best performance of the system is in the conditions of the compressor pressure ratio of GTC 8.795 and the turbine inlet temperature of GTC 1505 K that the system has COP 0.74, total exergy efficiency 55.51%, and total product cost rate 32.28 $/h.

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Section: -1-optimization Methods and Objective Functionsmentioning

confidence: 99%

Section: -4-1-determining the Size Of Heat Exchangersmentioning

confidence: 99%

Section: -4-3-cost Balance Equationsmentioning

confidence: 99%

“…After solving the exergy balance equations for different components, the exergoeconomic balance equations can be derived and applied, which are discussed in the following. [39]:…”

Section: -4-3-cost Balance Equationsmentioning

confidence: 99%

See 2 more Smart Citations

Modeling and multi-objective optimization of a combined cooling, fresh water and power system for gas turbine waste heat recovery

Norani

Deymi–Dashtebayaz

Gholizadeh

et al. 2022

Preprint

Self Cite

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“…Many authors, such as Morgese et al [20], propose an optimization design procedure of a tur-boexpander by considering fluid dynamic and technical requirements. Recovery of waste energy of the gas stations can also be used for both producing power and freshwater with a potentially substantial effect on the reduction of greenhouse gases and air emissions [21]. Golchoobian et al [22] investigated the feasibility of using a turboexpander coupled with a refrigeration cycle to decrease the inlet temperature of air and increase the generated power.…”

Section: Introductionmentioning

confidence: 99%

Efficiency Enhancement of Gas Turbine Systems with Air Injection Driven by Natural Gas Turboexpanders

2021

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The fuel source of many simple and combined-cycle power plants usually comes from a nearby natural gas transmission pipeline at a pressure from 50 to over 70 bar. The use of a turboexpander instead of throttling equipment offers a promising alternative to regulate the pressure of natural gas introduced to the power plant. Specifically, it helps recover part of the available energy of the compressed gas in the transmission pipeline, increase the power output and efficiency of the gas turbine system, and decrease the fuel use and harmful emissions. In this paper, the addition of such a turboexpander in a gas pressure-reduction station is studied. The recovered power is then used to drive the compression of extra air added to the combustion chamber of a heavy-duty gas turbine. The performance of this configuration is analyzed for a wide range of ambient temperatures using energy and exergy analyses. Fuel energy recovered in this way increases the output power and the efficiency of the gas turbine system by a minimum of 2.5 MW and 0.25%, respectively. The exergy efficiency of the gas turbine system increases by approximately 0.36% and the annual CO2 emissions decrease by 1.3% per MW.

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A 3E analysis of a multi‐power generation system employing CO₂, LNG, and Organic Rankine cycles

Dadpour,

Deymi‐Dashtebayaz,

Delpisheh

et al. 2024

Env Prog and Sustain Energy

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One avenue in increasing the energy efficiency of energy systems is through utilizing the thermal energy of flue gases of industrial plants. On this thread, herein, a novel combined cascade cycle for heat recovery of flue gases of an industrial plant is proposed comprising of an organic Rankine cycle (ORC), high‐pressure transcritical CO2 cycle, transcritical CO2 cycle, and a liquefied natural gas (LNG) regasification cycle. System analysis is conducted using energy, exergy, and eco‐exergy equations. The optimization is carried out using the TOPSIS multi‐objective method. Exergy efficiency, net output work, and cost are identified as the optimization objectives. The optimization process focused on fine‐tuning variables including the vapor generator pinch point temperature, ORC turbine inlet pressure, ORC condenser pressure, and ORC condenser pinch point temperature, with optimal values gauged at 19.31°C, 29.59 bar, 1.413 bar, and 14.52°C, respectively. The preheater had the largest exergy destruction share, followed by the heat exchanger unit. The analysis showed that the ORC condenser pressure and temperature difference between two working fluids in the heat exchanger were the most critical parameters in the proposed cycle, significantly affecting the system performance. Accordingly, the exergy efficiency, net output work, and cost values in the optimal state were equal to 15.2%, 6416 kW, and 0.7457 $/s, respectively. The advantages of the proposed system include efficient heat recovery through the coupling of the multiple cycles and enhanced energy conversion pertinent to a wider range of temperatures, maximizing the overall energy extraction from the waste heat.

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Using the potential of energy losses in gas pressure reduction stations for producing power and fresh water

Cited by 39 publications

References 39 publications

Modeling and multi-objective optimization of a combined cooling, fresh water and power system for gas turbine waste heat recovery

Modeling and multi-objective optimization of a combined cooling, fresh water and power system for gas turbine waste heat recovery

Efficiency Enhancement of Gas Turbine Systems with Air Injection Driven by Natural Gas Turboexpanders

A 3E analysis of a multi‐power generation system employing CO₂, LNG, and Organic Rankine cycles

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Using the potential of energy losses in gas pressure reduction stations for producing power and fresh water

Cited by 39 publications

References 39 publications

Modeling and multi-objective optimization of a combined cooling, fresh water and power system for gas turbine waste heat recovery

Modeling and multi-objective optimization of a combined cooling, fresh water and power system for gas turbine waste heat recovery

Efficiency Enhancement of Gas Turbine Systems with Air Injection Driven by Natural Gas Turboexpanders

A 3E analysis of a multi‐power generation system employing CO2, LNG, and Organic Rankine cycles

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A 3E analysis of a multi‐power generation system employing CO₂, LNG, and Organic Rankine cycles