Thermo-Economic Assessment of a Gas Microturbine-Absorption Chiller Trigeneration System under Different Compressor Inlet Air Temperatures

Valencia, Guillermo; Peñaloza, Carlos Acevedo; Forero, Jorge Duarte

doi:10.3390/en12244643

Cited by 25 publications

(15 citation statements)

References 39 publications

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“…The only way to limit it is through the efficient use of energy in the energy generation systems, and the increase of the green mass of the planet [4]. Two different methodologies have been proposed to promote rational energy use through the WHRS to increase the energy efficiency of combustion engine systems [5].…”

Section: Of 22mentioning

confidence: 99%

“…The engine operates with a thermal performance of 38.58%, which is an average value of this type of engine functioning in Colombia [4]. Additionally, it has been proposed to optimize thermo-economically the integration of different configurations of ORC cycles to the Jenbacher JMS 612 GS-N Engine, seeking to obtain both the lowest level cost of electric energy and the highest thermal efficiency of the heat recovery system [5,6]. However, in this section, the main focus is the study of the costs of the equipment supplied, where purchased equipment cost (PEC) is taken into account, and the other costs are calculated based on PEC or fixed capital investment (FCI) percentages.…”

Section: Evaluation Of Total Investment Costsmentioning

confidence: 99%

“…By adopting a tax incentive law, ORC-based waste gas recovery technology operating with high investment costs will present the greatest reduction in the level of energy costs [40], since it has a higher specific cost. In the case of Colombia, the generation with renewable energy [41,42], and acquisition and installation of this solution in an industrial context with acetone could achieve a reduction of approximately 12%, when considering tax incentives with asset depreciation at 10 years, financing of 50% of the initial investment costs (IFCI+DFCI), and a grace period of 5 years [5,22]. Therefore, solutions with organic fluids that imply high investment costs should not be discarded in case they deliver an important energy potential, and it is suggested to carry out a thermo-economic analysis with indicators that support the decision-making process.…”

Section: Evaluation Of Total Investment Costsmentioning

confidence: 99%

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Economic and Exergo-Advance Analysis of a Waste Heat Recovery System Based on Regenerative Organic Rankine Cycle under Organic Fluids with Low Global Warming Potential

2020

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The waste heat recovery system (WHRS) is a good alternative to provide a solution to the waste energy emanated in the exhaust gases of the internal combustion engine (ICE). Therefore, it is useful to carry out research to improve the thermal efficiency of the ICE through a WHRS based on the organic Rankine cycle (ORC), since this type of system takes advantage of the heat of the exhaust gases to generate electrical energy. The organic working fluid selection was developed according to environmental criteria, operational parameters, thermodynamic conditions of the gas engine, and investment costs. An economic analysis is presented for the systems operating with three selected working fluids: toluene, acetone, and heptane, considering the main costs involved in the design and operation of the thermal system. Furthermore, an exergo-advanced study is presented on the WHRS based on ORC integrated to the ICE, which is a Jenbacher JMS 612 GS-N of 2 MW power fueled with natural gas. This advanced exergetic analysis allowed us to know the opportunities for improvement of the equipment and the increase in the thermodynamic performance of the ICE. The results show that when using acetone as the organic working fluid, there is a greater tendency of improvement of endogenous character in Pump 2 of around 80%. When using heptane it was manifested that for the turbine there are near to 77% opportunities for improvement, and the use of toluene in the turbine gave a rate of improvement of 70%. Finally, some case studies are presented to study the effect of condensation temperature, the pinch point temperature in the evaporator, and the pressure ratio on the direct, indirect, and fixed investment costs, where the higher investment costs were presented with the acetone, and lower costs when using the toluene as working fluid.

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Section: Of 22mentioning

confidence: 99%

Section: Evaluation Of Total Investment Costsmentioning

confidence: 99%

Section: Evaluation Of Total Investment Costsmentioning

confidence: 99%

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Economic and Exergo-Advance Analysis of a Waste Heat Recovery System Based on Regenerative Organic Rankine Cycle under Organic Fluids with Low Global Warming Potential

2020

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“…The typical approach to improve the thermal systems is an exergy-based optimization method [ 15 , 17 ], where the objective is to minimize the exergy destroyed through components of the thermal cycle. However, these types of objective variables do not consider economic criteria that allow generating favorable conditions with economic and energy savings that are attractive to industries worldwide.…”

Section: Introductionmentioning

confidence: 99%

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Gutiérrez

Ochoa

Forero

2020

Heliyon

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This paper presents a comparative study on the energy, exergetic and thermo-economic performance of a novelty thermal power system integrated by a supercritical CO 2 Brayton cycle, and a recuperative organic Rankine cycle (RORC) or a simple organic Rankine cycle (SORC). A thermodynamic model was developed applying the mass, energy and exergy balances to all the equipment, allowing to calculate the exergy destruction in the components. In addition, a sensitivity analysis allowed studying the effect of the primary turbine inlet temperature (T IT, P HIGH , r P and T C ) on the net power generated, the thermal and exergy efficiency, and some thermo-economic indicators such as the payback period (PBP), the specific investment cost (SIC), and the levelized cost of energy (LCOE), when cyclohexane, acetone and toluene are used as working fluids in the bottoming organic Rankine cycle. The parametric study results show that cyclohexane is the organic fluid that presents the best thermo-economic performance, and the optimization with the PSO method conclude a 2308.91 USD/kWh in the SIC, 0.22 USD/kWh in the LCOE, and 9.89 year in the PBP for the RORC system. Therefore, to obtain technical and economic viability, and increase the industrial applications of these thermal systems, thermo-economic optimizations must be proposed to obtain lower values of the evaluated performance indicators.

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“…This manuscript [10] presents a thermo-economic analysis for a trigeneration system integrated by an absorption refrigeration chiller, a gas microturbine, and the heat recovery steam generation subsystem. The effect of the compressor inlet air temperature on the thermo-economic performance of the trigeneration system was studied and analyzed in detail based on a validated model.…”

Section: Introductionmentioning

confidence: 99%

Thermodynamic and Economic Analysis of Trigeneration System Comprising a Hierarchical Gas-Gas Engine for Production of Electricity, Heat and Cold

et al. 2020

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This paper presents the results of analysis of energy and economic efficiency of the hierarchical gas-gas engine, with a note that a trigeneration system was analyzed, in which the production of electricity, heat and cold are combined. This solution significantly increases the energy efficiency of the gas and gas system compared to a system without cold production. The analysis includes a system comprising a compressor chiller which is driven by an electric motor in the system, as well as a system applying the mechanical work that is carried out via a rotating shaft of rotor-based machines, i.e., a gas turbine and a turboexpander. The comfort of the regulation of the refrigerating power rather promotes the use of a solution including an electric motor. Analysis contains also a schematic diagram of the system with a absorption chiller, which is driven by low-temperature enthalpy of exhaust gases extracted from a hierarchical gas-gas engine. Application of turboexpander with heat regeneration in the trigeneration system is also analyzed. Based on the multi-variant economic and thermodynamic calculations, the most favorable system variant was determined using, among others, the specific cost of cold production.

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Thermo-Economic Assessment of a Gas Microturbine-Absorption Chiller Trigeneration System under Different Compressor Inlet Air Temperatures

Cited by 25 publications

References 39 publications

Economic and Exergo-Advance Analysis of a Waste Heat Recovery System Based on Regenerative Organic Rankine Cycle under Organic Fluids with Low Global Warming Potential

Economic and Exergo-Advance Analysis of a Waste Heat Recovery System Based on Regenerative Organic Rankine Cycle under Organic Fluids with Low Global Warming Potential

A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Thermodynamic and Economic Analysis of Trigeneration System Comprising a Hierarchical Gas-Gas Engine for Production of Electricity, Heat and Cold

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