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A comparative energy and exergy optimization of a supercritical-CO2 Brayton cycle and Organic Rankine Cycle combined system using swarm intelligence algorithms

Valencia, Guillermo; Duarte Forero, Jorge; Rojas Suárez, Jhan Piero (HeliyonAmsterdam , Paises Bajos, 2020-06)

) using the PSO algorithm. A thermodynamic model of the integrated system was developed from the application of mass, energy and exergy balances to each component, which allowed the calculation of the exergy destroyed a ...
A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles

Cárdenas-Gutiérrez, Javier Alfonso; Duarte Forero, Jorge; Valencia Ochoa, Guillermo (HeliyonReino Unido, 2020-07-14)

This paper presents a comparative study on the energy, exergetic and thermo-economic performance of a novelty thermal power system integrated by a supercritical CO2 Brayton cycle, and a recuperative organic Rankine cycle ...
Shaft pump power - effect of pipe network configuration

Obregon, Luis; Espinel Blanco, Edwin; Acevedo Peñaloza, Carlos Humberto (International Journal on Energy ConversionItalia, 2020-05)

Building design has often many engineering challenges to achieve the best possible energy and economic efficiencies. It is necessary to use technological tools capable of predicting with a high degree of accuracy the ...

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A comparative energy and exergy optimization of a supercritical-CO2 Brayton cycle and Organic Rankine Cycle combined system using swarm intelligence algorithms
...
Valencia, Guillermo | 2020-06

) using the PSO algorithm. A thermodynamic model of the integrated system was developed from the application of mass, energy and exergy balances to each component, which allowed the calculation of the exergy destroyed a fraction of each equipment, the power generated, the thermal and exergetic efficiency of the system. In addition, through a sensitivity analysis, the effect of the main operational and design variables on thermal efficiency and total exergy destroyed was studied, which were the objective functions selected in the proposed optimization. The results show that the greatest exergy destruction occurs at the thermal source, with a value of 97 kW for the system without Reheater (NRH), but this is reduced by 92.28% for the system with Reheater (RH). In addition, by optimizing the integrated cycle for a particle number of 25, the maximum thermal efficiency of 55.53% (NRH) was achieved, and 56.95% in the RH system. Likewise, for a particle number of 15 and 20 in the PSO algorithm, exergy destruction was minimized to 60.72 kW (NRH) and 112.06 kW (RH), respectively. Comparative analyses of some swarm intelligence optimization algorithms were conducted for the integrated S-CO2-SORC system, evaluating performance indicators, where the PSO optimization algorithm was favorable in the analyses, guaranteeing that it is the ideal algorithm to solve this case study.

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A comparative study of the energy, exergetic and thermo-economic performance of a novelty combined Brayton S-CO2-ORC configurations as bottoming cycles
...
Cárdenas-Gutiérrez, Javier Alfonso | 2020-07-14

This paper presents a comparative study on the energy, exergetic and thermo-economic performance of a novelty thermal power system integrated by a supercritical CO2 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 (TIT, PHIGH, rP and TC) 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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Shaft pump power - effect of pipe network configuration
...
Obregon, Luis | 2020-05

Building design has often many engineering challenges to achieve the best possible energy and economic efficiencies. It is necessary to use technological tools capable of predicting with a high degree of accuracy the behavior of a pipe network system in order to obtain good designs that avoid problems in the future. This study is focused on the analysis of three pipe networks with different floors and the same configuration on each level. Four case studies have been developed in order to analyze the energy requirements and the outlet pressure of a pump for multiple pipe diameters, various floors, and fluid flow rates. The effects of the pipe diameter and the flow rate on the energy cost have been also analyzed. It has been observed that an increase in the flow rate in a pipeline of one inch of diameter causes a huge increase in the pump power when working on the net with a single floor. In addition, it has been found out that the higher the number of the floors is, the higher the pump powder is. However, this effect has not been significant when using pipelines with high diameters. Besides, it has been found out that the higher the number of the floors is, the higher the pressure drop in the system is. This effect is highly significant when using pipelines with small diameters. The total pump power cost had an exponential decay with the increase in pipe diameter.

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Listar por tema "Energy"

A comparative energy and exergy optimization of a supercritical-CO2 Brayton cycle and Organic Rankine Cycle combined system using swarm intelligence algorithms

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

Shaft pump power - effect of pipe network configuration

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A comparative energy and exergy optimization of a supercritical-CO2 Brayton cycle and Organic Rankine Cycle combined system using swarm intelligence algorithms

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

Shaft pump power - effect of pipe network configuration

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Listar por tema "Energy"

A comparative energy and exergy optimization of a supercritical-CO2 Brayton cycle and Organic Rankine Cycle combined system using swarm intelligence algorithms ﻿

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

Shaft pump power - effect of pipe network configuration ﻿

Envíos recientes

A comparative energy and exergy optimization of a supercritical-CO2 Brayton cycle and Organic Rankine Cycle combined system using swarm intelligence algorithms

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

Shaft pump power - effect of pipe network configuration

Portales Institucionales

A comparative energy and exergy optimization of a supercritical-CO2 Brayton cycle and Organic Rankine Cycle combined system using swarm intelligence algorithms

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

Shaft pump power - effect of pipe network configuration