Listar por tema "Working fluids"

An energy and exergy model for a hybrid multi-stage Brayton cycle solar thermal plant is presented, incorporating an arbitrary number of compression stages with intermediate cooling and expansion with reheating. In hybrid ...

This study presents detailed thermodynamic modeling of a supercritical Brayton cycle operating with carbon dioxide as a working fluid for electric power generation. The study incorporates a main compression intercooling ...

Energy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids
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Moreno Gamboa, Faustino | 2023-08-10

An energy and exergy model for a hybrid multi-stage Brayton cycle solar thermal plant is presented, incorporating an arbitrary number of compression stages with intermediate cooling and expansion with reheating. In hybrid operation, the cycle receives thermal energy from a solar concentration system of a heliostat field and a central tower complemented by reheaters and an external main combustion chamber of natural gas. The proposed model considers the irreversibility of the plant’s components, and direct solar radiation is estimated with the Daily Integration Approach model. The model is validated and implemented with the Solugas experimental plant parameters and is applied in Barranquilla, Colombia. Additionally, this work presents a comparative analysis of different plant configurations using air, carbon dioxide and helium as working fluids. Comparing the power, the energetic and exergetic efficiencies, and the destruction of exergy on an average day of the year, the maximum points of these variables are also found as a function of the pressure ratio. Observing that the twocompression-one-expansion CO2 cycle presents maximum fuel conversion rates and the slightest destruction of total exergy.

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Thermodynamic study of a supercritical carbon dioxide Brayton cycle based on main compression intercooling configuration
...
Orjuela Abril, Martha Sofia | 2021-06-09

This study presents detailed thermodynamic modeling of a supercritical Brayton cycle operating with carbon dioxide as a working fluid for electric power generation. The study incorporates a main compression intercooling configuration while elucidating the effect of operational parameters on the overall performance based on energy and exergy perspectives. The model was carefully validated with relevant authors. Moreover, two different optimization methodologies, namely particle swarm optimization and fmincom, are evaluated based on convergence criteria. The results demonstrated that the fmincom reduced the iteration time between 140 s - 180 s. The cycle pressure played a central role in the stability of the thermophysical properties of the working fluid. The energy and exergy efficiencies present a direct relation with the inlet temperature. The air cooling and regenerators represent the biggest contributor to exergy destruction, whereas the compressors featured minimal impact on the exergy degeneration. Overall, the proposed configuration demonstrated robust performance to implement with high-grade heat sources, especially in non-interconnected areas.

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Listar por tema "Working fluids"

Energy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids

Thermodynamic study of a supercritical carbon dioxide Brayton cycle based on main compression intercooling configuration

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Energy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids

Thermodynamic study of a supercritical carbon dioxide Brayton cycle based on main compression intercooling configuration

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Listar por tema "Working fluids"

Energy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids ﻿

Thermodynamic study of a supercritical carbon dioxide Brayton cycle based on main compression intercooling configuration ﻿

Envíos recientes

Energy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids

Thermodynamic study of a supercritical carbon dioxide Brayton cycle based on main compression intercooling configuration

Portales Institucionales

Energy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids

Thermodynamic study of a supercritical carbon dioxide Brayton cycle based on main compression intercooling configuration