Fluidos y Térmicas – FLUTER
https://repositorio.ufps.edu.co/handle/ufps/61
2024-03-29T05:11:39ZEnergy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids
https://repositorio.ufps.edu.co/handle/ufps/6741
Energy and exergetic performance analysis of a hybrid solar multi-stage Brayton cycle with different working fluids
Moreno Gamboa, Faustino; Nieto-Londoño, César
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.
2023-08-10T00:00:00ZAnalysis Of The Overturning Of Heavy Vehicles In The “The Adioses” Curve Of The Highway Pamplona-Cúcuta
https://repositorio.ufps.edu.co/handle/ufps/6645
Analysis Of The Overturning Of Heavy Vehicles In The “The Adioses” Curve Of The Highway Pamplona-Cúcuta
Moreno Contreras, Gonzalo Guillermo; Suarez C., Albert M.; PEÑA AVENDAÑO, IVAN CESAR; Moreno Gamboa, Faustino; Aperador Chaparro, William Arnulfo
Over time, it has been observed that accidents due to vehicle overturning in the “The Adioses” curve of the
Pamplona - Cúcuta road are a fairly frequent problem due to several factors such as: high speeds, absence of traffic signs,
driver maneuvers, among others. This is why this section of the road has been classified as a critical accident point. The
vehicles that are most affected are heavy vehicles (truck tractors), which due to their large size have a high gravity center,
which hinders their stability compared to other vehicles. Another important aspect that it is taken into account is the
characteristics of the road that can modify the load distribution in the vehicle. All these aspects are evaluated through a
case study which allows calculating the stability factor for a particular heavy vehicle and calculating the safe traffic speed
for this vehicle in the specified sector.
2021-09-01T00:00:00ZThermodynamics performance optimization of a hybrid solar gas turbine power plant in Colombia
https://repositorio.ufps.edu.co/handle/ufps/6577
Thermodynamics performance optimization of a hybrid solar gas turbine power plant in Colombia
Moreno Gamboa, Faustino; Acevedo Paez, Juan Camilo; Sanin-Villa, Daniel
A thermodynamic model is presented for evaluation of a solar hybrid gas-turbine
power plant. The model uses variable ambient temperature and estimates direct solar radiation
at different day times. The plant is evaluated in Barranquilla, Colombia, with a solar
concentration system and a combustion chamber that burns natural gas. The hybrid system
enables to maintain almost constant the power output throughout day. The model allows
optimizing the different plant parameters and evaluating maximum performance point. This
work presents pressure ratio ranges where the maximum values of overall efficiency, power
output, thermal engine efficiency and fuel conversion rate are found. The study is based on the
environmental conditions of Barranquilla, Colombia. The results obtained shows that optimum
pressure ratio range for power output and overall efficiency is between 6.4 and 8.3, when direct
solar radiation its maximum at noon. This thermodynamic analysis is necessary to design new
generations of solar thermal power plants.
2022-02-10T00:00:00ZEffect of a regenerator on hybrid solar gas turbine performance in Barranquilla, Colombia
https://repositorio.ufps.edu.co/handle/ufps/6544
Effect of a regenerator on hybrid solar gas turbine performance in Barranquilla, Colombia
Moreno Gamboa, Faustino; Acevedo-Paéz, J C; Sanin-Villa, D
A thermodynamic analysis of a hybrid gas turbine solar plant, represented in three
basic subsystems related to the power cycle, the combustion chamber subsystem, and the solar
concentrator subsystem, allows evaluating the performance of a hybrid cycle from a reduced
number of parameters, which include energy losses in each of its components. The solar radiation
values are estimated with an evaluated and validated theoretical model, the combustion chamber
uses natural gas as fuel and the numerical values of the system are taken from the Solugas
experimental plant in Spain. This work presents an integrated model that allows to estimate the
operation of a hybrid solar Brayton power plant in any place and day of the year. The evaluation
of the plant in Barranquilla, Colombia is shown from the influence of the regenerator has on the
plant performance and solar concentrating system. The results show that the regenerator can
increase the overall efficiency of the plant by 29% and allows reaching a maximum temperature
of the central receiver of the concentrator of 1044 K at noon, when solar radiation is maximum.
2021-01-01T00:00:00Z