A Novel Hybrid CSP-PV Power Plant Based on Brayton Supercritical CO2 Thermal Machines
Fecha
2023-08-23Autor
Estado
info:eu-repo/semantics/publishedVersionMetadatos
Mostrar el registro completo del ítemResumen
. A novel hybrid CSP-PV power plant is presented. Instead of the integration used in current
hybrid power plants, where part of the PV production is charged into the thermal energy storage
system through electrical resistors, the proposed system integrates both PV and thermal solar fields
using a high-temperature heat pump. Both the heat pump and the heat engine are based on Brayton
supercritical CO2
thermodynamic cycles. Such integration allows for charging the molten salt storage
as if a central tower receiver field supplied the thermal energy, whereas parabolic trough collectors
are employed. Unlike conventional hybrid plants, where the storage of PV production leads to a
decrease in power injected into the grid throughout the day, the power injected by the proposed
system remains constant. The heat engine efficiency is 44.4%, and the COP is 2.32. The LCOE for
a 50 MWe plant with up to 12 h of storage capacity is USD 171/MWh, which is lower than that of
existing CSP power plants with comparable performance. Although the cost is higher compared
with a PV plant with batteries, this hybrid system offers two significant advantages: it eliminates
the consumption of critical raw materials in batteries, and all the electricity produced comes from a
synchronous machine
A Novel Hybrid CSP-PV Power Plant Based on Brayton Supercritical CO2 Thermal Machines
Tipo de Actividad
Artículos en revistasISSN
2076-3417Materias/ categorías / ODS
Cátedra Rafael Mariño de Nuevas Tecnologías EnergéticasPalabras Clave
.Brayton supercritical CO2 power cycle; high-temperature heat pump; thermal energy storage; Carnot battery; CSP-PV hybrid power plant