Modeling and Hourly Time-Scale Characterization of the Main Energy Parameters of Parabolic-Trough Solar Thermal Power Plants Using a Simplified Quasi-Dynamic Model

Energies

Loreto Valenzuela¹  Eduardo Zarza¹  Manuel Pérez-García²  Ignacio Arias³  JoséAlfonsoRomero Ramos⁴  Rodrigo Escobar⁵ 

[1] CIEMAT, Plataforma Solar de Almería, Carretera de Senés km. 4,5, P.O. Box 22, E-04200 Tabernas-Almería, Spain;CIESOL Centro Mixto Universidad de Almería, CIEMAT, 04120 La Cañada de San Urbano Almería, Spain;Departamento de Ingeniería Mecánica, Facultad de Ingeniería, Universidad de Tarapacá, Avenida 18 de Septiembre 2222, Arica, Chile;Escuela Superior de Ingeniería, Universidad de Almería, 04120 Almería, España;Escuela de Ingeniería, Pontificia Universidad Católica de Chile, Vicuña Mackenna 4860, Santiago, Chile;

关键词: renewable energy;    solar energy;    heat transfer fluid;    parabolic-trough collector;    quasi- dynamic model;   

DOI  :  10.3390/en14010221

来源: DOAJ

【 摘 要 】

A simplified mathematical model of parabolic-trough solar thermal power plants, which allow one to carry out an energetic characterization of the main thermal parameters that influence the solar field performance, was evaluated through a comparison of simulation results. Two geographical locations were selected to evaluate the mathematical model proposed in this work—one in each hemisphere—and design considerations according with the practical/operational experience were taken. Furthermore, independent simulations were performed using the System Advisor Model (SAM) software, their results were compared with those obtained by the simplified model. According with the above, the mathematical model allows one to carry out simulations with a high degree of flexibility and adaptability, in which the equations that allow the plant to be energetically characterized are composed of a series of logical conditions that help identify boundary conditions between dawn and sunset, direct normal irradiance transients, and when the thermal energy storage system must compensate the solar field energy deficits to maintain the full load operation of the plant. Due to the above, the developed model allows one to obtain satisfactory simulation results; referring to the net electric power production, this model provides results in both hemispheres with a relative percentage error in the range of [0.28%–8.38%] compared with the results obtained with the SAM, with mean square values of 4.57% and 4.21% for sites 1 and 2, respectively.

【 授权许可】

Unknown