Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
COMPARATIVE STUDY OF DIFFERENT MODELS FOR CALCULATION OF DNI ON NATAL CITY
Submission Author:
Gabriel da Silva Lima , Turku
Co-Authors:
Gabriel Ivan Medina Tapia, Adeilson de Oliveira Souza
Presenter: Gabriel Ivan Medina Tapia
doi://10.26678/ABCM.ENCIT2016.CIT2016-0376
Abstract
The development of technologies for the benefit of solar energy has been highlighted in recent years due to its huge potential use for generating electricity. Among these technologies highlights the Concentrated Solar Power (CSP) that reflect the solar radiation to a specific point. Because these concentrators are subject to seasonal variation of solar irradiation is of great importance to measurement of such energy over a specific period. This paper presents the use of mathematical models to calculate the Direct Normal Irradiance (DNI) allowing of this way to quantify the availability of this energy in regions where there is not availability of measurement instruments. The calculation models take into account climatic and geographical characteristics of the analyzed region. The approach of sky-clean is used in all study models to calculate the solar irradiance. The mathematical models used are: HLJ (combination of models Hottel, Liu and Jordan), Kumar, Fu and Rich, Daneshyar-Paltridge-Proctor (DPP) and Meinel. It was performed a comparative study with experimental data obtained by CTGAS-ER. A high correlation and low error was detected with the Meinel and HLJ models and the experimental data to the city of Natal/Brazil.
Keywords
Direct Normal Irradiance, concentrated solar power, mathematical models
