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A Novel Approach to Enhance the Generalization Capability of the Hourly Solar Diffuse Horizontal Irradiance Models on Diverse Climates

  • Solar radiation data is essential for the development of many solar energy applications ranging from thermal collectors to building simulation tools, but its availability is limited, especially the diffuse radiation component. There are several studies aimed at predicting this value, but very few studies cover the generalizability of such models on varying climates. Our study investigates how well these models generalize and also show how to enhance their generalizability on different climates. Since machine learning approaches are known to generalize well, we apply them to truly understand how well they perform on different climates than they are originally trained. Therefore, we trained them on datasets from the U.S. and tested on several European climates. The machine learning model that is developed for U.S. climates not only showed low mean absolute error (MAE) of 23 W/m2, but also generalized very well on European climates with MAE in the range of 20 to 27 W/m2. Further investigation into the factors influencing the generalizability revealed that careful selection of the training data can improve the results significantly

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Author:Raghuram KalyanamORCiD, Sabine HoffmannORCiD
URN (permanent link):urn:nbn:de:hbz:386-kluedo-61751
ISSN:1996-1073
Parent Title (English):Energies
Publisher:MDPI
Document Type:Article
Language of publication:English
Publication Date:2020/09/17
Year of Publication:2020
Publishing Institute:Technische Universität Kaiserslautern
Date of the Publication (Server):2021/01/14
Issue:(2020) 13
Number of page:16
Source:https://www.mdpi.com/1996-1073/13/18/4868
Faculties / Organisational entities:Fachbereich Bauingenieurwesen
DDC-Cassification:6 Technik, Medizin, angewandte Wissenschaften / 620 Ingenieurwissenschaften und Maschinenbau
Collections:Open-Access-Publikationsfonds
Licence (German):Zweitveröffentlichung