energies Article Analysis of Office Rooms Energy Consumption Data in Respect to Meteorological and Direct Sun Exposure Conditions Adam Kula 1 , Albert Smalcerz 2, * , Maciej Sajkowski 3 and Zygmunt Kami ´ nski 4   Citation: Kula, A.; Smalcerz, A.; Sajkowski, M.; Kami ´ nski, Z. Analysis of Office Rooms Energy Consumption Data in Respect to Meteorological and Direct Sun Exposure Conditions. Energies 2021, 14, 7590. https:// doi.org/10.3390/en14227590 Academic Editors: Chi-Ming Lai and Theocharis Tsoutsos Received: 30 August 2021 Accepted: 5 November 2021 Published: 12 November 2021 Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affil- iations. Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https:// creativecommons.org/licenses/by/ 4.0/). 1 Joint Doctoral School, Department of Industrial Informatics, Silesian University of Technology, 44-100 Gliwice, Poland; adam.kula@polsl.pl 2 Department of Industrial Informatics, Silesian University of Technology, 40-019 Katowice, Poland 3 Department of Power Electronics, Electrical Drives and Robotics, Silesian University of Technology, 44-100 Gliwice, Poland; maciej.sajkowski@polsl.pl 4 KAMSOFT S.A., 40-235 Katowice, Poland; zkaminski@kamsoft.pl * Correspondence: albert.smalcerz@polsl.pl; Tel.: +48-32-603-4133 Abstract: There are many papers concerning the consumption of energy in different buildings. Most describe residential buildings, with only a few about office- or public service buildings. Few arti- cles showcase the use of energy consumption in specific rooms of a building, directed in different geographical directions. On the other hand, many publications present methods, such as machine learning or AI, for building energy management and prediction of its consumption. These methods have limitations and represent a certain level of uncertainty. In order to compare energy consumption of different rooms, the measurements of particular building-room parameters were collected and analyzed. The obtained results showcase the effect of room location, regarding geographical direc- tions, for the consumption of energy for heating. For south-exposed rooms, due to sun radiation, it is possible to switch heating off completely, and even overheating of 3 ◦ C above the 22 ◦ C temperature set point occurs. The impact of the sun radiation for rooms with a window directed east or west reached about 1 ◦ C and lasts for a few hours before noon for the east, and until late afternoon for the west. Keywords: office building; energy consumption; meteorological parameters; data analysis; Poland 1. Introduction The aim of the paper is the development and verification of building energy con- sumption data collection and preliminary analysis methodology towards elaboration of algorithms for effective management of energy consumption. Electric use real measure- ments were utilized as the data source. The data was collected in 1-min intervals in selected office building rooms every day of 2020. The research subject was an office building named Gliwickie Ogrody Nauki of the KAMSOFT S.A. company located in Gliwice, Poland. The data regarding energy use of AC systems and heating for selected rooms located on dif- ferent sides of the building in combination to meteorological data from the year period was collected. The research problem of the paper concerns evaluation of the building energy and meteorological data availability and suitability in respect of data mining-based algorithms development for building energy management. The further research problem components were whether it is possible to determine dependencies among the data by statistical analysis in selected time periods, as well as extracting building rooms energy consumption prediction rules based on the collected data. As it comes from the follow- ing state-of-the-art analysis and building energy consumption analysis, prediction and management are important scientific and economic issues. Energetics is a basic element of national economics, and a warranty of strategic security of the country and the requirement for achieving balanced economic growth. Production and consumption of energy in Poland is ever growing; however, it requires constant Energies 2021, 14, 7590. https://doi.org/10.3390/en14227590 https://www.mdpi.com/journal/energies