TY - JOUR AU - Czétány, László AU - Vámos, Viktória AU - Horváth, Miklós AU - Szalay, Zsuzsa AU - Mota-Babiloni, Adrián AU - Deme Bélafi, Zsófia AU - Csoknyai, Tamás TI - Development of electricity consumption profiles of residential buildings based on smart meter data clustering JF - ENERGY AND BUILDINGS J2 - ENERG BUILDINGS VL - 252 PY - 2021 PG - 19 SN - 0378-7788 DO - 10.1016/j.enbuild.2021.111376 UR - https://m2.mtmt.hu/api/publication/32215198 ID - 32215198 N1 - Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Building Services and Process Engineering, Műegyetem rkp 3, Budapest, 1111, Hungary ISTENER Research Group, Department of Mechanical Engineering and Construction, Universitat Jaume I (UJI), Castelló de la Plana, E-12071, Spain Export Date: 23 September 2021 LA - English DB - MTMT ER - TY - CONF AU - Horváth, Miklós AU - Czétány, László AU - Vámos, Viktória TI - Occupant Behaviour Profile Development based on Smart Meter Data T2 - 5th International Symposium on Occupant Behaviour PY - 2020 SP - 15 EP - 15 PG - 1 UR - https://m2.mtmt.hu/api/publication/32549604 ID - 32549604 LA - English DB - MTMT ER - TY - CHAP AU - Vámos, Viktória AU - Czétány, László AU - Horváth, Miklós AU - Csoknyai, Tamás ED - Sikula, Ondrej ED - Bartak, Martin TI - Energy Consumption Cluster Analysis In Hungarian Buildings T2 - Simulace budov a techniky prostredi 2020 PB - IBPSA-CZ CY - Brno SN - 9788090742314 PY - 2020 SP - 101 EP - 106 PG - 6 UR - https://m2.mtmt.hu/api/publication/31790369 ID - 31790369 LA - English DB - MTMT ER - TY - JOUR AU - Vámos, Viktória AU - Czétány, László AU - Horváth, Miklós AU - Csoknyai, Tamás TI - Gas Consumption Analysis for Educational Buildings JF - VYTAPENI VETRANI INSTALACE J2 - VYTAPENI VETRANI INSTALACE VL - 29 PY - 2020 IS - 6 SP - 327 EP - 331 PG - 5 SN - 1210-1389 UR - https://m2.mtmt.hu/api/publication/31787236 ID - 31787236 N1 - Export Date: 20 January 2021 Correspondence Address: Vámos, V.; Budapest University of Technology and Economics, Faculty of Mechanical Engineering, Department of Building Services and Process EngineeringHungary; email: vamos@epget.bme.hu AB - A vast energy consumption database is available in the framework of the research project entitled “Large Scale Smart Meter Data Assessment for Energy Benchmarking and Occupant Behaviour Profile Development of Building Clusters”. The database contains consumption data for approximately 10,000 buildings. Amongst the smart metered buildings, there are both residential and non-residential types. This research aims to identify different consumer groups and energy consumption profiles for various building types. For this study, a small sample was selected, which includes 76 school buildings. The energy consumption data are examined by using different clustering techniques: K-means, Fuzzy K-means, and Agglomerative Hierarchical Clustering Methods. In this artic le, the current sta te of our research is summarised. LA - English DB - MTMT ER - TY - JOUR AU - Horváth, Miklós AU - Adams, J N AU - Deme Bélafi, Zsófia AU - Czétány, László AU - Szalay, Zsuzsa AU - Várnagy, S AU - Reith, András AU - Csoknyai, Tamás TI - Large scale smart meter data assessment for energy benchmarking and occupant behaviour profile development JF - IOP CONFERENCE SERIES: EARTH AND ENVIRONMENTAL SCIENCE J2 - IOP CONF SER EARTH AND ENVIRON SCI VL - 323 PY - 2019 IS - 1 PG - 11 SN - 1755-1307 DO - 10.1088/1755-1315/323/1/012121 UR - https://m2.mtmt.hu/api/publication/30821935 ID - 30821935 AB - This paper will present objectives and first results of the research project entitled “Large Scale Smart Meter Data Assessment for Energy Benchmarking and Occupant Behaviour Profile Development of Building Clusters,” implemented in the geographical scope of Hungary. The project seeks to utilize a new and unique opportunity for accessing and processing an enormous dataset collected by smart meters. Recently in Hungary, nearly 10 000 buildings have been equipped with smart meters within the “Central Smart Grid Pilot Project”. By means of advanced data analysis techniques, consumption trends and motivations of building users are being investigated. The aims are to help building designers and engineers design more energy efficient buildings at lower investment costs by avoiding system oversizing, and to obtain better knowledge about hourly, daily and monthly energy consumption trends. Furthermore, standard net demand values for normative energy calculations can be updated and specified more precisely since consumption habits change with time and depend on the region. LA - English DB - MTMT ER - TY - JOUR AU - Czétány, László AU - Láng, Péter TI - Légcsatorna-hálózat méretezési módszerei JF - MAGYAR INSTALLATEUR J2 - MAGYAR INSTALLATEUR VL - 28 PY - 2018 IS - 5 SP - 32 EP - 34 PG - 3 SN - 0866-6024 UR - https://m2.mtmt.hu/api/publication/3415489 ID - 3415489 LA - Hungarian DB - MTMT ER - TY - THES AU - Czétány, László TI - Air Supply Ducts with Varying Rectangular Cross Section Providing Uniform Outflow (Változó téglalap-keresztmetszetű egyenletes befúvást biztosító légcsatornák) PB - Budapesti Műszaki és Gazdaságtudományi Egyetem PY - 2018 SP - 144 UR - https://m2.mtmt.hu/api/publication/3412225 ID - 3412225 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Czétány, László AU - Láng, Péter TI - Discharge Coefficients for Circular Side Outlets JF - JOURNAL OF FLUIDS ENGINEERING-TRANSACTIONS OF THE ASME J2 - J FLUID ENG-T ASME VL - 140 PY - 2018 IS - 7 PG - 14 SN - 0098-2202 DO - 10.1115/1.4039117 UR - https://m2.mtmt.hu/api/publication/3330905 ID - 3330905 N1 - Funding Agency and Grant Number: Faculty of Mechanical Engineering at the Budapest University of Technology and Economics Funding text: The predoctoral scholarship of Laszlo Czetany was provided by the Faculty of Mechanical Engineering at the Budapest University of Technology and Economics. The support is gratefully acknowledged. Cited By :1 Export Date: 7 May 2021 CODEN: JFEGA Correspondence Address: Czetany, L.; Budapest University of Technology and Economics, Muegyetem rkp. 3., Hungary; email: czetany@epget.bme.hu AB - Fluid distributors are widely used in various industrial and ventilation applications. For the appropriate design of such distributors, the discharge coefficient has to be known to predict the energy and fluid distribution performance. Despite the vast amount of experimental data published, no generally applicable equations are available. Therefore, a new equation is presented for sharp edged circular side outlets, which can be widely used for calculating the discharge coefficient. The equation is developed by regression with non-linear least squares combined with genetic algorithm on experimental data available in the literature. The equation covers a wider range than the others presented in the literature. LA - English DB - MTMT ER - TY - BOOK AU - Garbai, László AU - Jasper, Andor AU - Czétány, László TI - Csőhálózatok hidraulikája. Állandósult áramlás TS - Állandósult áramlás PB - Akadémiai Kiadó CY - Budapest PY - 2017 UR - https://m2.mtmt.hu/api/publication/31157464 ID - 31157464 LA - Hungarian DB - MTMT ER - TY - JOUR AU - Czétány, László AU - Szánthó, Zoltán AU - Láng, Péter TI - Rectangular supply ducts with varying cross section providing uniform air distribution JF - APPLIED THERMAL ENGINEERING J2 - APPL THERM ENG VL - 115 PY - 2017 SP - 141 EP - 151 PG - 11 SN - 1359-4311 DO - 10.1016/j.applthermaleng.2016.12.112 UR - https://m2.mtmt.hu/api/publication/3165356 ID - 3165356 N1 - Cited By :13 Export Date: 20 September 2023 CODEN: ATENF Correspondence Address: Czetany, L.; Budapest University of Technology and Economics, Műegyetem rkp. 3., Hungary; email: czetany@epget.bme.hu AB - Abstract A simple 1D theoretical model is suggested, with which it is possible to design ventilation ducts that are capable of providing uniform air distribution on the outlets. Detailed analysis is conducted for rectangular ducts with constant height and variable width. Optimal geometry is described by the width profile. The non-linear differential equation derived from the 1D model is solved numerically. The influence of different dimensionless parameters on optimal geometry is investigated. The model is validated with experiments performed on a unique hydraulically smooth rectangular duct with optimized geometry. The measured flow distributions are uniform with acceptable accuracy. LA - English DB - MTMT ER -