Wenig, Florian

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Official Name
Wenig, Florian
Main Affiliation
Akademische Titel
DI, BSc
Email
florian.wenig@fh-burgenland.at
Scopus Author ID
56830581100
Status
staff

Research Outputs

2020 2020 2019 2019 2018 2018 2017 2017 2016 2016 2015 2015 0.0 0.0 0.5 0.5 1.0 1.0 1.5 1.5 2.0 2.0 2.5 2.5 3.0 3.0 3.5 3.5 4.0 4.0

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    Publication
      6  3
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    Publication
    Towards non-invasive temperature measurements in HVAC: A characterization and correction approach
    (IEEE, 2019-06)
    Wenig, Florian 
    ;
    Seidl, Christian 
    ;
    Derler, Bernhard 
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    Heschl, Christian 
    ;
    Sauter, Thilo 
    ;
    Treytl, Albert 
    The existing building stock within the European Union is responsible for a considerably huge amount of the total energy consumed. This has prompted legislative actions that focus on increasing the efficiency of Heating, Ventilation and Air Conditioning facilities by employing building automation and electronic monitoring systems. The fluid flow temperature in the hydraulic grid of a building is therefore an essential parameter to be measured, where clamp-on temperature sensors are often applied due to their simple and cost-effective installation. As the plumbing industry heads towards non-metal pipe materials with low thermal conductivity, the applicability of non- invasive measurement procedures diminishes. In this context, a characterization approach of non-invasive temperature measurements that is linked to a thermal resistance model is experimentally validated. Based on that, a correction algorithm to reduce the deviation between measured surface and the fluid flow temperature for steady state conditions is derived and tested. The presented approach provides sufficient characterization and correction performance, albeit several limitations have to be taken into consideration.
      423  1Scopus© Citations 1
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    Towards distributed enthalpy measurement in large-scale air conditioning systems
    (IEEE, 2015)
    Sauter, Thilo 
    ;
    Steiner, Harald 
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    Glatzl, Thomas 
    ;
    Hortschitz, Wilfried 
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    Wenig, Florian 
    ;
    Heschl, Christian 
    Air conditioning systems are among the major energy consumers in buildings. Energy-efficient operation of AC systems is an important step towards better energy management in building automation, but requires efficient monitoring of the energy or enthalpy flows within the AC installation, which is currently still difficult because of the lack of appropriate equipment. This paper introduces a distributed data acquisition system for large-scale AC systems based on low-cost flow sensors implemented by means of standard printed circuit board technology and interconnected via a wireless sensor network. A critical issue for the system installation is the placement of the sensors in the air ducts to obtain representative measurements of the air flow. To this end, extensive aerodynamical simulations are carried out to analyze the flow distributions in typical building blocks for air ducts, particularly with respect to turbulences. The simulation results are compared with experimental data from the literature and are shown to be reliable.
      145  1Scopus© Citations 7
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      228  833
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    Publication
    Exponential pattern recognition for deriving air change rates from CO2 data
    (Institute of Electrical and Electronics Engineers (IEEE), 2017)
    Wenig, Florian 
    ;
    Klanatsky, Peter 
    ;
    Heschl, Christian 
    ;
    Mateis, Cristinel 
    ;
    Dejan, Nickovic 
    A novel procedure for automated determination of air change rates from measured indoor CO2 concentrations is proposed. The suggested approach builds upon a new algorithm to detect exponential build-up and decay patterns in CO2 concentration time series. The feasibility of the concept is proved with a test run on synthetic data that shows a good reproduction of the previously defined air change distribution. The demonstration continues with test runs on CO2 datasets measured in the kitchen and the sleeping room of two residential buildings. The derived air change rates were within the expected distributions and ranges in both cases when natural or mechanical ventilation was used.
      255  52831Scopus© Citations 3
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    Publication
    Numerical and experimental characterization of a novel low-cost thermal air flow sensor
    (IEEE, 2017)
    Wenig, Florian 
    ;
    Heschl, Christian 
    ;
    Glatzl, Thomas 
    ;
    Sauter, Thilo 
    To enable highly efficient operation of large scaled ventilation systems a continuous measured and well located air flow monitoring for control purposes and energy management is needed. The air flow monitoring solution is targeting low manufacturing cost as well as sufficient accuracy when operating near complex duct flows like pipe bends and tees. Therefore, a novel, low-cost, thermal air flow sensor, which takes non-uniform velocity profiles into account, is presented and characterized due to its application in heating, ventilation and air conditioning systems. Extensive numerical simulations and experimental investigations in an operating ventilation system show reasonable results and prove basic feasibility of the suggested novel sensor concept.
      80  2Scopus© Citations 3