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A modular thermal simulation tool for computing energy consumption of HVAC units in rail vehicles.

Author(s) : DULLINGER C., STRUCKL W., KOZEK M.

Type of article: Article

Summary

A method and its implementation for computing the energy consumption of the heating, ventilation and air conditioning (HVAC) unit of a light rail vehicle is presented. In order to simulate the energy consumption of the HVAC a modular structured simulation model is generated which provides access to the essential HVAC parameters. The simulation combines the HVAC system with a dynamic thermal vehicle model and includes operational and weather inputs. The vehicle model is obtained by a data-based system identification utilizing data from climatic wind tunnel experiments. Due to a gray-box modeling approach its parameters can be physically interpreted. Because of the small sampling time (Ts = 10 s) effects of transient switching operations can be observed. The holistic thermal simulation model is integrated in a user-friendly tool with graphical user interface (GUI). The tool enables an efficient processing of simulation data sets, visualization of time-domain results and computation of the annual energy consumption of the HVAC system. A tram line in Vienna was used to obtain real measurements for validation of the simulation model. The results of both short-time and long-time simulations yield realistic statements.

Details

  • Original title: A modular thermal simulation tool for computing energy consumption of HVAC units in rail vehicles.
  • Record ID : 30014879
  • Languages: English
  • Source: Applied Thermal Engineering - vol. 78
  • Publication date: 2015/03
  • DOI: http://dx.doi.org/10.1016/j.applthermaleng.2014.11.065

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