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Simultaneous energy efficiency and acoustic evaluation of heat pump systems using dynamic simulation models.

Number: No 068

Author(s) : VERING C., KLINGEBIEL J., REICHL C., EMHOFER J., NURENBERG M., MÜLLER D.

Summary

Heat pumps are a key technology in Germany’s energy system transformation process for achieving the federal government’s environmental goals. A crucial factor, increasing heat pump’s comfort, is its acoustics. Air-to-water-heat pumps need a compressor and a fan to operate efficiently. Both components have sound emissions that can be disturbing regarding humans’ psychoacoustics. Thus, it is necessary to develop energy efficient and quiet heat pumps. Within this work, we show that it is possible to estimate energetic and acoustic performance of heat pumps in dynamic simulation models simultaneously. Therefore, we link the Sound Source Extension Library to a dynamic heat pump simulation model, designed using the AixLib. The acoustic signatures of compressor and fan are coupled to their corresponding rotational speeds. Furthermore, we apply an Extremum Seeking Controller to operate the heat pump in an energy-acoustic optimum mode, which is specified by a predefined target function. By consequently optimizing the evaporator fan speed, we are able to reduce overall acoustic emission of the simulated heat pump by about 8 dB(A) while increasing its energy efficiency by about 4 %.

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Pages: 11 p.

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  • Original title: Simultaneous energy efficiency and acoustic evaluation of heat pump systems using dynamic simulation models.
  • Record ID : 30029961
  • Languages: English
  • Subject: Technology
  • Source: 13th IEA Heat Pump Conference 2021: Heat Pumps – Mission for the Green World. Conference proceedings [full papers]
  • Publication date: 2021/08/31

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