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Energy efficient control strategies in supermarket refrigeration systems.

Number: 1073

Author(s) : SCHULTE A., LARSEN L., FÖRSTERLING S., HEERUP C., TEGETHOFF W., ZÜHLSDORF B., KOEHLER J.

Summary

The evaporation pressure in a supermarket refrigeration system exhibits constant fluctuations around its setpoint. A significant part of this behavior is influenced by the controllers and their control actions. This holds true for the individual controllers on the display cabinets, as well as controllers on the compressor rack. As a result, complex interactions between the display cases and the compressor rack arise. These complex interactions can result in higher energy demands for the compressor rack.
A simulation model, that can represent the dynamics of real display cabinets and a compressor rack including all interactions relevant for the refrigeration system, is used to investigate different control strategies for the compressor rack and the display cabinets. The different control strategies are evaluated based on their influence on the energy consumption, as well as the influence on the number of compressor start/stops. Control strategies that reduce the fluctuations in the evaporation pressure also led to lower energy consumption on the compressor rack.
Additionally, field tests were carried out in a supermarket comparable to the simulation model. It could be seen that changing the control strategy reduces the fluctuations of the evaporation pressure. As a result, also a decrease in average compressor power was observed. The first measurements indicate that changing the control strategy reduces the compressor energy demand by more than two percent.

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Pages: 8 p.

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Details

  • Original title: Energy efficient control strategies in supermarket refrigeration systems.
  • Record ID : 30032524
  • Languages: English
  • Subject: Environment
  • Source: 8th IIR International Conference on Sustainability and the Cold Chain. Proceedings: June 9-11 2024
  • Publication date: 2024/06/11
  • DOI: http://dx.doi.org/10.18462/iir.iccc2024.1073

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