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Application of a systematic approach to evaluate measures for increasing energy efficiency of an industrial refrigerating system.

Number: 0213

Author(s) : HAUSSER S., HUDJETZ S., BECKER M.

Summary

Energy efficiency is an important issue in the face of global climate change. Therefore, it is necessary to increase energy efficiency in indirect industrial refrigerating systems. For a chosen example system, a site inspection has been done and important information such as design parameters has been analyzed. The results of the investigations for this refrigerating system show, among other things, that the pumps in the brine and chilled water circuit are oversized. In this study, an optimization of the system is conducted and the energy efficiency is evaluated according to the German specification VDMA 24247-7 (2021).
The approach to evaluating the energy efficiency of the refrigerating system confirms the oversizing of pumps particularly in the brine circuit. In order to increase energy efficiency, one logical step is to reduce the rotational speed of the pumps. After this measure is realized in the refrigerating system, energy efficiency with recorded data is evaluated again. The results show that the effect on energy efficiency is dependent upon the operation point of the refrigerating system. Therefore, a suitable visualization method that complements energy efficiency with information concerning the operation point is chosen. With that, the energy efficiency and, furthermore, the cooling capacity provided and the electrical power used, can be visualized and analyzed together. The resulting increase in energy efficiency considering the brine circuit is from 3 to 5 in the assessed Total Energy Performance Factor (TEPF) due to the electrical power of the corresponding pump, which is reduced from 12 kW to 2 kW.

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Pages: 10 p.

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Details

  • Original title: Application of a systematic approach to evaluate measures for increasing energy efficiency of an industrial refrigerating system.
  • Record ID : 30031710
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0213

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