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Field testing of an advanced low-charge supermarket refrigeration system. US report C.

Author(s) : IEA HPP, ORNL

Type of excerpt: Book chapter

Summary

This US country report is part of the IEA Annex 26 final report (see Bulletin of the IIR, reference 2004-2602, 2005-2898 and this Bulletin, reference 2006-0822). A field test was conducted to compare the performance of multiplex and distributed supermarket refrigeration systems. Two supermarkets in the vicinity of Worcester, Massachusetts were the sites utilized for the field test. One store was equipped with a multiplex refrigeration system that had 3 compressor racks and air-cooled condensers. At the second store, a low-refrigerant-charge distributed refrigeration system was installed that consisted of 10 compressor cabinets. Heat rejection for the compressor cabinets was accomplished through water-cooled condensers piped to a fluid loop that used dry fluid coolers. The second store also had water-source heat pumps for space heating and cooling that were piped into the fluid loops. Both sites were instrumented to determine energy consumption, refrigeration and HVAC loads, and numerous system state points to characterize operation. Data were collected for approximately 18 months. A comparison of the performance of the two refrigeration systems was made based on the information gathered. The results showed that the multiplex refrigeration system used less energy and showed better EER than the distributed system. A TEWI comparison between the two refrigeration systems showed significant reductions in atmospheric CO2 generation by the distributed system despite added energy use. Test results also showed that the water-source heat pumps produced energy cost savings for store space heating by recovery of the refrigeration reject heat.

Details

  • Original title: Field testing of an advanced low-charge supermarket refrigeration system. US report C.
  • Record ID : 2006-0801
  • Languages: English
  • Source: Advanced supermarket refrigeration/heat recovery systems. Final report from Annex 26 of the IEA Heat Pump Programme. 2. Country reports [CD-ROM].
  • Publication date: 2003/05

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