Dave Redden, Refrigeration Innovations
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The project involved replacing a refrigeration plant destroyed in a fire, resulting in a store that has 25% more linear footage and over 40% more cool room storage. It utilized energy-efficient systems, including parallel compression and ejectors for sustainability, with significant power consumption savings demonstrated between 2015 and 2018-19. The findings confirm the effectiveness of sustainable CO2 systems in the Australian climate, making them the preferred choice for retailers moving forward.
Dave Redden, Refrigeration Innovations
- 2. IGA Beechworth with Ejectors
- 3. The Project scope • To replace the refrigeration plant that was destroyed in a fire at the store resulting in a total loss. • The store was rebuilt on the existing footprint but was to include 25% more linear footage and more than 40% more cool room storage above the original store. • Old store was running two racks on R404a. • Sustainability and energy savings were to be paramount in the design. • We included a holistic approach in that the refrigeration plant supplies cooling/heating to the store via BPHE’s and water/glycol loops.
- 4. Project options Based on the Clients requirements various options were looked into for an Energy Efficient Co2 system. The Following options were explored: • Parallel compression • Adiabatic Cooling • Ejectors
- 5. Project solution After evaluating options it was a given that Parallel compression was needed. Adiabatic was also An option taken up, but with a thirst for greater energy efficiency and based on manufacturers data Ejectors also where added to the Final solution
- 6. The system With a system design we approached Beijer Ref Australia & SCM Frigo Italy who brought the design to life. The project was awarded to MB Refrigeration who then went on to Install the Pack and upgrade the site.
- 7. Results • Results were gathered over the time from start up through to and including summer. • Since February solar panels have been added so those figures were not included in the following graph.
- 8. Ambient v’s Store Temp
- 10. 0 10000 20000 30000 40000 50000 60000 70000 80000 Beechworth Power 2015 KWh 2018/2019 KWh DIFFERENCE MONTH MAY JUNE JULY AUGUST SEPTEMBER OCTOBER NOVEMBER DECEMBER JANUARY FEBRUARY PERCENTAGE -13.52 -6.96 -4.5 -6.82 -4.8 -6.44 -2.86 -10.9 -11.16 -16.6
- 11. Conclusion • Showing the results by power consumption between the 2015 and 2018-19 figures has proven a good indication of real time power savings. • The results were calculated through actual power consumption and not the dollar figures due to large price rises in supply. • In short over that period the savings were in Kwh equated to a full month of running. • The evidence is clear, sustainable Co2 systems are a reality and can work in the Australian climate negating the so called Co2 equator. • The trans critical Co2 system is the system of choice for retailers for the foreseeable future.
- 12. Thanks to the Working Partners