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Investigations of Heat Recovery in Different Refrigeration System Solutions in Supermarket

Investigations of Heat Recovery in Different Refrigeration System Solutions in Supermarket. Samer Sawalha and Yang Chen Department of Energy Technology Kungliga Tekniska Högskola Stockholm-Sweden. Project summary. Analysis methods. Detailed outline. Parallel CO2 transcritical (TR1).

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Investigations of Heat Recovery in Different Refrigeration System Solutions in Supermarket

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  1. Investigations of Heat Recovery in Different Refrigeration System Solutions in Supermarket Samer Sawalha and Yang Chen Department of Energy Technology Kungliga Tekniska Högskola Stockholm-Sweden Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  2. Project summary Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  3. Analysismethods Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  4. Detailed outline Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  5. Parallel CO2 transcritical (TR1) Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  6. Field measurement (TR2) Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  7. R404A/CO2 Cascade (CC)

  8. NH3/CO2 Cascade

  9. R404A conventional with SC

  10. Total COP comparison Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  11. Total COP comparison in HR mode Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  12. Medium and low temp. COP Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  13. Field measurement (TR2) Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  14. Total COP comparison-No condenser loop Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  15. Ongoing and future tasks • Estimate the heating capacities in an average size supermarket • Calculate the annual energy consumption of all the solutions combinations in different climates • Conclude the best refrigeration-heat recovery combinations for different climates • Experimental validation of CO2 systems in heat recovery mode in laboratory environment Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  16. Schematic of the CO2 test rig Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  17. Experimental main task • Overall system evaluation • Heat exchangers evaluation • Compressor losses and oil cooler capacity • System control Presentationsmaterial EFFSYS 2 dagen 2009-12-14

  18. Conclusions • Field measurements performed • Simulation models for several systems built • Test rig built and running • CO2 systems have potential with: • -floating condensing and recovering heat from de-superheating • -connected to heat pump at the condenser loop Presentationsmaterial EFFSYS 2 dagen 2009-12-14

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