Energy optimal control, monitoring and operation of supermarket refrigeration systems
The objective of the project is to reduce the energy consumption on supermarket refrigeration systems by means of improved control strategies including continuous energy monitoring and tools for optimized dimensioning. Further it is modelled how a super market refrigeration system can contribute to flexible power consumption. It is estimated by the partners that 20 to 50 % reduction in energy consumption could be achieved.
Phase 1. Determination of the baseline for optimization of the energy consumption for a supermarket refrigeration system with CO2. Setting up measuring program with coriolis flow meter and energy meters. Phase 2. Flow meter. Alternative ways to measure refrigerant flow is evaluated and compared to the coriolis flow meter from phase 1. Phase 3. The complete refrigerant plant is modeled for the analysis of the performance of the individual components. Soft ware tools are developed of for optimum design of compressor capacity steps related to the number and type of display cabinets and for calculation of pay back of new control algorithms and investments in energy saving modifications. Phase 4. Development of new control algorithms based on the results from phase 3. 4.1 Optimal floating set points. A global control strategy based on the time constants of the display cabinets makes it possible to reduce energy consumption without compromising the temperature quality for the food and the operating conditions for the plant. 4.2 Optimized gas cooler control. This important control for CO2 trans critical refrigeration systems is evaluated and possibly modified. 4.3 Monitoring energy efficiency and running conditions. Development of soft ware for implementing in control system for real time monitoring of component and plant performance with respect to energy and identifying faults due to fouling and malfunction of components. Phase 5. Results from phase 3 and 4 are implemented on one or more supermarkets and documented by a measuring program followed by analysis. Phase 6. Disseminating of results. The control algorithms will be incorporated in a commercial control system for super market refrigeration and the soft ware tools will be made freely available as downloads from the internet. The results will also be disseminated by seminars and publishing of papers
The objective of the project is to reduce the energy consumption on supermarket refrigeration systems by means of improved control strategies including continuous energy monitoring and tools for optimized dimensioning. Further it is modelled how a super market refrigeration system can contribute to flexible power consumption. It is estimated by the partners that 20 to 50 % reduction in energy consumption could be achieved
Key figures
Category
Participants
| Partner | Subsidy | Auto financing |
|---|---|---|
| ADVANSOR A/S | 0,24 mio. DKK | 0,16 mio. DKK |
| Danfoss A/S | 0,18 mio. DKK | 0,28 mio. DKK |
| Danmarks Tekniske Universitet (DTU) | 0,58 mio. DKK | 0,17 mio. DKK |
| Danmarks Tekniske Universitet (DTU) | 0,46 mio. DKK | 0,08 mio. DKK |
| FAKTA A/S | 0,05 mio. DKK | 0,07 mio. DKK |
| IPU | 0,26 mio. DKK | 0,17 mio. DKK |
| SUPER KØL A/S | 0,15 mio. DKK | 0,15 mio. DKK |
| SUPERGROS A/S | 0,05 mio. DKK | 0,07 mio. DKK |
| Teknologisk Institut | 0,47 mio. DKK | 0,70 mio. DKK |
Contact
Teknologisk Institut. Center for Køle- og Varmepumpeteknik
Gregersensvej 2
DK-2630 Tåstrup
www.teknologisk.dk
Heerup, Christian , 72202020, info@teknologisk.dk
Øvr. Partnere: Danfoss A/S; Danmarks Tekniske Universitet. Institut for Mekanisk Teknologi (DTU Mekanik); Danmarks Tekniske Universitet. Institut for Informatik og Matematisk Modellering (DTU Informatik); IPU Køle- og Energiteknik; Super Køl A/S; Advansor A/S; Fakta A/S; SuperGros A/S
