A CO2 dream solution for a supermarket – a concept case
Torben Funder-Kristensen, Head of Public Industry Affairs TFK@danfoss.com Danfoss – ATMOsphere Europe 2013
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Agenda
Danfoss – ATMOsphere Europe 2013
The project
Facts about the case
Description of the store refrigeration & HVAC system build up
Why CO2
The controls used in the concept
Actual status
Conclusion and next steps
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The Project
Total budget: ~6 mill €
Timeframe: 2009-13
ITRI
CREATIV project, performed under the strategic Norwegian research program RENERGI (195182/S60). The CREATIV is financially supported by the Research Council of Norway and several industry partners. Danfoss – ATMOsphere Europe 2013
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Facts about the case
Supermarket size: 700 m2 sales area
Compressor Capacity:
oC
YAT : 6.5 SAT : 14.0 oC
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MT: 3x 4KTC-10KI-40 -> 73 kW
LT: 1x 2MHC-05KB-40 -> 7 kW
Air Handling Unit : (New Design)
Heat recovery
Heating and cooling
Bypass of all devices not in use
PM motors
Heat management: (storage and distribution)
Tanks + indoor and outdoor concrete
Ref. System with heat pump function:
Heat from energy wells (4x170m)
Floor heating inside the store (0-60%)
Heated air from the AHU (0-100%)
Snow melting at entrance and goods delivery
Space cooling
Free cooling from energy wells
Additional sub cooling via refrigeration unit
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Why CO2? Theoretical COP based on pure thermodynamic properties
HFC or HC
Mature status as refrigerant for refrigeration – more than 2000 systems running in the EU
Heat recovery has shown to be a very good solution which is being implemented in many new stores
Beyond heat recovery there are more options to be exploited i.e. heat pump functions and combination with the HVAC system
Good opportunities for further efficiency optimisation using thermal buffering
CO2
Actual performance utilising CO2’s thermophysical properties
Actual performance utilising CO2’s thermophysical properties with heat recovery
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Overview of the integrated system concept
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Integrated Energy Concept REMA1000 Kroppanmarka 2013
HVAC
Free cooling
Goods terminal
FH 2:
V-5
Entrance
V-6
V-5
V-5
Floor heating
V-6
Air curtain
FH 1
V-6
Drycooler
Backup
FH 3/4/5 V-5
V-6 V-5
V-3
V-6
V-5
V-6 V-6
V-6
Energy Storage
V-6
V-6
GC I
Energy wells
GC II
H T
MT
H MT T
MT
Sub Cooler
R744 Booster
V-5
V-3
HP
DCV II
V-6
V-6
DCV I
V-5
HP-Valve V-3
EV V-5
V-5
V-5
Evap
MP ECV V-5
V-5
H LT T Danfoss – ATMOsphere Europe 2013
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Controls structure Optimise Energy efficiency or cost (System level) Optimise Energy efficiency ( sub systems ) Ensure additional service (Heating, heat storage, Snow melting)
Ensure Food Safety
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Actual status and close future activities
The supermarket has been open since 15th of August
All systems are performing as expected
The sub-system tuning is ongoing
Measurements + quality assurance on-going to document and double check more than 500 measurement points
Measurements are applied to tune and validate simulation models
Dynamic simulation tools, developed within CREATIV, will be applied to evaluate various control strategies Danfoss – ATMOsphere Europe 2013
Publication of findings in the near future:
www.danfoss.com; IIR Gustav Lorentzen Conference; www.R744.com; |9
Conclusion
An advanced energy integrated supermarket installation has been realised within the CREATIV project in Trondheim, Norway.
The energy sub-systems are interconnected and controlled to minimize the entire power consumption of the supermarket building.
Danfoss controllers manage & optimize:
Danfoss – ATMOsphere Europe 2013
Operation of the refrigeration system
Heat storage devices
Air Handling Unit
Heating systems
Besides being a show case for the Industry this system will be used to test and develop new advanced controls
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