Danfoss – ATMOsphere Europe 2013 | 1 | 1

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 | 2 | 2

Agenda

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

Danfoss – ATMOsphere Europe 2013 | 3 | 3

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 | 4 | 4

Supermarket size: 700 m2 sales area

Compressor Capacity:

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

Facts about the case

YAT : 6.5 oC SAT : 14.0 oC

Danfoss – ATMOsphere Europe 2013 | 5 | 5

Why CO2?

Theoretical COP based on pure thermodynamic properties

Actual performance utilising CO2’s thermophysical properties

Actual performance utilising CO2’s thermophysical properties with heat recovery

CO2

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

Danfoss – ATMOsphere Europe 2013 | 6 | 6

Overview of the integrated system concept

Danfoss – ATMOsphere Europe 2013 | 7 | 7

HT LT

HT

Floor heating

FH 1

FH 2:

FH 3/4/5

Energy wells

Evap

Su

b C

oo

ler

Fre

e c

oo

ling

Backup

GC I

R744 Booster

MT

HVAC

Integrated Energy Concept REMA1000 Kroppanmarka 2013

HP

MP

HP-Valve

DCV I DCV II

ECV

EV

Drycooler

HT MT

GC II

Air

curtain

Goods t

erm

ina

l

V-3

V-3

V-3

V-6

V-5

V-6

V-5

V-6

V-6

V-6

V-6

V-6

V-6

V-5

V-5

V-5

V-5

V-6

V-5

V-6

V-5

V-6

V-5

V-5

V-5

MT

Energy

Storage

V-6

V-5

En

tra

nce

V-5

Danfoss – ATMOsphere Europe 2013 | 8 | 8

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

Danfoss – ATMOsphere Europe 2013 | 9 | 9

The supermarket has been open since 15th of August

All systems are performing as expected

The sub-system tuning is on-going

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

Actual status and close future activities

Publication of findings in the near future: www.danfoss.com; IIR Gustav Lorentzen Conference; www.R744.com;

Danfoss – ATMOsphere Europe 2013 | 10 | 10

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:

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

Danfoss – ATMOsphere Europe 2013 | 11 | 11 | 11