CLIMA 2016 - AALBORG May 25

Coupling HVAC system with environmentally friendly refrigeration system in food store

F.M.Visconti, M.Orlandi, D.Mazzola

Epta S.P.A

Clima 2016 – Aalborg May 25

CLIMA 2016 - AALBORG May 25

Coupling HVAC+R system

Adaptive Cabinet Control

Fully exploit the capabilities of shopping mall

overall systems and iBEMS to interact with

refrigeration plant

EPTA activity in CommONEnergy

CLIMA 2016 - AALBORG May 25

System description:

• Horizontal BLDC inverter driven compressor;

• Water condensed and inverter water cooled.

System advantages:• INVERTER AND ELECTRONIC EXPANSION VALVE: adaptation to changing cooling demand;• CHARGE REDUCTION AND FACTORY TEST: each cabinet is tested in factory;• RELIABILITY: each cabinet has its own unit;• CLOSED SHELL FOR THE COMPRESSOR UNIT: quitness in the store.

CO2 Water Loop system

CLIMA 2016 - AALBORG May 25

VARIABLE SPEED COMPRESSOR

August 2015.

Running percentage of compressor in three vertical LT cabinets

CO2 Water Loop system

CLIMA 2016 - AALBORG May 25

Thermal zoning

Radiant panels (floor or

ceiling) as an energy

saving alternative to full

air HVAC

CLIMA 2016 - AALBORG May 25

Location: Horwich, United Kingdom

700 m2 store

250 m2 sale area

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

WINTER TIME = Full heat recovery

In winter time Optimized trascritical CO2 plant allows 100%

heat recovery to provide store heating without the need of

additional heat sources.

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

Traditional solution Epta solution

The optimized transcritical CO2 system

WINTER TIME

Refrigeration

HVAC+EPTA

HVAC+R

CLIMA 2016 - AALBORG May 25

Gas cooler, used only in summer time

Door heatingHX 1

WINTER TIME

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

Gas cooler, used only in summer time

Door heating

Cassette and primary air heating

HX 1

HX 2

WINTER TIME

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

Gas cooler, used only in summer time

Door heating

Cassette and primary air heating

HX 1

HX 2

HX 3

Self cooling

WINTER TIME

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

SUMMER TIME

In summer time the same plant provides the necessary

cooling amount for refrigeration and for A/C with parallel

compression.

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

The optimized transcritical CO2 system

SUMMER TIME

Traditional solution Epta solution

Refrigeration

HVAC+EPTA

HVAC+R

CLIMA 2016 - AALBORG May 25

Gas cooler, used only in summer time and mid season

Store cooling

SUMMER TIME

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

In synthesis:

1) allows 100% heat recovery to provide store heating

without the need of additional heat from other sources;

2) give multi temperature heat recovery circuits to satisfy

different thermal loads;

3) allows store cooling without an external plant

4) allows plant control based on input from various thermal

sources, thus optimizing total efficiency

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

Optimized transcritical booster CO2 systemAdaptive control of thermal load using CO2 pressure variation

CLIMA 2016 - AALBORG May 25

HX 1

HX 2

HX 3

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

Cassette

Primary air

Door curtain

Optimized transcritical booster CO2 system

CLIMA 2016 - AALBORG May 25

Adaptive air flow

Radiation

CLIMA 2016 - AALBORG May 25

Air flow reduced in off-design (field) condition allows saving energy

Adaptive air flow

CLIMA 2016 - AALBORG May 25

SMART Grids are part of our future

Smart Appliances

CLIMA 2016 - AALBORG May 25

• http://www.eco-smartappliances.eu/

• EPEE* asked to include Commercial Refrigeration as “Smart Appliances”

Smart Appliances

*European Partnership for Energy and the Environment

CLIMA 2016 - AALBORG May 25

Household refrigeration

300 Million unit (EU 28) - > 50- 300 W

Smart Appliances, preparatory study*

*Preparatory study on Smart Appliances (Lot 33), 2015

CLIMA 2016 - AALBORG May 25

Commercial refrigeration

13 Million Unit (EU 28) - > 300 – 5000W

Smart Appliances, preparatory study*

*Preparatory study on Smart Appliances (Lot 33), 2015

CLIMA 2016 - AALBORG May 25

Smart Appliances

But the architecture is complex

And involves a lot of subjects

at various levels

Will be the challenge

for the next future

CLIMA 2016 - AALBORG May 25

Demand-response for refrigeration

Dynamic balance between energy demand and response.

Flattening energy peaks(e.g. store cold during night and use during day)

CLIMA 2016 - AALBORG May 25

Renewable energy overgeneration

Demand-response for refrigeration

Dynamic balance between energy demand and response.

Fast adapting to energy cost

CLIMA 2016 - AALBORG May 25

THANK YOU!