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CO2 solutions

27-28 February 2018

2

Summary

▪ Overview of regulations

▪ Overview of Rivacold solution

▪ CO2 – carbon dioxide

▪ CO2 Rivacold solution

▪ Case History

1.

▪ Overview of regulations

4

ENVIRONMENTAL RESPECT

TEWI = Total Equivalent Warning Impact

Reduction of TEWI is most important measure to fight global warning

TEWI = Direct emission + Indirect emission

RefrigerantLeakage

Energy consumption

Different types of applications have different composition of TEWI

Overview of regulations

5


GWP- Global protection warning

Gas GWP

3985

3922

2107

1825

1774

1430

1387

1397

2140

605

631

Gas GWP

7

4

3

3

1

0

High GWP

LowGWP

VeryLowGWP

6


F-GAS REGULATION (EU) No 517/2014 UPDATE 01/01/2015

7


Europe HFC reduction

8


World HFC reduction

2.

▪ Overview of Rivacold solutions

10

Overview of Rivacold solutions

ENVIRONMENTAL RESPECT

TEWI = Total Equivalent Warning Impact

Reduction o TEWI is most importatnt measure to fight global warning

TEWI = Direct emission + Indirect emission

Solution Solution

R744 - CO2 system R290 - Propane system

• Natural refrigerantCO2 R744 (GWP=1) Propane R290 GWP=3

• Leakage reduction• F-Gas regulation

• Increase energy effinciency

Rivacold Answers

11


12


Open Condensing Units

MT LT

Working Range (Te) 0°C ÷ -20°C -20°C ÷ -40°C

Compressor displacement 4,5 ÷ 14,3 cm3 5,6 ÷ 27,8 cm3

Cooling Capacity 355 ÷ 1018 WTa= 32°C (Te=-10°C)

195 ÷ 905WTa= 32°C (Te=-30°C)

Blocksystems for cabinets new SE

HT – 2 models MT – 4 models LT- 4 models

Working Range (Tc) +10°C ÷ +2°C +5°C ÷ -5°C -20°C ÷ -25°C

Compressor displacement 4 ÷ 4.8 cm3 4.5 ÷ 4.8cm3 10.1 ÷ 12,6 cm3

Cooling Capacity 488 ÷ 735 WTa= 30°C Tc=10°C

434 ÷ 650 WTa= 30°C Tc=5°C

458 ÷ 704 WTa= 30°C Tc=-20°C

Volumes 700/1400 700/1400 700/1400

Defrost Air Elec. HeaterHot gas

Elec. HeaterHot gas


Packaged systems ceiling mounting SF

Packaged systems wall mounting FA/FTMT BT

Working range (Tc) +5°C ÷ -5°C -15°C ÷ -25°C

Compressor power 1/2 ÷ 2x1 HP 1 ÷ 2x1,25 HP

Capacity 1038 ÷ 3358 WTa = 32°C (Tc = 0°C)

867 ÷ 2199 WTa = 32°C (Tc = -20°C)

MT BT

Working range (Tc) +5°C ÷ -5°C -15°C ÷ -25°C

Compressor power 1/2 ÷ 2x1 HP 1 ÷ 2x1,25 HP

Capacity 1069 ÷ 3382WTa 32°C (Tc= 0°C)

873 ÷ 2142 WTa 32°C (Tc= -20°C)

13

15


1

10

100

1000

Rivacold Rivacold Rivacold Rivacold

Condensing unit Mini-booster Booster Integrated system

max MT

max LT

max AC

kW

3.

▪ CO2 – carbon dioxide

17

CO2 Carbon dioxide

NOT inflammableNOT toxic

(security group A1)

Inert and compatible with many of the common used

materials to make therefrigeration circuits

Traditionalrefrigeration oil

use

High operative pressure and low

criticaltemperature

Excellentthermophysicalcharacteristics

Smallercompressors

Pipingdimensionsreduction

Allowed pressure drop at leastfive times higher than the values

tolerated by traditional HFCs

High density:• More efficient heat

exchangers• Small DT

AvailableLow –cost

Natural

18

CO2 Carbon dioxide

ph – diagram

Vapor

Liquid+ Vapor

Liquid

19

CO2 Carbon dioxide

For ambient temperature <15÷20°C the thermodynamiccycle is SUBCRITICAL

ph – diagram

20

CO2 Carbon dioxide

For ambient temperature >15÷20°C the thermodynamiccycle is TRANSCRITICAL

ph – diagram

21

CO2 Carbon dioxide

For ambient temperature >15÷20°C the thermodynamiccycle is TRANSCRITICAL

ph – diagram

Discharge pressure and temperature are independent variables.

With the same outlet temperature from the gas cooler, if the pressure increase then the cooling effect (ΔQ0) and compression work (ΔLc) increase.

An optimal pressure is needed. DQo Qo Lc DLc

35°C

22

CO2 Carbon dioxide

Users TN R

LT CO2

systemR

TN system

Users LT

ejectors

As main refrigerant

Heating discharged in environment

Heating discharged in other circuit

CO2 Units and Packs Cascade systems

As secondary refrigerant

Fluid refrigerated by chiller

Indirect System

Where is it possible to use CO2?

23

1

23

4 56

7

8

9 10

11

MT compressor

Cooling -Gas cooler

Intermediate pressure

Flash gas

Liquid

Mt evaporation

LT evaporation

LT compressor

1’

2 3

451

8

71’

6

69

10

11

CO2 Carbon dioxide

Transcritical booster system

24

1

23

4 56

7

8

9 10

11

Cooling Gas cooler

MT compressor

Intermediate pressureFlash gas

Liquid

MT evaporation

LT evaporation

LT compressor

1’

P compressor 2 3

451

8

71’

6

69

10

11

2p

2p

CO2 Carbon dioxide

Transcritical booster system with parallel compression

Efficiency +10%

A good solution for high ambient temperature

25

0°C

MT

-20°C

LT

- °C

TAP

- °C

H

R

Rack Sytem with ejector

80%20%

40%

100%

60%

1

23

4 56

7

8

9 10

11

1’

2p

LT Evaporator

MT Evaporator

LT Compressor

MT Compressor

ParallelCompressor

Gascooler

Intermediate pressure

Liquid receiver

2

2p

5

1’

4

6

3

10

11

Ejectors

P-h diagram

708kg/h708kg/h

90bar /

122°C

90bar /

37°C

36bar /

1.2°C

26bar /

13°C 36bar /

5°C

40%

Transcritical booster system with parallel compression and ejectors

CO2 Carbon dioxide

26

MT R134A + LT CO2 Cascade system

MT R404A + LT R404A

Parallel CO2 Booster system

CO2 Booster

191

238

128

Ref. Energy Heating Energy

Leak

[ton CO2/anno] [ton CO2/yr]

103

Direct

Indirect

Reference – Zone 3 (Rome)

Lower environmental impact than +18% @32°C ambient

CO2 Carbon dioxide

4.

▪ CO2 Rivacold solutions

28

CO2 Rivacold solutions

BoosterSystem

EjectorsParallel Compression

CO2nnext

NCS R290/R744

Cascade systems

R 134/R 744

CO2

Users TN

LT CO2

systemR

TN

system

Users LT

As main refrigerant

Heating discharged in environment

Heating discharged in other circuit

CO2 Units and Packs Cascade systems

As secondary refrigerant

Fluid refrigerated by chiller

Indirect System

29

Trascritical system

Cascade system131

70

4 CO2 pumped system

CO2 Rivacold in Europe


4

30


Descriptions, technical data and pictures are to be considered as a guide and not bilding. Rivacold reserves the right to change in whole or part, the specification detailed in this documentation. For constantly updated data, please refer to rivacold.com website.

Packs and

Integrated systems

• MT from 20 to152 kW

• LT from 5 to 33 kW

• Air conditioning

summer/winter up to 130 kW

Gascoolers• From 1 to 8 fans

• Up to 733 kW

• Up to 1000 diameter

Evaporators• From 1 to 5 fans

• Up to 61 kW

• Up to 500 diameter

CO2nnext

• BLDC

compressor

• MT 2,5/8,2 kW

• LT 2,2/6,7 kW

• Multi application

Multi CO2nnext

• From 2 to 4 BLDC

compressors

• MT only 11/41 kW

• MT+LT 9/30kW (MT) 2/9 kW (LT)

• LT 9/20kW

• Multi application

31

Gas coolersGeneral features

Design pressure

130 bar

• Electronic fans

• Copper- aluminium heat exchangers

• Casework made of galvanized metal sheet coated by epoxy power

• Connection made of steel

• For low noise applications

• Geometry 25 x 21,65 mm

• Copper Alloy K65 for high pressure


32


33

EvaporatorsGeneral features

Design pressure

75 bar

• Small footprint

• Electronic fan motors

• High efficiency blade

• Coil made of copper and aluminium

• Connection made of copper

• Aluminium made housing


34


Evaporators

35


CO2NNEXT is a range of condensing units and split systems using R744 transcritical variable speed BLDC hermetic compressor for medium and low temperature applications in convenient stores’ cold rooms, counters and wall display cabinets.

Thanks to a new generation of control for CO2 this easy to install system is designed for connecting up to 5 utilities.

Energy efficiency, eco-sustainability and perfect food conservation are guaranteed by Rivacold.

MEDIUM TEMPERATURE (TC -5;+5 °C)LOW TEMPERATURE (TC -25;-15 °C)

NATURAL GAS (GWP 1)

ENERGY EFFICIENCY

LOW NOISE

36


PRODUCT

Condensing Unit

HP=120 bar / LP=60bar

Self-supporting housing made of galvanized steel with epoxy powder

Low noise insulation (optional)

High efficiency BLDC compressor

Built-in gascooler with EC fan/s motor

Liquid receiver , PS=80bar

Dryer filter and sight glass

Liquid subcooling

Safety pressure switch

High and low pressure probe

Built-in power and control electrical box

Nitrogen pressurized system

PED I

Split Version

Cubic unit cooler with electrical defrost

Electronic termostatic valve fitted on evaporator

Remote room control panel

37


PRODUCT

MT Range CapacityTa 32 °C - EvaporationTemp -10°C

0

1000

2000

3000

4000

5000

6000

7000

8000

CO2NNEXT 30 CO2NNEXT 45 CO2NNEXT 67 CO2NNEXT 100

CA

PA

CIT

Y (

W)

Min. capacity

Max.capacity

38


PRODUCT

Thanks to the BLDC compressor and electronic controls,CO2NNEXT constantly monitors the internal temperature of coldrooms and regulates the refrigerant circuit and the thermostaticvalve so as to ensure the quick recovery of the desired storagetemperature and optimum food preservation

This technology allows to increase the shelf life of foods up to twodays longer than standard systems.

39


PRODUCT

The use of a natural gas such as R 744 (GWP 1) involves a directemission related to gas charge of 0,0032 (Ton CO2 equivalent) vs 11,77of a R 404 A unit.

Thanks to BLDC compressor, electronic controls and R 744 natural gas,CO2NNEXT saves 21% comparing to a R 404 standard unit

▪ Maximum energy saving

▪ Low environmental impact

-21%

NATURAL GAS (GWP 1)ENERGY EFFICIENCY

EFFICIENCY & ECO

40


PRODUCTUnit Coolers

Design pressure 75 bar

Small footprintEC fan motorsIP55High efficiency bladeCoil made of copper and aluminium Connection made of K65Aluminium made housing

41


PRODUCT

OPERATING SYSTEM

CONDENSING UNIT

EVAPORATOR

ELECTRONIC CONTROL

COLD ROOM

Liquid Line

Suction Line

42


CONNECTIONS with up to 5 utilities(cold rooms and/or

cabinets)

MULTIAPPLICATION

43


OPERATING SYSTEM

EASY INSTALLATION

A flexible, efficient and environmentally friendly system: the only thing to do is connect the liquid line and the suction line

to the evaporators and select the desired storage temperature

44


45


Cold climates < 8°C

Mild climates 8-15°C

Warm climates >15°C

Transcritical CO2 booster system

Transcritical CO2 booster system+

Parallel compression

Installation

Transcritical CO2 booster system+Parallel compression+Ejector

46


Large energy saving potential in warm ambient with ejector technology

Comparison made @ 32 °C

Comparison made @ 44 °C

5.

▪ Case history

48

Highly-efficient, full CO2 integrated systemWhere: 1500 sm in Monticello Brianza (Lc) ITALY

This natural gas system is ideal where the demand for heating and air conditioning is greater than the one for refrigeration. Indeed, in this installation, the system can supply a capacity of 90 kW for medium-temperature utilities, 20 kW for low-temperature utilities and up to 130 kW of air conditioning (both in summer cooling and winter heating mode), as well as 20 kW of DHW.

Special features: parallel compression and total heat recovery

-15% energy consumption vs standard CO2 booster

The smart solution of the gas cooler with built-in evaporator, combined with a customised control software developed by Rivacold, allows evaporation at higher temperatures, even on cold days. Unlike heat pumps, this system guarantees a much simpler management of defrosting and, above all, low consumption andexcellent heating performances in the winter, especially during initial opening hours, when the demand could be higher because the heating system is switched off at night, by recovering heat from the refrigeration system which is always up and running.

Case history

49

Case history

Where: Carrefour Logistic Centre, Nord-Ovest, Torino. ITALY

CO2 as the refrigerating fluid held at a constant temperature

Two packs operating on R134a (providing a total capacity of 800kW) are dedicated to refrigerate CO2 in its liquid state, which is held in a receiver located as part of the pump station. This process is entirely managed by a software designed by Rivacold. Two pumps, both inverter driven guarantee maximum safety and continual operation in the event of a pump failure. The CO2 in its liquid state arrives to evaporators without undergoing any expansion then returns to the receiver tank to supply the circuit again. In order to assure that the CO2 in the circuit is kept in its liquid state the saturated gas naturally forming in the heat exchangers is condensed through 8 plate heat exchangers (4 across each pack) giving heat to the R134a that is being expanded by high efficiency electronic valves.The system uses forced circulation of liquid CO2, compared with traditional indirect fluid systems such as those with propylene or ethylene glycol it offers many advantages. It is especially beneficial for larger capacity applications involving long pipe runs between the plant and areas to be refrigerated. Benefits include:▪ reduced refrigeration capacities and smaller pipe sizes;▪ low energy consumption for pumping; ▪ no temperature variation to the evaporators;▪ no problem of oil return;▪ no toxic fluid kept in the circuit, as is constantly

in a liquid state;▪ high efficiency thermal exchange.

Pumped system

THANK YOU

presentazione standard di powerpoint - prozon.org.plprozon.org.pl/files/file/cr/13.rivacod.pdf ·...

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