Discover the GA ACF TechnologyGas Absorption Chillers

Gabrio GiubertiExport Area Manager

Federico MoriniPre Sales Engineer

Our success factors:InnovationServiceSocial Responsibility

Facts:- Founded in 1956- Approx. 200 employees- R&D investment 7 %

Robur facts & figures

Robur facts & figures

HeadquarterRobur SpA

BranchRobur Corporation

Commercial presence in more than 50 Countries worldwide

BranchRobur GmbH

ROBUR ABSORPTION TECHNOLOGY

Robur absorption chillers are appliancesproducing cold water through a thermodynamiccycle directly activated by Natural Gas/LPG

A BIG OPPORTUNITY FOR WARM & HOT CLIMATES:

Main features of the absorption technologyo WATER-AMMONIA ABSORPTION CYCLE RECOVERING HEAT FROM

OUTSIDE AIR AS LOW AS -20°C AND/OR PRODUCE COOLING WITHEXTERNAL AIR UP TO +50°C

o DIRECT PRIMARY ENERGY INPUT: Natural Gas/LPG

o PROVEN TECHNOLOGY WITH HIGH RELIABILITY: SUBSTANTIALLY NO MOVING PARTS

o EXTREMELY LOW ELECTRICAL POWER CONSUMPTION: LESSTHAN 0,9 kW FOR 17,7 KW OF COOLING OUTPUT ANDELECTRIC POWER DEMAND IS REDUCED BY 86%

o NO WATER CONSUMPTION AND NO NEED OF COOLING TOWERS

o ENVIRONMENTAL FRIENDLY: AMMONIA IS A NATURAL REFRIGERANT WITH NO IMPACT ON GREENHOUSE EFFECT AND OZONE LAYER

o NO IMPACT ON INFRASTRUCTURES: NO NEED OF HUGEINVESTMENTS FOR NEW POWER PLANTS AND POWERGRID

Main features of the absorption technology

o A BACKUP ELECTRIC GENERATOR CAN EASILY SUPPORT THE ELECTRICPOWER CONSUMED BY THESE UNITS (IN CASE OF POWER CUTS)

Robur absorption technology has been developed since the sixties, starting from original patents of the beginning of the twentieth century (also by Albert Einstein, among others).

A proven and patented technology

condenser

evaporator

HEAT

HEAT

HIGH PRESSURE

LOW PRESSURE

compressorENGINE or ELECTRICITY

COMPRESSION CHILLER

evaporator

HEAT

HEAT

HIGH PRESSURE

LOW PRESSURE

compressor

condenser

ELECTRICITY

HEAT

FUEL

absorber

generator

Primary energy input

pump

Useful effect

ABSORPTION CHILLER

• Water-ammonia sealed circuit :no top-up, no drain, extremely simple maintenance; • Natural refrigerant : no CFC, HCFC, HFC;• One single moving component (solution pump) : very high reliability;•Low electrical consumption:1/10 of an equivalent electrical chiller

The absorption chiller technology

A different type of absorption technology

Water/Ammonia Lithium Bromide/Water

• Refrigerant is ammonia

• Pressurized system• Air condensed

• Reversible

• Refrigerant is water• Vacuum system

• Water condensed (cooling tower)• Cooling only

Up to 49% of the overall electricity demand of a

typical house

Electrical saving

66% of the electricity demand for HVAC

88% of saving compared to an electrical chiller of

equivalent cooling capacity

Savings of up to 88% of electricity demand compared to a traditional electrical system (less than 170 W per each TR).

Highly beneficial where power supply is a concern.

Particularly effective in power peak shaving during seasonal electrical demand: optimization of the installed electrical capacity.

Dramatically reducing the need for power supply in isolated off-grid applications: no need to connect remote locations.

Excellent in providing a reliable and stable air conditioning even where power supply may suffer from outages or instability (a backup gensetcan easily support the electric load of absorption chillers).

Extremely low electrical consumption

Saving on infrastructures

A massive deployment of the absorption technology would imply huge benefits on strategic infrastructures, avoiding large-scale

investments into new power plants or upgrade of the existing power grid.

One 1000 MW power plantis worth 1 bn USD

Saving on infrastructures

Eight high voltage eletricaltransmission lines

One gas pipeline

2,400,000 USD/km 150,000 USD/kmSaving 93%

Over 400.000 water-ammonia absorption chillers have been installed worldwide.

The absorption cycle is substantially static, with no moving parts, therefore extremely reliable, with long life-cycle.

The sealed circuit, in welded construction, is designed to be maintenance free (refrigerant charge for life). Overall maintenance costs very low.

The modular approach provides operational flexibility and further reliability and embedded redundancy (no back-up required).

No loss of refrigerant means no performance degradation over time.

High reliability

Electrical chillers are manufactured by assembling components from

different suppliers.

Maintenance schedule implies operations on the refrigerant.

Robur chillers have a sealed systemof welded construction and

maintenance free design(refrigerant charge for life).

No performance degradation over time

Refrigerant losses in electrical chillers

1. Refrigerant part:

2. Auxiliaries:

Maintenance of a Robur absorption chiller

• ZERO maintenance.

• Clean the combustion chamber.• Check belt and pulleys every 12000 hours of

operation.• Clean the coil.

Intrinsically suitable for high thermal lift, allowing a direct exchange with outdoor air, with no need for cooling

towers and the relevant water consumption.

Robur absorption technology is the winning solution where water is a valuable resource.

No water consumption

Absorption chillers dedicated to hot and humid climates, with extended operational range for high outdoor temperatures (HT versions, 50+ °C).

No cross-limitation between air temperature and chilled water temperature.

Large operational range

A natural refrigerant (ammonia) with no impact on greenhouse effect(Global Warming Potential, GWP=0) and no impact on the ozone layer(Ozone Depletion Potential, ODP=0).

No Fluorinated or Chlorinated refrigerants (F-gas), noxious for the environment and progressively banned worldwide.

The maintenance-free sealed circuit designand a completely welded construction, means no potential release of refrigerant.

An environmental-friendly refrigerant

Natural gas is a clean source of energy, respectful of the environment.

The direct use of Natural Gas in Robur absorption units dramatically reduces overall carbon emissions and the use of heavier fuels for power generation.

An environmental-friendly energy

Special versions (LB) to produce chilled water at negative temperatures (down to -10°C).

Industrial processes or refrigeration applications, for example in the food industry.

Negative temperatures

Negative temperatures consent possible “peak-shaving” solutions for cooling demand, through ice-storage systems.

GAS FIRED ABSORPTION CHILLER FOR NEGATIVE WATER TEMPERATURESACF-LB

GAS FIRED ABSORPTION CHILLERFOR HIGH EXTERNAL AIRTEMPERATURES ACF-HT

GAS FIRED ABSORPTION CHILLER FOR INDUSTRIAL USE ACF-TK

GAS FIRED ABSORPTION CHILLER WITH HEAT RECOVERY ACF-HR

GAS FIREDABSORPTION CHILLER ACF

Robur product portfolio

• Cooling capacity: 17 kW (5 TR)

• Cold water down to 3 °C

• Operational range 0/45 °C

• Nominal efficiency 71%

ACF60-00

• Cooling capacity: 17 kW (5 TR)

• Extended operational range, up to 50+ °C

• Cold water down to 5 °C

ACF60-00 HT (hot climate)

ACF60-00 HT

• Cooling output: 17.7 kW (5 TR)

• Overall efficiency: up to 180% (DHW + cooling)

• Free hot water: up to 70 °C

ACF60-00 HR (Heat Recovery)

The absorption chiller ACF HR can convert the heat rejected by theabsorber/condenser into DHW for free, with no additional consumption.

When no DWH is needed the fan can dissipate excess heat to air.

Watermains

DHW

Robur AY120 or other existing boiler

Cooling circuit

ACF60-00 HR: free DHW while cooling

• Chilled water down to -10 °C

• Refrigeration / ice-storage

• Cooling capacity: 13.3 kW (A35W-5)

ACF60-00 LB (Low Brine - negative temperature)

ACF60-00 TK (process applications)

• Technological applications

• All year round operation

• Operational range down to -12 °C

THE GAS ABSORPTION TECHNOLOGY ISWORLDWIDE ACKNOWLEDGED

The Gas Absorption Technology has been tested and certified byEBI, DVGW Forschungsstelle, VDE, KIT (Germany), Cetiat (France),California Energy Commission (USA), ENEA and RSE (Italy)

Ecodesign

RES Directive

EPBD

Ecolabel

F-GAS EC842/06

THE GAS ABSORPTION HEAT PUMP:FULLY IN LINE WITH CURRENT AND FUTURE NORMS

EcodesignRES Directive

EPBD

F-GAS EC842/06

Applications

• Hotels• Office buildings• Public buildings• Large residential buildings• Labour camps• Remote locations• Industry

Applications

Embassy Gardens – London

Embassy Gardens – London

Embassy Gardens – London

Embassy Gardens – London

• 3 towers• 50 ACF60-00

• 250 TR

Main features:• Power supply limitations.

• No change on distribution system.• Modularity and flexibility.

• Staged construction.

Department of Sanitation of New York

• 235,000 sq. ft.• 60 ACF60-00

• 300 TR

Main features:• Healthy and comfortable

environment.• Optimize

ventilation by directing clean air to

occupants.• Low first cost.

• Low energy use.• High reliability.

• Minimize maintenance and

service.

Clinique des OasisGhardaia (Algeria)

Clinique des OasisGhardaia (Algeria)

• 35 ACF60-00 HT• 175 TR

Main features:• Desert climate.• Power supply

limitations and instability.

• Large capacity electrical chillers already installed.

• Low cost gas.• Extended cooling

season.

Clinique des OasisGhardaia (Algeria)

Clinique des Oasis Ghardaia (Algeria)

• …and 70 more!

Funghi Valentina – Bologna (Italy)

Funghi Valentina – Bologna (Italy)

Funghi Valentina – Bologna (Italy)

• 22 ACF60-00 TK• 10 ACF60-00

HR• 160 TR

Main features:• Constant thermo - hygrometric conditions for mushroom cultivation.

• Hydronic cooling system with Air Handling Units (AHU’s).• Production of cold water and simultaneous free hot water for post-heating.• Vital reliability, modularity, operational continuity, small electrical back-up.• Saving up to 200 kW of electrical capacity compared to traditional systems.

• Low production costs.

Funghi Valentina – Bologna (Italy)

PRODUCTS AND BENEFITS: KEY CONCEPTS

COMMON FEATURES:o ALL MODELS ARE FOR OUTDOOR INSTALLATION. NO NEED FOR INDOOR

EQUIPMENT ROOM

o REDUCED MAINTENANCE: NO COMPRESSOR AND LOW NUMBER OF MOVING MECHANICAL PARTS; LONG LIFE CYCLE AND HIGH RELIABILITY

o VERY LOW ELECTRICAL CONSUMPTION – SAVING UP TO 86% OF ELECTRICITY COMPARED WITH A TRADITIONAL ELECTRICAL SYSTEM

o NO NEED OF ANY EXTRA ELECTRICAL ENERGY

o IDEAL TARGET FOR ISOLATED SITES (WITHOUT ELECTRICAL/GAS GRID CONNECTIONS) USING LPG

o IDEAL FOR PLACES SUBJECT TO ELECTRICITY SHORTAGES

o ABLE TO OPERATE ALSO WHEN EXTERNAL TEMPERATURE IS AT 50 °C.

o NO WATER CONSUMPTION: NO NEED OF EVAPORATIVE TOWER

o HYDRONIC DISTRIBUTION ALLOWS FOR A BETTER COMFORT INSIDE BUILDINGS AND IS A PREFERRED INSTALLATION STANDARD

o ORGANIZE PRE-SALES AND POST SALES TECHNICAL SERVICEo BECOME SKILLED ABOUT ROBUR TECHNOLOGYo DEMONSTRATE PREVIOUS EXPERIENCE WITH GAS-FIRED EQUIPMENTS o OR IN THE GAS INDUSTRYo DEVELOP LOCAL MARKET THROUGH A SALES NETWORKo ORGANIZE EVENTS/EXHIBITIONS/ETC IN ORDER TO PROMOTE OUR

TECHNOLOGYo GET IN TOUCH WITH LOCAL INSTALLERS, BUILDERS AND HVAC ENGINEERS

WHAT ROBUR IS LOOKING FOR?A SUITABLE AND RELIABLE PARTNER ABLE TO:

WHAT ROBUR IS LOOKING FOR?A SUITABLE AND RELIABLE PARTNER ABLE TO:

Thank you for your attention!