Discover the GA ACF Technology Gas Absorption Chillers Gabrio Giuberti Federico Morini Export Area Manager Pre Sales Engineer
Robur facts & figures Our success factors: Innovation Service Social Responsibility Facts: - Founded in 1956 - Approx. 200 employees - R&D investment 7 %
Robur facts & figures Branch Robur GmbH Branch Robur Corporation Headquarter Robur SpA Commercial presence in more than 50 Countries worldwide
ROBUR ABSORPTION TECHNOLOGY
A BIG OPPORTUNITY FOR WARM & HOT CLIMATES: Robur absorption chillers are appliances producing cold water through a thermodynamic cycle directly activated by Natural Gas/LPG
Main features of the absorption technology o WATER-AMMONIA ABSORPTION CYCLE RECOVERING HEAT FROM OUTSIDE AIR AS LOW AS -20°C AND/OR PRODUCE COOLING WITH EXTERNAL 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: LESS THAN 0,9 kW FOR 17,7 KW OF COOLING OUTPUT AND ELECTRIC POWER DEMAND IS REDUCED BY 86%
Main features of the absorption technology o A BACKUP ELECTRIC GENERATOR CAN EASILY SUPPORT THE ELECTRIC POWER CONSUMED BY THESE UNITS (IN CASE OF POWER CUTS) 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 HUGE INVESTMENTS FOR NEW POWER PLANTS AND POWER GRID
A proven and patented technology 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).
COMPRESSION CHILLER HEAT HIGH PRESSURE condenser ENGINE or compressor ELECTRICITY evaporator LOW PRESSURE HEAT
Primary energy input ABSORPTION CHILLER HEAT FUEL HIGH PRESSURE generator condenser compressor ELECTRICITY pump absorber evaporator LOW HEAT PRESSURE HEAT Useful effect
The absorption chiller technology • 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
A different type of absorption technology Lithium Bromide/Water Water/Ammonia • Refrigerant is ammonia • Refrigerant is water • Pressurized system • Vacuum system • • Air condensed Water condensed (cooling tower) • • Reversible Cooling only
Electrical saving 88% of saving compared to an electrical chiller of equivalent cooling capacity 66% of the electricity demand for HVAC Up to 49% of the overall electricity demand of a typical house
Extremely low electrical consumption 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 genset can easily support the electric load of absorption chillers).
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 plant is worth 1 bn USD
Saving on infrastructures Eight high voltage eletrical One gas pipeline transmission lines Saving 93% 2,400,000 USD/km 150,000 USD/km
High reliability 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.
No performance degradation over time Electrical chillers are manufactured by assembling components from different suppliers. Maintenance schedule implies operations on the refrigerant. Robur chillers have a sealed system of welded construction and maintenance free design (refrigerant charge for life).
Refrigerant losses in electrical chillers
Maintenance of a Robur absorption chiller 1. Refrigerant part: • ZER O maintenance. 2. Auxiliaries: • Clean the combustion chamber. • Check belt and pulleys every 12000 hours of operation. • Clean the coil.
No water consumption 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.
Large operational range 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.
An environmental-friendly refrigerant 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 design and a completely welded construction, means no potential release of refrigerant .
An environmental-friendly energy 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.
Negative temperatures 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 consent possible “ peak-shaving ” solutions for cooling demand, through ice-storage systems .
GAS FIRED ABSORPTION CHILLER Robur WITH HEAT RECOVERY ACF-HR product portfolio GAS FIRED ABSORPTION CHILLER GAS FIRED FOR INDUSTRIAL USE ABSORPTION CHILLER ACF-TK ACF GAS FIRED ABSORPTION CHILLER GAS FIRED ABSORPTION CHILLER FOR NEGATIVE WATER TEMPERATURES FOR HIGH EXTERNAL AIR ACF-LB TEMPERATURES ACF-HT
ACF60-00 • Cooling capacity : 17 kW (5 TR) • Cold water down to 3 °C • Operational range 0/45 °C • Nominal efficiency 71%
ACF60-00 HT (hot climate) • Cooling capacity : 17 kW (5 TR) • Extended operational range, up to 50+ °C • Cold water down to 5 °C
ACF60-00 HT
ACF60-00 HR (Heat Recovery) • Cooling output: 17.7 kW (5 TR) • Overall efficiency: up to 180% (DHW + cooling) • Free hot water: up to 70 °C
ACF60-00 HR: free DHW while cooling The absorption chiller ACF HR can convert the heat rejected by the absorber/condenser into DHW for free, with no additional consumption. When no DWH is needed the fan can dissipate excess heat to air. DHW Robur AY120 or other existing boiler Cooling Water circuit mains
ACF60-00 LB (Low Brine - negative temperature) • Chilled water down to -10 °C • Refrigeration / ice-storage • Cooling capacity : 13.3 kW (A35W-5)
ACF60-00 TK (process applications) • Technological applications • All year round operation • Operational range down to -12 °C
THE GAS ABSORPTION TECHNOLOGY IS WORLDWIDE ACKNOWLEDGED The Gas Absorption Technology has been tested and certified by EBI, DVGW Forschungsstelle, VDE , KIT (Germany), Cetiat (France), C alifornia E nergy C ommission (USA), ENEA and RSE (Italy)
THE GAS ABSORPTION HEAT PUMP: FULLY IN LINE WITH CURRENT AND FUTURE NORMS Ecodesign Ecodesign RES Directive RES Directive EPBD EPBD Ecolabel F-GAS EC842/06 F-GAS EC842/06
Applications
Applications • Hotels • Office buildings • Public buildings • Large residential buildings • Labour camps • Remote locations • Industry
Embassy Gardens – London
Embassy Gardens – London
Embassy Gardens – London
Embassy Gardens – London • 3 towers Main features: • 50 ACF60-00 • Power supply limitations. • 250 TR • 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 Oasis Ghardaia (Algeria)
Clinique des Oasis Ghardaia (Algeria)
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