Features of the GAHP technology DGC Workshop GAHP March 28th - 2014 Luigi Tischer Strategic Business Director Robur SpA

Summary Operating principle Renewable energy Technology highlights Certified performance Efficiency Stability of performance Efficiency on primary energy No need for back-up Base load operation High flow temperatures Environmental performance Natural refrigerant Quietness Defrosting Low electrical consumption

GAHP: operating principle

RENEWABLE ENERGY recovered through PRIMARY ENERGY 4 4 4

GAHP technology Water-ammonia sealed circuit: no tip-up, no drain, extremely simple maintenance; Substantially a static system with only one moving part: very high reliability; Low electrical consumption: 2% of thermal output; Exhaust flue gas water vapour condensation: reduced energy losses in the exhaust gas; Natural refrigerant: no CFC, HCFC, HFC;

GAHP: certified performance Technology with certified performance

GAHP efficiency 7

Performance stability over outdoor temperature 8

Efficiency on primary energy

GAHP: back-up vs peak Gas absorption heat pumps make the back-up system redundant. EHP Boiler -15°C -5°C 0°C 5°C 10°C -10°C GAHP 10

GAHP in base load operation GAHP: back-up vs peak GAHP in base load operation 160 140 130 120 110 Boiler 100 Heating Load [kW] 90 80 Boiler 70 60 50 40 GAHP 30 20 10 October November December January Febtuary March April Month

GAHP: no need for back-up Flow temperature 60°C

GAHP: a wide application range GAHP-A: Air-water Gas Absorption Heat Pump Nominal efficiency up to 165% by means of heat recovery from external environment‏ Space heating up to 65°C and indirect production of Domestic Hot Water up to 70°C Suitable for radiators, fan coils, floor heating, DHW preparation Designed for applications in light commercial and collective residential

GAHP with annual performance of 1.3 GAHP: environmental performance 197 g CO2 per kWh 175 g CO2 per kWh EHP GAHP 48 kWh losses 37% Generation Efficiency Ca. 1 kWh losses GAHP with annual performance of 1.3 76 kWh Primary energy 28 kWh Electricity 76 kWh Gas 100 kWh thermal output Electric HP with SPF of 3,6 72 kWh from environment 25 kWh from environment

GAHP: Ecolabel ranking

Totally exempt from F-Gas current and future restrictions GAHP: natural refrigerant F-GAS EC842/06 Totally exempt from F-Gas current and future restrictions

GAHP: quietness 17

GAHP: Defrosting with no impact on comfort The appliance can operate even when coil is covered with ice. The defrosting cycle: - occurs not frequently - is quick - does not cut-off heating RETURN TEMPERATURE DELIVERY TEMPERATURE

GAHP: no impact on grids 19

Thank you for your attention 20