contributo per un uso razionale dellenergia contribution for a rational use of energy conferenza internazionale sulle tecnologie a risparmio energetico per il riscaldamento e il condizionamento international conference on energy saving technologies for heating and cooling Milano 2 marzo 2006 Milan, March 2nd, 2006

Ing. Giorgio Palazzi Direttore Unità Fonti Rinnovabili e Cicli Energetici Innovativi, ENEA Renewable Energy Sources and Innovative Energy Cycles Unit Director, ENEA La ricerca al servizio dellinnovazione e della competitività dellindustria nazionale nel settore del comfort abitativo. Esempi applicativi e progettuali Research for innovation and competitiveness of Italian industry in the field of residential comfort. Application and design examples

3 International ROBUR conference CONTRIBUTION FOR A RATIONAL USE OF ENERGY – Milan, 2 March 2006 Giorgio Palazzi ENEA

4 Qualification of ROBUR Absorption Machine under Near-Real Operating Conditions

5 Technical Specifications of the ROBUR Machine Model GAHP-A +2AY Type:Air/Water Layout: 1 Absorption Heat Pump +2 boiler Storage:300 liters of water (external hydronic kit) Regulation:On/Off (prevalence of AHP) Rated power:100 thermal kW Fuel:Natural gas

6 CAPOC 2 test system (simulated use) Use simulator Data acquisition

7 Experimental results: Impact of return temperature of hot water

8 Plant configuration Tank 2 m 3 240°C 190°C Min 170°C Heater GAHP 50 m 2

9 Solar field

10 Methodology Dynamic simulation study (TRNSYS code), 1000 m3 building in three different cities (Milan, Rome, and Palermo) 1 Absorption pump + solar panels 2 absorption pump 3 boiler + chiller

11 Results: energy consumptions 1. GAHP + solar collectors plant 2. GAHP only plant 3. Conventional plant

12 Environmental benefit GWP: Global Warming Potential of the proper refrigerant fluid, (Integration time horizon: 100 year), assuming one full discharge every 3 years and taking into account the weight of refrigerant fluid actually used in the system considered in this study

13 T = 35°, UR = 42% Solar collectors Heat storage C. I. PdC Water- Water 280 °C 180 °CDiathermic oil Chilled Water Hot water at 60-65° De-humidified air Building DEC unit Solar Cooling Summer operation Air T = 32°, UR = 40% T = 45°, UR = 15% T = 30°, UR = 25% T = 25°, UR = 45% T = 26°, UR = 60% T = 52°, UR =20% T = 20°, UR = 95% Air T = 37°, UR = 50%

contributo per un uso razionale dellenergia contribution for a rational use of energy conferenza internazionale sulle tecnologie a risparmio energetico per il riscaldamento e il condizionamento international conference on energy saving technologies for heating and cooling Milano 2 marzo 2006 Milan, March 2nd, 2006