1. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica NANO-HVAC GA no : 314212 Novel Nano-enabled Energy Efficient and Safe HVAC ducts and systems contributing to an healthier indoor environment Final Dissemination Conference Lavrio, 28 th August 2015 Surfaces disinfection methods and the use of Titanium Dioxide (TiO 2 ). LED technology for high performance, energy efficient and cost effective lighting systems Ioanna Fasaki, PhD – Dimitris Mantelis, Researcher

2. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica NanoPhos photocatalytic products SurfaShield C SurfaShield T SurfaShield G SurfaPaintKirei

3. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Properties of photocatalytic coatings under UV illumination Self Cleaning surfaces Self Sterilizing Superhydrophilic Air purification Continuous Action Environmentally friendly cleaning technology Only sunlight or artificial light is necessary

4. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Photocatalytic mechanism

5. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Photocatalytic mechanism on microbes Degradation of P. aeruginosa cells

6. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Photocatalytic mechanism on microbes Scanning Electro Micrographs of untreated E. coli cells and cells after 240 min on TiO 2 film

7. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica  Indoor Air Quality (IAQ) of buildings is highly affected by the air quality of the air inside a HVAC system  RH and temperature of a HVAC system could lead to the increase of pathogens and allergens  Air recirculation could introduce microbial load to the airstream of a HVAC system  Respiratory problem and diseases could affect the occupants of a building Why disinfection is needed in HVAC system?

8. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Lighting source  UV lamps types and characteristics  Variety of shapes (cylindrical, circular, u-shape, etc.)  Low and medium pressure mercury vapor lamps  Low pressure lamps emit at 253.7 nm – suitable for disinfection applications  Temperature dependence  Dependence of the conditions from the surroundings – RH and temperature of HVAC system could affect the performance of the UV lamps  Need of electronics for providing the necessary starting electrical voltage for ionizing the gas

9. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica  UV lamp drawbacks  Non-environmental friendly materials (use low-pressure mercury)  Typical rated life is in the range of 6000 to 10000 h of operation  Demanding environmental precautions for disposal  Complicated powering system – reliability issues Lighting source

10. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica  UV LED technology  Less energy consumption  Free of environmental hazardous heavy metals  No need of electric ballast for start-up operation, higher reliability  Higher lifespan  Smaller size, easier implementation into different duct shapes  Steady operation (no cooling effect due to airstream) Lighting source

11. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica  Comparison of UV LED and UV lamps efficiency  More than two times higher efficiency  Higher reliability – more than five times higher lifespan Lighting source LED efficiency vs UV lamps (Olivier Autina et al. 2013)

12. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Development of sprayable, self-adhesive, photocatalytic TiO 2 nanoparticles and antibacterial for filter coating Photocatalytic formulation  spraying or immersion  filter coating TiO 2 NANO-HVAC Project

13. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Coating of the HVAC filter

14. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica  “NANOHVAC” European research programm – Prototype Air Duct Disinfection system for HVAC applications Development of Air Duct Disinfection system (ADD) Conceptual Design Prototype ADD system

15. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Drawbacks in current airstream disinfection systems of HVAC installations  UV lamps use non-environmental friendly materials  Energy consumption is high and increase the total energy consumption of the HVAC system  Modern HVAC systems have complex geometries – Areas with no illumination may occur and installation process may need specialized personnel  The relatively short lifetime of UV lamps and the complex electronics reduce the reliability of disinfection systems

16. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Air Duct Disinfection system (ADD) Easy-to-install: No need for specialized personnel Flexibility in installation: The system can easily be fitted to new and existed duct systems Low energy consumption: New UVA LEDs consume small amount of energy. Maximum power less than 100W Extended reliability: LEDs and modern electronics increase robustness of the system Filters variation: The circular configuration could host different filter types and sizes can be place inside the system

17. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Incorporation of the coated filter and Air Disinfection Duct (ADD) in the DEMO NANO-HVAC system

18. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Sampling of the DEMO The internal air (and airborne microorganisms) of the mock-ups was sampled by means of the microbiological air sampler Duo SAS Microbiological Air Sampler

19. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Results of the integrated system: antimicrobial activity 93.3% reduction microbial load

20. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Results of the integrated system: removal of gaseous pollutants

21. August 28th, 2015, Lavrion Technological and Cultural Park (LTCP), Attica Thank you very much!!! Questions ?