1. Energy Environment & Sustainable Development Thematic Network on Energy in the Built Environment TRIPLESAVE JOR3-CT97-0172 INTEGRATED SYSTEM FOR DAYLIGHTING, NATURAL VENTILATION AND SOLAR HEATING Kai Sirén Helsinki University of Technology October 2000

2. Energy Environment & Sustainable Development Thematic Network on Energy in the Built Environment TRIPLESAVE JOR3-CT97-0172 PARTNERS Helsinki University of Technology FIN Nottingham University UK University of Porto PT Sulzer Infra Lab. CH Brian Ford & Ass UK Thermacore Ltd UK TIMESCALE 1. Feb.1998 - 31. July 2000

3. Energy Environment & Sustainable Development Thematic Network on Energy in the Built Environment TRIPLESAVE JOR3-CT97-0172 PROJECT OBJECTIVES The project aims to develop a unit combining light pipe technology and passive stack ventilation by utilising the light pipe as an exhaust stack. This system is further integrated with two different energy options, either for heating or for cooling.

4. Energy Environment & Sustainable Development Thematic Network on Energy in the Built Environment TRIPLESAVE JOR3-CT97-0172 An installed and tested prototype based on research and development of collection of light integrated controls of lighting controlled stack ventilation air flow enhancement thermosyphon cooling ACHIEVEMENTS An installed and tested prototype based on research and development of collection of light integrated controls of lighting controlled stack ventilation air flow enhancement thermosyphon cooling

5. Energy Environment & Sustainable Development Thematic Network on Energy in the Built Environment TRIPLESAVE JOR3-CT97-0172 EXPECTED BENEFITS Energy related LocationWeatherSPP [yr]EPP [yr]PSE [euro/kWh] computed computed computed target target target HelsinkiCold168.70.119 <10 <6 <0.17 ZürichModerate6.46.70.080 <8 <5 <0.15 LisbonSouthern6.24.50.054 <6 <4 <0.13

6. Energy Environment & Sustainable Development Thematic Network on Energy in the Built Environment TRIPLESAVE JOR3-CT97-0172 EXPECTED BENEFITS User related Ergonomic Institute, Berlin

7. Energy Environment & Sustainable Development Thematic Network on Energy in the Built Environment TRIPLESAVE JOR3-CT97-0172 CONCLUSIONS the developed LVP concept seems to function satisfactorily a static collector seems not to be the right concept for the LVP the profitability of the LVP varies from country to country a major potential for applying the light- vent pipe seems to be in schools and offices the LVP concept as a whole is not finalised yet and needs some additional development