Thematic Network: Energy in the Built Environment

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INTEGRATED SYSTEM FOR DAYLIGHTING, NATURAL
VENTILATION AND SOLAR HEATING Kai
Sirén Helsinki University of Technology
October 2000
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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
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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.
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• 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

• 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

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EXPECTED BENEFITS Energy related Location Wea
ther SPP yr EPP yr PSE euro/kWh computed
computed computed target target
target Helsinki Cold 16 8.7 0.119 lt10 lt6
lt0.17 Zürich Moderate 6.4 6.7 0.080 lt8 lt5
lt0.15 Lisbon Southern 6.2 4.5 0.054 lt6 lt4
lt0.13
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EXPECTED BENEFITS User related
Ergonomic Institute, Berlin
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• 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