1. PASSIVE ARCHITECTURAL COOLING FOR THREE STOREY OFFICE BUILDING DESIGN CONCEPT
RTU Working group: KRISTAPS SAFRANOVS, JURIS SOROKINS, NATALY KUZNECOVA, JEKATERINA NAZAROVA, JANIS LUSIS ALEKSANDRS ZAJACS

2. PASSIVE BUILDING DESIGN PRINCIPLE
Conventional design Integrated design
SHAPE • SOLAR PATH • SUSTAINABILITY N S E W

3. BUILDING ENVELOPE Key Features: Structural support Thermal resistance
Controls
Aesthetic

4. BUILDING ENVELOPE
North facade
South facade

5. DAYLIGHT FACTOR
2-5%

6. ILLUMINATION OF ROOMS
December 24th
June 24th
March 24th

7. RIGA SUN PATH

8. INTERNAL COMFORT Comfort of the work environment: Solar gain
Glare (contrast)
North facade
South facade

9. EXTERNAL EXPOSURE FACTORS
Outside temperature
Climate
Solar radiation
Sun path
Wind

10. EXTERNAL EXPOSURE FACTORS
Wind pressure
Pv = 0.5 * ρl * v2ref
Pv –wind pressure, Pa;
ρl – air density , kg/m3.
Vref = Vmeteo * k * ha
Vmeteo – known wind speed in certain area, m/s;
k – factor depending on terrain (0,68 – open flat terrain, 0,21 – megalopolis);
h – height from the ground surface to the air intake, m;
a – factor depending on placement (0,17 – shore line, 0,33 - city).

11. Conclusions
Building is elipse-shaped which gives the best area of the envelope /building space ratio and adapts to the sun path;
Increased proportion of glazed facades benefits daylight factor and has a positive impact on residents' health, wellbeing and productivity;
At the same time this increase cooling load of working space, that's why office area is located on the North side
Building use reflected sun light instead of direct, which reduse glare effect;
The use of atrium contributes building sustainability by provision of natural ventilation;
The aim of the architectural passive cooling is achieved by setting correct lines of action – BUILDING SHAPE, SOLAR PATH, SUSTAINABILITY.

12. PASSIVE ARCHITECTURAL COOLING FOR THREE STOREY OFFICE BUILDING DESIGN CONCEPT
RTU Working group: KRISTAPS SAFRANOVS, JURIS SOROKINS, NATALY KUZNECOVA, JEKATERINA NAZAROVA, JANIS LUSIS ALEKSANDRS ZAJACS