KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 1 Building Simulations - CFD Examples Kjeld Svidt Aalborg University.

Præsentationer af emnet: "KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 1 Building Simulations - CFD Examples Kjeld Svidt Aalborg University."— Præsentationens transcript:

1 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 1 Building Simulations - CFD Examples Kjeld Svidt Aalborg University

2 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 2 Focus on attached ceiling jet Jet velocity characteristics described by velocity decay constant and virtual origin of jet (isothermal flow only) Penetration depth of cold jet attached to the ceiling –10, 15 and 30 mm slot opening –  T approximately 10 and 20 °C –many pressure differences

3 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 3 Non-isothermal measurements Penetration depth: 55 experiments with different opening size, pressure difference and temperature difference

4 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 4 Non-isothermal measurements Penetration depth: 55 experiments with different opening size, pressure difference and temperature difference

5 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 5 Computerberegning af luftbevægelser

6 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 6

7 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 7

8 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 8

9 KJELD SVIDT, AALBORG UNIVERSITY CFD Model of Incineration Hall, Amagerforbrænding 67 m 50 m 21 m Displacement Ventilation Supply Case C-D Outdoor Air Supply Case E-H

10 KJELD SVIDT, AALBORG UNIVERSITY Comparison between Calculated and Measured Results - Amagerforbrænding Vertical Plane at Incineration Line Fill Temperature 52 o C 46 o C 40 o C 34 o C 28 o C 22 o C 16 o C 10 o C 35 o 43 o 34 o 12-18 o 30-35 o 53 o

11 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 11 Strømningsforhold - lokale strømninger omkring personer

12 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 12 Simulering af termiske mannequinner (1) Kilde: Erik Bjørn

13 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 13 Simulering af termiske mannequinner (2) Kilde: Erik Bjørn

14 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 14 Simulering af termiske mannequinner (3) Kilde: Erik Bjørn

15 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 15 Simulering af termiske mannequinner (4) Kilde: Erik Bjørn

16 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 16 Strømning omkring bygninger

17 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 17 Strømning omkring bygninger - åbning i kip, staldbygning

18 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 18 Kyllingestald opført 1997 - gulvareal ca. 2000 m 2 - 13 udsugningsventilatorer i taget - samlet luftydelse 180.000 m 3 /h Luftindtag i ydervæg

19 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 19 Computersimulering af strømningsforhold. Laboratorieopstilling med spaltegulv over gyllekanal.

20 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 20 Detaljer af spaltegulv og beregnede strømningsforhold

21 KJELD SVIDT, AALBORG UNIVERSITY Building Simulations - CFD 21 Elementer med en kompliceret geometri ønskes beskrevet som mere enkle elementer af hensyn til computerkraften