Rapporten från etapp 1 - BeBo

Pressure Meter: Testo AG Germany
Model: Testo 521 Serial Number: 01362781/709
Sound Meter: Brüel & Kjær Precision Sound Level Meter Octave
Analyzer
Model: Typr 2215 Serial Number: 866138
Air Speed Meter: Alnor Compuflow Thermo-Anemometer
Model: GGA-65P Serial Number: 900181
Methodology and Procedure
Figure 2. Pressure meter
The first steps of the experiment were the calibration and performance measuring of the
equipment and instrumentation. Fan speeds and air flow performance were tested to
establish the range of the equipment. The tests conducted on the ducts are limited to
seven liters per second and twelve liters per second, to meet the indoor air quality
requirements.
The configuration of the ducts includes three parts: a three meter duct, a two meter duct
connected with a 90 degree right angle elbow joint, and a one meter duct connected with
a 90 degree boot joint. The entire system was put together and joints attached with duct
tape. For the experiment, two sizes of ducts are to be compared. The large area duct and
the small area duct have a cross sectional area of 3456 mm 2 and 2016 mm 2 respectively.
For the pressure tests, four holes
were drilled into the ducts to hold
pressure taps. The first hole was
drilled in the three meter duct 30
centimeters from the inlet. The
second pressure was set 15
centimeters from the outlet of the
three meter duct which then
follows the 90 degree right angle
elbow joint. The third hole is
situated 15 centimeters from the
outlet of the two meter duct, which
then follows the 90 degree boot
joint. Finally, a pressure tap was
drilled 15 centimeters from the
outlet of the one meter duct. The
reason behind the dimensions of
the pressure taps is to obtain a high
level of laminar flow for appro-
priate pressure measurements.
Length 3
Length 2
Length 1
Figure 3. Laboratory room with duct system setup
Bilaga 5 sid 2 (6)
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