Testing laboratory HVAC. Test report No.: HP e

Transcription

1 Testing laboratory HVAC Test report No.: HP-62-e Objective: Sound measurements on an air distribution box and an air inlet Client: RoomAir AG Thurstrasse 14 Postfach 81 Frauenfeld Date: This report consists of 14 pages and may not be reproduced in abridged form without the explicit written permission of the testing laboratory HVAC. HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 1 von 9

2 Contents 1. Client Terms of reference Unit to be tested, date received, date tested Testing procedure Measured results Air inlet Level reduction air inlet with connection DN Flow noise air inlet with connection DN Air distribution box Level reduction with connection DN Concluding remark... 9 HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 2 von 9

3 1. Client Client: RoomAir AG Thurstrasse 14 Postfach 81 Frauenfeld Contact person: Mr. Remo Wolf 2. Terms of reference Level reduction and flow noise of an air distribution box and of an air inlet are to be measured with a connecting pipe of DN 9 in diameter. 3. Unit to be tested, date received, date tested Units to be tested: Air distribution box with main connecting pipe DN 16 and 2 x 6 distribution connective openings for ventilation pipes DN 7 or DN 9 Exterior dimensions 3 mm 46 mm 13 mm Date received: Date tested: 26-- to Air inlet with two connective options for ventilation pipes DN 7 or DN 9 Exterior dimensions h x b x d = 26 x 1 x 12 mm 4. Testing procedure See chapter testing installation HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 3 von 9

4 . Measured results.1. Air inlet.1.1. Level reduction air inlet with connection DN 9 Ambient conditions Air temperature 16 C Air humidity 2 % r.h. Atmospheric pressure 964 mbar Level reduction air inlet in one-third octave band (insertion loss) Connection Connection on side at bottom f De De Hz db db * * * Level reduction [db] Level reduction air inlet with connection 9 mm Connection on side Connection at bottom * The measurements at frequencies < Hz are given only for information. The reverberation chamber is appropriate for frequencies from Hz. HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 4 von 9

5 Level reduction air inlet in octave band (insertion loss) Connection Connection on side at bottom f De De Hz db db 63* * See note at Level reduction air inlet in one-third octave band Level reduction [db] Level reduction air inlet with connection 9 mm Connection on side Connection at bottom HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite von 9

6 .1.2. Flow noise air inlet with connection DN 9 Ambient conditions Air temperature 2 C Air humidity 2 % r.h. Atmospheric pressure 96 mbar Flow noise air inlet in one-third octave band Sound power level unweighted Sound power level A-weighted Volume flow 41 m 3 /h 7 m 3 /h 41 m 3 /h 7 m 3 /h f Lw1 Lw2 Lw1(A) Lw2(A) Hz db db db(a) db(a) * * * Total * The measurements at frequencies < Hz are given only for information. The reverberation chamber is appropriate for frequencies from Hz. xy The marked values indicate the frequencies at wich the difference between the tested sound source (test unit) and the background noise is < db. These values mark the upper limit of the sound power level of the sound source. In the frequency bands > 2 Hz the differences between the sound source and the background noise are < 4 db and are not displayed. HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 6 von 9

7 Flow noise air inlet with connection 9 mm Sound power A-weighted Flow noise [db(a)] Flow noise air inlet in octave band Volume flow 41 m3/h Volume flow 7 m3/h Sound power level unweighted Sound power level A-weighted Volume flow 41 m 3 /h 7 m 3 /h 41 m 3 /h 7 m 3 /h f Lw1 Lw2 Lw1(A) Lw2(A) Hz db db db(a) db(a) 63* Total * and xy see note at Flow noise air inlet in one-third octave band Flow noise [db(a)] Flow noise air inlet with connection 9 mm Sound power A-weighted Volume flow 41 m3/h Volume flow 7 m3/h HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 7 von 9

8 .2. Air distribution box.2.1. Level reduction with connection DN 9 (insertion loss) Ambient conditions Air temperature 19 C Air humidity 8 % r.h. Atmospheric pressure 964 mbar Level reduction air distribution box in one-third octave band f De Hz db * * * Level reduction [db] Level reduction distribution box with connection 9mm * The measurements at frequencies < Hz are given only for information. The reverberation chamber is appropriate for frequencies from Hz. HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 8 von 9

9 Level reduction air distribution box in octave band (insertion loss) f De Hz db 63* * see note at Level reduction air distribution box in one-third octave band Level reduction [db] Level reduction air distribution box with connection 9 mm Concluding remark For the air inlet at the air distribution box the flow noises at volume flows < 41 m3/h would have been interesting. But it is not possible to measure the sound power levels at these volume flows with the current measuring installation. The measured results apply solely to the unit submitted for testing. Electronically recorded data will be stored for the duration of 3 years. The test report and any associated documents will be archived at the testing laboratory HVAC for the duration of years. During this time the client may inspect these documents in situ. The costs of providing any copies that may be required will be charged to the client. This test report was translated into English language on Horw, Andreas Odermatt, dipl. Ing. HTL Deputy Manager, testing laboratory HVAC Patrick Keller, dipl. Ing. HTL Research Associate HSLU T&A, Prüfstelle HLK / HP-62 / / Kep Seite 9 von 9