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Case Fan Testing 2.0 – Improved Pressure Measurement and new Metrics for even better Reviews

Disclaimer: The following article is machine translated from the original German, and has not been edited or checked for errors. Thank you for understanding!

We have taken the feedback of the readers, evaluated it and improved it again together with an aerodynamicist. Afterwards, everything was recalibrated and the evaluation was extended by new chart graphics, which now finally cover the entire speed band. But more on that in a moment. Of course we noticed that our new measurements were taken up and copied by some competitors, however, politeness forbids to list names and also recognized errors here. Instead, one should always strive to simply do even better oneself and accept the challenge, because the imitators also show that we were the first to discover a real gap in demand!

We have only changed the measurement of the airflow and the sound pressure level in the chamber in small details, because they are still accurate enough to stand up well in professional counter tests. On the other hand, we have been able to improve the accuracy of static pressure, especially at lower pressures. Thanks to newly designed and self-printed funnels with special seals, it is now possible to work even better.

Improved measurement setup

Since my former employer is also one of those who now try to copy us, the angles in the 3D graphics and also in the following two photos are of course not quite right, because without knowing the exact dimensions of the funnel, a copy is virtually pointless and it also works only in a quite small tolerance range really quite accurate. We have also made comparative measurement series for this once again. In practice, the whole thing looks like the two pictures below.

The installation is trouble-free and the pressure receptacle now also closes perfectly thanks to a special seal. The rest is just a matter of calibration, which we also did again. It’s unlikely to get much more accurate with semi-professional methods. However, especially in printing, mistakes are quickly possible, which above all are not immediately recognizable. Even if the deviations are small, we will still measure all previous fans again and prepare them for the database.

 

 

New metrics and graphics

Apart from the fact that we now also record the minimum and maximum values for the flowing currents and the power consumption, we have fulfilled two further wishes of the readers and extended the measurement series in this respect. In order to be able to assess the fans really objectively, we first graduated the resulting volume flow and measured the sound pressure level in many individual steps. Fas result for a fan then looks like this in comparison to the reference fan:

We see that the increase in the sound pressure level of our test fan is not as even compared to the reference, but the level is still lower at a comparable volume flow. In addition, the fan tested and compared here also delivers a significantly higher airflow due to a 50% higher maximum speed, which in the end is bought with a similar sound pressure level as the reference fan, but whose performance is significantly lower.

And because we just wrote about the rotational speeds, there are also new comparative graphics for this, at the express request of the reader, by showing which rotational speeds are necessary to achieve a certain volume flow. In practice, we can now also see where the dip in the upper graph comes from in terms of volume, because there is a speed range (rather a smaller window) where the fan doesn’t perform so perfectly and spins higher to reach the desired CFM than a more even rise in the curve would have led us to expect.

 

In tomorrow’s fan test, we will include all these changes in an article for the first time, and our thanks go once again to the community for all the suggestions, the expert advisor for his competent help, and our Pascal, on whom the work will stick in the end. But we’re happy to do it all for our readers. 🙂

 

 

Lade neue Kommentare

ipat66

Veteran

221 Kommentare 199 Likes

Super !
Das Gute wird noch besser...:)

Diese Seiten sind einfach mit das Beste,was man (weltweit)finden kann.

Danke Igor,und danke an das Team !
Ihr macht einfach Laune!!!

Antwort 7 Likes

Pascal Mouchel

Moderator

202 Kommentare 236 Likes

Wir sagen Danke :)

Antwort Gefällt mir

RedF

Urgestein

1,472 Kommentare 544 Likes

Wow, da habt ihr echt noch einen draufgelegt.

Antwort 3 Likes

Pascal Mouchel

Moderator

202 Kommentare 236 Likes

Na klar müssen uns ja abheben vom Rest :D

Antwort 4 Likes

LEIV

Veteran

163 Kommentare 33 Likes

Freu mich da auch sehr drauf.
Will gar nicht wissen, wie viel Aufwand ihr da betreibt 😅

Antwort 3 Likes

B
Besterino

Urgestein

5,292 Kommentare 2,181 Likes

Für die Wunschliste: nötige Drehzahl/Spannung etc. angeben, um auf 200LFM (linear feet per minute) zu kommen - das ist so ein gängiger Wert im Umfeld von Enterprise-Hardware.

Antwort 2 Likes

Pascal Mouchel

Moderator

202 Kommentare 236 Likes

View image at the forums

Wir haben schon in der Glaskugel gesehen das so ein Wunsch kommt :D Abwarten wir sind noch net am Ende

Antwort 2 Likes

B
Besterino

Urgestein

5,292 Kommentare 2,181 Likes

Na das sieht doch schon vielversprechend aus! Für Doofe wie mich gerne wirklich die jeweiligen Werte für Verbrauch, Drehzahl und Lautstärke bei einem konstanten Airflow X - das ist für mich zumindest am aussagekräftigsten bei der Vergleichbarkeit der "Leistung".

Antwort 2 Likes

Pascal Mouchel

Moderator

202 Kommentare 236 Likes

wäre das alles nicht so ein extremer Aufwand würden wir gerne jede kleine Lücke schließen das mit der Abstufung ist eine Nummer für sich die ich nur Abends machen kann. Die dBa Messanlage ist so feinfühlig das ein Auto das vorbeifährt sich anhört wie ein Panzer.

Wir betreiben natürlich gerne diesen Aufwand und wollen uns abheben zum Rest. Deswegen hab ich das auch mit der Leistungsaufnahme noch mit reingepackt. Dauert nur bissel bis wir alles nach und nach drin haben. Klein wenig Geduld noch :) dann haben wir alles drin.

Antwort 4 Likes

Pascal Mouchel

Moderator

202 Kommentare 236 Likes

einen Großen 🤣 der sich aber Lohnt Thema Lüfter wurde am Anfang Unterschätzt wobei es sehr komplex ist und sich viele nur durch RGB blenden lassen und sich unter umständen das Falsche kaufen.

Wir räumen jetzt auf und ihr bekommt harte Zahlen und Fakten.

Antwort 7 Likes

Danke für die Spende



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About the author

Igor Wallossek

Editor-in-chief and name-giver of igor'sLAB as the content successor of Tom's Hardware Germany, whose license was returned in June 2019 in order to better meet the qualitative demands of web content and challenges of new media such as YouTube with its own channel.

Computer nerd since 1983, audio freak since 1979 and pretty much open to anything with a plug or battery for over 50 years.

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