EN 16445:2013

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Lüftung von Gebäuden - Luftverteilung - Aerodynamische Prüfung und Bewertung von Mischstromanwendungen: Nicht-isothermes Verfahren für einen KaltluftstrahlVentilation des bâtiments - Bouches d'air - Essais aérodynamiques et étalonnage pour applications de fluides mixtes pour les essais non-isothermes pour jet froidVentilation for buildings - Air diffusion - Aerodynamic testing and rating for mixed flow application: non-isothermal procedure for cold jet91.140.30VLVWHPLVentilation and air-conditioningICS:Ta slovenski standard je istoveten z:EN 16445:2013SIST EN 16445:2013en,fr,de01-junij-2013SIST EN 16445:2013SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 16445
February 2013 ICS 91.140.30 English Version
Ventilation for buildings - Air diffusion - Aerodynamic testing and rating for mixed flow application: non-isothermal procedure for cold jet
Ventilation des bâtiments - Bouches d'air - Essais aérodynamiques et étalonnage pour applications de fluides mixtes pour les essais non-isothermes pour jet froid
Lüftung von Gebäuden - Luftverteilung - Aerodynamische Prüfung und Bewertung von Mischstromanwendungen: Nicht-isothermes Verfahren für einen Kaltluftstrahl This European Standard was approved by CEN on 8 December 2012.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member.
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2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 12238, Ventilation for buildings — Air terminal devices — Aerodynamic testing and rating for mixed flow application EN 12239, Ventilation for buildings — Air terminal devices — Aerodynamic testing and rating for displacement flow applications EN 13182, Ventilation for buildings — Instrumentation requirements for air velocity measurements in ventilated spaces 3 Terms and definitions For the purposes of this document, the following terms and definitions apply: 3.1 supply air air entering a supply air terminal device from an upstream duct 3.2 exhaust air air leaving an exhaust air terminal device into a downstream duct 3.3 local measured mean air velocity
measured value of local airstream velocity as described in EN 12238 3.4 treated space enclosure served by an air distribution system; in this standard this is the test room SIST EN 16445:2013

0,5 m.s-1, etc., and the centre of the ATD 3.8 rise (for a supply air terminal device) vertical distance between the highest horizontal plane tangent to a specified envelope, such as
0,25 m.s-1, 0,5 m.s-1, etc., and the centre of the ATD 3.9 spread (for a supply air terminal device) maximum distance between two vertical planes tangent to a specified envelope, such as 0,25 m.s-1, 0,5 m.s-1, etc., and perpendicular to a plane through the centre of the ATD Note 1 to entry: There may be two different spreads, not always equal: One for the left side, the other for the right side (considered when looking at the treated space from the supply air terminal device). 3.10 distance to maximum spread distance from the centre of the ATD to the maximum spread determined 3.11 separation distance for cold jet with Coanda effect on ceiling, distance between the centre of the ATD and the point where the jet separates from the ceiling to drop 3.12 supply temperature temperature of air in supply ATD 3.13 room air temperature arithmetical average value of room air temperature measured in the occupied zone outside the envelope of the jet 3.14 temperature quotient ratio of the local temperature difference at point x and at the point of discharge θQ= ∆θx / ∆θ0 where
∆θ0
is the temperature difference between supply and room air ∆θx
is the temperature difference between the point of maximum velocity in the distance x from the ATD and room air SIST EN 16445:2013

Af sum of the minimum measured areas at each opening in the ATD through which air can pass 3.16 effective area
Ak effective area in the ATD measured as described in EN 12238 3.17 effective velocity
vk effective velocity in the ATD measured as described in EN 12238 4 Symbols (and abbreviated terms) Symbol
h h1 h2… Quantity Distances from ceiling at which measurements are made on vertical sections SI unit m ∆p Pressure difference (for a pressure difference device) Pa qv Volume rate of flow m3.s-1 v Velocity m.s-1 vx Maximum mean velocity at distance x from centre of supply air terminal device m.s-1 x Distance from supply ATD along the centreline of the jet
m xs Separation distance m X Throw m Y Spread
m Z Drop m ===θQ=Temperature quotient
∆θ0=Temperature difference between supply and room air K ∆θx=Temperature difference between the point of maximum velocity in the distance x from the ATD and room air K ρ=Density of air kg.m-3 Af Free area of the ATD m2 Ak Effective area of the ATD (k factor area) m2 Ad bR hR lR Area corresponding to the cross section of the nominal size of the duct to which the device is fitted (neck area)
Test room width (Figure 1) Test room height (Figure 1) Test room length (Figure 1) m2
m m m R Area parameter that relates to the effective size of the ATD (see EN 12238) m2 S Linear parameter that relates to the effective size of the ATD (see EN 12238) m vk Effective velocity in the ATD vkqA m.s-1 SIST EN 16445:2013

If heating elements are necessary, they shall be distributed uniformly over the floor area and covered by the floor. The surface temperature of the floor should not exceed the room air temperature by more than 4 K. The temperature of all other walls shall not differ from the air temperature of the test room by more than 1 K unless there are special requirements associated with full scale/mock up testing (e.g. solar gain through a window).
In any case, the sum of all room heat loads shall be equal to the cooling capacity of supply air to match the steady state conditions described in 6.2.2. Where high cooling performance is required (high ∆θ0), it might not be possible to achieve this with heat loads only on the floor. If this is the case, point heat sources may be used and shall be equally distributed over the test room floor. The details and locations of such heat loads shall be reported
When used for mock-up testing, representation of actual specified heat loads shall be used. 5.3 ATD isothermal characteristics Determination of the ATD isothermal characteristics shall be made according to EN 12238 including pressure drop, rise, drop, throw and spread. SIST EN 16445:2013
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