EN 14518:2005

SLOVENSKI STANDARD
01-februar-2006
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Ventilation for buildings - Chilled beams - Testing and rating of passive chilled beams
Lüftung von Gebäuden - Kühlbalken - Prüfung und Bewertung von passiven Kühlbalken
Ventilation des bâtiments - Poutres froides - Essais et évaluation des poutres froides
passives
Ta slovenski standard je istoveten z: EN 14518:2005
ICS:
91.140.30 3UH]UDþHYDOQLLQNOLPDWVNL Ventilation and air-
VLVWHPL conditioning
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN 14518
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2005
ICS 91.140.30
English version
Ventilation for buildings - Chilled beams - Testing and rating of
passive chilled beams
Ventilation des bâtiments - Poutres froides - Essais et Lüftung von Gebäuden - Kühlbalken - Prüfung und
évaluation des poutres froides passives Bewertung von passiven Kühlbalken
This European Standard was approved by CEN on 25 March 2005.
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 Central Secretariat or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 14518:2005: E
worldwide for CEN national Members.

Contents page
Foreword. 3
1 Scope. 4
2 Normative references. 4
3 Terms, definitions and symbols. 4
3.1 Terms and definitions . 4
3.2 Symbols and units. 6

4 Test method . 8
4.1 Principle . 8
4.2 Test room . 8
4.3 Instrumentation . 9
4.4 Test procedure. 10
5 Uncertainty. 12
6 Test report. 12

Foreword
This European Standard (EN 14518:2005) has been prepared by Technical Committee CEN /TC 156,
"Ventilation for buildings", the secretariat of which is held by BSI.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by December 2005, and conflicting national standards
shall be withdrawn at the latest by December 2005.The other standards dealing with chilled beams
and chilled ceilings are:
EN 14240 Ventilation for buildings — Chilled ceilings — Testing and rating
prEN 15116 Ventilation in buildings — Chilled beams — Testing and rating of active chilled beams
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia,
Spain, Sweden, Switzerland and United Kingdom.
1 Scope
This European Standard specifies test conditions and methods for the determination of the cooling
capacity of chilled beams or other similar systems with free convection, i.e. without forced air flow.
Also included is the method to determine local air velocity and temperature below the beam.
The purpose of the standard is to give comparable and repeatable product data.
The test method applies to all types of convector cooling systems using any medium as energy
transport medium.
NOTE The result is valid only for the specified test set up. For other conditions, (i.e. different positions of
heat loads, inactive ceiling elements around the test objects or forced flow into or around the test object), the
producer should give guidance based on full scale tests.
This standard refers to water as the cooling medium throughout, however, wherever water is written,
any other cooling medium can also be used in the test. Where air is the transport medium this air may
not be discharged into the test room.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
EN 12792:2003, Ventilation for buildings - Symbols, terminology and graphical symbols
EN 13182, Ventilation for buildings — Instrumentation requirements for air velocity measurements in
ventilated spaces
EN 14240:2004, Ventilation for buildings — Chilled ceilings — Testing and rating
EN ISO 7726, Ergonomics of the thermal environment - Instruments for measuring physical quantities
(ISO 7726:1998)
3 Terms, definitions and symbols
3.1 Terms and definitions
For the purposes of this European Standard, the terms and definitions given in EN 12792:2003 and the
following apply.
3.1.1
chilled beam
convector cooled with water and mounted under the ceiling of the test room with suspended ceiling
NOTE This standard deals with passive beams, i.e. convectors with free convection only.
3.1.2
test room
room in which the test object is mounted
3.1.3
convection flow
local airflow from a heating element in the test room, or the local airflow from a test object of type
chilled beam
NOTE These types of convection flow can be visualised with smoke tests.
3.1.4
room air temperature (θθθθ )
a
average of air temperatures measured with radiation shielded sensors in positions out of the
convection flow
3.1.5
globe temperature (θθ )
θθ
g
temperature measured with a temperature sensor placed in the centre of the globe. The globe is
placed in a position out of the convection flow
3.1.6
air on coil temperature (θθθθ )
ac
reference temperature equals average air temperature on the inlet side of a cooling convector,
measured with radiation shielded sensors in two positions along the convector, ¼ of the convector
length from each end of the convector. One sensor is placed 30 mm vertically above the left side and
the other 30 mm above the right side of the convector
3.1.7
local air temperature
temperature measured at 0,75 m below the beam discharge point in the convective airflow from the
beam
3.1.8
local mean air velocity
velocity measured at 0,75 m below the beam discharge point in the convective airflow from the beam
3.1.9
cooling water flow rate (q )
v
average of the measured water flow rates during the test period
3.1.10
cooling water inlet temperature (θθθθ )
w1
average of the measured water temperature into the test object during the test period
3.1.11
cooling water outlet temperature (θθθθ )
w2
average of the measured water temperature out of the test object during the test period
3.1.12
mean cooling water temperature (θθ )
θθ
w
mean value of the cooling water inlet and outlet temperatures, (θ = 0,5·[θ + θ ])
w w1 w2
3.1.13
temperature difference (∆θ∆θ∆θ∆θ )
difference between air on coil temperature and mean cooling water temperature, (∆θ = θ - θ )
ac w
3.1.14
specific heat capacity (c )
p
heat require to raise the temperature of unit mass of the cooling medium by I K
NOTE c for water = 4,187 kJ/(kg·K) at 15 °C.
p
3.1.15
cooling length (L) of a chilled beam
active length of the cooling section
3.1.16
total length (L ) of a chilled beam
t
total installed length of the cooling section including casing
3.1.17
cooling capacity (P)
total cooling capacity of the test object calculated from the measured cooling water mass flow rate
and the cooling water temperature rise
3.1.18
specific cooling capacity of a chilled beam (P )
L
cooling capacity divided by the (active) cooling length
3.1.19
nominal temperature difference
nominal temperature difference (8 K) between the air on coil temperature and the mean cooling water
temperature (∆θ = θ - θ = 8 K)
N ac w
3.1.20
nominal cooling water flow rate (q )
wN
flow rate that gives a cooling water temperature rise (θ - θ ) of 2 K ± 0,2 K at the nominal
w2 w1
temperature difference (∆θ = 8 K)
N
3.1.21
nominal cooling capacity (P ) or nominal specific cooling capacity (P )
N LN
cooling capacity calculated from the curve of best fit for the nominal cooling water flow rate at the
nominal temperature difference (∆θ = 8 K)
N
3.2 Symbols and units
For the purposes of this European Standard, the symbols in EN 12792:2003 apply together with those
given in Table 1.
Table 1 — Symbols and units
Symbol Quantity Unit
c Specific heat capacity KJ/(kg·K)
p
L Active length of a chilled beam m
L Total length of a chilled beam, including casing m
t
P Total cooling capacity P =c ·q ·(θ - θ ) W
p m w2 w1
P Specific cooling capacity of a chilled beam, relative to W/m
L
active length L
P W
Nominal cooling capacity at ∆θ = θ - θ = 8 K
N N ac w
P W/m
Nominal specific cooling capacity at ∆θ = 8 K
LN N
P Specific cooling capacity of a chilled beam, relative to W/m
Lt
total length L
t
q Cooling medium volume flow rate l/s
v
q Nominal cooling water volume flow rate l/s
vN
q kg/s
Cooling medium mass flow rate (q = ρ · q )
m m w v
v Local mean air velocity at 0,75 m below the beam m/s
L
discharge plane
kg/l
ρ Density of cooling medium at θ
w w
θ Room air temperature °C
a
θ Globe temperature °C
g
Reference temperature = air on coil temperature °C
θ
ac
Local air temperature at 0,75 m below the beam °C
θ
L
discharge plane
Temperature difference K
∆θ
Nominal temperature difference (8 K) K
∆θ
N
θ Cooling water inlet temperature °C
w1
θ Cooling water outlet temperature °C
w2
Mean cooling water temperature °C
θ
w
4 Test method
4.1 Principle
4.1.1 General
The cooling capacity of the test object shall be determined from measurements of the cooling water
flow rate and cooling water temperature rise under steady state condition. The cooling capacity shall
be presented as a function of the temperature difference between the reference air on coil
temperature and the mean cooling water temperature.
Local air temperature and local mean air velocity shall be measured in the convective discharge from
the beam at 0,75 m below the beam discharge plane.
The measurements shall be performed in an airtight room with controlled temperatures on the inside
surfaces. Two alternative methods are allowed:
4.1.2 The internal heat supply method
NOTE This method uses the same test room and heating supply to the room as specified in EN 14240 for
testing and rating of chilled ceilings.
The perimeter of the room shall be insulated and have negligible heat flow through it. The perimeters
shall be insulated in such a way that during the test the average heat flow through these surfaces is
less than 0,40 W/m .
To balance the cooling capacity of the test object, heating is supplied in the test room by means of a
number of electric heated person simulators, dummies, as described in 4.3.1. The dummies are
placed on the floor inside the test room. To get reproducible results it is essential that the dummies be
placed in determined positions as described in 4.4.1 of EN 14240:2004. For location of beam(s)
relative to the dummies, see 4.4.1 of this standard.
4.1.3 The external heat supply method
To balance the cooling capacity of the test object, heating is supplied to the test room evenly
distributed through the walls and the floor. The ceiling shall be insulated in such a way that durin
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