oSIST prEN 15116:2005
(Main)Ventilation in buildings - Chilled beams - Testing and rating of active chilled beams
Ventilation in buildings - Chilled beams - Testing and rating of active chilled beams
This European Standard specifies methods for measuring the cooling capacity of chilled beams with forced air flow. The evaluation of aerodynamic air performance should be based on the requirements of WI156080 and the requirements set out in this standard.
The purpose of the Standard is to give comparable and repeatable product data.
The test method applies to all types of convector cooling systems with forced air supply using any medium as energy transport medium. This standard only applies to situations where induced air only passes through the heat exchanger (primary air does not pass through the heat exchanger).
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 ), the producer should give guidance based on full scale tests.
This standard refers to water as the main cooling medium , with the possibility of additional cooling from the primary air. Wherever water is written, any other cooling medium can also be used in the test.
Lüftung von Gebäuden - Kühldbalken - Prüfung und Berechnung von aktiven Kühlbalken
Ventilation dans les bâtiments - Poutres refroidies - Essais et évaluation des poutres refroidies actives
La présente norme européenne spécifie les méthodes de mesurage de la puissance de refroidissement des poutres refroidies par écoulement d'air forcé. Il convient que l'évaluation des performances aérauliques de l'air repose sur les exigences du WI 156080 et sur les exigences indiquées dans la présente norme.
La norme a pour but de fournir des données comparables et répétables concernant le produit.
La méthode d'essai s'applique a tous les types de systemes de refroidissement par convecteur avec soufflage d'air forcé, quel que soit le fluide utilisé pour véhiculer l'énergie. La présente norme s'applique uniquement aux situations dans lesquelles seul l'air induit traverse l'échangeur de chaleur (l'air primaire ne traverse pas l'échangeur de chaleur).
NOTE Le résultat ne vaut que pour la configuration d'essai spécifiée. Pour d'autres conditions (c'est-a-dire positions différentes des sources de chaleur, éléments de plafond inactifs autour des corps d'épreuve), il convient que le fabricant donne des indications basées sur des essais en vraie grandeur.
La présente norme mentionne l'eau comme principal agent de refroidissement avec la possibilité d'un refroidissement complémentaire a partir de l'air primaire. Lorsque l'eau est spécifiée, tout autre agent de refroidissement peut également etre utilisé pour l'essai.
Prezračevanje stavb - Hladilne grede - Preskušanje in razvrstitev aktivnih hladilnih gred
General Information
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Standards Content (Sample)
SLOVENSKI oSIST prEN 15116:2005
PREDSTANDARD
marec 2005
Ventilation in buildings - Chilled beams - Testing and rating of active chilled beams
ICS 91.140.30 Referenčna številka
oSIST prEN 15116:2005(en)
© Standard je založil in izdal Slovenski inštitut za standardizacijo. Razmnoževanje ali kopiranje celote ali delov tega dokumenta ni dovoljeno
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EUROPEAN STANDARD
DRAFT
prEN 15116
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2004
ICS
English version
Ventilation in buildings - Chilled beams - Testing and rating of
active chilled beams
Ventilation dans les bâtiments - Poutres refroidies - Essais
et évaluation des poutres refroidies actives
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee CEN/TC 156.
If this draft becomes a European Standard, 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.
This draft European Standard was established by CEN 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 Management Centre 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.
Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2004 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15116:2004: E
worldwide for CEN national Members.
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prEN 15116:2004 (E)
Contents Page
Foreword. 3
1 Scope. 4
2 Normative references . 4
3 Definitions and symbols. 4
4 Test method. 8
5 Uncertainty . 12
6 Test report . 13
2
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prEN 15116:2004 (E)
Foreword
This document (prEN 15116:2004) has been prepared by Technical Committee CEN/TC 156
“Ventilation for buildings”, the secretariat of which is held by BSI.
This document is currently submitted to the CEN Enquiry.
3
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prEN 15116:2004 (E)
1 Scope
This European Standard specifies methods for measuring the cooling capacity of chilled beams with
forced air flow. The evaluation of aerodynamic air performance should be based on the requirements
of WI156080 and the requirements set out in this standard.
The purpose of the Standard is to give comparable and repeatable product data.
The test method applies to all types of convector cooling systems with forced air supply using any
medium as energy transport medium. This standard only applies to situations where induced air only
passes through the heat exchanger (primary air does not pass through the heat exchanger).
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 ), the producer should give guidance based on full
scale tests.
This standard refers to water as the main cooling medium , with the possibility of additional cooling
from the primary air. Wherever water is written, any other cooling medium can also be used in the test.
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,Ventilation for buildings — Symbols, and terminology
EN ISO 7726, Ergonomics of the thermal environment — Instruments for measuring physical quantities
EN 13182, Ventilation for buildings — Instrumentation requirements for air velocity measurements in
ventilated spaces
prEN 14240, Ventilation for buildings — Chilled ceilings — Testing and rating
prEN 14518, Ventilation for buildings — Chilled beams — Testing and rating of passive chilled beams
WI156080, Air terminal devices- aerodynamic testing and rating for mixed flow applications for non-
isothermal testing — Part 1: Cold jets
3 Definitions and symbols
3.1 Definitions
For the purposes of this standard, the definitions in EN 12792 apply together with the following:
3.1.1
active chilled beam
convector with integrated air supply where the induced air or primary air plus induced air pass
through the cooling coil(s). The cooling medium in the coil is water
3.1.2
test room
room in which the test object is mounted
4
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prEN 15116:2004 (E)
3.1.3
primary air flow rate (q )
p
airflow supplied to the test object through a duct from outside of the test room
3.1.4
induced air flow rate (q )
i
secondary airflow from the test room induced into the test object by the primary air
3.1.5
exhaust air flow rate (q )
e
airflow discharged from the test room. The exhaust air flow rate is the same as the primary air flow
rate
3.1.6
cooling water flow rate (q )
w
the average of the measured water flow rates during the test period
3.1.7
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 nominal temperature
w2 w1
difference (∆θ = 8 K) and at nominal air flow rate
N
3.1.8
room air temperature (θθ )
θθ
a
average of air temperatures measured with radiation shielded sensors in 1,1 m height in positions out
of the main air current from the test object
3.1.9
globe temperature (θθθθ )
g
temperature measured with a temperature sensor placed in the centre of the globe. The globe is
placed in 1,1 m height in a position out of the main air current from the test object
3.1.10
reference air temperature (θθθθ )
r
reference air temperature equals average air temperature of the induced air on the inlet side of the
cooling coil(s), measured with radiation shielded sensors in two positions along the induced air
opening
3.1.11
cooling water inlet temperature (θθθθ )
w1
average of the measured water temperature into the test object during the test period
3.1.12
cooling water outlet temperature (θθθθ )
w2
average of the measured water temperature out of the test object during the test period
3.1.13
mean cooling water temperature (θθθθ )
w
mean value of the cooling water inlet and outlet temperatures, [θ =0,5·(θ + θ )]
w w1 w2
3.1.14
primary air temperature (θθθθ )
p
average of the primary air temperature during the test period
3.1.15
temperature difference (∆∆∆∆θθθθ)
difference between reference air temperature and mean cooling water temperature, ∆θ=θ - θ
r w
5
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prEN 15116:2004 (E)
3.1.16
nominal temperature difference (∆θ∆θ )
∆θ∆θ
N
nominal temperature difference (8 K) between the reference air temperature and the mean cooling
water temperature (∆θ =θ - θ =8 K)
N r w
3.1.17
primary air temperature difference (∆θ∆θ∆θ∆θ )
p
temperature difference between the reference air temperature and the primary air temperature
3.1.18
specific heat capacity (c )
p
heat required to raise the temperature of a unit mass of the cooling medium by 1K
-1 -1 -1 -1
NOTE cp for water = 4,187 kJ·kg ·K and cp for air = 1,005 kJ·kg ·K , at 15 °C.
3.1.19
cooling length (L)
active length of the cooling section
3.1.20
total length (L )
t
total installed length of the cooling section including casing
3.1.21
water side cooling capacity (P )
w
cooling capacity of the test object calculated from the measured cooling water flow rate and the
cooling water temperature rise P =c q (θ - θ )
w p m w2 w1
3.1.22
air side cooling capacity (P )
a
cooling capacity calculated from the primary air flow rate and primary air temperature difference.
P = c q ρ (θ - θ )
a p p p r p
3.1.23
specific cooling capacity per unit length (P )
L
water side cooling capacity divided by the (active) cooling section length
3.1.24
specific cooling capacity (P )
K
cooling capacity divided by the difference between reference air temperature and mean cooling water
m
temperature, ∆θ=θ - θ raised to the exponent m i.e. P = P/∆θ
r w K
3.1.25
nominal cooling capacity (P ) or nominal specific cooling capacity (P )
N LN
water side cooling capacity calculated from the curve of best fit for the nominal cooling water flow rate
at nominal temperature difference (∆θ = 8 K) and at nominal air flow rate
N
3.2 Symbols and units
For the purposes of this standard the symbols in EN 12792 apply together with those given in Table 1.
6
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prEN 15116:2004 (E)
Table 1 — Symbols and units
Symbol Quantity Unit
n
A
Constant in P = Aq p
K
m
k
Constant in P = k1 ∆θ
1
n
k
2
Constant in P = k2 qp
n
n
Exponent used in P = Aq p
K
m
m Exponent used in P = P/∆θ
K
L Cooling length (active length) M
L Total length of a chilled beam, including casing M
t
-1 -1
c Specific heat capacity kJ·kg ·K
p
h Height from floor to underside of active chilled beam M
P Total cooling capacity W
-1
P Specific cooling capacity per unit active length W m
L
P W
Nominal cooling capacity (at ∆θ = 8 K)
N
N
-1
P Nominal specific cooling capacity per unit active length W·m
LN
-m
m
( )
P W K
Specific cooling capacity (P = P/∆θ )
K
K
P Air cooling capacity W
a
-1
q Cooling medium flow rate l(litre)·s
w
-1
q Nominal cooling water flow rate l(litre)·s
wN
-1
q kg·s
m Cooling medium mass flow rate (q = ρ q )
m w w
-1
q Nominal primary air flow rate l(litre)··s
N
p
-1
q Primary air flow rate l(litre)··s
p
-1
q Induced air flow rate l(litre)··s
i
-1
q Exhaust air flow rate l(litre)··s
e
θ Room air temperature °C
a
Globe temperature °C
θ
g
θ Reference air temperature °C
r
Surface wall temperature °C
θ
sw
Primary air temperature °C
θ
p
θ Cooling water inlet temperature °C
w1
Cooling water outlet temperature °C
θ
w2
θ Mean cooling water temperature °C
w
-3
kg·m
ρ Density of primary air at θ
p p
-1
kg·l (litre)
ρ Density of cooling medium at θ
w w
Temperature difference K
∆θ
reference air temperature-water mean
Nominal temperature difference (=8K) K
∆θ
N
Temperature difference reference air temperature- K
∆θp
primary air temperature
7
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prEN 15116:2004 (E)
4 Test method
4.1 Principle
4.1.1 General
The water side 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 water
side cooling capacity shall be presented as a function of the primary air flow rate and the temperature
difference between the reference air temperature and the mean cooling water temperature.
The measurements shall be performed in an airtight room, to the requirements of 4.2, with controlled
temperatures on the inside surfaces. Two alternative methods are allowed:
4.1.2 The internal heat supply method
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
-2
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 of prEN 14240. The
dummies are placed on the floor inside the test room. To get reproducible results the dummies must
be placed in determined positions as described in 4.4.1 of prEN 14240. For location of beam(s)
relative to the dummies, see 4.4.1 of this standard.
NOTE This method use the same test room and heating supply to the room as specified in EN 14240 for
testing and rating of chilled ceilings.
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 during the
-2
test the heat flow through the ceiling is less than 0,40 W·m . The temperature of the inner walls and
floor of the test room must be controlled and maintained uniform at any level necessary to keep the
desired room temperature. The maximum temperature difference between any point of the inner walls
and floor during the test shall be less than 1,0 K.
4.2 Test room
The floor area of the test room shall be between 10,0 m2 and 21,0 m2.
The ratio of width to length of the test room shall be not less than 0,5; and the inside height shall be
between 2,7 m and 3,0 m.
The recommended inside dimensions are a length of 4 m, a width of 4 m and a height of 3 m.
NOTE The test room specification enables the use of test rooms in accordance with EN 442 for the testing
of chilled surfaces. The dimensions of the test room are given as a recommendation. It is permitted for the test
room dimensions to deviate from the recommended dimensions.
The test room shall be sufficiently tight to minimise flow from the ambient air outside which shall not
-1 -2
exceed 0.8 ls m of the perimeter surface at a pressure difference of 50 Pa (note includes floor walls
and ceiling).
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prEN 15116:2004 (E)
The outside of the room or outer room as appropriate should be insulated. The heat loss to the
outside should be determined by preliminary calibration (without test object cooling) to demonstrate
compliance with either 4.1.2 or 4.1.3 as appropriate.
It is recommended that fixed temperature sensors should be installed at least in the centre of each
inside wall and floor.
The radiation emission rate of the inner surfaces of the room shall be at least 0,9.
The inner wall and floor temperatures can be controlled by different methods for instance.
a) Water panels covering all outside surfaces with circulating temperature controlled water.
b) Forced air flow circulation, temperature controlled with electric heaters or heated water panels, in
an exterior room.
NOTE It is assumed that the insulation is placed inside, however if placed outside, the position of the
temperature sensor should be in the outer surface of the insulating layer and covered locally with required
insulation to ensure accurate measurement of the surface temperature.
The primary air is ducted to the test object through an insulated d
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