1、BSI Standards PublicationBS ISO 16494:2014Heat recovery ventilators andenergy recovery ventilators Method of test forperformanceBS ISO 16494:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16494:2014.The UK participation in its preparation was entrusted to
2、 TechnicalCommittee RHE/17, Testing of air conditioning units.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The
3、 British Standards Institution 2014. Published by BSI StandardsLimited 2014ISBN 978 0 580 77088 3ICS 23.120; 27.080Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on
4、30 November 2014.Amendments issued since publicationDate Text affectedBS ISO 16494:2014 ISO 2014Heat recovery ventilators and energy recovery ventilators Method of test for performanceVentilateurs-rcuprateurs de chaleur et ventilateurs-rcuprateurs dnergie Mthode dessai des performancesINTERNATIONAL
5、STANDARDISO16494First edition2014-11-01Reference numberISO 16494:2014(E)BS ISO 16494:2014ISO 16494:2014(E)ii ISO 2014 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2014All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any fo
6、rm or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISOs member body in the country of the requester.ISO copyright officeCase postale 56
7、CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 16494:2014ISO 16494:2014(E)Contents PageForeword v1 Scope . 12 Normative references 13 Terms and definitions . 14 Symbols and abbreviated terms . 55 Airflow test . 65.1 Ge
8、neral conditions . 65.2 Ducted heat recovery ventilators and energy recovery ventilators 65.3 Unducted heat recovery ventilators and energy recovery ventilators . 96 Tracer gas tests. 96.1 General conditions . 96.2 Temperature conditions 96.3 Preconditions . 96.4 Airflow conditions 96.5 Unit operati
9、ng voltage and frequency 96.6 Tracer gas measurement methods 97 Determination of efficiency .107.1 General conditions 107.2 Temperature and humidity conditions: inlets to ventilator 107.3 Preconditions 107.4 Airflow conditions . 107.5 Static pressure conditions: ducted heat and energy recovery venti
10、lators .117.6 Static pressure conditions: unducted heat and energy recovery ventilators 117.7 Unit operating voltage and frequency . 117.8 Thermal performance measurement . 118 Performance calculations 118.1 Performance calculations: ducted ventilators 118.2 Performance calculations: unducted ventil
11、ators 118.3 Unit Exhaust Air Transfer Ratio (UEATR) . 118.4 Net supply airflow . 128.5 Gross effectiveness .138.6 Coefficient of energy (COE) . 148.7 Effective work (EW) 159 Test results .16Annex A (normative) Airflow measurement method for both ducted and unducted ventilators .17Annex B (normative)
12、 Decay method for measurement of net supply airflow 19Annex C (normative) Unit exhaust air transfer ratio measurement methods 21Annex D (normative) Thermal performance measurement .25Annex E (informative) Example data collection and reporting sheets .28Annex F (normative) Required instrument uncerta
13、inty 36Annex G (informative) Construction of plenums for connection to inlets or outlets not designed for connection of ductwork 37Bibliography .38 ISO 2014 All rights reserved iiiBS ISO 16494:2014ISO 16494:2014(E)ForewordISO (the International Organization for Standardization) is a worldwide federa
14、tion of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committ
15、ee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and t
16、hose intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2
17、 (see www.iso.org/directives).Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any patent rights identified during the development of the d
18、ocument will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute an endorsement.For an explanation on the meaning of ISO specific terms a
19、nd expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committee responsible for this document is ISO/TC 86, Refrigeration and air-condi
20、tioning, Subcommittee SC 6, Testing and rating of air-conditioners and heat pumps.iv ISO 2014 All rights reservedBS ISO 16494:2014Heat recovery ventilators and energy recovery ventilators Method of test for performance1 ScopeThis International Standard prescribes a method of testing the ventilation
21、and energy related performance of heat recovery ventilators (HRVs)and energy recovery ventilators (ERVs) that do not contain any supplemental heating (except for defrost), cooling, humidification or dehumidification components.2 Normative referencesThe following documents, in whole or in part, are n
22、ormatively 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.ISO 3966:2008, Measurement of fluid flow in closed conduits
23、 Velocity area method using Pitot static tubesISO 5167-1:2003, Measurement of fluid flow by means of pressure differential devices inserted in circular cross-section conduits running full Part 1: General principles and requirementsISO 5801:2007, Industrial fans Performance testing using standardized
24、 airways3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1outdoor airflowOAvolume of outside air entering the ventilatorNote 1 to entry: Indicated in Figure 1 as 1.Note 2 to entry: Also referred to as entering supply air.3.2supply airflowSAoutside
25、 air after passing through the ventilatorNote 1 to entry: Indicated in Figure 1 as 2.Note 2 to entry: Also referred to as leaving supply air.3.3return (extract) airflowRAindoor air entering the ventilatorNote 1 to entry: Indicated in Figure 1 as 3.Note 2 to entry: Also referred to as entering exhaus
26、t air.INTERNATIONAL STANDARD ISO 16494:2014(E) ISO 2014 All rights reserved 1BS ISO 16494:2014ISO 16494:2014(E)3.4exhaust airflowEAindoor air after passing through the ventilatorNote 1 to entry: Indicated in Figure 1 as 4.Note 2 to entry: Also referred to as leaving exhaust air.Key1 outdoor airflow
27、(OA) (entering)2 supply airflow (SA) (leaving)3 return airflow (RA) (entering)4 exhaust airflow (EA) (leaving)5 ventilator6 indoor side7 outdoor sideFigure 1 Schematic numbering of airflows for heat and energy recovery ventilators3.5stationlocation in the test apparatus at which conditions such as t
28、emperature, humidity, pressure, or airflow are measuredNote 1 to entry: These locations are identified as “station 1”, “station 2”, “station 3” and “station 4” for each of the airflows indicated in Figure 1.3.6coefficient of energyCOEtotal exchanged energy between the airstreams plus the power value
29、 of moving air, divided by the power inputNote 1 to entry: The equation for determining the coefficient of energy is given in 8.6.3.7rating pointssets of supply and return airflows, static pressures at inlets and outlets, and speed control setting, achieved during the airflow performance measurement
30、, at which thermal performance tests (and exhaust air transfer tests, if applicable) are performed2 ISO 2014 All rights reservedBS ISO 16494:2014ISO 16494:2014(E)3.8effective workEWtotal exchanged energy between the airstreams plus the power value of moving air minus the power inputNote 1 to entry:
31、The equation for determining the effective work is given in 8.7.Note 2 to entry: Effective work is expressed in W.3.9power value of moving airrate of pressure energy and kinetic energy of the air delivered by the ventilatorNote 1 to entry: The equation that determines the power value of moving air i
32、s given in 8.6.1.Note 2 to entry: Power value of moving air is expressed in J/s for Pvma.3.10gross effectivenessmeasured effectiveness, not adjusted for leakage, motor heat gain, or heat transfer through the unit casingNote 1 to entry: The sensible, latent or total gross effectiveness of an HRV or E
33、RV, at equal airflows, is described in 8.5.3.11maximum rated airflowthe largest supply and return airflows, specified by the manufacturer, at which an airflow test is performedNote 1 to entry: For ventilators with speed control devices, different maximum rated airflows may be defined for each speed
34、control setting at which the test is performed.3.12minimum rated airflowthe smallest supply and return airflows, specified by the manufacturer, at which an airflow test is performedNote 1 to entry: For ventilators with speed control devices, different minimum rated airflows may be defined for each s
35、peed control setting at which the test is performed.3.13net supply airflowportion of the leaving supply airflow that originated as entering supply airflowNote 1 to entry: The net supply airflow is represented by the variable QSANet, measured in m3/s.Note 2 to entry: The equations for determining net
36、 supply airflow are given in 8.4.1 (ducted units) and 8.4.2 (unducted units).3.14net supply airflow ratioratio determined by dividing net supply airflow by supply airflowNote 1 to entry: Expressed as a percentage, and described in 8.4.1 and 8.4.2.3.15speed control devicedevice incorporated into the
37、ventilator which controls the speed of the fan3.16standard airdry air with a density of 1,2 kg/m3Note 1 to entry: These conditions approximate dry air at 20C and 101,325 kPa absolute. ISO 2014 All rights reserved 3BS ISO 16494:2014ISO 16494:2014(E)3.17static pressure differentialabsolute difference
38、between inlet static pressure and outlet static pressure for each of the two airstreamsEXAMPLE Static pressures measured at X2-X1, or X4-X3.3.18thermal performance measurementtest procedure which measures the temperature and humidity of the supply air when a ventilator is operating with the outside
39、air and return air at specific psychrometric conditions3.19unit exhaust air transfer ratioUEATRtracer gas concentration difference between the supply airflow and the outdoor airflow divided by the tracer gas concentration difference between the return airflow and the outdoor airflow, at a specified
40、airflowNote 1 to entry: The equation for UEATR is given in 8.3.Note 2 to entry: UEATR is expressed as a percentage.3.20ventilatorself contained unit that includes fans to move air through the heat/energy exchanger3.21energy recovery ventilatorERVventilator which is designed to transfer both heat and
41、 moisture between two isolated airstreams3.22fresh air mass flow rateqm2leaving supply mass airflow rate at station 23.23heat recovery ventilatorHRVventilator which is designed to transfer only heat between two isolated airstreams3.24unducted ventilatorheat recovery ventilator or energy recovery ven
42、tilator which is not intended for connection of ducts to any of the airflow inlets or outlets except for model specific exterior termination systems as defined in 3.273.25ducted ventilatorheat recovery ventilator or energy recovery ventilator which is intended for connection of ducts to one or more
43、of the airflow inlets or outlets and intended to address a range of static pressure differentials from the duct(s)3.26ductinsulated or uninsulated closed passage for air that is installed as part of the ventilation system in lengths determined by the needs of application, and is separate, prior to i
44、nstallation from exterior terminations such as weather hoods4 ISO 2014 All rights reservedBS ISO 16494:2014ISO 16494:2014(E)3.27model-specific exterior termination systemweather hoods, fittings and through-wall penetrations designed by the ventilator manufacturer specifically for installation with a
45、 specific model of ventilator, that comprise the complete passageway connecting the ventilators outside air inlet and/or exhaust air outlet to the ventilator3.28net supply mass flow rateqm2,netportion of the leaving supply mass airflow rate at station 2 that originated as entering supply mass flow r
46、ate at station 1, accounting for UEATRNote 1 to entry: Per the equation in 8.6.1and 8.6.2.4 Symbols and abbreviated termsSymbol Definition UnitsCiInitial tracer gas concentration in the test chamber (average of all measure-ment points)CoTracer gas concentration in outdoor air (OA)COATracer gas conce
47、ntration at outdoor air inlet (station 1)CpSpecific heat at supply airflow kJ/kg KCRATracer gas concentration at return air inlet (station 3)CSATracer gas concentration at supply air outlet (station 2)CtTracer gas concentration in the test chamber after t hours (average of all measurement points)h1E
48、nthalpy of the air at station 1 kJ/kg of dry airh2Enthalpy of the air at station 2 kJ/kg of dry airqm2Fresh air mass flow rate kg/sqm2,netNet supply mass flow rate kg/sNSAR Net supply airflow ratio %PauxInput power to any other electrical components in the ventilator WPemInput power to all electric
49、motors in the ventilator WPinInput power to ventilator WPvmaPower value of moving air J/sQ Gross airflow m3/sQ1Average of the three calculated overall airflow rates with the unit under test in operation as described in B.2.1.1 and B.2.1.2m3/sQ2Average of the three calculated natural airflow rates of the test chamber with the ventilator removed as described in B.2.2.1 and B.2.2.2m3/sQiAirflow rate calculated using the data from a test i as described in B.2.1.1, B.2.1.2, B.2.2.1 and B.2.2.2m3/sQSASupply airflow m3/sQSANetNet
