SIST EN 1048:2014
(Main)Heat exchangers - Air cooled liquid coolers ('dry coolers') - Test procedures for establishing performance
General Information
- Abstract
This European Standard applies to remote forced convection air cooled liquid coolers, within which no change in the liquid phase occurs.
This European Standard does not apply to liquid coolers, designed primarily for installation within the machinery compartment of packaged products.
Its purpose is to establish uniform methods to test and ascertain the following:
- Product identification;
- Capacity;
- Air flow rate;
- Liquid side pressure drop;
- Energy requirements.
This European Standard does not cover technical safety aspects.
- Status
- Published
- Public Enquiry End Date
- 30-Dec-2012
- Publication Date
- 28-Sep-2014
- Technical Committee
- OGS - Heating for buildings
- Current Stage
- 6060 - National Implementation/Publication (Adopted Project)
- Start Date
- 10-Sep-2014
- Due Date
- 15-Nov-2014
- Completion Date
- 29-Sep-2014
Overview
EN 1048:2014 - published by CEN - is the European standard that defines test procedures for establishing the performance of air‑cooled liquid coolers (dry coolers). It applies to remote, forced‑convection dry coolers in which the liquid remains single‑phase and is intended to provide uniform, repeatable methods for measuring product identification, cooling capacity, air flow rate, liquid‑side pressure drop, and energy (fan) requirements. The standard explicitly excludes liquid coolers designed primarily for installation inside the machinery compartment of packaged products and does not address technical safety requirements.
Key topics and requirements
- Scope and definitions: Clear definitions for terms such as forced convection air cooled liquid cooler (dry cooler), capacity, inlet/outlet temperatures and pressure differences.
- Standard test conditions: Reference atmospheric pressure is specified (1013.25 hPa); nominal air flow is referenced to +20 °C (see standard for full set of standard capacity operating conditions).
- Measurement methods:
- Capacity measured by liquid mass flow × enthalpy difference (direct liquid‑side method).
- Air volume flow measured by methods capable of capturing overall turbulent flow (per CEN guidance).
- Measurement criteria and instrumentation:
- Temperature sensor placement, insulation and averaging rules to avoid stratification errors.
- Pressure tap locations in straight pipe runs.
- Requirements for calibrated flow meters and electrical measurements.
- Uncertainty limits (examples from the standard):
- Temperatures: ±0.2 K (air/liquid); liquid ΔT ±0.1 K.
- Liquid flow: ±1 %.
- Electrical power/current/voltage: ±1 % / ±0.5 % / ±0.5 %.
- Liquid differential pressure: ±1 % of reading or ±0.02 bar (whichever is higher).
- Test reporting and conversion rules: Procedures for converting measured results to standard conditions and for preparing a test report.
Applications and users
- Manufacturers of dry coolers and heat exchangers can use EN 1048:2014 to specify and verify product performance and produce comparable data sheets.
- Test laboratories use the standard to perform accredited performance testing (in line with EN ISO/IEC 17025 competence requirements).
- Consultants, specifiers and end users (HVAC, industrial cooling, process industries) rely on EN 1048 results to size equipment, compare vendors, and evaluate energy and pressure‑drop impacts.
- Useful for procurement, performance claims validation and regulatory / compliance benchmarking within Europe.
Related standards
- EN ISO/IEC 17025 (laboratory competence) is normatively referenced.
- Other CEN standards on fan testing and general heat‑exchanger testing methods are relevant when applying EN 1048:2014 (see the standard’s normative references for details).
Keywords: EN 1048:2014, dry coolers, air‑cooled liquid coolers, heat exchangers, test procedures, capacity testing, air flow rate, liquid pressure drop, fan power, CEN standard.
Relations
- Effective Date
- 01-Nov-2014
- Effective Date
- 28-Jan-2026
- Effective Date
- 28-Jan-2026
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Frequently Asked Questions
SIST EN 1048:2014 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Heat exchangers - Air cooled liquid coolers ('dry coolers') - Test procedures for establishing performance". This standard covers: This European Standard applies to remote forced convection air cooled liquid coolers, within which no change in the liquid phase occurs. This European Standard does not apply to liquid coolers, designed primarily for installation within the machinery compartment of packaged products. Its purpose is to establish uniform methods to test and ascertain the following: - Product identification; - Capacity; - Air flow rate; - Liquid side pressure drop; - Energy requirements. This European Standard does not cover technical safety aspects.
This European Standard applies to remote forced convection air cooled liquid coolers, within which no change in the liquid phase occurs. This European Standard does not apply to liquid coolers, designed primarily for installation within the machinery compartment of packaged products. Its purpose is to establish uniform methods to test and ascertain the following: - Product identification; - Capacity; - Air flow rate; - Liquid side pressure drop; - Energy requirements. This European Standard does not cover technical safety aspects.
SIST EN 1048:2014 is classified under the following ICS (International Classification for Standards) categories: 27.060.30 - Boilers and heat exchangers; 27.200 - Refrigerating technology. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN 1048:2014 has the following relationships with other standards: It is inter standard links to SIST EN 1048:1999, SIST EN ISO/IEC 17025:2017, SIST EN 13487:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
SIST EN 1048:2014 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Wärmeaustauscher - Luftgekühlte Flüssigkeitskühler ('Trockenkühltürme') - Prüfverfahren zur LeistungsfeststellungÉchangeurs thermiques - Refroidisseurs de liquide à convection forcée ('aéroréfrigérant sec') - Procédures d’essai pour la détermination de la performanceHeat exchangers - Air cooled liquid coolers ('dry coolers') - Test procedures for establishing performance27.200Hladilna tehnologijaRefrigerating technology27.060.30Grelniki vode in prenosniki toploteBoilers and heat exchangersICS:Ta slovenski standard je istoveten z:EN 1048:2014SIST EN 1048:2014en,fr,de01-november-2014SIST EN 1048:2014SLOVENSKI
STANDARDSIST EN 1048:19991DGRPHãþD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 1048
August 2014 ICS 27.060.30; 27.200 Supersedes EN 1048:1998English Version
Heat exchangers - Air cooled liquid coolers ('dry coolers') - Test procedures for establishing the performance
Echangeurs thermiques - Refroidisseurs de liquide à convection forcée ('aéroréfrigérant sec') - Procédures d'essai pour la détermination de la performance
Wärmeübertrager - Luftgekühlte Flüssigkeitskühler ('Trockenkühltürme') - Prüfverfahren zur Leistungsfeststellung This European Standard was approved by CEN on 22 May 2014.
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.
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 CEN-CENELEC Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1048:2014 ESIST EN 1048:2014
tL3 kg/m3 tA1 Air inlet temperature °C tL1 Liquid inlet temperature °C tL2 Liquid outlet temperature °C tL3 Liquid temperature at flow meter °C ût1 Inlet temperature difference K ûtL Liquid temperature difference K 2 Test duration s 4.2 Superscripts )/
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