DIN EN 305 1997-07 PDF

Full title and description

DIN EN 305:1997-07 — Heat exchangers — Definitions of performance of heat exchangers and the general test procedure for establishing performance of all heat exchangers. This is the German national adoption (DIN EN) of the European Standard EN 305:1997; it defines terms, performance parameters and a harmonized general test procedure intended to be used as a reference by more specific application standards for heat exchangers.

Abstract

EN 305:1997 provides standardized terminology, symbols, basic performance definitions and general calculation methods for reporting and determining the thermal performance of heat exchangers. The standard also describes general test conditions and procedural steps applicable across multiple heat exchanger types (notably those classified by surface-arrangement types referenced in prEN 247:1996). It is intended as a general reference document to be invoked by more specific branch/application standards.

General information

• Status: Current (national adoption of EN 305:1997).
• Publication date: 1997-07 (DIN adoption: July 1997).
• Publisher: Comite Europeen de Normalisation (CEN) — published as EN 305:1997 and adopted as DIN EN by Deutsches Institut für Normung (DIN)/DIN Media distribution.
• ICS / categories: 01.040.27 (Energy and heat transfer engineering — vocabularies), 27.060.30 (Boilers and heat exchangers).
• Edition / version: EN 305:1997 (DIN EN 305:1997-07).
• Number of pages: 13 pages (DIN Media listing for the German national publication); some national publications/print versions may show slightly different page counts depending on formatting/language.

Scope

The standard specifies general terms, symbols and calculation methods used to determine the performance of heat exchangers and gives a harmonized general test procedure for establishing performance results. It applies principally to heat exchangers classified according to the heat-transfer surface arrangements referenced in prEN 247:1996 (surface types used in branch standards) and is intended to be referenced by more specific application standards; where an application standard exists, that application standard takes precedence for detailed test conditions and acceptance criteria.

Key topics and requirements

• Standardized terminology and symbols for heat-exchanger performance and reporting (Roman/Greek letters and subscripts).
• Definitions of performance parameters (effectiveness, capacity rates, overall heat transfer, characteristic quantities and ratios).
• General calculation methods and brief theoretical background (energy balance, heat transfer coefficients, heat transfer surface definitions).
• General test procedure and recommended test conditions for measuring performance (measurement objectives, key parameters to record, procedural sequence applicable across exchanger designs).
• Informative annexes (energy balance and information on heat transfer coefficients) to support interpretation and calculations.
• Designed to be a normative reference for branch application standards rather than specifying detailed construction or acceptance criteria for all product types.

Typical use and users

Used by heat-exchanger manufacturers, test and certification laboratories, OEM design engineers, HVAC and process engineers, regulatory bodies and standards committees as the general reference for terminology, calculation conventions and the baseline test procedure when preparing or performing performance testing of heat exchangers. It is particularly relevant where multiple national or sector-specific application standards reference a single, harmonized set of definitions and general test rules.

Related standards

Replaces earlier ENV versions (e.g., ENV 305 series) and is intended to be used together with or referenced by branch application standards such as prEN 247:1996 (heat-transfer surface type definitions) and other EN/ENV documents on heat exchanger design and testing (examples historically published in the ENV/EN family: ENV 247, ENV 306, ENV 307, ENV 308, ENV 327). National adoptions exist under prefixes (BS EN, SFS-EN, UNE-EN, NS EN, PN EN, etc.).

Keywords

heat exchanger, performance definitions, test procedure, effectiveness, overall heat transfer coefficient, energy balance, test conditions, EN 305, DIN EN, prEN 247.

FAQ

Q: What is this standard?

A: EN 305:1997 (published as DIN EN 305:1997-07 in Germany) is a European standard giving harmonized definitions, symbols, calculation methods and a general test procedure for determining heat-exchanger performance; it serves as a general reference to be invoked by more specific application standards.

Q: What does it cover?

A: It covers terminology, performance parameters (such as effectiveness and heat duty), general calculation principles (energy balance, heat transfer coefficients), and a generalized test procedure including recommended test conditions and measurement objectives. Informative annexes provide supporting theory (energy balance and heat transfer coefficients).

Q: Who typically uses it?

A: Manufacturers, test laboratories, design and process engineers, standards writers and conformity assessment bodies use EN 305 as the baseline reference for consistent reporting and general test methodology for heat-exchanger performance. Application-specific ENs or national standards then provide detailed test/acceptance criteria for particular product types.

Q: Is it current or superseded?

A: The DIN Media and several national catalogues list DIN EN 305:1997 as the adopted/current version of EN 305:1997. Users should verify national status and any amendments or replacements in their country’s standards catalogue before relying on it for regulatory compliance or certification.

Q: Is it part of a series?

A: Yes — EN 305 sits within a family of ENV/EN documents addressing heat-exchanger terminology, classification and test methods (historical ENV documents and related ENs such as those referenced by prEN 247); it is intended to be used together with branch application standards that specify detailed test and acceptance rules for particular exchanger types.

Q: What are the key keywords?

A: Heat exchanger, performance, test procedure, effectiveness, heat transfer coefficient, energy balance, EN 305, DIN EN.