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BS EN 14705:2005

Current
Current

The latest, up-to-date edition.

Heat exchangers. Method of measurement and evaluation of thermal performances of wet cooling towers
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

28-07-2005

Foreword
1 Scope
2 Normative references
3 Terms, definitions and symbols
   3.1 Terms and definitions
   3.2 Symbols
4 Performance tests - General
5 Guarantee
   5.1 General
   5.2 Guarantee documents
   5.3 Validity conditions for measurements
6 Test procedure
   6.1 Test parameters
   6.2 Quantities to be measured
   6.3 Quantities to be determined
   6.4 Measurements and calculation of the mean quantities
   6.5 Arrangement of measuring devices
   6.6 Measuring apparatus
7 Conducting the performance tests
   7.1 Definition of a test
   7.2 Duration of the test
8 Calculation methods
   8.1 General
   8.2 Methods
9 Evaluation of thermal performances
   9.1 General
   9.2 Basic thermal performance test evaluation
   9.3 Extended thermal performance test evaluation
10 Test tolerance
   10.1 General
   10.2 Error created by non-measurable systematic deviations
        of operating parameters
Annex A (informative) Performance curves
Annex B (normative) Requirements concerning the measuring
                      apparatus used for the tests
Annex C (normative) Calculation of the evaporated water
                      flow rate
Annex D (normative) Reminders on error calculations
Annex E (normative) Cold water temperature correction for
                      heat added by pump
Bibliography

Defines requirements, test methods and acceptance tests for thermal performances pumping head verification of wet cooling towers and plume abatement for wet/dry cooling towers.

This European Standard specifies requirements, test methods and acceptance tests for thermal performances pumping head verification of wet cooling towers and plume abatement for wet/dry cooling towers. This European Standard is applicable to natural draught wet cooling towers (see in 3.1.2.2) fan assisted natural draught cooling tower (see 3.1.2.3), wet/dry cooling towers (see 3.1.2.4) and \'Mechanical draught cooling towers\', except series ones. It specifies the test methods, the apparatus required, the limitation of errors and the method for results examination. The acceptance testing covers the verification of the thermal performance data and pumping head of the cooling tower as specified in the contract between the supplier and the purchaser. If these tests are required then this should be recognized at the time of the contract, as additional fittings, and preparations for the test may be required. Deviations from the rules laid down below as well as additions need special agreement between purchaser and supplier and should be documented. This standard does not apply to mechanical draught series wet cooling towers which are dealt with in prEN 13741. NOTE Terms like \'design\', \'values\', \'guarantee\' and \'acceptance\' used in this standard should be understood in a technical but not in a legal or commercial sense.

Committee
RHE/30
DevelopmentNote
Supersedes 03/307958 DC. (08/2005)
DocumentType
Standard
Pages
66
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
I.S. EN 14705:2005 Identical
NEN EN 14705 : 2005 Identical
NF EN 14705 : 2005 Identical
UNE-EN 14705:2006 Identical
NBN EN 14705 : 2005 Identical
EN 14705:2005 Identical
UNI EN 14705 : 2005 Identical
SN EN 14705 : 2005 Identical
NS EN 14705 : 1ED 2005 Identical
DIN EN 14705 E : 2005 Identical
DIN EN 14705:2005-10 Identical

EN 13741:2003 Thermal performance acceptance testing of mechanical draught series wet cooling towers
ISO 2975-3:1976 Measurement of water flow in closed conduits — Tracer methods — Part 3: Constant rate injection method using radioactive tracers
EN 872:2005 Water quality - Determination of suspended solids - Method by filtration through glass fibre filters
EN 306:1997 Heat exchangers - Methods of measuring the parameters necessary for establishing the performance
EN ISO 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 requirements (ISO 5167-1:2003)
EN 60751:2008 INDUSTRIAL PLATINUM RESISTANCE THERMOMETERS AND PLATINUM TEMPERATURE SENSORS
ISO/TR 3313:1998 Measurement of fluid flow in closed conduits Guidelines on the effects of flow pulsations on flow-measurement instruments
ISO 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 requirements
IEC 60751:2008 Industrial platinum resistance thermometers and platinum temperature sensors

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