BS EN 327:2014 pdf free.Heat exchangers – Forced convection air cooled refrigerant condensers一Test procedures for establishing performance.
BS EN 327 This European Standard applies to non-ducted forced convection air cooled refrigerant condensers/gas coolers with dry air side surface within which the refrigerant changes phases or is cooled. Its purpose is to establish uniform methods of performance assessment. It does not deal with evaluation of conformity.This European Standard does not apply to air cooled condensers/gas coolers, designed primarily for installation within the machinery compartment of packaged products or in factory-assembled condensing/gas cooling units.
This European Standard does not apply to condensers with an integral subcooling part.This European Standard specifies methods to test and ascertain the following: 一product identification;一standard capacity;一nominal air flow rate;nominal fan power.This European Standard does not cover technical safety aspects.The following documents, in whole or in part, are normatively 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.EN 60034-1, Rotating electrical machines – Part 1: Rating and performance (IEC 60034-1)EN ISO/IEC 17025, General requirements for the competence of testing and calibration laboratories (ISO/IEC 17025) The influence of the refrigerant mass flow, the heat flux and the condensing temperature on the overall heat transfer of an air cooled condenser is low. As a result, in the range of temperature differences between 10 K and 20 K, the capacity is almost proportional to the temperature difference. The influence of superheat on the capacity is also low; it is below + 0,5 % per K superheat.For refrigerants which are cooled but not condensed in the gas cooler the test conditions shall be observed with the greatest possible accuracy, as conversion to standard conditions can be very extensive.The airflow through a condenser/gas cooler has great influence on its capacity. Because of the complicated relations a simple conversion to other air flows is not possible with sufficient accuracy. Therefore the electrical values which influence the fan speed (voltage and frequency) shall correspond with the standard supply conditions.BS EN 327 pdf download.