ISO 29461-2:2022 回転機械用吸気フィルターシステム — 試験方法 — Part 2: 霧およびミスト環境でのフィルターエレメントの耐久性試験 | ページ 2

3.1 空気の流れと圧力損失

3.2 フィルター

3.4 試験材料

Foreword

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This document was prepared by Technical Committee ISO/TC 142, Cleaning equipment for air and other gases, in collaboration with the European Committee for Standardization (CEN) Technical Committee CEN/TC 195, Cleaning equipment for air and other gases, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement).

A list of all parts in the ISO 29461 series can be found on the ISO website.

Introduction

The ISO 29461 series provides a way to compare these products in a similar method and define what criteria are important for air intake filter systems for rotary machinery performance protection. The aim is to compare the performance of different filters and filter types with respect to the operating conditions in which they will be finally used.

Air intake filter system of rotary machinery is an important part of the whole gas turbine and air compressor systems. It usually consists of filter elements with a suitable way to be installed. The operating environment of rotary machinery including gas turbine and compressor and their air intake filtration units are complicated and challenging. Air filters intercept water mist and droplets when air passes through the air filter unit in case the equipment is working in rainy, foggy, hazy or other high-humidity environments or a local production environment which contains a large amount of water vapour, e.g. the cooling tower. If excessive water holds up, the performance of filters can be affected; pressure drop rises rapidly, causing a shut down in severe cases.

Reliability and non-break down operation of rotary machinery are regarded as a top priority for the end users, with the rapidly rising pressure drop under high-humidity conditions usually being their main concern. There are rotary machinery operating accidents caused by high-humidity conditions all over the world, whether it be inland or along the river or coastal.

To meet the requirements of production and operation, the water endurance performance of air filter elements needs to be considered besides assessing the performance of initial pressure drop, filtration efficiency and dust-holding capacity, especially when the air filter elements are used in high-humidity environments or intake air contains a large quantity of liquid droplets.

This document provides a water endurance test method for filter elements and can be used for evaluating performance variation trends of filter elements when encountering water and fog. This document can be used for:

• product development for filter manufacturers;
• supplier selection for end users;
• development of water endurance media by media manufacturers.

This document provides a repeatable, easy-to-conduct and economical test method, which is applicable to pulse-jet cleaning filter elements and filter elements for general ventilation.

1 Scope

This document specifies general test requirements, the test rig and equipment, the test materials and the test procedure and report for determining water endurance performance of air filter elements used in air intake filter systems for rotary machinery such as stationary gas turbines, compressors and other stationary internal combustion engines.

The test evaluates water endurance performance of air filter elements under laboratory conditions. The performance results obtained in accordance with this document cannot be quantitatively applied (by themselves) to predict performance in service with regard to water endurance and lifetime.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document the following terms and definitions apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

Bibliography