Guideline for Gas Turbine Inlet Air Filtration Systems
by Gas Machinery Research Council Southwest Research Institute®

Exhaustive paper going through the technologies of modern filtration for gas turbines. The document addresses the detrimental effect of bad filtration, the theory of filtration and the selection and design choice linked with location, OPEX and CAPEX.

TABLE OF CONTENTS

1. INTRODUCTION

2. BACKGROUND

2.1 Consequences of Poor Inlet Filtration

2.1.1 Foreign Object Damage

2.1.2 Erosion

2.1.3 Fouling

2.1.4 Cooling Passage Plugging

2.1.5 Particle Fusion

2.1.6 Corrosion

2.2 Use of Filtration

3. FILTER SELECTION

3.1 Filter Characteristics

3.1.1 Gas Turbine Contaminants

3.1.2 Filter Parameters

3.2 Types of Filters

3.2.1 Weather Protection and Trash Screens

3.2.2 Inertial Separators

3.2.3 Moisture Coalescers

3.2.4 Prefilters

3.2.5 High Efficiency Filters

3.2.6 Self-Cleaning Filters

3.2.7 Oil Bath Filters

3.2.8 Staged Filtration

3.2.9 Structural and Ducting Design

3.3 Application

3.3.1 Gas Turbine Inlet Specifications

3.3.2 Common Contaminants

3.3.3 Coastal, Marine, or Offshore Applications

3.3.4 Land Based Applications

3.3.5 Site Layout

3.2.6 Self-Cleaning Filters

3.2.7 Oil Bath Filters

3.2.8 Staged Filtration

3.2.9 Structural and Ducting Design

3.3 Application

3.3.1 Gas Turbine Inlet Specifications

3.3.2 Common Contaminants

3.3.3 Coastal, Marine, or Offshore Applications

3.3.4 Land Based Applications

3.3.5 Site Layout

3.3.6 Site Evaluation

3.4 Filtration System Life Cycle Cost Analysis

3.4.1 Basics of Life Cycle Cost Analysis

3.4.2 Gas Turbine Inlet Filtration System Considerations

3.4.3 Example LCC Analysis

4.1 Installation

4.2 Instrumentation

4.3 Filter Replacement, Cleaning, and Inspection

4.4 Maintenance Scheduling

4.5 Water Washing

5. FILTER TESTING

5.1 ASHRAE 52.2: 2007 – Method of Testing General Ventilation Air-Cleaning Devices for Removal Efficiency by Particle Size

5.2 EN 779: 2002 – Particulate Air Filters for General Ventilation – Determination of the Filtration Performance

5.3 EN 1822: 2009 (Parts 1 through 5) – High Efficiency Air Filters (EPA, HEPA, and ULPA) 86 5.3.1 Test Set-up

5.4 Other Testing Considerations

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