FABRICATION AND FIELD EVALUATION OF A HIGH CAPACITY, HIGH-EFFICIENCY CHARGE-AIR FILTER SYSTEM FOR ARMY AIRCRAFT. (PHASE 1. DESIGN, FABRICATION AND INITIAL EVALUATION)

1961 ◽  
Author(s):  
B. S. MCCARROLL ◽  
J. W. JACKEL
Keyword(s):  
High Efficiency ◽  
Phase 1 ◽  
High Capacity ◽  
Field Evaluation ◽  
Initial Evaluation ◽  
Air Filter ◽  
Filter System

Corrugated Flute Filter Media Packaging Reduces Combustion Turbine Intake Air Filter System Size by 40%

2004 ◽  
Author(s):  
Thomas C. Gahr
Keyword(s):  
Gas Turbine ◽  
High Efficiency ◽  
Three Dimensional ◽  
Initial Pressure ◽  
System Size ◽  
Size Reduction ◽  
Filter Media ◽  
Air Filter ◽  
Filter System ◽  
Self Cleaning

Gas turbine output and mass flow have increased significantly over the years. The current generation of self cleaning air filter systems are large and complex, occupying a great deal of space, and requiring significant amounts of field assembly. A new filter technology developed for gas turbine intake air systems allows for the same high efficiency self cleaning performance to be achieved with a system that has a 40% smaller three dimensional footprint. This new corrugated flute filter media packaging technology not only reduces the size of the intake filter system, but can also reduce the complexity of the installation, shorten field installation time, and reduce the total cost of shipping by up to 50%. The key to this size reduction is a new way to package the filter media that allows for twice the airflow per filter at the same initial pressure loss and filtration efficiency as the current industry standard self cleaning filter systems. This paper will discuss the benefits of corrugated flute filter media packaging, and highlight the size reduction possible in the self cleaning air intake system. The resulting advantages are documented through laboratory and field experience.

scholarly journals The Effect of Mobile Indoor Air Cleaners on the Risk of Infection with SARS-CoV-2 in Surgical Examination and Treatment Rooms with Limited Ventilation Options

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Oberst M ◽  
◽  
Klar T ◽  
Heinrich A ◽  
◽  
...  
Keyword(s):  
Indoor Air ◽  
High Efficiency ◽  
Air Filtration ◽  
Air Filter ◽  
Filter System ◽  
Air Cleaner ◽  
Air Cleaners ◽  
Total Particle ◽  
Poor Ventilation ◽  
Examination Room

Objective: Due to the airborne transmission of the Coronavirus Disease (Covid-19) via aerosols, we investigated the effect of a mobile air filter system in a surgical examination room. Methods: A mobile indoor air cleaner (AP 90, DEMA-airtech, Germany) was run during regular surgical consulting hour in our outpatient’s clinic. Aerosol concentration was measured by Fidas Frog fine dust monitoring system (Palas, Germany) by constantly recording PM1.0, PM2.5, PM4, PM10 and the total particle load PMtot. Results: The use of the air filter system led to a significant reduction of aerosols in the room despite the fact that there were various numbers of persons in the room constantly. Conclusion: The use of a high efficiency air filtration device, especially in examination rooms with poor ventilation, e.g., lack of windows or local exhaust is recommendable.

Gas Turbine Operation Offshore: Increased Operating Interval and Higher Engine Performance Through Optimized Intake Air Filter System

2016 ◽  
Author(s):  
Stian Madsen ◽  
Lars E. Bakken
Keyword(s):  
Gas Turbine ◽  
North Sea ◽  
Gas Turbines ◽  
High Efficiency ◽  
Salt Content ◽  
Engine Performance ◽  
Operational Experience ◽  
Air Filter ◽  
Filter System ◽  
Turbine Performance

Optimized operation of gas turbines is discussed for six LM2500PE engines at a Statoil North Sea offshore field. Three engines are generator drivers whilst three engines are compressor drivers. Two of the compressor drive engines are running at peak load (T5.4 control), hence the production rate is limited by the available power from these engines. All of the six engines discussed run continuously without redundancy, gas turbine uptime is therefore critical for the field’s production and economy. The performance and operational experience with upgraded inlet air filter systems and online water wash at high water-to-air ratio, as well as successful operation at longer intervals and higher average engine performance are described. For North Sea operation, a key property of the filter system is the ability to handle high humidity and high salt-content through the harsh environment in these waters. The upgraded filter systems analyzed in this paper is a 2-stage system (vane separator stage upstream of the high-efficiency-filter stage), which is a simplified design versus the old traditional 3-stage systems (louvre upstream and vane separator downstream of the filter stage). These 2-stage systems rely on an efficient upstream vane separator to remove the vast majority of water from the airflow before it reaches the high-efficiency filters. The high-efficiency filters are especially designed to withstand moisture. Deposit analysis from the downstream side of the filters has been performed. Extensive testing of both new and used filter elements, of different filter grade and operated at different intervals, has been performed on a filter test rig facility onshore. All six engines have historically been operated with 4-month intervals between maintenance stops. Online wash is performed daily between the maintenance stops at full load (i.e. normal operating load for the subject engine). As a result of successful development and pilot testing of new filters and optimized filter change intervals, as well as successful online water wash, the engine operating intervals are now extended to 6 months with very low deterioration rate. Understanding the gas turbine performance deterioration is of vital importance. Trending of its deviation from the engine baseline facilitates load-independent monitoring of the gas turbine’s condition. Instrument resolution and repeatability are key factors in order to get reasonable results from the performance analysis. Improvement of the package instrumentation has been implemented on three of the analyzed engines, for better performance monitoring. As a result of these analyses, a set of monitoring parameters is suggested for effective diagnostics of compressor degradation. Avenues for further research and development are proposed in order to further increase the understanding of the deterioration mechanisms and the gas turbine performance and response.

Evolution of Gas Turbine Intake Air Filtration in a 420 MW Cogeneration Plant

2014 ◽  
Author(s):  
Steve Ingistov ◽  
Michael Milos ◽  
Rakesh K. Bhargava
Keyword(s):  
Gas Turbine ◽  
Gas Turbines ◽  
Economic Benefits ◽  
Cogeneration Plant ◽  
Air Filtration ◽  
Air Filter ◽  
Filter System ◽  
Turbine Performance ◽  
Filtration System ◽  
Operational Data

A suitable inlet air filter system is required for a gas turbine, depending on installation site and its environmental conditions, to minimize contaminants entering the compressor section in order to maintain gas turbine performance. This paper describes evolution of inlet air filter systems utilized at the 420 MW Watson Cogeneration Plant consisting of four GE 7EA gas turbines since commissioning of the plant in November 1987. Changes to the inlet air filtration system became necessary due to system limitations, a desire to reduce operational and maintenance costs, and enhance overall plant performance. Based on approximately 2 years of operational data with the latest filtration system combined with other operational experiences of more than 25 years, it is shown that implementation of the high efficiency particulate air filter system provides reduced number of crank washes, gas turbine performance improvement and significant economic benefits compared to the traditional synthetic media type filters. Reasons for improved gas turbine performance and associated economic benefits, observed via actual operational data, with use of the latest filter system are discussed in this paper.

High-efficiency particulate air filter test stand and aerosol generator for particle loading studies

2007 ◽  
Vol 78 (8) ◽  
pp. 085105 ◽  
Author(s):  
R. Arunkumar ◽  
Kristina U. Hogancamp ◽  
Michael S. Parsons ◽  
Donna M. Rogers ◽  
Olin P. Norton ◽  
...  
Keyword(s):  
High Efficiency ◽  
Test Stand ◽  
Particle Loading ◽  
Air Filter ◽  
Aerosol Generator ◽  
Filter Test
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