Utility Perspective of Selecting Air Filter for Simple-Cycle, Heavy-Duty Combustion Turbines

1992 ◽  
Author(s):  
James W. Lyons ◽  
Alex Morrison
Keyword(s):  
Cost Benefit ◽  
Simple Cycle ◽  
Air Filtration ◽  
Heavy Duty ◽  
Air Filters ◽  
Air Filter ◽  
Filter System ◽  
Media Type ◽  
Air Inlet ◽  
Air Passage

The combustion turbines evaluated for this study range in size (nominal) from 80 MW to 100 MW and operate at a compression ratio between 10 and 14. Under these conditions the compressor ingests about 500,000 to 725,000 cubic feet of air per minute for its rated output. With this volume of air, even low concentrations of contaminants can result in a significant total amount of contaminants entering the unit, which may cause compressor erosion, fouling, and foreign object damage in the compressor section and cooling air passage blockage, locking of turbine blade roots, and hot corrosion or sulfidation in the turbine section. Adequate protection against the above mentioned degradation or damage due to poor air quality may be obtained by using properly designed air filters. An inadequate filter system or having no filter system results in a reduction in power and efficiency over the life of the unit and may significantly decrease the intervals between maintenance and thereby increase the cost of maintenance. Consideration should be given to adding an air inlet filter when or after the combustion turbine without air filter is overhauled to reduce future maintenance costs. This study investigates the need for an inlet air filtration system for the simple-cycle, heavy-duty combustion turbines from a cost/benefit and operation standpoint. Options for inlet air filters include a self-cleaning pulse type filter, a surface loading cartridge filter without pulse feature, and a three-stage depth loading type media type filter. Benefits are determined by estimates of improvements in performance and effects on the combustion turbine’s longevity and maintenance.

Utility Perspective of Selecting Air Filter for Simple-Cycle, Heavy-Duty Combustion Turbines

1993 ◽  
Vol 115 (3) ◽  
pp. 670-673
Author(s):  
J. W. Lyons ◽  
A. Morrison
Keyword(s):  
Cost Benefit ◽  
Simple Cycle ◽  
Air Filtration ◽  
Heavy Duty ◽  
Air Filters ◽  
Air Filter ◽  
Media Type ◽  
Air Inlet ◽  
Air Passage ◽  
Cooling Air

The combustion turbines evaluated for this study range in size (nominal) from 80 MW to 100 MW and operate at a compression ratio between 10 and 14. Under these conditions the compressor ingests about 500,000 to 725,000 cubic feet of air per minute for its rated output. With this volume of air, even low concentrations of contaminants can result in a significant total amount of contaminants entering the unit, which may cause compressor erosion, fouling, and foreign object damage in the compressor section and cooling air passage blockage, locking of turbine blade roots, and hot corrosion or sulfidation in the turbine section. Adequate protection against the above-mentioned degradation or damage due to poor air quality may be obtained by using properly designed air filters. An inadequate filter system or total lack of one results in a reduction in power and efficiency over the life of the unit and may significantly decrease the intervals between maintenance and thereby increase the cost of maintenance. Consideration should be given to adding an air inlet filter when or after the combustion turbine without air filter is overhauled to reduce future maintenance costs. This study investigates the need for an inlet air filtration system for simple-cycle, heavy-duty combustion turbines from a cost/benefit and operation standpoint. Options for inlet air filters include a self-cleaning pulse type filter, a surface loading cartridge filter without pulse feature, and a three-stage depth loading type media type filter. Benefits are determined by estimates of improvements in performance and effects on the combustion turbine’s longevity and maintenance.

scholarly journals Air filtration improvement of konjac glucomannan-based aerogel air filters through physical structure design

2021 ◽  
Author(s):  
Hong Qian ◽  
Ying Fang ◽  
Kao Wu ◽  
Hao Wang ◽  
Bin Li ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Surface Area ◽  
Physical Structure ◽  
Structure Design ◽  
Air Filtration ◽  
Air Filters ◽  
Air Filter ◽  
Purification Time

Abstract This study presents two methods to improve the air filtration performance of konjac glucomannan (KGM)-based aerogel air filters through physical structure design by changing the pore-size distribution and the surface area, using an air purifier. Results indicated that KGM-based aerogels had a comparable filtration effect with the commercial air filter with a longer purification time. This purification time could be shortened by over 50%, by changing the pore-size distribution from large size to small size or increase the surface area with the fold structure. This should boost the development of polysaccharide-based aerogel used as the air filter.

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.

scholarly journals PVP-Assisted Shellac Nanofiber Membrane as Highly Efficient, Eco-Friendly, Translucent Air Filter

2021 ◽  
Vol 11 (23) ◽  
pp. 11094
Author(s):  
Shanshuai Lu ◽  
Congling Li ◽  
Rui Liu ◽  
Aifeng Lv
Keyword(s):  
Mechanical Properties ◽  
Low Cost ◽  
Light Transmittance ◽  
Liquid Droplets ◽  
Air Filtration ◽  
Nanofiber Membrane ◽  
Air Filters ◽  
Air Filter ◽  
Highly Efficient ◽  
Pm2.5 And Pm10

Particulate matter (PM), composed of tiny solids and liquid droplets in polluted air, poses a serious threat to human health. Traditional air filters usually cause secondary pollution due to their poor degradability. Here, shellac, as an environmentally friendly natural organic material, was successfully applied to fabricate biodegradable air filters. Since pure shellac fiber shows poor mechanical properties and bad light transmittance, we then introduced a small amount of polyvinylpyrrolidone (PVP) in the shellac solution to prepare highly efficient air filter membranes by the electrospinning method. The prepared PVP-assisted shellac nanofiber membrane (P-Shellac FME) demonstrated improved filtration efficiencies as high as 95% and 98% for PM2.5 and PM10, respectively. The P-Shellac FME also showed good stability, with filtration efficiencies still above 90% and 95% for PM2.5 and PM10 even after six hours of air filtering under high PM concentrations. The pressure drop going through the filter was only 101 Pa, which is also comparable to the value of 76 Pa obtained using commercial polypropylene nanofibers (PP nanofibers, peeled off from the surgical mask), indicating good air permeability of P-Shellac FME. Additionally, P-Shellac FME also showed the advantages of translucence, biodegradability, improved mechanical properties, and low cost. We believe that the P-Shellac FME will make a significant contribution in the application of air filtration.

Utility parameters of air filters used in general ventilation and air conditioning systems - new requirements of standards and results of own research

2018 ◽  
Vol 561 (6) ◽  
pp. 16-21
Author(s):  
Tomasz Jankowski ◽  
Szymon Jakubiak
Keyword(s):  
Air Conditioning ◽  
Flow Resistance ◽  
Filtration Efficiency ◽  
Air Filtration ◽  
Air Filters ◽  
Air Filter ◽  
Aerosol Flow ◽  
Air Conditioning Systems

The article discusses the replacement of the existing standard for air filtration for general ventilation (PN-EN 779) with a series of standards PN-EN ISO 16890. This article presents current rules for testing and classification of air filters. The results of the study which investigated changes in filtration efficiency and aerosol flow resistance in the range of 0.3 μm to 10 μm were presented to determine the inclusion of an exemplary air filter in the group PM10, PM2,5 and PM1.

scholarly journals Operating properties of air inlet filters in a sports car engine

2017 ◽  
Vol 66 (2) ◽  
pp. 123-144
Author(s):  
Tadeusz Dziubak ◽  
Yuriy Yendzheyovskyy
Keyword(s):  
Absorption Coefficient ◽  
Flow Resistance ◽  
Motor Vehicles ◽  
Test Results ◽  
Particle Fraction ◽  
Air Filters ◽  
Air Filter ◽  
Air Inlet ◽  
The Impact ◽  
Dust Absorption

There are presented design solutions and operation properties of air inlet filters of motor vehicles and sports cars. An analysis of the impact of the use of a sports car air filter in a passenger car was performed. The effect of this change on the increase in power and torque in several car engines was shown. The conditions and methodology of sports car air filter studies have been developed. A research stand with a particle counter was presented. The test results on the characteristics of efficiency and accuracy filtration and flow resistance of two sports air filters were presented. Each filter was tested at a different filtration rate. The dust absorption coefficient of the sport filter was determined. The dust particle fraction in the air purified behind the filter was calculated. Keywords: engine, air filter, sports filter, filtration efficiency and filtration accuracy, flow resistance, dust absorption coefficient, particle size

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.

scholarly journals Eco-Friendly Poly(Vinyl Alcohol) Nanofiber-Based Air Filter for Effectively Capturing Particulate Matter

2021 ◽  
Vol 11 (9) ◽  
pp. 3831
Author(s):  
Han-Jung Kim ◽  
Dong-In Choi ◽  
Sang-Keun Sung ◽  
Su-Han Lee ◽  
Sang-Jin Kim ◽  
...  
Keyword(s):  
Particulate Matter ◽  
Quality Factor ◽  
Vinyl Alcohol ◽  
Nonwoven Fabric ◽  
Poly Vinyl Alcohol ◽  
Contamination Level ◽  
Plastic Pollution ◽  
Air Filters ◽  
Air Filter ◽  
Filter Surface

Due to the increasing use of polypropylene-based nonwoven dust masks and air filters, environmental problems that occur due to the plastic pollution resulting from the disposal of these materials have also increased. Hence, an eco-friendly air filter based on PVA nanofibers (NFs) was fabricated by electrospinning on a nonwoven fabric, and its performance was evaluated as a filter capable of blocking or capturing particulate matter. The quality factor of the optimized PVA NF-based air filter was found to be 0.010606 Pa−1, which is lower than that of a HEPA filter (0.015394 Pa−1), but higher than that of a cabin air filter (0.010517 Pa−1) and a dust mask (0.009102 Pa−1). The contamination level of the PVA NF-based filter was analyzed by optical and structural analyses of the filter surface. Finally, the filter was soaked in water to selectively remove the contaminated PVA NF layer, and the remaining nonwoven fabric was able to be reused to make the filter.

scholarly journals Dissemination of Cronobacter spp. (Enterobacter sakazakii) in a Powdered Milk Protein Manufacturing Facility

2008 ◽  
Vol 74 (19) ◽  
pp. 5913-5917 ◽  
Author(s):  
N. Mullane ◽  
B. Healy ◽  
J. Meade ◽  
P. Whyte ◽  
P. G. Wall ◽  
...  
Keyword(s):  
Milk Protein ◽  
Microbial Contamination ◽  
Protein Processing ◽  
Pulsed Field Gel Electrophoresis ◽  
Enterobacter Sakazakii ◽  
Powdered Milk ◽  
Air Filters ◽  
Air Filter ◽  
Manufacturing Facility ◽  
Processing Facility

ABSTRACT The microbial contamination of air filters and possible links to contaminated product in a powdered milk protein-processing facility were investigated. Over a 10-month period, seven air filters, the environment, and powdered product were analyzed for the presence of Cronobacter spp. The effects of air filter installation, maintenance, and subsequent dissemination of Cronobacter were investigated. A total of 30 isolates were characterized by pulsed-field gel electrophoresis (PFGE). PFGE revealed the presence of three clonal populations distributed throughout the manufacturing site. This study highlights the need for proper installation of air filters to limit the dissemination of microorganisms into processing sites.

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