scholarly journals Evaluation of Air Filter Test Methods

1965 ◽  
Author(s):  
James W. May
Keyword(s):  
Test Methods ◽  
Test Method ◽  
Atmospheric Dust ◽  
Air Filters ◽  
Air Filter ◽  
Air Stream ◽  
Clean Air ◽  
Filter Test

There are three generally accepted test methods in current use for determining the effectiveness of air filters used for the collection of atmospheric dust. These three methods are (a) weight, (b) dust spot, and (c) DOP, which uses dioctyl-phylate as the aerosol. These test methods are discussed briefly and illustrations are used to assist the reader in visualizing the concentration of dust which will remain in the clean-air stream for efficiency values reported by each test method.

scholarly journals Recent advances in antimicrobial air filter

2018 ◽  
Vol 67 ◽  
pp. 03016 ◽  
Author(s):  
A.A.I.A.S. Komaladewi ◽  
K. Khoiruddin ◽  
I.W. Surata ◽  
I.D.G.A. Subagia ◽  
I.G. Wenten
Keyword(s):  
Air Quality ◽  
Fine Particles ◽  
Antibacterial Properties ◽  
Antimicrobial Activities ◽  
Inorganic Nanoparticles ◽  
Secondary Source ◽  
Air Filters ◽  
Air Filter ◽  
Air Stream ◽  
And Performance

The worsening air quality has become an environmental issue since it has a serious effect on human health. This is generally attributed to airborne particles including various pathogens and others fine particles. Even though air filters show excellent removal efficiency towards pathogens, the captured microorganism can remain viable in the filter, grow, and re-suspended into an air stream resulting in a secondary source of pollutants. Considerable studies have been conducted to develop air filters which also have antibacterial properties for solving this issue. Results of several studies showed that air filters with antimicrobial activities have been successfully prepared by incorporating inorganic nanoparticles and natural plant extracts. With antibacterial properties, the air filters may be potentially used to control air quality, particularly for indoor spaces e.g. hospitals, by removing fine particles and inhibiting microorganism. In this paper, the recent development of antimicrobial air filter is reviewed. In addition, preparation and performance of developed antimicrobial filters are discussed. Prospects and challenges of antimicrobial air filter are also pointed out.

scholarly journals The Selection Process and Comparative Air Filter Performance Testing for Combustion Turbine Inlet Air Filters

1993 ◽  
Author(s):  
Dave Gidley ◽  
Frederick M. Fritz ◽  
Henry H. S. Yu
Keyword(s):  
Particle Size ◽  
Performance Testing ◽  
Standard Test ◽  
Test Method ◽  
Outdoor Air ◽  
Air Filters ◽  
Air Filter ◽  
Filter Performance ◽  
Turbine Inlet ◽  
Standard Tests

Designers, OEM’s and Users have available to them a variety of standard air filter performance tests that can be used and currently are being used to specify inlet air filters for combustion turbines. These standard tests for the most part have been developed for the heating, ventilating and air conditioning industry using developed synthetic dust that simulates an air composition comprised of mostly recirculated air blended with outdoor make-up air. Other available standard tests and standard test dusts have been developed for diesel and gasoline powered engines. To our knowledge no standard air filter test method has been developed for filters to be used on combustion turbine air intakes using typical outdoor air. In our opinion, a standard test relating to 100% outdoor air, pressure drop rise over time, particle size and the particle size distribution most commonly recorded at combustion turbine installation sites would be beneficial in specifying and selecting the “best” filter for todays’ combustion turbine applications. This paper will review and compare the various air filter tests currently used for combustion turbine inlet filtration selection and recommend an all-inclusive test standard that could be used in the future.

scholarly journals CARBON TECHNOLOGY ACTIVE COCONUT SHELL ON AIR FILTER MEDIA FOR DOMESTIC WASTE AIR WASTE

2021 ◽  
Vol 1 (1) ◽  
pp. 42-49
Author(s):  
Dedy Khaerudin ◽  
Asep Rahmatullah
Keyword(s):  
Activated Carbon ◽  
Central Government ◽  
Irrigation System ◽  
Domestic Waste ◽  
Air Filters ◽  
Air Filter ◽  
Waste Air ◽  
Clean Air ◽  
Coconut Shells ◽  
The Village

Clean availability air used when coming from wells (air land) for the needs of everyday residents, air conditions are very murky, yellow, sour and post-idanan from the pollution of domestic waste air from waste air laundry, bathroom, toilet waste and the rest of the rice field irrigation system, although currently Kp. Sendal Kopo, Panenjoan Village has a unit of clean air water is the top thing to treat the surrounding residents Community-Based Sanitation (Sanimas) from the central government is limited only dipoman air waste household results to irrigate rice fields, not for air needs One way in processing ground air by designing air filters from PVC pipes using activated carbon media from coconut shells and additional media foam filter, injury, zeolite stone, activated carbon and sand silica for air to make the air good air. Simple air filter everywhere in Kp.Sendal Kopo, Panenjoan Village, Carenang District, Serang District, Banten Province. Any activity there provides favours throughout the community Kp. Sendal Kopo, Village Panenjoan RT / RW: 004/01 involved in the workshop of making simple air filters and counselling will maintain and manage clean air so that with the village Of Panenjoan will be murky and political air into air that has standard air through clean air design intalasi air

scholarly journals Problems of selecting filter partition in passenger car engine intake air filters

2021 ◽  
Author(s):  
Tadeusz Dziubak ◽  
Leszek Bąkała
Keyword(s):  
Pressure Drop ◽  
Operating Conditions ◽  
Negative Effects ◽  
Passenger Cars ◽  
Engine Operation ◽  
Air Filters ◽  
Passenger Car ◽  
Air Filter ◽  
Air Stream ◽  
Filtration Area

The aim of this study was to verify the criteria for selecting pleated filter partitions used in passenger car engine filters. The paper presents the problem of optimizing pleated air filters in the dir ection of minimizing pressure drop, which is the source of engine energy losses. Two criteria for selection of a paper filter partition for specific operating conditions of the filter and the engine are presented: criterion of permissible separation speed and criterion of permissible pressure drop. The actual filtration area of 44 paper pleated filter elements used in passenger cars and the air stream flowing through the filter were determined, which made it possible to calculate separation speed. In 62% of the analyzed filter inserts, the calculated separation speeds are within the speed range recommended by the constructors, Fmax = 0,06-0,12 m/s. Exceeding permissible separation speed Fmax = 0,12 m/s was found mainly in supercharged engines. Negative effects of engine operation with an air filter with too small separation area are presented, in the form of increased pressure drop and energy loss of the engine as well as shorter car mileage to reach permissible pressure drop.

An evaluation of ECT sample height for small flute board grades and Box Manufacturer’s Certification compliance

TAPPI Journal ◽  
2009 ◽  
Vol 8 (6) ◽  
pp. 24-28
Author(s):  
CORY JAY WILSON ◽  
BENJAMIN FRANK
Keyword(s):  
Compressive Strength ◽  
Compressive Load ◽  
Test Sample ◽  
Test Methods ◽  
Test Method ◽  
Initial Development ◽  
Sample Height ◽  
Relationship Of ◽  
The Relationship ◽  
Corrugated Fiberboard

TAPPI test T811 is the specified method to ascertain ECT relative to box manufacturer’s certification compliance of corrugated fiberboard under Rule 41/ Alternate Item 222. T811 test sample heights were derived from typical board constructions at the time of the test method’s initial development. New, smaller flute sizes have since been developed, and the use of lighter weight boards has become more common. The T811 test method includes sample specifications for typical A-flute, B-flute, and C-flute singlewall (and doublewall and triplewall) structures, but not for newer thinner E-flute or F-flute structures. This research explores the relationship of ECT sample height to measured compressive load, in an effort to determine valid E-flute and F-flute ECT sample heights for use with the T811 method. Through this process, it identifies challenges present in our use of current ECT test methods as a measure of intrinsic compressive strength for smaller flute structures. The data does not support the use of TAPPI T 811 for ECT measurement for E and F flute structures, and demonstrates inconsistencies with current height specifi-cations for some lightweight B flute.

Sign in / Sign up

Export Citation Format

Share Document