An optimization approach for fabricating electrospun nanofiber air filters with minimized pressure drop for indoor PM2.5 control

2020 ◽  
pp. 107449
Author(s):  
Zhuolun Niu ◽  
Ye Bian ◽  
Tongling Xia ◽  
Li Zhang ◽  
Chun Chen
Keyword(s):  
Pressure Drop ◽  
Optimization Approach ◽  
Electrospun Nanofiber ◽  
Air Filters ◽  
Indoor Pm2.5

Preparation and Oil Filtration Properties of Electrospun Nanofiber Composite Material

2014 ◽  
Vol 9 (4) ◽  
pp. 155892501400900 ◽  
Author(s):  
Jian Yong Feng ◽  
Jian Chun Zhang ◽  
Daxiang Yang
Keyword(s):  
Composite Material ◽  
Pressure Drop ◽  
Pore Diameter ◽  
Engine Oil ◽  
Electrospun Nanofiber ◽  
Nanofiber Composite ◽  
Automobile Engine ◽  
Pulp Paper ◽  
The Difference ◽  
Oil Filtration

In this paper, PVA electrospun nanofiber was prepared on the surface of three different automobile engine oil filtration materials including polyester nonwoven, glass fiber nonwoven, and cotton pulp filtration paper. It was found that the substrate of cotton pulp filtration paper and the nanofiber layer had better adhesive effect. Then we A comparison of fiber diameter, pore diameter, filtration accuracy and pressure drop between the cotton pulp paper and nanofiber composite filtration material was then made. The results show that the nanofiber composite material had smaller pore diameter and filtration accuracy, higher pressure drop, and better oil filtration property. Additionally, the difference of pressure drop between the substrate and nanofiber composite material increased with increasing flow rate of experimental oil. The goal of this paper was use the electrospun nanofiber in the automobile engine oil filtration.

Aspects of the Increase in Pressure Drop of High-Efficiency Particulate Air Filters Under Fog Conditions

1990 ◽  
Vol 92 (1) ◽  
pp. 50-65
Author(s):  
Craig I. Ricketts ◽  
Volker Rüdinger ◽  
Jürgen G. Wilhelm
Keyword(s):  
Pressure Drop ◽  
High Efficiency ◽  
Air Filters

Experiment and Simulation on Pressure Drop of Pleated Air Filters

2014 ◽  
Vol 960-961 ◽  
pp. 568-573
Author(s):  
Hai Ming Fu ◽  
Yu Fu ◽  
Fang Xu
Keyword(s):  
Numerical Simulation ◽  
Pressure Drop ◽  
Theoretical Calculations ◽  
Unit Length ◽  
Navier Stokes ◽  
Field Variation ◽  
Filtration Process ◽  
Navier Stokes Equation ◽  
Air Filters ◽  
Air Filter

In order to reduce pressure drop of filtration process and increase filtration area, filtration media would usually made into pleated shape. The designs of pleats numbers and pleats height in the unit length have greatly impacted on pressure drop of the filtration process. In this paper, filter pressure drop of pleated air filters were examined by theoretical, experimental and simulation studies. By solving pressure drop from the Navier-Stokes equation on basis of velocity function assumption, by using the concept of average pressure drop in wind gap width, pressure drop in pleated filters was calculated. The numerical simulation of pleated filtration media was developed via using FLUENT software package and flow field variation in gap of pleated media was simulated. The results of theoretical calculations were in agreement with experimental results. It was confirmed that reducing pleat spacing or increasing pleats height could increased the area of filtration media and reduce the overall pressure drop of filters, although structure pressure drop increased. There were best value between pressure drop of pleated air filters and pleat numbers in the unite length. Key words: filtration medium; pressure drop; numerical simulation; air filter; pleated structure

Economical Benefits of Highly Efficient Three-Stage Intake Air Filtration for Gas Turbines

2008 ◽  
Author(s):  
Thomas Schroth ◽  
Michele Cagna
Keyword(s):  
Pressure Drop ◽  
Power Output ◽  
Gas Turbines ◽  
The Other ◽  
Air Filtration ◽  
Air Filters ◽  
Filter Performance ◽  
Other Hand ◽  
Air Intake ◽  
The One

In recent years, users and OEMs of gas turbines are focusing more and more on the quality of the combustion air, since turbo machines have become more sensitive to fouling of the compressor blades. High-quality air filters are able to reduce the fouling on the blades and enable stable power output P and efficiency η. Continuous development of filter media and filter construction have improved the filter performance in the past. Will there be further steps towards even better air filtration for gas turbines or has the development reached a plateau? The answer to this question can be found in an economic analysis taking into account a reduction of fouling due to better combustion air quality on the one hand and higher investment costs and higher pressure drop in the air intake on the other hand. The evaluations and calculations are accomplished at so-called static filter systems where air filters with depth loading characteristics are used. With static filter systems several steps of filtration are arranged in a sequence and therefore the examined upgrades of the filtration efficiencies can be implemented relatively easy so that the effect could be studied. A comparison of two- and three-stage filter systems for intake air filtration at gas turbines produces important findings regarding the most operationally cost-efficient filter sequence overall. The upgrade of the air intake system on the one hand resulted in an increased static pressure loss in the air intake causing reduced turbine efficiency and less power output. On the other hand at the same time the soiling of the blades mainly in the compressor section (compressor fouling) is lowered and as a consequence efficiency and power output are enhanced. The effects of a higher pressure drop entailed by three-stage filtration are compared with those arising from reduced soiling on the blades. In the cases examined, including case studies from actual operation, definite advantages are found for three-stage filtration with the filter sequence F6-F9-H11 in conformity with EN 779 and EN 1822. Even the modification costs for installing another filter stage can be amortized in what will sometimes be significantly less than two years.

Oil-treated pleated fibrous air filters for motor vehicle engine intake application

2019 ◽  
Vol 234 (2-3) ◽  
pp. 702-713
Author(s):  
Ajay Kumar Maddineni ◽  
Dipayan Das ◽  
Ravi Mohan Damodaran
Keyword(s):  
Pressure Drop ◽  
Motor Vehicle ◽  
Life Time ◽  
Filtration Efficiency ◽  
Air Filters ◽  
Air Filter ◽  
Filtration Performance ◽  
Vehicle Engine ◽  
Air Intake ◽  
The Difference

In this work, oil-treated pleated fibrous air filters were developed, characterized, and evaluated for motorcycle engine intake application. The effect of pleat geometry on the filtration performance was examined. Pleat pitch and pleat height were found to play important roles in determining the filtration efficiency, pressure drop, and dust holding capacity. A pleated fibrous filter prepared with optimum levels of pleat pitch and pleat height showed the best filtration performance. The treatment to the pleated filter by viscous oil yielded remarkably higher dust holding capacity and filtration efficiency, both at cleaned and clogged conditions. A statistical analysis revealed that the weight of oil played a significant role in deciding the filtration performance. The oil-treated pleated filter was installed in a commercial air intake system and its filtration performance was assessed. The filter element displayed a significant delay in evolution of pressure drop during dust loading as compared to the untreated one. However, the difference in filtration efficiency between the oil-treated and untreated filter elements was not found to be too high. Nevertheless, both of them met the standard filtration performance as per the best practices followed by the automotive industry. Overall, the oil treatment to cellulosic filters was found to be highly advantageous for motorcycle application. Practical implications of such air filter system were discussed in terms of service life, fuel consumption, and CO2 emission during filter life time.

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