Hollingsworth & Vose GmbH Hall 7 / R27

Typically, to achieve higher dirt holding capacity (DHC) for a given efficiency, a filter media is designed to be dual phase with a gradient density in Z direction. Hollingsworth and Vose’s (H&V) newest development called ProLine(R) Filter media not only provides gradience in density but also provides gradience in fiber orientation. This makes it the best filter media in the market for a number of applications spanning both air and liquid filtration.

This new patented platform of media has significant improvement in DHC (up to 100%) and air permeability (up to 40%) for a given efficiency. Substantial rearrangement of fibers generates higher surface area and new channels for air and liquid contamination capture. As a result, filter elements produced with these media can offer a significant improvement in service life, reduced pressure drop or a combination thereof. ProLine allows to modify media basis weight and get similar performance, which could be translated into less media consumption into the filter. Initial development of these novel media is focused on applications in hydraulic, fuel and engine air filtration.

This paper present the media’s surface morphology is characterized by using 3D surface analyzer and X-ray Micro CT Tomography. Quantitative characterization of media disruption caused by Proline(R) treatment involved assessing variations in out-of-plane orientation, specifically the orientation of fibers relative to the thickness axis of the web, across the media thickness.

In addition, a model was developed, quantifying the total cost of ownership (TCO) and optimal filter replacement time for the hydraulic filtration system. The TCO includes costs of the filter element, its installation and disposal and the costs of the energy needed to operate the pump. The model combines the results of the element characterization via the ISO16899 Multi-Pass test with realistic assumptions on the hydraulic system operating conditions. Presented TCO comparisons quantify the value proposition of the elements with the ProLine media for the end-user.

Gas phase filtration has gained much attention due to increased pollution level, growing public awareness and issued guidelines by regulatory bodies on global air quality¹. In the cabin air segment, OEMs and filter element manufacturers demand higher removal efficiency of VOCs and harmful toxic gases, in addition to high particulate filtration targets, dust holding capacity and lower pressure drop. To address these challenges, we will describe an innovative media, that combines high-quality adsorbent layer and next-generation particulate filter layers for improved performance. This data will be supported by computational modeling.

In this study, we illustrated the media developing workflow through a case study to meet element performance and VOC removal requirements. An alternative carbon composition was engineered based on the model. Its performance was further confirmed via in-house flat sheet media testing. Finally, the optimized solution was validated through complete filter element testing.

The semi-analytical model developed in this work has demonstrated the capability to predict the adsorption performance of flat sheet carbon media and pleated filter elements for multiple application environments involving different flow rates, various upstream concentration levels, and a wide range of carbon add-on in the media.

Heating, Ventilation and Air Conditioning (HVAC) units utilize a significant amount of energy in our buildings, hence improving energy efficiency and reducing the cost of ownership is particularly important. The importance of energy savings is reflected globally. For example, the European Union has agreed on a set of measures to make Europe a carbon neutral continent by 2050 (1). As 40 % of the annual energy-consumption in Europe is generated in the building sector (2), it is no surprise that one set of initiatives of the European Green Deal is built around energy efficient buildings. In an HVAC system, savings can come from better fans, better heat exchange or energy efficient air filtration. In this paper, we will address solutions to improve the energy efficiency of the filtration media using novel nonwoven solutions.

Traditionally, single layer and dual layer media have been used to achieve efficiency and capacity of pocket filter media. However, for energy savings, pressure drop of the filter is the key parameter. Hence, 3D composites using waved media have been developed to reduce pressure drop and increase capacity. An example from our data analysis showed that waved 3D filter media can achieve up to 4 times higher Dust Holding Capacity (Lifetime) at 250 Pa filter element pressure drop compared to traditional pocket filter media. In summary...