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Simulation of Hybrid Packed Desiccant beds for De-humidification and Drying

Vellore Inst. of Technology, Vellore-Selvaraji Muthu, Sekarapandian N
  • Technical Paper
  • 2020-28-0019
To be published on 2020-04-30 by SAE International in United States
The conventional vapour compression refrigeration cycle based air dryers are used widely for the applications requiring pressure dew point temperature ranging between 2°C to 3°C. However, for the industrial and pneumatic applications, the required pressure dew points are as low as between -10°C to -75°C. This kind of low pressure dew points can be achieved by the adoption of adsorption based packed bed desiccant dryer technology. In this paper the numerical investigation of the performance of a packed bed desiccant dryer containing homogenous mixture of multiple desiccant types along the vertical axial direction using an in-house finite volume based CFD code is presented. The developed code has the capability to model the coupled heat and mass transfer taking place in a packed hybrid bed desiccant dryer during the adsorption and desorption phases. The numerical results obtained for the base model are validated against relevant experimental data for exit air temperature and moisture content available in the literature and found to have good agreement. Subsequently using the validated numerical model, the improvement in moisture removal capacity,…
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Lubricant Application, Solid Film, Heat Cured, Corrosion Inhibiting

E-25 General Standards for Aerospace and Propulsion Systems
  • Aerospace Standard
  • AS5528D
  • Current
Published 2020-03-10 by SAE International in United States
This SAE Aerospace Standard (AS) establishes the surface pretreatment, temperature, and baking time required to cure AS5272 lubricant when it is applied over the surfaces of manufactured parts of various metals.
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The Influence of the Content and Nature of the Dispersive Filler at the Formation of Coatings for Protection of the Equipment of River and Sea Transport

SAE International Journal of Materials and Manufacturing

Ivano-Frankivsk National Medical University, Ukraine-Liubov Poberezhna
Kherson State Maritime Academy, Ukraine-Oleksandr Sapronov, Andriy Buketov, Anna Sapronova, Vitalii Sotsenko, Mykola Brailo, Serhii Yakushchenko, Serhii Smetankin, Andriy Kulinich, Viacheslav Kulinich
  • Journal Article
  • 05-13-01-0006
Published 2020-01-23 by SAE International in United States
To protect ship equipment of river and sea transport, it is suggested to use polymeric protective coatings based on epoxy diane oligomer ED-20, polyethylene polyamine (PEPA) curing agent and filler, which is a departure from industrial production. Thus the purpose of the work is analysis of major dependency of the properties on the content of fillers that allowed to revealed the critical filler content (furnace black) in composites to form a protective coating with the required set of characteristics. The infrared (IR) spectral analysis was used to investigate the presence of bonds on the surface of particles of the PM-75 furnace black, which allows us to assess the degree of cross-linking of the polymer. The influence of the content of dispersed furnace black on the physicomechanical and thermophysical properties and the structure of the protective coating is investigated. For the formation of the coating with increased adhesive properties, the optimum content of the additive is q = 25 parts by weight (pts.wt.), due to the increase in the number of C—O, C—C, C═O, C═C, C═O,…
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OEM Plastic Parts Repair

Motor Vehicle Council
  • Ground Vehicle Standard
  • J1573_201910
  • Current
Published 2019-10-24 by SAE International in United States
This SAE Recommended Practice defines the information required to repair the various types of plastics found on modern light-duty highway vehicles. Information is included for the repair and refinishing of most plastic body parts, both interior and exterior. Repair information is described for all commonly used plastics including, but not limited to, polyurethanes, polycarbonate blends, modified polypropylenes, polyethylenes and nylons. Repairs can be made to these types of plastics using two-part (2K) repair adhesives, plastic welding, and other materials available from body shop suppliers. When a new type of plastic is being introduced to the market through a new vehicle program, specific repair and refinishing procedures should be provided, following the format in this document. Sheet-molded compounds (SMC), fiber-reinforced plastics (FRP) and carbon fiber reinforced plastics can also be repaired using slightly different procedures and repair materials.
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The Selection of Adhesives for the Attachment of Exterior Aftermarket Accessories

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2375_201910
  • Current
Published 2019-10-03 by SAE International in United States
The scope of this SAE Recommended Practice is to provide a mechanism for the proper surface preparation and selection of adhesive for the attachment of exterior aftermarket accessories.
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Local Weakening of Honeycomb Core for Improved Surface Quality and Bonding in Co-Cured Sandwich Panels

Hamburg University of Technology-Henrik Eschen, Thorsten Schüppstuhl
Published 2019-09-16 by SAE International in United States
Sandwich panels made of Nomex honeycomb core and fiber reinforced face sheets are a major component of aircraft interior parts. A common way to locally increase the strength of such panels, e.g. for load introduction, is the local thickening of the face sheets with additional prepreg layers. Curing of strengthened panels without further processing of the core leads to higher flatness tolerances as well as residual stresses. Machining of the core in the strengthened areas is possible, but expensive due to high machine costs and additional cleaning processes. In this paper a new process for the reduction of the residual stresses in strengthened areas, as well as improved bonding between core and face sheets is presented. The process is based on local reduction of the compressive strength in the surface area of the honeycomb core, which allows for controlled, irreversible deformation at curing pressure. For the reduction of compressive strength, a concept based on a robot guided tool with multiple blades is presented. The process parameters impacting the compressive strength after weakening are derived based…
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New and Newly Retreaded Tire Appearance

A-5C Aircraft Tires Committee
  • Aerospace Standard
  • ARP6307A
  • Current
Published 2019-07-02 by SAE International in United States
This document is for establishing and addressing anomalies on appearance of new and newly retreaded tires prior to installation on aircraft. It is intended to use cosmetics as well as functionality to make a determination of acceptability. However, if cosmetic appearance is not a requirement, use the inspection criteria from ARP6225. This ARP does not supersede (E)TSO-C62 minimum requirements, including marking requirements.
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Test Method for Measuring Wet Color Transfer Characteristics

Textile and Flexible Plastics Committee
  • Ground Vehicle Standard
  • J1326_201906
  • Current
Published 2019-06-25 by SAE International in United States
This procedure describes a method of measuring the resistance to wet color transfer of materials such as textiles, leather, and composites.
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Sealing Compound Aircraft Firewall, Silicone

AMS G9 Aerospace Sealing Committee
  • Aerospace Material Specification
  • AMS3374F
  • Current
Published 2019-05-31 by SAE International in United States
This specification covers six types of silicone sealing compounds curing to elastomeric materials.
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For bonding dissimilar materials, adhesives can be a sticking point-or lack of it

Automotive Engineering: May 2019

Stuart Birch
  • Magazine Article
  • 19AUTP05_14
Published 2019-05-01 by SAE International in United States

As the auto industry adopts an increasingly wide mix of materials in its pursuit of constantly tougher weight-saving and service-longevity targets, joining mixed materials using precisely-compatible adhesives is a crucial aspect of the formula. Considering the expanding role of adhesives in the mixed-materials matrix, a new warning to design engineers comes from Peter Swanson, Managing Director of adhesives specialist Intertronics, of the need to fully appreciate through-life performance.

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