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Occupant Controlled Ventilation

Mahindra & Mahindra, Ltd.-Priyanka Marudhavanan
  • Technical Paper
  • 2019-28-2461
To be published on 2019-11-21 by SAE International in United States
Keywords-Coolant,Ventilation Research and/or Engineering Questions/Objective: Number of Occupants is the major parameter when we consider Air Conditioning System. The number of person who stays in the room may vary in the same way the person who travels in the automobile also vary throughout the distance. This is more prevalent in transportation system like bus, train and where lot of people will travel together and where dropping station in the vehicle is too frequent.In this type,operating A.C has to be varied Methodology: . Instead the number count in the vehicle will be monitored from time to time. Based on the number of count, the cabin has to be cooled or heated and accordingly corresponding power has to be drawn by the compressor from the engine. This human count can be detected based on the number of CO2 sensor located in the cabin. the amount of fresh air that should be added to a cabin can be controlled by a carbon dioxide level transmitter. When CO2 levels go up, fresh air is added until the CO2 levels…
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WIRE, ELECTRICAL, POLYTETRAFLUOROETHYLENE/POLYIMIDE INSULATED, LIGHT WEIGHT, NICKEL COATED, COPPER CONDUCTOR, 260 °C, 600 VOLTS, ROHS

AE-8D Wire and Cable Committee
  • Aerospace Standard
  • AS22759/92C
  • Current
Published 2019-10-22 by SAE International in United States
No Abstract Available.
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Aircraft New Tire Standard - Bias and Radial

A-5C Aircraft Tires Committee
  • Aerospace Standard
  • AS4833A
  • Current
Published 2019-10-17 by SAE International in United States
This SAE Aerospace Standard (AS) sets forth criteria for the selection and verification processes to be followed in providing tires that will be suitable for intended use on civil aircraft. This document encompasses new and requalified radial and bias aircraft tires.
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Assessment of Numerical Cold Flow Testing of Gas Turbine Combustor through an Integrated Approach Using Rapid Prototyping and Water Tunnel

Indian Institute of Technology Madras-Ssheshan Pugazhendhi
SRM Institute of Science and Technology-Sundararaj Senthilkumar
Published 2019-10-11 by SAE International in United States
In the present work, it is aimed at developing an integrated approach for combustor modeling involving rapid prototyping and water tunnel testing to assess the cold flow numerical simulations; the physical model will be subjected to cold flow visualization and parametric studies and CFD analysis to demonstrate its capability for undergoing rigorous cold flow testing. A straight through annular combustors is chosen for the present study because of it has low pressure drop, less weight and used widely in modern day aviation engines.Numerical Analysis has been performed using ANSYS-FLUENT. Three dimensional RANS equations are solved using k-ɛ model for the Reynolds numbers ranging from 0.64 x 105-1.5 x 105 based on the annulus diameter. Post processing the results is done in terms of jet penetration, formation of recirculation zone, effective mixing, flow split and pressure drop for different cases. Physical combustor models are fabricated using Rapid prototyping with Poly Lactic Acid material and approximated 2D combustor model is used for capturing important flow patterns using high speed camera in 2D water tunnel, and for pressure…
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Numbering System for Multiple Diameter Cutting Tools

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2276_201910
  • Current
Published 2019-10-09 by SAE International in United States

This SAE Recommended Practice provides a systematic method for the identification of multiple diameter cutting tools. It is intended to assist in the cataloging and supplying of these tools.

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Numbering System for Taps

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2123_201910
  • Current
Published 2019-10-09 by SAE International in United States

This SAE Recommended Practice provides a systematic method for the identification of ground thread taps for inch sizes up to 9.999 in with a Maximum Thread-per-Inch of 99.9, and Metric sizes up to 99.9 mm with a Maximum pitch of 9.99 mm. It is intended to assist in the cataloging and supplying of these tools. It is not intended for ACME, Buttress, or similar type thread forms.

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Numbering Systems for End Mills

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2342_201910
  • Current
Published 2019-10-09 by SAE International in United States

This SAE Recommended Practice provides a systematic method for the identification of End Mills. It is intended to assist in the cataloging and supplying of these tools.

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Numbering System for Single Diameter and Taper Reamers

Motor Vehicle Council
  • Ground Vehicle Standard
  • J2124_201910
  • Current
Published 2019-10-09 by SAE International in United States

This SAE Recommended Practice provides a systematic method for the identification of single diameter and taper reamers. It is intended to assist in the cataloging and supplying of these tools.

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A Coupled Lattice Boltzmann-Finite Volume Method for the Thermal Transient Analysis of an Air-Cooled Li-Ion Battery Module for Electric Vehicles with Porous Media Insert Modeled at REV Scales

University of Rome Niccolò Cusano-Daniele Chiappini, Laura Tribioli
University of Rome Tor Vergata-Gino Bella
Published 2019-10-07 by SAE International in United States
Lithium ion batteries are the most promising candidates for electric and hybrid electric vehicles, owe to their ability to store higher electrical energy. As a matter of fact, in automotive applications, these batteries undergo frequent and fast charge and discharge processes, which are associated to internal heat generation, which in turns causes temperature increase. Thermal management is therefore crucial to keep temperature in an appropriate level for safe operation and battery wear prevention.In a recent work authors have already demonstrated the capabilities of a coupled lattice Boltzmann-Finite Volume Method to deal with thermal transient of a three-dimensional air-cooled Li-ion battery at different discharging rates and Reynolds numbers. Here, in order to improve discharge thermal capabilities and reduce temperature levels of the battery itself, a layer of porous medium is placed in contact with the battery so to replace a continuum solid aluminum layer. Many studies, which have already demonstrated how the porous media can improve thermal performance of heat exchange systems, are present in recent literature. There is a large number of models for representing…
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Invisible Tags Write, Read, and Erase Using Light

  • Magazine Article
  • TBMG-35269
Published 2019-10-01 by Tech Briefs Media Group in United States

A method was developed that enables information to be contained in simple plastic foils with a thickness of less than 50 μm, which is thinner than a human hair. Organic luminescent molecules are introduced into the transparent plastic foils. In the beginning, these molecules are in an inactive, dark state; by locally using ultraviolet irradiation, it is possible to turn this dark state into an active, luminescent one.