Liquefied natural gas fuel tank
This presentation is the property of its rightful owner.
Sponsored Links
1 / 21

Liquefied Natural Gas Fuel tank PowerPoint PPT Presentation


  • 139 Views
  • Uploaded on
  • Presentation posted in: General

MAE 435 – Final Presentation Advisor: Dr. Zhang Liebherr representative: James Whitfield - Albert Ochagavia - Pithan Rojanavongse -Josh Harris - J ohn Alexander. Liquefied Natural Gas Fuel tank. LNG Background. What is LNG? Liquefied Natural Gas -162 ° C 1/600 volume of Natural Gas

Download Presentation

Liquefied Natural Gas Fuel tank

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Liquefied natural gas fuel tank

MAE 435 – Final Presentation

Advisor: Dr. Zhang

Liebherr representative: James Whitfield

-Albert Ochagavia

-PithanRojanavongse

-Josh Harris

-John Alexander

Liquefied Natural Gas Fuel tank


Lng background

LNG Background

  • What is LNG?

    • Liquefied Natural Gas

    • -162° C

    • 1/600 volume of Natural Gas

  • Why use it?

    • Cost

    • Availability

    • Efficiency

    • Environment


Project statement

Project Statement

  • To design and analyze a Liquid Natural Gas (LNG) fuel tank for Liebherr’s current T 264 mining truck that conforms to all Pressure Vessel and LNG regulations and fits in the space available on the mining vehicle.


Project goals

Project Goals

  • Design LNG Tank to fit Liebherr’s current T 264 Mining Truck

  • Maximize Volume for 8-12 hour operational time (35% work load)

  • Strictly follow pressure vessel and LNG standard regulations

  • Perform a Finite Elemental Analysis of the tank using SolidWorks


Tank design parameters

Tank Design Parameters

  • Space Available

  • Assumptions

    • Load factor of 35%

    • LNG engine efficiency equivalent to Diesel

    • ASTM Boiler and Pressure Vessel Code

    • Same tank design will be used for both tanks


Inner tank

Inner Tank

  • A240 Type 304 Stainless Steel

  • Total volume: 1800 L

  • Thickness: 1.75 inches

  • 2 parts (Shielded Metal Arc Welding Method)


Liquefied natural gas fuel tank

  • Ullage Tank

    • Volume: 180 L

    • Increases hold time

    • Pump less fuel method

    • Full tank gauge

  • Rivets

    • Diameter: 2.5 inches

    • Length: 3 inches

    • Vertical and horizontal support


Insulation layer

Insulation Layer

  • Multi Layer Insulator (MLI)

  • 1 inch thickness

  • Low thermal conductivity

    • K= 0.0001 W/m-k

  • High thermal resistance

    • R=1440 m^2K/W


Outer shell

Outer Shell

  • A240 Type 304 Stainless Steel

  • Made of 2 parts

    • Shielded Metal Arc Welding Method

  • Allows vacuum

  • Placement for rivets at the bottom


Manifold

Manifold


Lng fuel tank

LNG fuel tank


Gauges

Gauges

  • Three Companies: Omega, Ashcroft, and WIKA

  • Two Gauges:

    • Fuel

      • Standard Size: ~ 2”

    • Pressure

      • Maximum tank pressure: 420 psi

      • Average Size: 1 – 2 ½”

    • Properties:

      • High pressure

      • High shock resistant

      • Cryogenic temperatures (304 SS)


Fueling methods

Standard Diameter: 1 ½ “

Time efficient

Prevention of temperature and pressure changes

Function at cryogenic temperatures and atmospheric pressure

50 Gallons Per Minute

Material: Stainless Steel

The majority of companies are developing similar fueling methods

Quick disconnect and fueling

Parker, CryoMac, Carter, etc.

50 gallons per minute

Stainless steel

Fueling Methods


Three major components

Three Major Components

  • Vent

    • Removing warmer gas

    • Sub-cooling LNG residual

    • Decrease in pressure

    • LNG facilities may have a vent connection

  • Liquid

    • For defueling tank (emergency situations)

  • Relief Valves

    • Reduces pressure

    • Safety feature


Rules regulations

Rules & Regulations

  • NFPA 57 – Liquefied Natural Gas Vehicular Fuel Systems Code

    • Design, installation, operation, and maintenance of LNG engine fuel systems on vehicles of all types

  • SAE J2343 – Recommended Practice for LNG Medium and Heavy-Duty Powered Vehicles

    • Guidance for construction, operation, and maintenance of LNG heavy-duty vehicles for public transit and commercial applications


Safety features

Safety Features

  • Ullage Tank

  • Pressure Relief Valves

    • 350 psi

    • 400 psi

  • Emergency Shutoff Valves

  • Defueling connection


Finite element analysis

Finite Element Analysis

  • Weight Analysis (4000 lbs)

    • Yielding stress 207 MPa (304 SS)

    • Max stress from FEA 22 MPa


Finite elemant analysis

Finite Elemant Analysis

  • Pressure (420 psi)

    • Yielding stress 207 MPa (304 SS)

    • Max stress from FEA 190 MPa


Goals 2

Goals (2)

  • Design a single LNG Tank to fit Liebherr’s current T 264 Mining Truck

    Designed a tank that fits and has an approximate volume of 1800 L

  • Maximize Volume for 8-12 hour operational time (35% work load)

    Total of 3500 L = 11-12 hour of operation time

  • Strictly follow pressure vessel and LNG standard regulations

    NFPA 57 SAE J2343

  • Perform a Finite Elemental Analysis of the tank using SolidWorks

    Max stress < yielding stress for 304 stainless steel (207 Mpa)


Questions

QUESTIONS?


  • Login