Principles of measurement
This presentation is the property of its rightful owner.
Sponsored Links
1 / 25

Principles of Measurement PowerPoint PPT Presentation


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

LESSON 1. Principles of Measurement. Let the Games Begin!. Objectives. Measurement of temperature and pressure Units of measurement Measurement devices. References. Introduction to Naval Engineering Principles of Naval Engineering. Purpose of Measuring Devices.

Download Presentation

Principles of Measurement

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


Principles of measurement

LESSON 1

Principles of Measurement

Let the Games Begin!


Objectives

Objectives

  • Measurement of temperature and pressure

  • Units of measurement

  • Measurement devices


References

References

  • Introduction to Naval Engineering

  • Principles of Naval Engineering


Purpose of measuring devices

Purpose of Measuring Devices

  • Why essential to proper operation of propulsion plants?


What is temperature

WHAT IS TEMPERATURE?

  • An indication of the internal energy contained in a substance

    • Mono-Atomic Gases: Linearly proportional

    • Poly-Atomic Gases: translational, rotational and vibrational kinetic energy.

  • Temp is a measure of but not directly proportional to internal kinetic energy.


Measurement of temperature

Measurement of Temperature

  • Relative Scales

    • Fahrenheit (°F)

    • Celsius (°C)

  • Absolute Scales

    • Rankine (°R)

    • Kelvin (K)


Temperature relationships

Temperature Relationships

(°F) = 9/5*(°C) +32

(°C) = 5/9*[(°F) –32]

(°F) = (°R) – 459.67

(°C) = (K) – 273.15


Measurement of pressure

Measurement of Pressure

  • Definition: Force per unit area

  • Units of measurement

    • Pounds force per square inch (psi)

    • Inches Hg or inches H2O (“Hg)

    • Atmospheres (atm)


Pressure relationships

Pressure Relationships

  • Gage pressure (PSIG)

  • Absolute pressure (PSIA)

  • Vacuum pressure (PSIV) or (in Hg)

  • Atmospheric pressure (14.7 psi)


Pressure relationships1

Pressure Relationships

Absolute Pressure = Atmospheric Press. + Gage Press.

Vacuum = Atmospheric Pressure - Absolute Pressure


Pressure relationships2

Pressure Relationships

30 PSIA

15.3 PSIG

GAGE

PRESSURE

(PSIG)

ABSOLUTE

PRESSURE

(PSIA)

Atmospheric Pressure

14.7 PSIA

0 PSIG

(Average at Sea Level)

0 In. Hg

VACUUM

(in. Hg)

0 PSIA

29.92 In. Hg


Principle of operation temperature devices

Principle of OperationTemperature Devices

  • Expansion Thermometers

    • Liquid in glass

    • Bimetallic

    • Filled system/distant reading

  • Pyrometers

    • Thermocouple

    • Resistance

    • Radiation and optical pyrometers


Expansion thermometer

Expansion Thermometer

  • Liquid in Glass

  • Bimetallic

  • Filled System/Distant Reading


Expansion thermometer1

Expansion Thermometer

  • Liquid in Glass

  • Bimetallic

  • Filled System/Distant Reading


Expansion thermometer2

Expansion Thermometer

  • Liquid in Glass

  • Bimetallic

  • Filled System/Distant Reading


Expansion thermometer3

Expansion Thermometer

  • Liquid in Glass

  • Bimetallic

  • Filled System/Distant Reading


Pyrometers

Pyrometers

  • Thermocouple

  • Resistance

  • Radiation and Optical


Pyrometers1

Pyrometers

  • Thermocouple

  • Resistance

  • Radiation and Optical


Pyrometers2

Pyrometers

  • Thermocouple

  • Resistance

  • Radiation and Optical


Pyrometers3

Pyrometers

  • Thermocouple

  • Resistance

  • Radiation and Optical


Operation of pressure measuring devices

Operation of Pressure Measuring Devices

  • Manometers

  • Bourdon tube

  • Bellows gage


Operation of pressure measuring devices1

Operation of Pressure Measuring Devices

  • Manometers

  • Bourdon tube

  • Bellows gage


Operation of pressure measuring devices2

Operation of Pressure Measuring Devices

  • Manometers

  • Bourdon tube

  • Bellows gage


Operation of pressure measuring devices3

Operation of Pressure Measuring Devices

  • Manometers

  • Bourdon tube

  • Bellows gage


Principles of measurement

Questions?


  • Login