Atmospheric pressure and gauge pressure - thermodynamics, Mechanical Engineering

Assignment Help:

Atmospheric Pressure (Patm):

It is pressure exerted by atmospheric air on any surface. It can be measured by a barometer. The standard values of it are;

1 Patm = 760 mm of Hg that is column or height of mercury

=   .g.h. = 13.6 × 103  × 9.81 × 760/1000

= 101.325 kN/m2  = 101.325 kPa

= 1.01325 bar

when density of mercury is taken as 13.595 kg/m3  and acceleration because of gravity as 9.8066 m/s2

Gauge Pressure (Pgauge):

It is the pressure of fluid contained in closed vessel. It is always greater than atmospheric pressure. It is measured by an instrument called as pressure gauge (like Bourden's pressure gauge). The gauge measures pressure of fluid (liquid and gas) flowing through pipe or duct, boiler etc. irrespective of atmospheric pressure.

 


Related Discussions:- Atmospheric pressure and gauge pressure - thermodynamics

Computational fluid dynamics package , Cooling of storage tanks: A res...

Cooling of storage tanks: A research involving using a bench top scale wind tunnel to investigate heat losses from storage tanks. A series of small scale model tanks have bee

Illustrate volumetric efficiency of a compressor, Illustrate what is meant ...

Illustrate what is meant by volumetric efficiency of a compressor ? Illustrate how clearance volume affects it. Discuss the effects of clearance volume on the performance of an air

Types of coated electrodes-low hydrogen electrodes, Low Hydrogen Electrodes...

Low Hydrogen Electrodes Low hydrogen electrodes are so called because their covering is low in hydrogen bearing compounds and only traces of hydrogen or moisture are present in t

Construction of lacashire boiler, Construction of Lacashire boiler: C...

Construction of Lacashire boiler: CONSTRUCTION : Consists of boiler shell which contains water and steam. Diameter can vary from 1.75 to 2.75 m and length can be 7.25 - 9 m

#title.cutting tool life, what is relation between tool life and cutting sp...

what is relation between tool life and cutting speed?

Carnot cycle, matlab programme for carnot cycle

matlab programme for carnot cycle

Define the gear hobbing, Define the Gear Hobbing This is the most produ...

Define the Gear Hobbing This is the most productive of all the gear production processes. However, it can only be used for producing spur gears and worn gears. It cannot be use

EM13939497, Do the answers come with the full calculations?

Do the answers come with the full calculations?

Copper and its production, Copper And Its Production Copper is marked ...

Copper And Its Production Copper is marked via a host of good engineering properties. The foremost is copper's good electrical conductivity and bulk of copper is utilized as e

Explain the tool angle, What is Tool Angle? The several angles influenc...

What is Tool Angle? The several angles influence tool performance to a considerable extent & therefore their value should be selected with great care & consideration. a) It

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd