Cloud Point and Pour Point Test

 

Cloud Point and Pourr Po Pou Poin intt Tes Testt

 

Cloud Point of Liquid Fuel 







Is the temperature at which oil becomes cloudy or hazy when oil is cooled at specified rate. This haziness may be due to formation/precipitation formation/prec ipitation of waxes or increase in viscosity viscosi ty at low temperature Due to oil formation/precipitation formation/precip of waxes, viscosity of fuel increases anditation its fluidity decreases. The presence of solidified waxes thickens the oil and clogs fuel filters and injectors of engines, which affect its performance.

 

Pour Point of Liquid Fuel 

Is the lowest temperature before the oil becomes semi-solid and loses its flow characteristics.



It is a measure of fluidity, the lowest temperature at which a sample is still able to flow.



It is measured by adding 3ºC to the temperature at which the liquid fuel “gelled.”

 

Note: 

a) Usually the difference between cloud point and pour point is 4-6ºF.



b) Values for cloud and pour point, can be altered/improved/lowered by the use of “additives.”

 

Determination of Cloud and Pour Point 





First, cool the oil to be tested to a temperature at least above the approximate cloud point. Then sample is cooled at a specified rate, such as intervals of 1ºC, and examine the oil’s flow characteristic. The lowes t tem temperat peratur ure e where wher e oil oi l

become becom es cl clou oud dy is i s r ecor corde ded d as as C L OUD POINT and the lowes t tem temper pera atur ture e before the before the oil be becc om ome es s emi -s ol olii d is record re corde ed as as it itss P OUR P OINT OINT..

 

Significance of Cloud/Pour Point 

CLOUD and POU POUR R POIN POINT T S tell us the suitability of lubricating oil in cold conditions.



CLOUD and POU POUR R POIN POINT T S are related to low temperature characteristics of fuel and tells the behaviour of fuel at low temperatures.

 

End of discussion…. 

Group 5 : Cloud Point and Pour Point Tests



Presented by:



Condeno, Rod Aron





Sevilla, Michael Angelo Muro, Joshua Canoy



Gaspar, John Hennessy

 

QUIZ



What is pour pour point? point? (5 (5 pts )



What is cloud point? (5 pts)

ESSAY 

What is the difference of cloud point and pour point?