Humidification & Dehumidification Video Lecture | Mass Transfer - Chemical Engineering

My dear in this total I am going to
discuss about humidification and T
modification if you are from India then
probably you are feeling this that there
is too much humidification I mean
humidity in the air that's why we people
he was really sweating all right so
don't worry about that I am going to
make you understand each and everything
about these two topics all right so
again in this topic in this topic I am
going to get help from psycrow PS 1 CH
psychometric chart I am going to help I
am going to get help from this one
because this is this chart is going to
make me understand about this thing all
right so let's move to the chart so
basically what is the modification I
mean here a quantity of air will be
increase okay
and you quality of water in the air will
be negative in vacation quantity of
water or more share what a vapor Animus
say will be decreased
alright so these two process we usually
use which will we have in case of
refrigerating system alright
so because it's all about these two
things are also most important in case
of you if we will consider human
comfortness okay so basically what I'm
going to do I'm going to draw a simple
psychometric chart which which is most
common alright so this must be straight
this Omega is known as specific humidity
and this is known as dry bulb
temperature DVT
all right material so let us move to the
topic so basically what will happen if
there is a condition one and
the condition new so if if there is a
there is going on there is going on a
modification hammoudi vacation if there
is going on here modification then what
we have to do we have to increase its
specific hammer attain this is all about
communication now if we you are
considering if we are considering about
other process humidification means we
are going to increase its specific
humidity now if we are thinking about
dehumidification diem unification then
what we have to do we have again I am
going to draw a diagram for this because
this is really important so this one is
one this point is two if there is
degrees in specific humidity all right
but driver temperature will be constant
if there is degrees in specific humidity
that is known as dehumidification and
this is known as specific and specific
humidity denoted by Omega and specific
humid equal to M V upon M a mass of
water vapour present mass of mass
version in the water vapour masata dryer
is equal to 0.62 2 T V upon P minus PV
this is one of the most important
formula if you were preparing for any
complete examination just like kid or
maybe j SS CJ or any other competing
combination well these dual German is
our most important in India that's why I
am sharing with you I am from India
all right so I hope you understand these
two concepts now what I am going to
share with you this is amazing what will
happen if we will do humidification in
this system what will happen to enthalpy
what will happen to I would happen to WB
t what will happen to specific element
what is relative humidity will talk on
this okay so basically what what is
happening here what is happening here
driver
temperature is constant specific
humidity is increasing if driver of
temperature is constant temperature
constant specific humidity is increasing
that means dew point temperature dew
point temperature will also increase
relativity will increase as well as
enthalpy also increase then specific
volume also in these and then WBT also
into use so in case of immigration
process we can easily understand these
by using psychometric chart that what is
going on exactly
if we will do humidification
in the system alright so what will
happen in case of D modification in case
of D modification we are decrease in
specific humility we have constant WBT
now what will happen when not wants to
w8 its DVT would be constant WB t will
decrease specific volume will decrease
and then P will decrease relativity will
be pleased as well as DP t will also
behaves now how do you notice my dear
one thing that is important if you can
remember one side what is going on I
mean what is the effect of M unification
in these parameters then you can easily
member this one the most important thing
is that you have to remember at least
one well I hope you understand the
concept what I wanted to make you
understand thanks for watching hope to
see you again in my next video bye