Welcome back, so in the last video I
started to take a stab outdoor deriving the Sun maximum efficiency
for a solar energy conversion in this elevator putting into question that have
been lingering around
sensor several we do. if so a
what I did in lies we going to drive this Soekarno efficiency limit
which to is away in parliament in that may put it
in a box and what it say the
for this ideal Connor kind of a
engine the maximum efficiency for UConn we're doing this
for energy of %uh sunlight which I dunno to in this thread color
into useful phone of work
which had been ordered by this green color is a related
with the temperature of the a man and the temperature other phone
and it was given by this for me a so if I plug in the value of a
a mentor temperature of 43 indicated
and Mpho the Sun to be a a 60 then kato et
this efficiency comes out to be approximately 95 up with it
but I said I was the stated that this
kinda efficiency can they were be achieved a
for a solar energy conversion so why did I make that the statement the
reason I made that the statement is because the to
things we need to correct in this so far man is a if we need to take into account
UConn order we're just gonna we're doing this for solar energy into
useful you so far work so are those other two
corrections the first letter that I stated that the entropy which is
coming %uh due to this energy flux
coming from the Sun is given by a ES
divided by the temperature of the sun in fact this is a
not true for this for energy coming from the Sun with which happens to be in the
phone though the third edition which is given by
planks are is a not yes by
ideas but there's a factor of for by be for the factor %uh for rightly
which is a jean cherie there's this a this intro beef looks by
33 percent as compared to what you would get
if this energy was coming to a medium to let me derived to suffer it's where does
this %uh factor of fun for by
38 come from let me move on this site so more space
fell for the third generation so I know that the fundamental redefinition of
in kobe is a defined by this site definition where this entropy flux
is related to the energy flux by
this definition as I know that duh for the aviation which is that coming up
from a blackbody
that total energy flux that order energy
in that the aviation can be a related to the temperature of the blackbody
and it's probably should do that the
power for the fourth power up the temperature of the blackbody
and disproportionate because that is what we gotta 50 fin boys for dinner
guys did in fact destinations have a guy I 50 fin
boyfriend law that oregon good day could this
to Equation and I can the I can
you know I can take a differentiation with respect to temperature so that they
could a relative
I get DEA take a different
I'll take a day where with respect to temperature so gate of Fort
go get a coffee and a former Air and I'll get
a temperature coefficient again a temperature power
30 so now I can the
I can use that plug that into this
the a question or where so i cant take
I can take my Deen right that the
as the this for Miller and I can upload
know what helps if I do that then I get
I get their relationship to it's really it's my
in kobe flocked to the temperature a as a
given by they suffer with the I have a power of 2 the order
in that were get divided by this temperature
in the gun on NATO air so I get a power of 2 on my integration
and oh this gives me the day read over the respect to
evaporator so I can further I can further integrate this survey the
speculative pressure
and I can now make you though the fact that Inc OPI
does your temperature is the equal to viewers like an integrated this
the order greater from the ok event to
author and every answer and that will essentially give me in this photo
where my in Group B comes out to be
for by 3 for integrated this power of two
I get a third power interpreter and I get a cough sent off following mike d
and this entropy is given by this farming
know I can relate it back to the energy
my know that this site does for energy
is the is related to the temperature by
this equation and I can up like that
back in order so I can defense the plugged-in
back in here and ride this St to power for
divided by DNR this term is nothing but the energy come
associated with doctor %uh radiative flux
to know and I can see that my entropy
is a given by this for me to where it's a
related to the energy %uh coming from the third radiation by
this for me out there are a factor of four for white T
and so it there for makes sense for energy for
the area to a process you know whether you have a radiation
which %uh the traveling without any medium as given by
for by 3 means the energy associated with that radiation
divided by the temperature of the blackbody
safe I contras this so that the entropy for me know that I had to use to a
previously
I see that the intro be associ- ated know is a more
is a is the given by this factor of %uh floor by three
and also this this a energy flux when that
so once it's a radiated from the black bodies the ones that the radiation
happens from the blackbody this and go the flag for Thursday demean the
constant
worse is a in this case where are my age group B is
were getting transferred to a medium this
a there must be a so-so this heat and their thing covered with the
in the temperature constantly very for the temperature is high a ride the so if
in the temperature is the third or at the sink so as the %uh the
as energy more so the so to the same this entropy flag for changes
which is a opposite to the case of this the
a in the case of radiation from the black body where the flux
%uh this and robbie is a is associated when the situation is emitted
and once this summer a.m. ish in no event just radiation propagates through
this tough race pace than the entropy demand so the same
said I you know that the that a good idea dura into the world of
for entropy but lets you know come back to this for
case of solar energy a generated
to know what are interested in doing your hair is that
I've corrected for this say trophy flux I know that it's not a factor of
for but the Associated outweigh that no need to make oh one more a correction
that doe one more correction the
is concerned with the you know the fact that does this
can order %uh this said let me call this other
you know let me associated with a greater oh that death
said that may cause I let DC
said %uh this damn freighter is a you know this template to the finite
database are associated with the said
and the cell itself as I so go %um it out to a radiation States go to a meadow
to
radiation a sense this said you know I can approximate
it to the black body away so that the black body at a temperature of 40°c
and other BS SBA energy associated you to radiation coming out from the said
and the I can do know I do know that I mean by this
vero and I denoted by the same mood
EcoR this energy is associate it does with the
this the radiation coming from the said
and corresponding me with this summer %uh radiation of course there would be a
I
trophy flux associated overhead and I can write that entropy flights
associated with this radiation
a game by this new needed I formula where this is also
like a blackbody radiation so it's going to be related by this energy of the flux
divided by the temperature of the body with a limiting the state is a divided
by the temperature of the said
said oh this is a this gives me the framework for deriving the earth
what is called as airlines booking a bit for energy conversion of the sort I said
and I complete that division in the next over here so see you in the next few