Hi everyone welcome back to be.
The solar energy course is a lost section in this section we are going to get that b v saving the definition
of the BP sizing.
It is a way use to get the exact rating of each component of Beavis system corresponding to a given
loop such as battery inverter charger controller and number of banners.
In this section we are going to introduce you to three methods of B2B sizing beefy sizing can be by
using Excel sheet as we are going to describe in the next lecture or by using a manual calculation as
we are going to do in this lecture.
All by using that B source software program which we are going to introduce is a lost lecture in this
course in this lecture we are going to introduce you to the many one calculation of VB size.
So let's start
to understand the strategy of beefy sizing.
You need to understand this figure the beefy array gives the energy to charge the controller which is
used to charge the battery which supplies the battery inverter by some power this inverter is going
to supply the main service panel which is going to supply is ACLU this mean they see Lord is going to
define you think of inverters.
And if they input power tools inverter is going to the implying that size of the battery and charger
controller is going to be defined by the battery and the Peavey array.
The beefy array is going to be defined by charger.
Controller efficiency and power
so we are going to say is this all a great system from right to left not from left to right.
So let's start Suppose we had and it would consist of five lumps of thirty Watt operate four to our
three days and we have refrigerator of five hundred what operate four five hours per day.
And three different things of four to five for what operate for it.
Per days and wash your machine of fifteen hundred.
What operates four point eight six hour per day and TV of 200.
What operate four four hour per day and toaster operates for fifteen hundred watt for all point to five
our birthdays first we are going to guess that total both of these to lose to the power of loose will
equal to five times to Team What for is the lump and the five hundred what for refrigerator and forty
five what times three four is that fan and fifteen hundred ward for washing machine and two hundred
watt for Z TV and fifteen hundred watt for the toaster.
This will equal to thirty nine hundred and eighty five watt so that total load both were equal to three
hundred and ninety eight five Walt but the what is the total energy of Z2 by multiplying each power
by each time is it operating.
For we will get that total energy Lou so five times thirty times two hour plus five hundred times five
hour forty five times three times eight hour fifteen hundred times or point eight six hour two hundred
times four hour fifteen hundred times all point to five hour will equal to six thousand and thirty four
five what.
So that total new energy will equal to six thousand three hundred and forty five watts then thirty two
adjusted factor inverters will equal to all point eight five as the input voltage for Zain Verjee there
will be 24 DC voltage from the battery and output voltage would equal to two hundred and twenty volt
AC each inverter is rated with 1000 what
so they inverter input power would equal to their new AC power over the adjusted effective mean the
input inverse of power with equal to three thousand nine hundred and eighty five fourth over O point
eight five.
Well it was two four cells in six hundred and eighty eight walls the DC energy or is the input in the
energy of the inverter What do you what do is it easy lose energy birthdate over the adjusted factor
mean six thousand three hundred forty five for our beer all body in a five when equal to seven thousand
four hundred sixty three What the oh so then a versus system in football it should be four thousand
sixty eighty eight what how many inverter we are going to use in this system by dividing this power
over 1000 what sold is the number of inverter one equal to four thousand six hundred eighty eight What.
Over 1000 What will you give us five inverters
now we are going to give us the size of the battery let's stay there so this is charge of the battery
eighty per cent the battery plus voltage will equal to 24 volt each battery gives twelve full.
We need the battery two supplies the loot for seven days miss out on each battery has four hundred and
seventy eight and there our
first they taught an MBA out there today with equal to easy energy.
Thursday means the input inverter energy seven thousand four hundred sixty three well thought over Z
battery boss voltage which a 2 to any 4 Volt will give us.
Three hundred and eleven and bear out each day.
We will need from battery three hundred and eleven.
And there are seven.
Where the battery capacity will equal to total and we bear our wish.
Three hundred and eleven and beat out times the number of days which is seven overs edifice of this
charge of each battery which all point it will be equal to two thousand seven hundred twenty one and
build our so we can get Z no battery in burial by dividing this number of better and better out of each
battery will give us two thousand seven hundred and twenty one and better out over four hundred seventy
eight and build our will give us six batteries.
So we are going to use six batteries in better to get the number of the battery in serious by dividing
that battery possible voltage over the selected battery voltage which is twelve volt so twenty four
over twelve.
We will get two batteries in serious so we will use twelve batteries two in series and six in Barrow.
Now let's see size that b v every
device round trimming efficiency would equal to all point it five means when we are going to s lies
the loot we will need more power rooms that the V at a rate to charge Z Bethany let's say this efficiency
will equal to or point it five so as required every output per day will equal to that total the DC energy
bill day better battery of ground trip efficiency will give us eight thousand seven hundred and eighty
Watt our means we will need from the DV array eight thousand and seven hundred and eighty what oh less
we are going to use their Siemens banner Model M fifty five which has maximum power equal to fifty three
Watt and maximum power point current three point or five ambient and maximum power point voltage seventeen
point four Volt and the choice circuit can't equal to three point two seven ambient as the open circuit
voltage.
This is the role of trunk will equal to twenty one point eight for this is that a mention of the panel
as in their physical war then seated or nominal breathing something greater with equal to 47 degrees
Celsius Z a radiance is one thousand watt bed meter squared them in compression with equal to twenty
five degrees Les's.
This is the Ivy curve of Zach Benton at different temperature and that rabbit this is thought because
that Peavy Bannon will not operate at this thunder temperature condition or if DC so there will be some
losses their losses and then fold dish with equal to all point eighty five as close losses at BOA would
be equal to all but mine is a go to that graph or the temperature increases the voltage with go is going
to decrease and the power is going also to decrease but their current is going to increase so the maximum
bar in voltage will equal to seventeen point four times all point eight five will equal to fourteen
point seventy nine volt but Z.
Maximum power point power would equal to maximum power point part of Z panel finds open opening night
means fifty three times all point nine will equal to forty seven point seven what the energy of each
module will equal to that of the bow of each module.
Time says on our mean forty seven by seven times three point eight will equal to one hundred and eighty
one point three what will needed from each be the
the degradation factor of each module according to operating temperature for all climate will equal
to 90 percent men each module energy output and operating temperature will equal to one hundred sixty
three.
What our.
Now we can get the number of modules by dividing the total amount of power is from this entry over Z.
Boehner can be get from each.
Banner.
Mean equal to eight thousand seven hundred eighty while our divided by one hundred sixty three what
our will give us fifty four modules mean we are going to use fifty for module in this array.
Those fifty four modules is going to be divided in series and parallel each parallel branch is called
a string each just drink has number of serious banner or modules the number of serious modules can be
divined by the whole flush mean the bus voltage divided by maximum power by the voltage mean twenty
four divided by fourteen point seventy nine all will be equal to two modules
the next thing ze number of Z burn strings if we are going to use fifty four modules and two modules
in series mean we are going to use fifty for over two modules in better mean twenty seven modules and
better means the number of strings will be equal to twenty seven modules what what is that sizing of
that solar chargers
that kind of solar charger can be defined by the number of strength in bad times that short circuit
got out of modules time safety factor the safety factor always equal to one point five to one point
six let's take for this example one point fifty six
so there's a number of strings in parallel with equal to any Seven times three point to any seven times
one point fifty six will equal to one hundred seventy seven point seven and there means we are going
to use is sorter it charger controller with current equal to one hundred and forty ambient
that charge a voltage is defined by then DC bus Voltage Now you already get a reading of each component
of TV system by manual calculation so in the next lecture I'm going to give you an excel sheet 2 is
going to help you to get the reading of each component of b v system without going through all this
manual calculation so see you in the next lecture.