How Much Capacity of Diesel Genset is suitable for
20 no.s of 1.5ton AC's & Why?(Load Calculation)
Answers were Sorted based on User's Feedback
Answer / vivek sri
A correction to my earlier answer(8)
In case we are to use a 3 phase generator then the total
current of 218.75 has to be equally shared between the 3
phases i.e. Iph=218.75/3=72.9 Amps.
So the genset rating would be again 52.5kVA(1.732*415*72.9).
But in actual as the number of AC's is 20;
18 Ac's get distributed equally (6 on each phase L-N) and
the balance 2 nos will be on one phase each.
So the max current will be 76.58 (18/3*10.94+10.94).
So the 3 phase genset rating would be 55kVA (1.732*415*76.58)
Is This Answer Correct ? | 10 Yes | 2 No |
Answer / avnish sharma
I do agree with Mr. Prakash. but he has not considered pf, safety margin, and Future accommodation.
Is This Answer Correct ? | 9 Yes | 3 No |
Answer / girijapati mishra
TOTAL REF LOAD =1.5X20 =30 TR
1 TR = 3.5 KW
Thus , 30 TR = 105 KW
COP (i.e ratio of heat removed vs power input ) for AC
varies from 2.5 to 3 depending on design and other
considerations.
Assuming a COP 2.5 ( lower side)
Power required will be 42 kw (=105/2.5).
Considering power factor 0.8 ( gen assumption for all
caculations) rating of the DG set will be 52.5kva ( =42/0.8)
. A DG set higher than this calculated value to to selected
for this requirement.
Is This Answer Correct ? | 7 Yes | 2 No |
Answer / sathish reddy
45 KVA Diesel Genset is requied. Calculation is as follows,
20 * 1.5 = 30
Multiply by the MF 1.4
i.e. 30*1.4 = 42 KVA
As after 40 KVA we have 45 KVA as next higher capacity we
have to go by 45 KVA.
Is This Answer Correct ? | 25 Yes | 22 No |
Answer / lokesh thota
Actually a 1.5tonn a/c will take 15amp at its maximum level
on 220v supply.so,for 20 such ac's you will need around 300
amps from that you can calculate how much Kva d.g u r need
with according to the vol you r selecting
Is This Answer Correct ? | 6 Yes | 3 No |
Answer / jenifer
"Genset Engineering Calc" Version 1.1 is well designed than 1.0
Is This Answer Correct ? | 0 Yes | 0 No |
Answer / prakash suhane
Total Load in T.R = 20X1.5 =30 T.R
1 T.R = 3.5 kw
for 30 T.R 30 X 3.5 = 105 K.w
any D.G set available more then 105 KVA is suitable for
this application.
Is This Answer Correct ? | 16 Yes | 17 No |
Answer / jagjeet
Dear vIVEK,
Avinash has given correct answer , Generally pf of the
Dg Set is 0.8 and for calculation we are taking 20 %
Pf of Dg set is ==0.8
Safety Marging = 20 %
Future Expansion =20%
so 1.4*105/0.8=183KVA so you will have to go for 180 KVA
DG Set.
Is This Answer Correct ? | 5 Yes | 7 No |
Answer / genset
"Genset Engineering Calc" (with Electrical & Engine
calculators) - iPhone + iPad + iPod App -
1. Can do more than 40 types of electrical & engine
calculations.
2. Calculation Formulas
3. Save & load calculations
4. Share the calculations via mail & SMS
5. & more ….
App download link -
http://itunes.apple.com/en/app/genset-engineering-calc/id551386320
If you like the app pls like it at -
http://www.facebook.com/pages/Genset-Engineering-Calc/267890853325587
Is This Answer Correct ? | 0 Yes | 2 No |
Dear vivak
first , we see.what is EER of used ac system , if ac EER
is 8. ac load less 20% .
then
1.5 ton= 18000 btu = 5.250kw
20 nos. acs load =20*5.250KW
= 105 KW
DG pf is 0.8 and DG safty margine is 20%.
than 105*1.4=147KVA
we use 150kva DG and more .
Is This Answer Correct ? | 2 Yes | 5 No |
how the ac voltage are selected like 220v,415v,750v,1000v& 1.KV,6.6KV,11KV,33KV,66KV,132KV,220KV & why these are selected like these orders
why do we not use equivalent voltage source in negative sequence equivalent ckt.
if 11 lead acid batteries each 200 amph are connected in series so that combinly they can produce 110 volts dc. question is how much backup it can provide ? 2) how can we calculate that how much amprere and voltage is required to charge them . thanks in advance !
what is the aircraft voltage and frequency standard ?
what will be project cost for 100 kv transformer connection under oyt scheme.
why transformer fuse wire is very thin as compared to home fuse wire while voltage lavel is low
In three phase, phase to phase voltage is 440 Volts, but the three phase motors are designed for 415 Volt, 50 hz, why
1 Answers Shree Ram, Shriram, Sri Ram,
what is diff b/w electrical & electronics ?
why and where we use early make & late break contacts in protection?
what is difference between neutral& grounding?
if the stetor speed (N S) increase by 20% then the rotor speed will be increased by 20% is it true. ?
What is pole of the system?