Chapter 1 - Introduction

exa 1.1 Pg 13

In [1]:
from __future__ import division
Nmax=1000## rpm
Nmin=30## rpm
z=9## no. of steps

#Rn=Nmax/Nmin=fi**(z-1)
fi=(Nmax/Nmin)**(1/(z-1))## common ratio

print 'The speeds of gear box are:'
N1=Nmin## rpm
for i in range(1,z+1):
    print '\n\t\t\tN%d = %.1f rpm'%(i,N1)
    N1=fi*N1##rpm

The speeds of gear box are:

			N1 = 30.0 rpm

			N2 = 46.5 rpm

			N3 = 72.1 rpm

			N4 = 111.7 rpm

			N5 = 173.2 rpm

			N6 = 268.5 rpm

			N7 = 416.2 rpm

			N8 = 645.1 rpm

			N9 = 1000.0 rpm

exa 1.2 Pg 14

In [2]:
from __future__ import division
Pmax=100## kW
Pmin=10## kW
z=5## no. of models

#Rn=Pmax/Pmin=fi**(z-1)
fi=(Pmax/Pmin)**(1/(z-1))## common ratio

print 'The power of generating sets are:'
P1=Pmin## kW
for i in range(1,z+1):
    print '\n\t\t\tP%d = %.1f kW'%(i,P1)
    P1=fi*P1##kW


print '\nExpanding for 10 models.'
z=10## no. of models

fi=(Pmax/Pmin)**(1/(z-1))## common ratio

print '\nThe power of generating sets are:'
P1=Pmin## kW
for i in range(1,z+1):
    print '\n\t\t\tP%d = %.1f kW'%(i,P1)
    P1=fi*P1##kW

The power of generating sets are:

			P1 = 10.0 kW

			P2 = 17.8 kW

			P3 = 31.6 kW

			P4 = 56.2 kW

			P5 = 100.0 kW

Expanding for 10 models.

The power of generating sets are:

			P1 = 10.0 kW

			P2 = 12.9 kW

			P3 = 16.7 kW

			P4 = 21.5 kW

			P5 = 27.8 kW

			P6 = 35.9 kW

			P7 = 46.4 kW

			P8 = 59.9 kW

			P9 = 77.4 kW

			P10 = 100.0 kW

exa 1.4 Pg 15

In [3]:
from __future__ import division
Pmax=50## kW
Pmin=5## kW
z=4## no. of models

#Rn=Pmax/Pmin=fi**(z-1)
fi=(Pmax/Pmin)**(1/(z-1))## common ratio

print 'The models are:'

for i in range(0,z):
    P1=fi**(i)*Pmin## kW
    print '\n\t\t\tP%d = %.1f kW'%(i,P1)


print '\n for 8 models.'

z=8## no. of models

#Rn=Pmax/Pmin=fi**(z-1)
fi=(Pmax/Pmin)**(1/(z-1))## common ratio

print 'The models are:'

for i in range(0,z):
    P1=fi**(i)*Pmin## kW
    print '\n\t\t\tP%d = %.1f kW'%(i,P1)

The models are:

			P0 = 5.0 kW

			P1 = 10.8 kW

			P2 = 23.2 kW

			P3 = 50.0 kW

 for 8 models.
The models are:

			P0 = 5.0 kW

			P1 = 6.9 kW

			P2 = 9.7 kW

			P3 = 13.4 kW

			P4 = 18.6 kW

			P5 = 25.9 kW

			P6 = 36.0 kW

			P7 = 50.0 kW

exa 1.6 Pg 15

In [4]:
from __future__ import division
Pmax=75## kW
Pmin=7.5## kW
z=5## no. of models

#Rn=Pmax/Pmin=fi**(z-1)
fi=(Pmax/Pmin)**(1/(z-1))## common ratio

print 'The models are:'

for i in range(0,z):
    P1=fi**(i)*Pmin## kW
    print '\n\t\t\tP%d = %.1f kW'%(i,P1)

The models are:

			P0 = 7.5 kW

			P1 = 13.3 kW

			P2 = 23.7 kW

			P3 = 42.2 kW

			P4 = 75.0 kW