Calculate the A/F ratio for data sets 1-20 using the average of oxygen and carbon balance method. (use sheet named “Sensor Data” and use average value for each set. You should have 20 numbers for A/F)

Solution

For Data set 1

Write down the standard atomic weight for each atom

Carbon= 12.011 amu

Oxygen=15.999 amu

Calculate mass of fuel which is 1 Mol of carbon made up from 2 atom of oxygen

Note from the remaining data set mass of fuel is same for all; just calculate mass of air

Calculate the mass of oxygen, which consists of 2 moles,

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 21% oxygen.

 

For data set 2;

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 4.80% oxygen.

For data set 3

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 4.64% oxygen.

For data set 4

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 4.35% oxygen.

For data set 5

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 4.09% oxygen.

For data set 6

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 3.59% oxygen.

For data set 7

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 2.53% oxygen.

For data set 8

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 3.21% oxygen.

For data set 9

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 2.63% oxygen.

For data set 10

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 2.21% oxygen.

For data set 11

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 1.90% oxygen.

For data set 12

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 2.10% oxygen.

For data set 13

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 1.68% oxygen.

For data set 14

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 1.50% oxygen.

For data set 15

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 1.19% oxygen.

For data set 16

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 1.01 oxygen.

For data set 17

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 7.72 oxygen.

For data set 18

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 7.03 oxygen.

For data set 19

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 6.08 oxygen.

For data set 20

Calculate the necessary mass of air which contains the calculated mass of oxygen, taking into account that air contains around 6.08 oxygen.

Problem 2

Calculate the brake power output for the 20 sets.

(use sheet named “Sensor Data” and use average value for each set. You should have 20 numbers for brake power)

Solution

Plot brake power obtained in problem 2 above vs the A/F ratio.

 

Problem 4

Plot the Pressure-Volume diagrams for 3 cases (and label axes and provide annotations):

a)            The set corresponding to the highest A/F ratio you calculated

The highest A/F ratio is in Data set 16 =71.98

b)            The set corresponding to the lowest A/F ratio you calculated

The lowest A/F ratio is in Data set 20 = 9.21

c)      The set close to the average of  A/F ratio you calculated

The close average A/F ratio (26.93) is in Data set 9 = 27.64

	Selected for three cases
	Pressure	Volume
Set 9	86.57	9.42E-05
Set 16	103.39	0.000107
set 20	76.66	0.000117

 

PV diagram