DISCUSSION

 

From the data, five graphs have been plotted, which is the graph of engine torque, steam flow rate, engine inlet pressure, boiler pressure and specific steam consumption verses engine brake power. By referring to the first graph, it shows that the relation between engine torque and engine break power is proportional with each other. When force applied increase, the value of engine torque produced increase. As a result of increasing in engine torque produced, the values of engine break power also increase.

            According to the second graph, it shows that the graph between steam flow rate and engine break power is not linear. This is because the value of steam flow rate drop from 9 kg/h to 8.4 kg/h when the engine brake power reach 35.1858 kW.

From the third graph, we can see that the engine inlet pressure increase when engine break power increase. It shows that the engine inlet pressure and the engine break power are linear to each other. Although the value of engine inlet pressure increase not too much, but the steam engine still produce bigger brake power.

By referring to the fourth graph, it shows that the boiler pressure and the engine break power are not proportional to each other. We can see that the value of boiler pressure from first to third reading are linear but the fourth reading is constant with third reading and the fifth reading the value is drop.   

The last graph shows that the graph drop means that the value of specific steam consumption is decrease when the values of engine break power increase. This is because the value of specific steam consumption relates to steam flow rate (steam consumption rate) and engine break power.

 However, all the readings that obtained may not accurate because the efficiency of machine, low skills, room temperature and others. All this reasons could give effect on the readings. Besides that, error also occurs because the motor speed cannot be maintained constant.