Comparison study of efficiency and property of fuel briquette by electrical machine by motor and hand machine using bicycle

Comparison study of efficiency and property of charcoal briquette by using electrical motor machine and bicycle machine was done. The size of electrical motor was 3.5 horsepower and wooden charcoal is grinded crushing machinery was used. The components were grinded charcoal 2,000 g: tapioca flour 500 g (ratio 4:1) and water. They were brought to grind by crushing machinery by using electrical motor and bicycle machine. The times were recorded and brought the charcoal to dry in the sun to get rid of moist. The heat energy was tested by using machine Cal 2k e2k (Bomb Calorimeter) and found mechanical properties of physics which was density of charcoal by calculating from ratio between mass of charcoal briquette per capacity of charcoal briquette. Moreover, the time of lighting fire was found and time of burning was also found by lighting and recorded time until charcoal was burnt. The result of research was found that working efficiency of charcoal briquette by using electrical motor machine took time for grinding average 4.29 minutes and using bicycle machine took time for grinding average 4.50 minutes. The time of grinding was different 4.79%. The value of heat of using electrical motor machine and using bicycle machine was 22.68 MJ/kg and 23.34 MJ/kg respectively. The value of heat was different 2.87%. The values of density were 907.43 kg/m3 and 838.57 kg/m3 respectively. The values of density were different 7.89%. Moreover, the times of lighting were average 6 minutes and 4.33 minutes respectively. The times of lighting were different 32.33%. The times of burning were average 5.17 hours and 4.24 hours respectively. The times of burning were different 19.76%