Undergraduate thesis for the purpose to analyze the efficiency of boiler heat pipe large 250 kg per hour. Test and analysis of thermal efficiency of boiler pipe large 250 kg per hour packing quantity trial diesel supplies to different levels of pressure: 2 bar bar bar bar 3, 3.5 and 2.5 to 4 bar, then taken to calculate the performance tools to find percentage summary of performance. By diesel fuel Experimental results showed that performance, the pressure to find a 4 bar with a percentage efficiency of boilers, is equal to the maximum pressure of 2 bar 74.78 percentage is the percentage efficiency of boilers with the lowest performance values equivalent to 40.25, which varies according to the temperature and pressure values.
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