The purpose of this study is to analyze the effect of ratio composition and particle size on pelletization of various feedstocks. The feedstock materials were used leaves, wood, junk waste, shells of coconut and combination of any kind of pure feedstock materials with composition ratio 75:25, 50:50 and 25:75. The feedstocks with highest calorific value crushed and filtered using variation of mesh (20,40,60,80,100 and 120mesh) before pressing in mold dies diameter 6.5mm using multiple pellet press at 70kg/cm 2 . The results showed that combination with wood results higher calorific value of feedstock, and larger particle size impact lower durability and lower density.
This research background by issues imbalance mastery of concept, practice, and student's activity in psychometric subject. Therefore, teacher sought using edutainment methods to occurred learning atmosphere interesting and fun. The aims of this research is knowing both the increasing of learning outcomes and students activity after using edutainment methods in psychrometric learning. The method in this research is classroom action research that consisting of three cycles (action, observation, and reflection). The data collected by using pretest, posttest, and observation. The results show an increasing of students learning outcomes that shown by an average value in first cycle till third cycle, with increased of N-Gain from first cycle till third cycle. Implementation of edutainment method in learning activity, also increase of students activity in each cycles. In conclusion, by using edutainment method in learning activity, it is can increase the learning outcome and students activity in system and installation of air conditioning subject at psychrometric learning.
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