?url_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Adc&rft.title=PENENTUAN+DIFUSIVITAS+TERMAL+BIJI+JAGUNG+CURAH+%0D%0ABERBAGAI+UKURAN+MENGGUNAKAN+METODE+NUMERIK&rft.creator=ANDIKO+ARDIYANTO%2C+1414071009&rft.subject=630+Pertanian+dan+teknologi+yang+berkaitan&rft.description=Pada+kegiatan+pengeringan+dan+penyimpanan+selalu+berkaitan+dengan+pindah+panas.+%0D%0ADifusivitas+panas+merupakan+salah+satu+sifat+fisik+yang+berkaitan+dengan+proses%EF%BF%BDproses+transfer+panas+dalam+bahan+atau+diartikan+sebagai+laju+pada+saat+panas+%0D%0Aterdifusi+keluar+atau+masuk+dalam+bahan+yang+secara+natural+mendistribusikan+%0D%0Apanas+ke+seluruh+bagian+produk.+Difusivitas+panas+merupakan+salah+satu+%0D%0Akarakteristik+panas+yang+dibutuhkan+untuk+menduga+laju+perubahan+suhu+bahan+%0D%0Asehingga+dapat+ditentukan+kebutuhan+energi+atau+waktu+optimal+dalam+proses+%0D%0Apengolahan+terutama+bahan+yang+sensitif+terhadap+panas.+Penelitian+ini+bertujuan+%0D%0Amengukur+nilai+difusivitas+termal+pada+biji+jagung+pipil%2C+biji+jagung+giling+lolos+%0D%0Amesh+6%2C+biji+jagung+giling+lolos+mesh+8%2C+dan+biji+jagung+giling+lolos+mesh+16+(tepung+%0D%0Ajagung)+yang+dialiri+sumber+panas+50+oC+dan+70+oC+dengan+metode+numerik.+%0D%0ABahan+sampel+yang+telah+diketahui+karakteristiknya+(kadar+air+dan+bulk+density)+%0D%0Adimasukan+ke+dalam+silinder+(chamber)+uji+yang+di+dalamnya+terdapat+sensor+suhu+%0D%0ALM35.+Sensor+suhu+LM35+dipasang+pada+9+titik+yaitu+3+di+bagian+bawah%2C+3+di+bagian+%0D%0Atengah%2C+dan+3+di+bagian+atas.+Tinggi+antara+masing-masing+sensor+adalah+4+cm%2C+dan+%0D%0Ajarak+pemasangan+sensor+yang+paling+dekat+hingga+terjauh+adalah+0+cm+(titik+pusat)%2C+%0D%0A3+cm%2C+dan+6+cm.+Sensor+akan+membaca+sebaran+suhu+bahan+saat+silinder+uji+%0D%0Adimasukkan+kedalam+water+bath.+Pungukuran+dihentikan+bila+suhu+bahan+sudah+%0D%0Amendekati+suhu+sumber+panas+(%C2%B13+jam).+Nilai+difusivitas+panas+dihitung+dari+data+%0D%0Asebaran+suhu+menggunakan+metode+numerik.+%0D%0ADari+hasil+perhitungan+didapatkan+nilai+difusivitas+panas+biji+jagung+pipil%2C+biji+%0D%0Ajagung+giling+lolos+mesh+6%2C+biji+jagung+giling+lolos+mesh+8%2C+dan+biji+jagung+giling+%0D%0Alolos+mesh+16+(tepung+jagung)+berturut-turut+adalah+(1%2C35%2C+1%2C38%2C+1%2C69%2C+dan+2%2C30)+x10-%0D%0A7+m2%0D%0A%2Fs+pada+suhu+50+oC+dan+(1%2C39%2C+1%2C42%2C+1%2C72%2C+dan+2%2C36)+x10-7+m2%0D%0A%2Fs+pada+suhu+70+oC.+%0D%0ASemakin+kecil+ukuran+biji+jagung+dan+semakin+besar+sumber+panas+yang+diberikan+%0D%0Amaka+difusivitas+panas+akan+semakin+meningkat.%0D%0AKata+kunci+%3A+Biji+jagung+berbagai+ukuran%2C+Sumber+panas%2C+The+activities+of+drying+and+storage+are+always+related+to+the+transfer+of+heat.+%0D%0AThermal+diffusivity+is+one+of+the+physical+properties+associated+with+heat+transfer+%0D%0Aprocesses+in+materials+and+commonly+interpreted+as+the+rate+of+heat+that+diffuses+%0D%0Anaturally+in+materials+and+distributes+the+heat+to+all+parts+of+the+product.+Thermal+%0D%0Adiffusivity+is+also+one+of+the+characteristics+of+heat+that+needed+to+predict+the+rate+of+%0D%0Achange+in+temperature+of+the+material+so+that+it+can+be+used+to+determine+the+energy+%0D%0Arequirements+or+optimal+time+in+the+processing%2C+especially+materials+that+are+%0D%0Asensitive+to+heat.+This+study+aims+to+determine+thermal+diffusivity+of+shelled+corn+%0D%0Akernels%2C+milled+corn+kernel+(6+mesh)%2C+milled+corn+kernel+(8+mesh)%2C+and+milled+corn+%0D%0Akernel+(16+mesh)+or+(corn+flour)+in+bulk+form+with+heat+sources+of+50+oC+and+70+oC+%0D%0Ausing+numerical+method.%0D%0AThe+samples+were+measured+their+moisture+content+and+bulk+density+and+then+put%0D%0Ainto+the+test+chamber+that+was+already+installed+LM35+temperature+sensors.+The+%0D%0ALM35+temperature+sensors+were+installed+at+9+points+which+were+3+sensors+at+the+%0D%0Abottom%2C+3+sensors+in+the+middle%2C+and+3+sensors+at+the+top.+The+height+between+each+%0D%0Asensor+was+4+cm%2C+and+the+sensors+distance+closest+to+the+farthest+were+0+cm+(center%0D%0Apoint)%2C+3+cm%2C+and+6+cm.+The+sensors+used+to+read+the+temperature+change+in+the+%0D%0Amaterial+during+test.+The+recording+of+temperature+is+ended+when+the+temperature+%0D%0Aof+the+sample+is+close+to+the+temperature+of+the+heat+source+which+is+about+(%C2%B1+3+%0D%0Ahours).+The+value+of+thermal+diffusivity+is+then+calculated+from+the+temperature+%0D%0Adistribution+data+using+numerical+method.%0D%0AThe+results+showed+that+the+values+of+thermal+diffusivity+of+bulk+shelled+corn+%0D%0Akernels%2C+bulk+milled+corn+kernel+(6+mesh)%2C+bulk+milled+corn+kernel+(8+mesh)%2C+and+%0D%0Amilled+corn+kernel+(16+mesh)+or+(corn+flour)+respectively+are+(1%2C35%2C+1%2C38%2C+1%2C69%2C+and+%0D%0A2%2C30)+x+10-7+m2%0D%0A%2Fs+at+50+oC+and+(1%2C39%2C+1%2C42%2C+1%2C72%2C+and+2%2C36)+x+10-7+m2%0D%0A%2Fs+at+70+oC.+The+%0D%0Asmaller+the+size+of+the+corn+kernels+and+the+higher+the+heat+source+was+given%2C+the+%0D%0Ahigher+the+thermal+diffusivity.%0D%0AKeywords%3A+Corn+kernel+of+various+sizes%2C+Heat+sources%2C+Thermal+diffusivity+panas%0D%0A&rft.publisher=FAKULTAS+PERTANIAN&rft.date=2019&rft.type=Skripsi&rft.type=NonPeerReviewed&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F56776%2F1%2FABSTRAK.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F56776%2F3%2FSKRIPSI%2520FULL.pdf&rft.format=text&rft.identifier=http%3A%2F%2Fdigilib.unila.ac.id%2F56776%2F4%2FSKRIPSI%2520TANPA%2520PEMBAHASAN.pdf&rft.identifier=++ANDIKO+ARDIYANTO%2C+1414071009++(2019)+PENENTUAN+DIFUSIVITAS+TERMAL+BIJI+JAGUNG+CURAH+BERBAGAI+UKURAN+MENGGUNAKAN+METODE+NUMERIK.++FAKULTAS+PERTANIAN%2C+UNIVERSITAS+LAMPUNG.+++++&rft.relation=http%3A%2F%2Fdigilib.unila.ac.id%2F56776%2F