Silo Drayer Nut Crackers

11. Silo Drayer

T = 60 C -Biji -Ampas T = 70 C -Air 22 T = 50 C -Biji -Ampas -Air 23 24 Silo drayer T = 90 C Panas Masuk : Alur 22 : Q Biji = 4.175,998 kg x 31,9624 kJkg K x 25 K = 3.336.872,962 kJ Q Abu = 43,185 kg x 0,882 kJkg K x 25 K = 952,229 kJ Q Air = 99,326 kg x 4,1840 kJkg K x 25 K = 10.389,450 kJ Total Panas masuk = 3.348.214,641 kJ Panas keluar : Alur 24 : Q Biji = 4.026,923 kg x 31,9624 kJkg K x 35 K = 4.504.854,329 kJ Q Abu = 32,475 kg x 0,882 kJkg K x 35 K = 1.002,503 kJ Alur 23 : Q Air = 259,111 kg x 4,1977 kJkg K x 45 K = 48.968,481 kJ Total panas keluar = 4.554.825,313 kJ Universitas Sumatera Utara Panas penguapan air dihitung dengan korelasi Watson : 0,38 11 12 1 2 Tr 1 Tr 1 ΔH ΔH        Tr1 = 3 , 647 273 80  = 0,545 Tr2 = 3 , 647 273 80  = 0,545 H1 = Panas penguapan pada titik didih air = 2676 kJkg Hv12 = 2676 x 38 , 576 , 1 545 , 1       = 2748,7257 kJkg Panas penguapan = m x Hv = 259,111 x 2748 kJ = 712037,028 kJ Panas masuk + Panas dibutuhkan = Panas keluar + Panas pengupan 3.348.214,641 + Panas dibutuhkan = 4.554.825,313 + 712.037,028 Panas dibutuhkan = 1.918.647,7 kJ Entalphi steam pada 70,11kPa, T 90 C = 2.283,2 kJkg K Saturated steam Maka Steam yang dibutuhkan : m = λ dQ = kJkg 2.283,2 kJ 7 1.918.647, = 840,333 kg Tabel LB.11 Neraca panas pada Silo Drayer Panas masuk kJ Panas Keluar kJ Komponen Alur 22 Alur 23 Alur 24 Biji Abu Air Panas Penguapan Panas dibutuhkan 3.336.872,962 952,229 10.389,450 - 1.918.647,7 - - 48.968,481 712.037,028 - 4.504.854,329 1.002,503 - - - Jumlah 5.266.862,341 761.005,509 4.505.856,313 Total 5.266.862,341 5.266.862,341 Universitas Sumatera Utara

12. Nut Crackers

24 25 T = 60 C - Biji -Ampas Nut Crackers T = 60 C - Biji -Ampas Panas masuk : Alur 24 : Q Biji = 4.026,923 kg x 31,9624 kJkg K x 35 K = 4.504.854,329 kJ Q Abu = 32,475 kg x 0,882 kJkg K x 35 K = 1.002,503 kJ Total Panas masuk = 4.505.856,832 kJ Panas Keluar : Alur 25 : Q Kernel = 3.209,36 kg x 20,354 kJkg K x 35 K = 2.286.315,97 kJ Q Cangkang = 850,038 kg x 11,6084 kJkg K x 35 K = 345.365,339 kJ Total panas keluar = 2.631.681,309 kJ Panas masuk = Panas keluar + Panas hilang Panas hilang = 4.505.856,832 – 2.631.681,309 = 1.874.175,523 kJ Tabel LB.12 Neraca Panas pada Nut Cracker Panas Masuk kJ Panas keluar kJ Komposisi Alur 24 Alur 25 Biji Kernel Abu Cangkang Panas hilang 4.504.854,329 - 1.002,503 - - - 2.286.315,97 - 345.365,339 1.874.175,523 Total 4.505.856,832 4.505.856,832 Universitas Sumatera Utara

13. Hidrocyclone