PENGGUNAAN HEAT EXCHANGER DALAM PENGOLAHAN GULA AREN

2019 ◽  
Vol 1 (2) ◽  
pp. 18-21
Author(s):  
Fidya Varayesi
Keyword(s):  
Heat Exchanger

Sebelumnya dengan cara tradisional gula aren dimasak sebanyak 20 liter dengan menggunakan panci yang menggunakan api dari kayu yang dibakar. Sehingga dapat diperkirakan seorang petani memerlukan sekitar 30 kg kayu per hari. Pendidihan gula aren memakan waktu 4 – 5 jam (Julius,2015).Metode yang akan digunakan pada paper ini adalah menggunakan heat exchanger untuk menghasilkan air panas yang dapat mendidihkan gula aren secara lebih efisien. Fluida (brine) yang diperoleh dari separator dialirkan kedalam tube kemudian digunakan untuk mendidihkan nira sehingga menjadi larutan gula aren. Dari hasil perhitungan,nilai LMTD pada heat exchanger untuk mendidihkan nira adalah 80°C adalah 42,9°C. 

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

EFFECT OF AMBIENT HEAT-IN-LEAKS ON A THREE-FLUID CRYOGENIC HEAT EXCHANGER WITH TWO THERMAL COMMUNICATIONS

2014 ◽  
Vol 6 (4) ◽  
pp. 285-300 ◽  
Author(s):  
Venkataram Krishna ◽  
S. Spoorthi ◽  
Pradeep G. Hegde ◽  
K. N. Seetharamu
Keyword(s):  
Heat Exchanger
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