Budhiyanto, Akbar (2015) Re-design High Pressure Heater (HPH) 4 PT. PJB UP Gresik menggunakan analisa termodinamika dan perpindahan panas. Diploma thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Dalam memenuhi kebutuhan tenaga listrik di Jawa -
Bali, PT. PJB UP Gresik menggunakan Siklus Rankine-
Regenerative untuk meningkatkan efisiensi siklus PLTU, yaitu
dengan menambahkan feedwater heater sebelum boiler.
Akan tetapi sering terjadi kerusakan pada feedwater heater,
salah satunya High Pressure Heater (HPH) 4. Kerusakan yang
sering terjadi pada HPH 4 adalah kebocoran tube dan
keausan baffle. Kerusakan pada HPH 4 terus menerus
berulang dapat mengurangi umur, efektifitas dan performa
dari HPH serta mengurangi efisiensi siklus PLTU.
Oleh karena itu dilakukan re-design HPH 4 untuk
mendapatkan dimensi baru HPH 4, khususnya zona
desuperheating. Pada perancangan HPH 4 digunakan analisa
termodinamika dan perpindahan panas dengan metode
LMTD untuk mendapatkan dimesi tiap zona. Dalam perancangan, divariasikan kecepatan
feedwater dan jumlah baffle pada zona desuperheating. Dari
perhitungan yang dilakukan, didapatkan dimensi HPH 4
dengan effective length 12,36 m, diameter dalam shell 0,4 m
dengan jumlah tube sebanyak 598 buah. Selain itu
didapatkan dimensi zona desuperheating dengan panjang
zona 1,54 m dengan baffle spacing sebesar 0,25 m, jumlah
baffle 5 buah dan luasan perpindahan panasnya sebesar
46,33 m2. Batas plugging yang diijinkan adalah sebesar 10%,
jika melebihi 10% plugging akan terjadi vibrasi.
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PT. PJB UP. Gresik using Rankine-Regenerative Cycle
for increasing PLTU cycle efficiency. The efficiency is the result
of adding feedwater heater before boiler device. However,
defectiveness over feedwater heater frequently happened, such as
High Pressure Heater (HPH) 4 for tube leakage and baffles
worn-out. Defectiveness on HPH 4 continually could reduce its
life span, effectiveness and performance, regarding PLTU. The
HPH defectiveness could also decreasing PLTU cycle efficiency.
Therefore, HPH 4 re-designing is needed to gain a new
HPH 4 dimension especially for desuperheating zone.
Thermodynamics and heat transfer analysis using LMTD method
to design HPH 4 to gain each zone’s dimension.
Variant of feedwater speed and number of baffles on
desuperheating zone was used for designing HPH 4. Result
calculation show that HPH dimension has effective length 12,36
m, diameter in shell units 0,4 m and the number of tube in use
598 tubes. Moreover, for desuperheating zone dimension was
obtained zone length of 1,54 m, baffles spacing 0,25 m, number of baffles 5 and the heat transfer area 46,33 m2. Plugging point
allowed was 10%, if it’s above 10% plugging would allow
vibration.
| Item Type: | Thesis (Diploma) |
|---|---|
| Additional Information: | RSM 621.402 5 Bud r |
| Uncontrolled Keywords: | High Pressure Heater; Desuperheating zone; LMTD; Re-Design Heat Exchanger; Close Feedwater Heater |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21401-(D3) Diploma 3 |
| Depositing User: | - Taufiq Rahmanu |
| Date Deposited: | 04 Oct 2019 07:35 |
| Last Modified: | 04 Oct 2019 07:35 |
| URI: | http://repository.its.ac.id/id/eprint/70998 |
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