Darmawan, Awan Satya (2016) Studi Eksperimen Pengaruh Dimensi Pipa Pada Sistem Air Conditioning Dengan Pre-Cooling. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.
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Abstract
Penggunaan air conditioner semakin banyak digunakan
pada kehidupan sehari-hari dikarenakan wilayah negara
indonesia yang beriklim tropis, dengan meningkatknya kebutuhan
energi pada masyarakat maka harga jual energi pun akan
semakin mahal. Dalam upaya menurunkan tingkat konsumsi
energi peralatan rumah tangga khususnya alat pengkondisian
udara tipe split, pada studi eksperimen ini mencoba
mengoptimalisasi dan menigkatkan efisiensi energi pada sistem
air conditioner dengan cara menambahkan satu buah evaporator
dan satu buah pre-cooling, dimana pembuangan kalor pada
bagian pre-cooling dimanfaatkan untuk memanaskan air yang
nantinya akan digunakan untuk keperluan rumah tangga.
Jenis alat ekspansi yang digunakan pada air conditioner
adalah pipa kapiler yang berfungsi untuk mengotrol laju aliran
massa dan menurunkan tekanan antara kondensor dan
evaporator dengan gesekan yang ditimbulkan pada pipa tersebut.
Untuk mencapai eifisiensi maksimum pemilihan pipa kapiler
harus mencapai kondisi dimana aliran refrigeran yang melewati
pipa kapiler tersebut sama besar dengan jumlah refrigeran yang
dipompa ke kompresor. Berkaitan dengan hal tersebut, maka
dilakukan studi eksperimen dengan variasi panjang pipa kapiler
pada sistem modifikasi air conditioner yang sudah tidak
konvensional lagi. Inside diameter pipa kapiler yang digunakan
d=0,054 in, dengan panjang kapiler 1 = 35 cm, kapiler 2 = 65
cm, kapiler 3 = 95 cm. Pada sistem ini terdapat 13 titik
pengukuran temperatur, 2 pengukuran high pressure, 1
pengukuran low pressure, mass flow rate, arus dan tegangan
listrik.
Hasil yang didapat dari studi eksperimen kali ini adalah
semakin bertambahnya panjang pipa kapiler, kapasitas
pendinginan evaporator, kerja kompresor dan coefficeient of
performance (COP) dari sistem juga akan semakin kecil dan juga
mengakibatkan temperatur masuk evaporator akan semakin kecil,
yang akan mengakibatkan efek pendinginan akan semakin besar.
Pada variasi pipa kapiler terpendek 35 cm menghasilkan data
kapasitas pendinginan total sebesar 2,25 kW, kerja kompresor
0,433 kW, temperatur masuk evaporator 7,26°C, COP sebesar
5,21 dan HRR sebesar 1,16. Sedangkan pada variasi pipa kapiler
terpanjang 95 cm kapasitas pendinginan total sebesar 0,72 kW,
kerja kompresor 0,332 kW, temperatur masuk evaporator 1,64°C,
COP sebesar 4,35 dan HRR sebesar 1,26
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The use of air conditioner is increasing in Indonesia for
daily life due to the tropical climate. That condition influences the
higher needs for energy sources therefore the energy selling price
is getting higher. In attempt to minimize the energy consumption
for household appliances especially air conditioning split type, in
this experimental study tried to optimize and increase energy
efficiency in air conditioner by adding one evaporator and one
pre-cooling, which heat disposal in pre-cooling part is used for
heating water which will be used for household needs.
The type of expansion tool used in air conditioner was
capillary tube functioning to control mass flow rate and decrease
the pressure between condenser and evaporator with the friction
coming out from those pipes. To get maximum efficiency, the
election of capillary tube had to meet the condition in which the
refrigerant flow, passing through capillary tube, should as big as
the amount of refrigerant pumped to compressor. Related to that
condition, this experimental study used various lengths of
capillary tubes in air conditioner modification system which is no
longer conventional. Diameter of capillary pipe which was used
was d=0,054 inch, with the length of capillary1 = 35 cm,
capillary 2 = 65 cm, capillary 3 = 95 cm. In this system, there
were 13 temperature measure points, 2 high pressure
measurements, 1 low pressure measurement, mass flow rate, and
flow and electricity voltage.
The result of this study showed that the longer the
capillary tube was, the capacity of evaporator cooling,
compressor performance, and coefficient of performance (COP)
of this system were also smaller. That condition would affect in
higher cooling effect. In the shortest capillary tube variation
which was 35cm, resulted total cooling capacity for 2,25 kW,
compressor performance 0,433 kW, temperature entering
evaporator 7,26°C, 5,21 of COP, and 1, 16 of HRR. In the longest
capillary tube variation which was 95cm, the total cooling
capacity was 0,72 kW, compressor performance 0,332 kW,
temperature entering evaporator 1,64°C, 4,35 of COP, and 1,26
HRR.
| Item Type: | Thesis (Undergraduate) |
|---|---|
| Additional Information: | RSM 621.402 2 Dar s |
| Uncontrolled Keywords: | Refrigerasi, pipa kapiler, efisiensi, modifikasi pengkondisian udara |
| Subjects: | T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics. Tubes--Fluid dynamics T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL681.A5 Air conditioning (Aeronautics ) |
| Divisions: | Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis |
| Depositing User: | EKO BUDI RAHARJO |
| Date Deposited: | 11 Jun 2020 03:19 |
| Last Modified: | 11 Jun 2020 03:19 |
| URI: | http://repository.its.ac.id/id/eprint/76140 |
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