Studi Eksperimen Pengaruh Panjang Pipa Kapiler Terhadap Performa Sistem Refigerasi Kulkas Dua Pintu Pada Unit Trainer Modular Berbasis Banana Jack

Kishmadi, Naufal Rafif (2026) Studi Eksperimen Pengaruh Panjang Pipa Kapiler Terhadap Performa Sistem Refigerasi Kulkas Dua Pintu Pada Unit Trainer Modular Berbasis Banana Jack. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini bertujuan untuk merancang bangun unit trainer kulkas dua pintu modular berbasis banana jack dan menganalisis pengaruh variasi panjang pipa kapiler terhadap performa sistem refrigerasi. Sistem kelistrikan dimodifikasi menggunakan antarmuka banana jack untuk memfasilitasi kegiatan praktikum dan simulasi pengawatan wiring secara aman. Pengujian performa dilakukan melalui eksperimen tanpa beban termal no-load pull-down test dengan memodifikasi jalur ekspansi menjadi sistem manifold paralel. Variasi pipa kapiler yang diuji adalah 150 cm, 200 cm, dan 250 cm, menggunakan refrigeran R-134a pada tekanan pengisian konstan 20 PSIG. Hasil penelitian menunjukkan bahwa dimensi panjang pipa kapiler berbanding lurus dengan besarnya hambatan aliran pressure drop. Pipa kapiler 150 cm menghasilkan kondisi kurang hambatan under-restriction dengan suhu evaporasi -12,18°C, sedangkan kapiler 250 cm memicu hambatan berlebih over-restriction yang memaksa kompresor beroperasi pada tekanan vakum (-10 Psig). Konfigurasi pipa kapiler 200 cm ditetapkan sebagai rancangan paling optimal karena mampu memberikan keseimbangan suhu pendinginan freezer yang ideal (-16,5°C), menjaga stabilitas tekanan hisap kompresor pada batas aman (5 Psig), serta menghasilkan nilai Coefficient of Performance (COP) aktual sebesar 2,20.
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This study aims to design a modular two-door refrigerator trainer unit based on banana jack and analyze the effect of variations in the length of the capillary tube on the performance of the refrigeration system. The electrical system is modified using a banana jack interface to facilitate practical activities and simulation of wiring safely. Performance testing is carried out through a no-load pull-down test experiment by modifying the expansion path into a parallel manifold system. The variations of the capillary tubes tested are 150 cm, 200 cm, and 250 cm, using R-134a refrigerant at a constant charging pressure of 20 PSIG. The results show that the length of the capillary tube is directly proportional to the magnitude of the pressure drop flow resistance. The 150 cm capillary tube produces a condition of less resistance under-restriction with an evaporation temperature of -12.18°C, while the 250 cm capillary triggers excessive resistance over-restriction which forces the compressor to operate at a vacuum pressure (-10 Psig). The 200 cm capillary tube configuration was determined as the most optimal design because it was able to provide an ideal freezer cooling temperature balance (-16.5°C), maintain the stability of the compressor suction pressure at a safe limit (5 Psig), and produce an actual Coefficient of Performance (COP) value of 2.20.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Banana Jack, Coefficient of Performance (COP), Rancang Bangun, Trainer Kit, Sistem Refigrasi. Banana Jack, Coefficient of Performance (COP), Design and Construction, Trainer Kit, Refrigeration System.
Subjects:	T Technology > TH Building construction > TH7687.7 Cooling Systems and details
Divisions:	Faculty of Vocational > Mechanical Industrial Engineering (D4)
Depositing User:	Naufal Rafif Kishmadi
Date Deposited:	03 Aug 2026 04:38
Last Modified:	03 Aug 2026 04:38
URI:	http://repository.its.ac.id/id/eprint/142118

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