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All Journal JTTM: Jurnal Terapan Teknik Mesin
Parman Sinaga
Institut Teknologi Budi Utomo, Jakarta, Indonesia
Aerospace Engineering Control & Systems Engineering Engineering Mechanical Engineering

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Kajian sistem pendingin udara ditinjau dari kerusakan evaporator pada kendaraan ringan merk ‘x’ Srihanto; Parman Sinaga; Sigit Yulianto; Ricky Perdana Handono
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 1 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i1.451

Abstract

Pada sebuah kendaraan merk ‘X’ ditemukan masalah pada sistem AC dengan gejala AC tidak dingin. Oleh karenanya diperlukan analisis dengan tujuan untuk mengetahui akar penyebab AC tidak dingin. Metode penelitian yang digunakan untuk mendukung analisis yakni metode kuantitatif. Dari hasil penelitian pengukuran tekanan tinggi 10 bar, tekanan tinggi normal 12-14 (bar). Tekanan rendah hasil pengukuran 1,6 bar, tekanan rendah normal 2-4 (bar). Kebocoran evaporator yang mengalami benturan benda padat asing dan akumulasi kotoran yang tidak tersaring ketika udara dihembuskan oleh blower, oleh karenanya tekanan hasil pengukuran dibawah standar yang mengindikasikan jumlah refrigerant di dalam sistem AC berkurang. Dari hasil perbaikan dan penambahan saringan udara, sistem AC mengalami peningkatan kinerja. Hal ini ditandai oleh turunnya nilai kerja kompresor dari 40 kJ/kg menjadi 29 kJ/kg, naiknya nilai efisiensi refrigerasi dari 72% menjadi 75%, dan temperatur kabin dari 320C dengan RH 86% menjadi 250C dengan RH 72%.
Analysis of the air system of the 2-floor electronics industry building PT. CI Srihanto; Moch.Sugiri; Parman Sinaga; Prio Sejati
JTTM : Jurnal Terapan Teknik Mesin Vol 4 No 2 (2023): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v4i2.619

Abstract

For urban areas and Jakarta's industrial sector, air freshener systems and air conditioners are becoming increasingly necessary. At the electronics-focused PT. CI Jakarta, the air conditioner cools the space. The goal of this research is to raise staff comfort levels and productivity levels in order to enhance output. Planning information and a cooling load analysis are needed in order to implement the cooling system in the industrial building. To determine how much AC (Air Conditioner) is required, it is important to analyze the calculation of the design of the AC (Air Conditioner) in the industrial room at PT. CI. The first step in the planning process is to identify the industrial building data, which includes the room's area and wall material as well as its contents. Analyze cooling load to calculate engine power. Choosing a cooling system and cooling. The cooling load analysis at the electronics industry building produced 712 kW of results, including a sensible load of 705.83 kW and a Latent load of 3.03 kW. The machine uses R134a as its refrigerant. 355.5 HP for the compressor. COP 2.77 is of a medium size. The central AC system was chosen as the cooling system
Performance analysis of refrigeration system with 1 pk compressor based on evaporator temperature variation M. Sugiri; Indra Widarmadi; Parman Sinaga
JTTM : Jurnal Terapan Teknik Mesin Vol 6 No 1 (2025): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Universitas Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v6i1.1566

Abstract

Refrigeration machines or also called cooling machines are machines that can cause the refrigeration effect, while refrigerants are substances used as working fluids in the heat absorption process. Refrigeration is a process of absorbing heat from a substance or product so that its temperature is below the ambient temperature. The purpose of the study was to analyze the performance of the refrigeration machine and the research method used was the experimental method by testing a 1 PK cooling machine using R134a refrigerant with temperature variations in the evaporator room. The results of this study showed that the performance of the refrigeration system to reach a temperature of -15º C took 7 hours 45 minutes with a load of 10 liters of water. The lowest compressor power value was 0.5307 kW and the highest was 0.6566 kW. The lowest compressor work value was 32 kJ/kg and the highest was 41 kJ/kg. The lowest heat value released by the condenser was 1.95 kW and the highest was 2.698 kW. The lowest calorific value absorbed by the evaporator is 1.43 kW and the highest is 2.09 kW, the lowest refrigerant mass flow rate value is 0.013 kg/s and the highest is 0.019 kg/s. The lowest actual COP value is 2.69 and the highest is 3.43.
Co-Authors Indra Widarmadi Moch Sugiri Prio Sejati Ricky Perdana Handono Sigit Yulianto Srihanto