Abdul Rahman, . (2025) ANALISIS KINERJA HEAT EXCHANGER SHELL AND TUBE MODEL WATER COOLER TYPE OR-60 DENGAN METODE LMTD DAN NTU. Skripsi thesis, Universitas Pembangunan Nasional Veteran Jakarta.
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Abstract
This study aims to analyze the performance of a shell and tube heat exchanger of type OR-60 in a water cooler system using the Log Mean Temperature Difference (LMTD) and Number of Transfer Units (NTU) methods. Experiments were conducted at a hot fluid temperature of 70°C with two flow rate variations, 0.22 kg/s and 0.13 kg/s, to evaluate the effect of flow rate on heat transfer efficiency. The results show that flow rate significantly impacts the performance of the heat exchanger. At a flow rate of 0.22 kg/s, the heat transfer coefficient on the tube side (hi) reached 2760.25 J/m²°C, while the shell side (ho) achieved 4002.58 J/m²°C. Conversely, at a flow rate of 0.13 kg/s, hih_ihi and hoh_oho decreased to 271.42 J/m²°C and 523.11 J/m²°C, respectively. The system efficiency based on the LMTD and NTU methods at a flow rate of 0.22 kg/s was recorded at 44.6% and 42.0%, respectively, while at 0.13 kg/s, efficiency drastically dropped to 7.77% and 10.59%. Higher efficiency at 0.22 kg/s is attributed to turbulent flow, which enhances heat transfer, as indicated by the Reynolds number (Re) on the shell side, which reached 4815.85. In contrast, a flow rate of 0.13 kg/s resulted in laminar flow with a Reynolds number of 4770.09, leading to less optimal heat transfer. This study concludes that higher flow rates improve the performance of the heat exchanger. Therefore, it is recommended to operate the OR-60 heat exchanger at higher flow rates and optimize its design to enhance heat transfer efficiency at lower flow rates.
| Item Type: | Thesis (Skripsi) |
|---|---|
| Additional Information: | [No.Panggil: 2010311022] [Pembimbing; Fahrudin] [Penguji 1: Damora Rhakasywi] [Penguji 2: Fitri Wahyuni] |
| Uncontrolled Keywords: | Heat exchanger, shell and tube, LMTD, NTU, heat transfer, efficiency |
| Subjects: | Q Science > QA Mathematics > QA75 Electronic computers. Computer science Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) T Technology > TC Hydraulic engineering. Ocean engineering T Technology > TJ Mechanical engineering and machinery |
| Divisions: | Fakultas Teknik > Program Studi Teknik Mesin (S1) |
| Depositing User: | ABDUL RAHMAN |
| Date Deposited: | 13 Mar 2025 01:09 |
| Last Modified: | 13 Mar 2025 01:09 |
| URI: | http://repository.upnvj.ac.id/id/eprint/36290 |
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