Veva, Muhammad Rizqi Aditya (2023) Analisis Karakteristik dan Sifat Termofisika Phase Change Material (PCM) Berbasis Salt Hydrate Kalsium Klorida dengan Zat Aditif untuk Aplikasi Sistem Refrigerasi Hybrid pada Reefer Container. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Reefer container bergantung pada energi listrik kapal dalam skala besar sebagai sumber dayanya. Reefer container tidak dapat berfungsi secara optimal tanpa pasokan energi listrik yang kontinu. Dalam upaya mengatasi fluktuasi suhu dan mengurangi konsumsi energi, telah diperkenalkan teknologi berupa Phase Change Material (PCM) yang mampu menyimpan energi termal dan diterapkan pada sistem pendinginan hybrid pada reefer container. Penelitian ini bertujuan untuk menguji dan menganalisis karakteristik, sifat termofisika, dan pengaruh penambahan zat aditif (agen nukleasi dan agen pengental) pada karakteristik dan sifat termofisika PCM berbasis salt hydrate untuk aplikasi pada suhu rendah. Metode yang digunakan pada penelitian ini yaitu metode eksperimental meliputi Supercooling Test, DSC Test, dan FTIR Test. Dari keenam sampel yang telah diuji, terdapat dua sampel terbaik yaitu sampel S1 dan S6. Hal tersebut dikarenakan memiliki titik beku antara -20°C s.d. -25°C sesuai dengan temperatur kerja reefer container dan derajat supercooling yang rendah. Sampel PCM S1-C20S0 (20% w.t. CaCl2 - H2O) memiliki titik beku -21.33°C, derajat supercooling rendah sebesar 0.45°C, dan kalor laten sebesar 6.64 J/g. Sampel PCM S6-C20S2C05 (20% w.t. CaCl2 - H2O + 2% w.t. SrCl2·6H2O + 0.5% w.t. CMC) memiliki titik beku -24.49°C, derajat supercooling sebesar 0.05°C, dan kalor laten sebesar 3.11 J/g. Kedua larutan ini menunjukkan adanya gugus OH dan C=O, maka tergolong sebagai larutan hidrat, khususnya salt hydrate. Adapun pengaruh penambahan zat aditif dapat mengurangi derajat supercooling pada larutan PCM, tetapi juga mengurangi kalor laten larutan PCM.
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The reefer container relies on the ship's large-scale electrical energy as its power source. The reefer container cannot function optimally without a continuous supply of electrical energy. To address temperature fluctuations and reduce energy consumption, a technology called Phase Change Material (PCM) has been introduced. It can store thermal energy and is applied to the hybrid cooling system in reefer containers. This research aims to test and analyze the characteristics, thermophysical properties, and the effects of adding additives (nucleating agents and thickening agents) to the characteristics and thermophysical properties of PCM based on salt hydrates for low-temperature applications. The research method used in this study includes experimental methods such as the Supercooling Test, DSC Test, and FTIR Test. Among the six samples tested, two of the best samples are S1 and S6. This is because they have a freezing point between -20°C to -25°C, which is suitable for the working temperature of reefer containers, and they exhibit a low degree of supercooling. The PCM sample S1-C20S0 (20% w.t. CaCl2 - H2O) has a freezing point of -21.33°C, a low supercooling degree of 0.45°C, and a latent heat of 6.64 J/g. Meanwhile, the PCM sample S6-C20S2C05 (20% w.t. CaCl2 - H2O + 2% w.t. SrCl2·6H2O + 0.5% w.t. CMC) has a freezing point of -24.49°C, a supercooling degree of 0.05°C, and a latent heat of 3.11 J/g. Both solutions exhibit OH and C=O groups, classifying them as hydrate solutions, particularly salt hydrates. Furthermore, the addition of additives can reduce the supercooling degree in PCM solutions but also decrease the latent heat of the PCM solution.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | DSC Test, FTIR Test, Phase Change Material, Supercooling Test |
| Subjects: | V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering > VM485 Cold storage on ships. Marine refrigeration. |
| Divisions: | Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis |
| Depositing User: | Muhammad Rizqi Aditya Veva |
| Date Deposited: | 21 Sep 2023 01:32 |
| Last Modified: | 21 Sep 2023 01:32 |
| URI: | http://repository.its.ac.id/id/eprint/101834 |
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