Ramanda, Reihan Adelia (2023) Analisis Kompatibilitas Material dan Keandalan Termal Phase Change Material Berbasis Salt Hydrate Kalsium Klorida dengan Zat Aditif Untuk Sistem Refrigerasi Hibrida. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Pengembangan Thermal Energy Storage (TES) merupakan salah satu solusi untuk menutupi kesenjangan antara permintaan dan pasokan energi dengan menggunakan Phase Change Material (PCM). PCM dapat menyimpan dan melepaskan sejumlah besar panas laten melalui perubahan fasa dalam suhu konstan. Dalam menggunakan PCM terdapat beberapa aspek yang harus diperhatikan yaitu degredasi kemampuan dalam menyimpan panas dan material enkapsulasi PCM mengingat perilaku korosif dari beberapa PCM. Penelitian ini melakukan uji eksperimental dengan metode uji siklus termal, uji korosi analisa gravimetri dan uji Differential Scanning Calorimetry (DSC). PCM yang digunakan merupakan salt hydrates PCM A1-C20S0 (20 w.t.% CaCl2 + 80 w.t.% H2O) dan PCM A2-C20S2C05 (20 w.t.% CaCl2 + 80 w.t.% H2O + 2 w.t.% SrCl2.6H2O + 0,5 w.t.% CMC) yang telah melalui 250 siklus termal dengan suhu berkisar antara -15oC hingga -25oC. Berdasarkan hasil uji korosi material yang paling kompatibel untuk dua variasi PCM yang digunakan yaitu stainless steel. Hal tersebut karena stainless steel memiliki nilai rata-rata laju korosi paling rendah diantara aluminium dan tembaga. PCM dengan tambahan zat aditif sebelum dan sesudah 250 siklus termal terjadi kenaikan nilai kalor laten, namun nilai kalor laten yang didapatkan lebih rendah dari PCM tanpa zat aditif sebelum dan sesudah 250 siklus termal. Hal ini menandakan bahwa penambahan zat aditif dapat menurunkan nilai kalor laten pada PCM yang diuji. Dalam 250 siklus termal juga terjadi penurunan titik beku yang menandakan bahwa penurunan stabilitas termofisika PCM.
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The development of Thermal Energy Storage (TES) is one solution for bridging the gap between energy demand and supply by utilizing Phase Change Materials (PCM). PCM can store and release a significant amount of latent heat through phase changes at a constant temperature. When using PCM, several aspects need to be considered, such as the degradation of heat storage capacity and the encapsulation material for PCM, given the corrosive behavior of some PCM. This research conducted experimental tests using the thermal cycle test method, gravimetric analysis for corrosion testing, and DSC (Differential Scanning Calorimetry) test. The PCMs used were salt hydrates PCM A1-C20S0 (20 w.t.% CaCl2 + 80 w.t.% H2O) and PCM A2-C20S2C05 (20 w.t.% CaCl2 + 80 w.t.% H2O + 2 w.t.% SrCl2.6H2O + 0.5 w.t.% CMC), which underwent 250 thermal cycles ranging from -15oC to -25oC. Based on the corrosion test results, stainless steel was found to be the most compatible material for both variations of PCM used, as it had the lowest average corrosion rate compared to aluminum and copper. The addition of additive substances to PCM before and after 250 thermal cycles resulted in an increase in latent heat value, although the obtained latent heat value was lower than that of PCM without additive substances before and after 250 thermal cycles. This indicates that the addition of additive substances can reduce the latent heat value of the tested PCM. In the 250 thermal cycles, there was also a decrease in the freezing point, indicating a decrease in the thermophysical stability of the PCM.
| Item Type: | Thesis (Other) |
|---|---|
| Uncontrolled Keywords: | Energy, Refrigeration, Encaptulation, Corrosion, PCM, Energi, Refrigerasi, Enkapsulasi, Korosi |
| Subjects: | H Social Sciences > HD Industries. Land use. Labor > HD45 Technological innovations T Technology > TA Engineering (General). Civil engineering (General) > TA418.75 Corrosion-resistant materials V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering 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: | Reihan Adelia Ramanda |
| Date Deposited: | 28 Aug 2023 06:26 |
| Last Modified: | 28 Aug 2023 06:26 |
| URI: | http://repository.its.ac.id/id/eprint/101755 |
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