Karakteristik Perpindahan Panas Alat Penukar Kalor Tipe Staggered Fins Berisi Material Fasa Berubah dari Minyak Kelapa pada Proses Pembekuan

Muhammad Irsyad, Amrizal Amrizal, Aji Muhammad Yulian, M. Dyan Susila

Abstract


Indonesia, located in the tropics, has a dependency on air conditioners to obtain the thermal comfort of the room. This phenomenon resulted in the electricity consumption of the building increased significantly. On the other hand, Indonesia has the potential for cold air at night that is in the range of the thermal comfort temperature of the room or lower. The potential for cold air can be exploited by using Phase Change Material (PCM). Coconut oils are commodities that are widely produced in Indonesia. These materials have good potential to be developed as PCM because they have high latent heat and the temperature of phase change matches the temperature of the cold air at night. This research used a staggered fins type heat exchanger with a total of 39 pieces, mounted zig zag with the number of lines was 11. Fins were made of hollow aluminium with a size of 1x0.5 inches with a height of 150 mm. The PCMs used were coconut oil with a mass of 1.5 kg. The temperature and velocity of entering cold air were 20oC, 1 m/s, 2 m/s and 3 m/s. This study aims to determine the ability of PCM to release thermal so that it undergoes phase changes. The results showed that low cold airflow velocity resulted in subcooling while at 3 m/s, subcooling did not occur. The most considerable cooling rate occurred at 3 m/s that was 0.16oC/min. The percentage of solid mass formed after 60 minutes for each velocity was 37.8%, 58%, and 76.2%. The most considerable amount of heat absorbed by air was 167.7 kJ. Based on this, coconut oils are very potential to be developed by observing the temperature and velocity of the enter cold air.


Keywords


Phase Change Material; Coconut Oil; Heat Exchanger

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References


[SNI 6390:2011, Konservasi Energi Sistem Tata Udara Pada Bangunan Gedung, Jakarta, Badan Standarisasi Nasional (BSN) 2011.

BPS, Statistik Indonesia 2015, Jakarta, Badan Pusat Statistik, 2015.

YOSHIDA, K., Study on Energy Efficiency Conservation and Efficiency Improvement in The Republic Indonesia, In final report Japan International Cooperation Agency (JICA), 2009.

SAIDUR, R., “Energy consumption, energy savings, and emission analysis in Malaysian office buildings”, Energy Policy, v. 37, n. 10, pp. 4104–4113, Oct. 2009.

XIA, J., HONG, T., SHEN, Q., FENG, W., YANG, L., IM, P., LU, A., dan BHANDARI, M., “Comparison of building energy use data between the United States and China”, Energy and Buildings, v. 78, pp. 165 – 175, 2014.

MOROVAT, N., ATHIENITIS, A.K., CANDANEDO, J.A., DERMARDIROS, V., “Simulation and performance analysis of an active PCM-heat exchanger intended for building operation optimization”, Energy & Buildings, v. 199, pp. 47–61, Sept. 2019.

CASTELL, A., MARTORELL, I., MEDRANO, M., PEREZ, G., dan CABEZA, L.F., “Experimental study of using PCM in brick constructive solutions for passive cooling”, Energy and Buildings, v. 42, n. 4, pp. 534 – 540, Apr. 2010.

IRSYAD, M., PASEK, A.D., INDARTONO, Y.S., PRATOMO, A.W., “Heat transfer characteristics of building walls using phase change material”, IOP Conf. Series: Earth and Environmental Science, v. 60, 012028, pp. 1-6, 2017.

KOUKOUA, M.K., VRACHOPOULOSA, M.G., TACHOSA, N.S., DOGKASA, G., LYMPERISB, K., dan STATHOPOULOSC, V., “Experimental and computational investigation of a latent heat energy storage system with a staggered heat exchanger for various phase change materials”, Thermal Science and Engineering Progress, v. 7, pp. 87–98, Sept. 2018.

BROUSSEAU, P., dan LACROIX, M., “Study of the thermal performance of a multi-layer PCM storage unit”, Energy Conversion Management, v. 37, n. 5, pp. 599–609, May 1996.

BANASZEK, J., DOMANSKI, R., REBOW, M., dan EL-SAGIER, F., “Numerical analysis of the paraffin wax-air spiral thermal energy storage unit”, Applied Thermal. Engineering. v. 20, n.4, pp. 323–354, March 2000.

ISMAIL, K.A.R., dan HENRIQUEZ, J.R., “Numerical and experimental study of spherical capsules packed bed latent heat storage system”, Applied Thermal. Engineering. v. 22, n. 15, pp. 1705–1716, Oct. 2002.

IRSYAD, M., dan HARMEN, “Potensi Material Fasa Berubah untuk Aplikasi Penyejuk Ruangan di Indonesia”, In: Prosiding Seminar Nasional Rekayasa Material, Sistem Manufaktur, dan Energi, pp. 108112, Makassar, Nov. 2016.

MBULU, B.C.P., WARDANA, I.N.G., dan Siswanto, E., “ Produksi Hidrogen dari Campuran Air dan Minyak Kelapa Murni (VCO) Melalui Porous Media Tembaga Menggunakan Prinsip Hydrogen Reformer”, Jurnal Rekayasa Mesin, v. 7, n. 2, pp. 87 – 93, Agust. 2016

METTAWEE, E.S., dan EAD, A.I., “Energy Saving in Building with Latent Heat Storage”, International Journal of Thermal & Environmental Engineering, v. 5, n.1, pp. 21 – 30, 2013

BERLAMEN, J.G., dan SUNIL, J., “Enhancement of Kinematic viscosity of coconut oil”, International Journal of Engineering Development and Research, v. 6, n. 3, pp. 430 – 432, 2018.

SILALAHI, A.O., SUKMAWATI, N., SUTJAHJA, I.M., KURNIA, D., dan WONORAHARDJO, S., “Thermophysical Parameters of Organic PCM Coconut Oil from T-History Method and Its Potential as Thermal Energy Storage in Indonesia”, IOP Conf. Ser. Mater. Sci. Eng, v. 214, 012034, pp. 1-8, 2017.

PUTRI, W.A., FAHMI, Z., SUTJAHJ, I.M., KURNIA, D., dan WONORAHARDJO, S., “Thermophysical parameters of coconut oil and its potential application as the thermal energy storage system in Indonesia”, Journal of Physics: Conference Series, v. 739, n.1, 012065, pp. 1-6, 2016.




DOI: https://doi.org/10.21776/ub.jrm.2020.011.02.3

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