Rancang Bangun Perangkat Praktikum Perpindahan Panas Konveksi Paksa Pada Berkas Pin Fin Berpenampang Circular dengan Susunan ALigned

Wijiati, Linda (2019) Rancang Bangun Perangkat Praktikum Perpindahan Panas Konveksi Paksa Pada Berkas Pin Fin Berpenampang Circular dengan Susunan ALigned. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Laboratorium Themal Engineering merupakan wadah kegiatan mahasiswa untuk melakukan praktikum, pengujian dan penelitian tentang fenomena perpindahan panas. Kegiatan praktikum yang dilakukan bertujuan untuk menambah wawasan dan pengetahuan tentang perpindahan panas. Fenomena fisik perpindahan panas dapat terjadi secara konduksi, konveksi, dan radiasi. Gabungan mekanisme perpindahan panas antara konveksi dan konduksi dapat diaplikasikan pada sirip (fin) atau lebih dikenal dengan extended surface. Sirip (fin) banyak diaplikasikan dalam dunia industry, seperti penggunaan sirip pada heat exchanger.
Dalam rancang bangun perangkat ini, digunakan 16 buah circular pin fin dengan diameter 10 mm dan 16 mm dengan tinggi 70 mm dan disusun secara aligned yang diletakkan di dalam rectangular duct. Centrifugal blower sebagai alat untuk mengalirkan udara, dimana terdapat variasi kecepatan udara. Electric plate heater akan diletakkan di base plate sebagai sumber panas. Pemanasan pada circular pin fin dilakukan dengan menjaga agar temperatur permukaan tube tetap konstan sebesar 50 dan 70°C. Kemudian dilakukan pembacaan data temperature di 26 titik, yaitu 24 titik pada circular pin fin, 1 titik pada base plate serta pada T_out.
Berdasarkan eksperimen, diketahui bahwa distribusi temperature menurun di sepanjang pin fin. Temperature permukaan pin fin tertinggi dicapai oleh pin fin pada baris keempat dan pin fin yang terletak di sebelah tepi. Temperature tertinggi dicapai pada kecepatan 2.46 m/s dan temperature terendah dicapai pada kecepatan 4.20 m/s. Untuk varisi set point yang digunakan, koefisien konveksi yang tertinggi dicapai pada set point 50oC. Pada kecepatan yang sama, fin diameter 10 mm mempunyai koefisien konveksi yang lebih besar daripada fin diameter 16 mm. Pin fin diameter 10 mm mempunyai luas permukaan yang lebih kecil dan memberikan pitch atau spasi antar pin fin yang lebih luas daripada pin fin diameter 16 mm. Fluida membawa panas dari pin fin dan menyebabkan penurunan temperature sehingga perpindahan panas yang terjadi pada fin diameter 10 mm lebih baik daripada fin diameter 16 mm.
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The Thermal Engineering Laboratory is a place for student to conduct practice, test and, research on heat transfer phenomena. The purpose of this practice was to better understand about that phenomena. Physical heat transfer phenomena can occur by conduction, convection, and radiation. Combined heat transfer mechanism between convection and conduction can be applied on fin or better known as extended surface. Fin is widely applied in the industry, such as the use of fins in heat exchangers.
In the design of this device, 16 circular pin fins with diameters of 10 mm and 16 mm with a height of 70 mm were used and arranged in an aligned and placed inside the rectangular duct. Centrifugal blower as a tool for air flow, where there are variations in air velocity. Electric plate heater will be placed on the base plate as a heat source. Heating the circular pin fin is done by keeping the surface temperature of the tube constant at 50°C and 70°C. After that, the temperature data is read at 26 points (24 points on the fin circular pin, 1 point on the base plate and on Tout).
Based on the experiments, it is known that the temperature distribution decreases along the pin fin. The highest surface temperature of the pin fin is achieved on the fourth row and next to the edge. The highest temperature is reached at a speed of 2.46 m / s and the lowest temperature is reached at a speed of 4.20 m / s. For the set point variations that were used, the highest convection coefficient is reached at the 50°C set point. At the same speed, a fin with diameter of 10 mm has a convection coefficient greater than a diameter of 16 mm. In addition to that, a 10 mm diameter has a smaller surface area and a wider pitch (space between the pin fins) than diameter of 16 mm. The fluid carries heat from the pin fin and causes a decrease in temperature so that the heat transfer that occurs on the fin with diameter of 10 mm is better than the 16 mm.

Item Type:	Thesis (Undergraduate)
Additional Information:	RSM 621.402 5 Wij r-1 2019
Uncontrolled Keywords:	circular pin fin, extended surface, konveksi paksa, rectangular duct, susunan aligned
Subjects:	T Technology > TJ Mechanical engineering and machinery > TJ263 Heat exchangers
Divisions:	Faculty of Industrial Technology and Systems Engineering (INDSYS) > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Linda Wijiati Wijiati
Date Deposited:	21 Dec 2021 02:53
Last Modified:	21 Dec 2021 02:53
URI:	http://repository.its.ac.id/id/eprint/61741

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