Studi Eksperimen Pengaruh Dimensi Pipa Pada Sistem Air Conditioning Dengan Pre-Cooling

Darmawan, Awan Satya (2016) Studi Eksperimen Pengaruh Dimensi Pipa Pada Sistem Air Conditioning Dengan Pre-Cooling. Undergraduate thesis, Institut Teknologi Sepuluh Nopember Surabaya.

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Abstract

Penggunaan air conditioner semakin banyak digunakan pada kehidupan sehari-hari dikarenakan wilayah negara indonesia yang beriklim tropis, dengan meningkatknya kebutuhan energi pada masyarakat maka harga jual energi pun akan semakin mahal. Dalam upaya menurunkan tingkat konsumsi energi peralatan rumah tangga khususnya alat pengkondisian udara tipe split, pada studi eksperimen ini mencoba mengoptimalisasi dan menigkatkan efisiensi energi pada sistem air conditioner dengan cara menambahkan satu buah evaporator dan satu buah pre-cooling, dimana pembuangan kalor pada bagian pre-cooling dimanfaatkan untuk memanaskan air yang nantinya akan digunakan untuk keperluan rumah tangga. Jenis alat ekspansi yang digunakan pada air conditioner adalah pipa kapiler yang berfungsi untuk mengotrol laju aliran massa dan menurunkan tekanan antara kondensor dan evaporator dengan gesekan yang ditimbulkan pada pipa tersebut. Untuk mencapai eifisiensi maksimum pemilihan pipa kapiler harus mencapai kondisi dimana aliran refrigeran yang melewati pipa kapiler tersebut sama besar dengan jumlah refrigeran yang dipompa ke kompresor. Berkaitan dengan hal tersebut, maka dilakukan studi eksperimen dengan variasi panjang pipa kapiler pada sistem modifikasi air conditioner yang sudah tidak konvensional lagi. Inside diameter pipa kapiler yang digunakan d=0,054 in, dengan panjang kapiler 1 = 35 cm, kapiler 2 = 65 cm, kapiler 3 = 95 cm. Pada sistem ini terdapat 13 titik pengukuran temperatur, 2 pengukuran high pressure, 1 pengukuran low pressure, mass flow rate, arus dan tegangan listrik. Hasil yang didapat dari studi eksperimen kali ini adalah semakin bertambahnya panjang pipa kapiler, kapasitas pendinginan evaporator, kerja kompresor dan coefficeient of performance (COP) dari sistem juga akan semakin kecil dan juga mengakibatkan temperatur masuk evaporator akan semakin kecil, yang akan mengakibatkan efek pendinginan akan semakin besar. Pada variasi pipa kapiler terpendek 35 cm menghasilkan data kapasitas pendinginan total sebesar 2,25 kW, kerja kompresor 0,433 kW, temperatur masuk evaporator 7,26°C, COP sebesar 5,21 dan HRR sebesar 1,16. Sedangkan pada variasi pipa kapiler terpanjang 95 cm kapasitas pendinginan total sebesar 0,72 kW, kerja kompresor 0,332 kW, temperatur masuk evaporator 1,64°C, COP sebesar 4,35 dan HRR sebesar 1,26 ============================================================================================= The use of air conditioner is increasing in Indonesia for daily life due to the tropical climate. That condition influences the higher needs for energy sources therefore the energy selling price is getting higher. In attempt to minimize the energy consumption for household appliances especially air conditioning split type, in this experimental study tried to optimize and increase energy efficiency in air conditioner by adding one evaporator and one pre-cooling, which heat disposal in pre-cooling part is used for heating water which will be used for household needs. The type of expansion tool used in air conditioner was capillary tube functioning to control mass flow rate and decrease the pressure between condenser and evaporator with the friction coming out from those pipes. To get maximum efficiency, the election of capillary tube had to meet the condition in which the refrigerant flow, passing through capillary tube, should as big as the amount of refrigerant pumped to compressor. Related to that condition, this experimental study used various lengths of capillary tubes in air conditioner modification system which is no longer conventional. Diameter of capillary pipe which was used was d=0,054 inch, with the length of capillary1 = 35 cm, capillary 2 = 65 cm, capillary 3 = 95 cm. In this system, there were 13 temperature measure points, 2 high pressure measurements, 1 low pressure measurement, mass flow rate, and flow and electricity voltage. The result of this study showed that the longer the capillary tube was, the capacity of evaporator cooling, compressor performance, and coefficient of performance (COP) of this system were also smaller. That condition would affect in higher cooling effect. In the shortest capillary tube variation which was 35cm, resulted total cooling capacity for 2,25 kW, compressor performance 0,433 kW, temperature entering evaporator 7,26°C, 5,21 of COP, and 1, 16 of HRR. In the longest capillary tube variation which was 95cm, the total cooling capacity was 0,72 kW, compressor performance 0,332 kW, temperature entering evaporator 1,64°C, 4,35 of COP, and 1,26 HRR.

Item Type: Thesis (Undergraduate)
Additional Information: RSM 621.402 2 Dar s
Uncontrolled Keywords: Refrigerasi, pipa kapiler, efisiensi, modifikasi pengkondisian udara
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ935 Pipe--Fluid dynamics.
T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL681.A5 Air conditioning (Aeronautics )
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: EKO BUDI RAHARJO
Date Deposited: 11 Jun 2020 03:19
Last Modified: 11 Jun 2020 03:19
URI: https://repository.its.ac.id/id/eprint/76140

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