Studi Variasi Laju Pengeluaran Kalor Kondensor High Stage Sistem Refrigerasi Casade Menggunakan Refrigeran MC22 Dan R404A Dengan Heat Exchanger Tipe Plate Heat Exchanger

Prihandani, Mohamad Fauzi (2015) Studi Variasi Laju Pengeluaran Kalor Kondensor High Stage Sistem Refrigerasi Casade Menggunakan Refrigeran MC22 Dan R404A Dengan Heat Exchanger Tipe Plate Heat Exchanger. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Dewasa ini kebutuhan akan makanan, minuman, bahan kimia, obat-obatan maupun produk lainnya menuntut adanya suatu pengembangan sistem pendinginan yang dapat memenuhi akan semua kebutuhan tersebut. Masih adanya kekurangan pada alat penukar panas tipe concentric tube yang digunakan pada sistem refrigerasi cascade sebelumnya, pada studi eksperimental ini dibuat kembali suatu sistem refrigerasi cascade dengan alat penukar panas tipe plate heat exchanger. Data didapatkan dengan melakukan pengujian pada peralatan sistem refrigerasi cascade menggunakan penukar panas intermediate tipe plate heat exchanger di laboratorium pendingin dan pengkondisian udara, dengan menggunakan refrigeran Musicool 22 di high-stage dan R404A di low-stage. Kemudian menghidupkan kompresor high-stage dan low-stage sampai kondisi steady state, lalu mengatur variasi laju pengeluaran kalor pada kondensor dengan mengatur kecepatan aliran udara yang melalui kondensor yaitu 0,7 m/s, 1,7 m/s, 2 m/s, 2,4 m/s, dan 2,8 m/s. Hasil yang didapatkan dari studi eksperimen ini adalah dengan bertambahnya laju pengeluaran kalor pada kondensor high-stage, temperatur dan tekanan kondensor high-stage semakin kecil. Hal ini mengakibatkan efek refrigerasi, kapasitas refrigerasi, dan koefisien prestasi akan semakin naik. Pada III variasi kecepatan fan tertinggi 2,8 m/s, coefficient of performance sistem sebesar 1,035, kapasitas refrigerasi sebesar 1,197 kW, heat rejection ratio sistem sebesar 1,966, temperatur evaporator LS sebesar , dan temperatur kabin terendah sebesar , dan nilai effectiveness alat penukar kalor tipe plate heat exchanger sebesar 97,81%,. ================================================================================================= Nowadays the need for foods, beverages, chemicals, pharmaceuticals and other products demand a development of the cooling system that can meet all of these requirements. There is still a deficit in concentric type heat exchanger tube used in the previous cascade refrigeration system, in this experimental study was change a cascade refrigeration system with plate heat exchangers-type. Data obtained by performing test from cascade refrigeration system with intermediate plate heat exchangers-type. in cooling system and air conditioning laboratory using refrigerant Musicool22 in high-stage and R404A in low-stage. Then, turn on the compressor high-stage and low-stage until steady state conditions. Adjust heat rejection rate variations in high-stage condenser.The condenser heat rejection rate by turning fan speed for air flow at 0.7 m / s, 1.7 m / s, 2 m / s, 2.4 m / s and 2.8 m / s. The results obtained from experimental study,with increase the heat rejection rate on condenser high-stage which is decreasing of temperature and pressure. The results increase refrigeration effects, refrigeration capacity and coefficient of performance. At the highest fan speed variation 2.8 m/s,effectiveness of concentric heat exchanger is 97.81%, COP of the system is 1.035, refrigeration capacity of the system is 1.197 V kW, HRR of the system is 1.966, low-stage evaporator temperature is -37.8oC, and the lowest cabin temperature is - 34.2oC.

Item Type: Thesis (Undergraduate)
Additional Information: RSM 621.402 5 Pri s
Uncontrolled Keywords: sistem cascade, plate heat exchanger, efek refrigerasi, effectiveness ,COP
Subjects: T Technology > TP Chemical technology > TP492.3 Refrigeration and refrigerating machinery
Divisions: Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User: Mr. Marsudiyana -
Date Deposited: 13 Dec 2019 09:06
Last Modified: 13 Dec 2019 09:06
URI: https://repository.its.ac.id/id/eprint/72371

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