STUDI EKSPERIMEN PERFORMA SISTEM PENDINGIN ABSORPSI MENGGUNAKAN REFRIGERAN AIR

KAUTSAR RAIHANANTO, . (2025) STUDI EKSPERIMEN PERFORMA SISTEM PENDINGIN ABSORPSI MENGGUNAKAN REFRIGERAN AIR. Sarjana thesis, UNIVERSITAS NEGERI JAKARTA.

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Abstract

Sistem pendingin absorpsi merupakan salah satu teknologi pendinginan yang ramah lingkungan dikarenakan memanfaatkan panas sebagai sumber energi utama dan menggunakan refrigeran yang tidak merusak lingkungan (environment friendly refrigerants). Sistem pendingin absorpsi tidak menggunakan komponen kompresor seperti pada sistem pendingin kompresi uap melainkan menggunakan generator dan absorber sebagai penggantinya. Dalam penelitian ini refrigeran yang digunakan adalah H2O (water). Tujuan dari penelitian ini yaitu merancang sistem pendingin absorpsi untuk diaplikasikan pada kabin kendaraan mobil, serta menganalisis performanya berdasarkan variasi temperatur generator. Penelitian dilakukan secara eksperimen dan dianalisis menggunakan bantuan software Engineering Equation Solver (EES). Hasil penelitian menunjukkan bahwa sistem pendingin absorpsi menggunakan refrigeran air berhasil dibuat dan berfungsi sebagai sistem pendingin berbasis panas. Variasi temperatur generator dengan waktu penahanan pemanasan memengaruhi tekanan keluaran menuju input kondensor, di mana semakin tinggi temperatur generator menyebabkan peningkatan tekanan sistem. Selain itu, semakin besar selisih temperatur antara generator dan lingkungan (ΔT) menyebabkan peningkatan heat loss, sehingga tidak seluruh energi panas tersalurkan menuju input kondensor. Nilai Coefficient of Performance (COP) yang diperoleh berturut-turut pada variasi temperatur generator 70°C, 80°C, dan 90°C adalah 0,927, 0,906, dan 0,905. Nilai Coefficient of Performance (COP) sistem pendingin absorpsi menggunakan refrigeran air menurun seiring dengan peningkatan temperatur generator, hal ini disebabkan oleh meningkatnya kebutuhan energi panas di dalam generator. Kata kunci: analisis EES, coefficient of performance, refrigeran air, sistem pendingin absorpsi, temperatur generator *****The absorption refrigeration system is recognized as an environmentally friendly cooling technology because it utilizes heat as the primary energy source and employs refrigerants that do not contribute to environmental degradation. Unlike the conventional vapor compression system that relies on a mechanical compressor, the absorption system replaces this component with a generator and an absorber. In this research, water (H₂O) was used as the working refrigerant. The objective of the study is to design an absorption refrigeration system suitable for application in vehicle cabins and to analyze its performance under varying generator temperatures. The study was conducted experimentally and analyzed using the Engineering Equation Solver (EES) software. The experimental results demonstrated that the absorption refrigeration system using water as the refrigerant was successfully developed and operated effectively as a heat-driven cooling mechanism. Variations in generator temperature and heating retention time significantly influenced the output pressure directed toward the condenser inlet, where higher generator temperatures resulted in increased system pressure. Moreover, a greater temperature difference between the generator and the surrounding environment (ΔT) led to higher heat losses, indicating that not all heat energy was effectively transferred to the condenser. The Coefficient of Performance (COP) values obtained at generator temperatures of 70°C, 80°C, and 90°C were 0.927, 0.906, and 0.905, respectively. The decrease in COP with increasing generator temperature was attributed to the higher thermal energy required within the generator to sustain the absorption process.***** Keywords: absorption refrigeration system, coefficient of performance, EES analysis, generator temperature, water refrigerant

Item Type:	Thesis (Sarjana)
Additional Information:	1). Dr. Darwin Rio Budi Syaka, M.T. 2). Nugroho Gama Yoga, M.T.
Subjects:	Teknologi dan Ilmu Terapan > Teknik Mesin, Mekanika Teknik
Divisions:	FT > S1 Teknik Mesin
Depositing User:	KAUTSAR RAIHANANTO .
Date Deposited:	13 Nov 2025 02:54
Last Modified:	13 Nov 2025 02:54
URI:	http://repository.unj.ac.id/id/eprint/62810

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