Studi Eksperimen Pengaruh Penambahan Nanofluids pada Pelumas Kompresor Terhadap Peningkatan Performa Mesin Pengkondisian Udara

Fauzan, Akhmad Faqih (2018) Studi Eksperimen Pengaruh Penambahan Nanofluids pada Pelumas Kompresor Terhadap Peningkatan Performa Mesin Pengkondisian Udara. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

[img] Text
2115105023-Undergraduate_Theses.pdf
Restricted to Repository staff only

Download (6MB) | Request a copy

Abstract

Pada tahun 2015, konsumsi tenaga listrik nasional adalah sebesar 232.520,00 MWh, dengan kontribusi sektor rumah tangga mencapai 44%. Hal ini disebabkan oleh peningkatan pemanfaatan energi listrik seiring dengan meningkatnya pertumbuhan penduduk dan perkembangan teknologi alat rumah tangga, salah satunya adalah mesin pengkondisi udara (air conditioning unit, AC). AC digunakan untuk mengatur kondisi udara di dalam ruangan agar penghuni di dalamnya merasa nyaman. AC yang paling umum digunakan adalah AC split yang terdiri dari empat komponen dasar sistem refrigerasi siklus kompresi uap, yaitu kompresor, kondensor, alat ekspansi, dan evaporator. Performa AC digambarkan oleh nilai COP, yaitu perbandingan dari efek refrigerasi yang dihasilkan evaporator dengan kerja kompresor.Salah satu metode untuk meningkatkan performa AC tanpa memodifikasi alat adalah dengan pengaplikasian nanofluis ke dalam pelumas AC. Alat dan bahan yang digunakan dalam penelitian ini antaralain AC split, refrigeran hidrokarbon, pelumas sintetis jenis polyolester (POE) oil, dan nanofluids. AC split yang tersusun dari sebuah indoor unit dan outdoor unit dirangkai dengan TXV (thermostatic expansion valve), inverter, serta alat ukur berupa flowmeter, termokopel, dan pressure gauge. Pengambilan data iidilakukan dengan menggunakan volume nanofluids 0 ml, 10 ml, dan 20 ml, variasi beban evaporator (low, medium, high), dan putaran kompresor (50 Hz dan 45 Hz). Pada setiap variasi, pengambilan data dilakukan selama satu jam dengan interval 5 menit. Hasil penelitian menunjukkan bahwa aplikasi nanofluids memberikan pengaruh signifikan terhadap performa AC. Penambahan 10 ml nanofluids mengakibatkan peningkatan COP sebesar 2.39% dan kapasitas evaporator sebesar 1.35% pada beban high, serta penurunan HRR sebesar 1.03% pada beban high. Aplikasi nanofluids juga memberikan pengaruh yang signifikan terhadap kompresor AC. Penambahan 10 ml nanofluidsjuga mengakibatkan penurunan kerja kompresor sebesar 3.55% pada beban high dan daya listrik sebesar 4.39% pada beban low, serta peningkatan efisiensi isentropis kompresor sebesar 3.46% pada beban high. Di samping itu, penurunan frekuensi listrik mempengaruhi penurunan nilai COP. ================================================================================================================= In the 2015, national electricity consumption reached 232,520.00 MWh, with the contribution of the household sector 44%. This is due to the increased utilization of electrical energy along with population growth and the development of household appliances technology, including air conditioning machine (air conditioning unit, AC). AC regulates the air condition inside the room for the occupants to feel comfortable. The most common AC used is split AC consisting of four basic components of the vapor compression refrigeration cycle system; compressors, condensers, expansion devices, and evaporators. AC performance is represented by COP value, which is the comparison of refrigeration effect generated by evaporator with compressorwork. One of the methods to improve AC performance without modifying the tool is by the application of nanofluids into AC lubrication. Tools and materials for this research are split AC, hydrocarbon refrigerant, polyolester synthetic lubricant (POE) oil, and nanofluids. Split AC composed of an indoor unit and outdoorunit coupled with TXV (thermostatic expansion valve), inverter,and measuring instruments such as flowmeter, thermocouple, and pressure gauge. The data were collected using nanofluids volume 0 ml, 10 ml, and 20 ml, variation of evaporator load (low, ivmedium, high), and compressor rotation (50 Hz and 45 Hz). At each variation, data retrieval is performed for one hour with 5 min intervals. The results showed that nanofluids application had significant effects on AC performance. The addition of 10 ml ofnanofluid leads to 2.39% increase in COP and evaporator capacity of 1.35% at high load, as well as 1.03% decrease in HRR at high loads. Applications of nanofluids also had significant effect on AC compressors. The addition of 10 ml nanofluid leadsto 3.55% reduction in compressor work at high load and 4.39% electrical power at low load, as well as increase in compressor isentropic efficiency by 3.46% in medium load. In addition,decreasing electricity frequency also decline COP values.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Compressor, Refrigerant, COP, Nanofluids
Subjects: T Technology > TJ Mechanical engineering and machinery > TJ164 Power plants--Design and construction
T Technology > TJ Mechanical engineering and machinery > TJ785 Internal combustion engines
T Technology > TJ Mechanical engineering and machinery > TJ810.5 Solar energy
Divisions: Faculty of Industrial Technology > Mechanical Engineering > (S1) Undergraduate Theses
Depositing User: Akhmad Faqih Fauzan
Date Deposited: 03 Apr 2018 02:01
Last Modified: 04 Apr 2018 03:16
URI: http://repository.its.ac.id/id/eprint/50315

Actions (login required)

View Item View Item