Studi Eksperimen Menggunakan Variasi Alat Ekspansi Thermostatic Expansion Valve (TXV)dan Pipa Kapiler Terhadap Performansi Sistem Water chiller

Wardoyo, Ibnu (2018) Studi Eksperimen Menggunakan Variasi Alat Ekspansi Thermostatic Expansion Valve (TXV)dan Pipa Kapiler Terhadap Performansi Sistem Water chiller. Undergraduate thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Water chiller (air pendingin) telah menjadi kebutuhan umum pada gedung-gedung perkantoran dan mal-mal di kota-kota besar dikarenakan water chiller water lebih effisien dibandingkan ac split. Pengkondisi udara sangat diperlukan karena Indonesia memiliki iklim tropis dan kondisi udara yang cenderung lembab.Prinsip kerja chiller water sama denga sistem refrigrasi. water chiller water merupakan air dingin yang dihasilkan oleh mesin pendingin (mesin chiller) untuk di distribusikan ke unit-unit mesin AHU (air handling unit). Performa sistem di chiller water dinyatakan dalam nilai COP, untuk meningkatkan nilai dari COP dalam sistem chiller water dengan cara memodifikasi alat ekpansi yaitu menggunakan Thermostatic Expansion Valve (TXV) dan pipa kapiler. Pada sistem chiller water ini penguji menggunakan sistem pendingan air yang dialirkan ke evaporator yang ada di dalam drum (bak) melalui pompa sentrifugal, dan beban pendinginan pendinginan penguji menggunakan drum (bak) yang satunya yang berisi heater untuk memanaskan air di dalamnya. Eksperimen ini menguji sebrapa jauh pengaruh alat ekspansi yang digunakan yaitu automatic expansion valve (TXV) dan pipa kapiler untuk mengetahui nilai COP dalam satu sistem. Alat dan bahan yang digunakan pada saat pengujian diantara lain pressure gauge, flowmeter, refrigran R-22, termokopel dan perangkat data akuisisi. Pengambilan data dilakukan dengan variasi alat ekpansi automatic expansion valve (TXV) dan pipa kapiler dengan beban temperatur air yang sudah dipanaskan dengan heater dengan suhu 25 °C, 35 °C dan 45 °C. Pada setiap variasi, pengambilan dilakukan selama 1 jam dengan interval waktu 5 menit. Hasil dari eksperimen water chiller dengan variasi alat ekspansi membuktikan bahwa pengguna alat ekspansi Thermostatic Expansion Valve (TXV) lebih baik dari alat ekspansi pipa kapiler dinyatakan dalam nilai COP. Nilai COP elektik penggunaan TXV sebesar 2,434 pada beban low (30 ̊ C), beban medium (35 ̊C) sebesar 2,838 dan beban high (40 ̊C) sebesar 3,251 untuk penggunaan alat ekspansi pipa kapiler untuk beban low (30 ̊C) sebesar 2,376 , beban medium (35 ̊C) sebesar 2,377 dan beban high (40 ̊C) sebesar 2,389 ============= Water chiller (cooling water) has become a common requirement in office buildings and malls in big cities because water chiller water is more efficient than ac split. Air conditioning is very necessary because Indonesia has a tropical climate and air conditions tend to be moist. The working principle of chiller water is the same as the refrigration system. water chiller water is cold water produced by cooling machine (chiller machine) to distribute to AHU machine units (air handling unit). The performance of the system in chiller water is expressed in COP value, to increase the value of COP in the chiller water system by modifying the expansion means using Thermostatic Expansion Valve (TXV) and capillary tube. In this chase, Chiller water system used water cooling system that flows to the existing evaporator in the drum (tub) through a centrifugal pump, and the cooling load of the testers uses the only drum that contains the heater to heat the water in it. This experiment extent of the expansion valve used (TXV) and capillary tube to determine the value of COP in one system. Tools and materials used at the time of testing among other pressure gauge, flowmeter, refrigran R-22, thermocouple and data acquisition devices. The data were collected by variation of expansion valve expansion valve (TXV) and capillary tube with load of heated water temperature with heater with temperature 25 ° C, 35 ° C and 45 ° C. Each variation takes 1 hour with a time interval of 5 minutes. Results from water chiller experiments with a variety of expansion tools prove that used Thermostatic Expansion Valve (TXV) expansion tools are better than capillary expansion tools expressed in COP values. The value of COP electronics use TXV of 2,434 at low load (30 ̊ C), medium load (35 ̊ C) of 2,838 and high load (40 ̊ C) of 3.251 for the use of capillary expansion tool for low load (30 ̊ C) of 2.376, medium load (35 ̊ C) of 2.377 and high load (40 ̊ C) of 2.389.

Item Type: Thesis (Undergraduate)
Uncontrolled Keywords: Refrigerant; COP; Evaportor load; Expantion tools; Refrigeran; Beban Evaporator; Alat ekspansi
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 > TP Chemical technology > TP492.3 Refrigeration and refrigerating machinery
Divisions: Faculty of Industrial Technology > Mechanical Engineering > (S1) Undergraduate Theses
Depositing User: Ibnu Wardoyo
Date Deposited: 06 Mar 2018 02:00
Last Modified: 06 Mar 2018 02:00
URI: http://repository.its.ac.id/id/eprint/50335

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