Mesin slush ice yang ada di pasaran umumnya menggunakan sistem refrigerasi kompresi uap dengan metode direct cooling. Pada tugas akhir ini mesin slush ice dibuat menggunakan metode indirect cooling dengan propylene glycol sebagai refrigeran sekunder. Kemudian dilakukan uji performansi terhadap mesin slush ice. Dilakukannya uji performansi agar dapat diketahui seberapa baik performansi sistem tersebut. Untuk melakukan uji performansi, data-data yang perlu dikumpulkan berupa data mengenai tekanan kerja dan temperatur-temperatur pada sistem. Pengambilan data dilakukan dengan metode produksi dengan 4 kali panen produk. Kemudian dari data tersebut dilakukan pengolahan data sehingga didapatkan nilai COPaktual sebesar 3,283, COPcarnot sebesar 4,724, efisiensi sistem sebesar 69,5% yang merupakan gambaran mengenai performansi dari sistem. Selain itu, didapatkan juga chilling time rata-rata dari setiap panen 46,5 menit, daya listrik rata-rata sistem 239 Watt, serta konsumsi energi listrik yang digunakan sistem selama 295 menit adalah sebesar 0,765 kWh. Kata Kunci: Sistem Refrigerasi, Mesin Slush Ice, Uji Performansi, COP, efisiensi.

The slush ice machine on the general market uses a vapor compression refrigeration system with a direct cooling method. In this final project the slush ice machine is made using an indirect cooling method with propylene glycol as a secondary refrigerant. Then a performance test was performed on the ice slush machine. Performance tests are needed in order to know the system's performance well. To perform performance tests, the data that needs to be collected is in the form of data about work and temperature on the system. The data was taken by using production method with 4 times product harvests. Then the data is proceed and obtained the COPactual value is 3.283, COPcarnot is 4.724, system efficiency is 69.5% which is a description of the performance of the system. In addition, the average chilling time from every harvests was 46.5 minutes, average electric power of the system is 239 Watt, and the electricity consumption used by the system for 295 minutes was 0.765 kWh. Keywords: Refrigeration System, Slush Ice Machine, Performance Test, COP, efficiency.

http://digilib.polban.ac.id/gdl.php?mod=browse&op=read&id=jbptppolban-gdl-erlindanad-12096