Performance Analysis of a Small Refrigeration System in a 40ft Reefer Container and Simulation of The Refrigeration Cycle for Use in Teaching

Dewa, Anak Agung Madya Kusuma (2022) Performance Analysis of a Small Refrigeration System in a 40ft Reefer Container and Simulation of The Refrigeration Cycle for Use in Teaching. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

This research contains a simulation on a refrigeration plant for a performance analysis of a 40ft container cold storage. The system result is based on a certain input constant that affects the whole system. The result of the simulation based on different input constant resulted in a very different system behaviour. The refrigerant plant simulation will be done using SIMULINK with each component have a specific operational value. The main parameter of the cooling system such as cooling water inlet temperature, cooling water mass flow, evaporator temperature, compressor specification, and specification of the cold reservoir can be changeable. The refrigeration system modelling will take place in a 40ft container space with frozen fish as heat product. The total heat load of the model includes product heat load and wall heat load which will affect the system performance in terms of time for cooling. The refrigeration cycle simulation analyses the temperature, pressure, enthalpy, and entropy at a four given state which are before the compressor, after the compressor, after the condenser, and before the evaporator. Each state value will be gained from pressure-enthalpy diagram of a specific refrigerant, in this case R-134a will be used. The system is modelled using lookup tables and a calculation for the heat balance across the system. The compressor in the simulation will simulates the actual flow rate based on the performance of the refrigeration plant in terms of compression ratio. Increase in compression ratio will result in a lower flow rate and lower system performance overall. It must be underlined that this simulation is based on a vapor compression refrigeration cycle with ideal condition and no flow resistance. The result of the refrigeration cycle simulation should maintain a general rule of thumb of a P-h diagram and T-s diagram. The state of the refrigerant will affect the value of temperature, pressure, enthalpy, entropy, and volume in other region across the cycle. This result will then affect the compressor working performance in terms of refrigerant flow rate and finally affects the refrigeration cycle performance for cooling and heat rejection.
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Penelitian ini berisi simulasi pada sistem pendingin untuk analisis kinerja reefer container 40 kaki. Hasil sistem didasarkan pada konstanta input tertentu yang mempengaruhi keseluruhan sistem. Hasil simulasi berdasarkan konstanta input yang berbeda menghasilkan perilaku sistem yang sangat berbeda. Simulasi pembangkit refrigeran akan dilakukan menggunakan SIMULINK dengan masing-masing komponen memiliki nilai operasional tertentu. Parameter utama sistem pendingin seperti temperatur masuk air pendingin, aliran massa air pendingin, temperatur evaporator, spesifikasi kompresor, dan spesifikasi reservoir dingin dapat berubah-ubah. Pemodelan sistem pendingin akan berlangsung di ruang kontainer 40 kaki dengan ikan beku sebagai produk panas. Beban panas total model meliputi beban panas produk dan beban panas dinding yang akan mempengaruhi kinerja sistem dalam hal waktu pendinginan. Simulasi siklus refrigerasi menganalisis suhu, tekanan, entalpi, dan entropi pada empat keadaan tertentu yaitu sebelum kompresor, setelah kompresor, setelah kondensor, dan sebelum evaporator. Setiap nilai keadaan akan diperoleh dari diagram tekanan-entalpi refrigeran tertentu, dalam hal ini R-134a akan digunakan. Sistem dimodelkan menggunakan tabel pencarian dan perhitungan untuk keseimbangan panas di seluruh sistem. Kompresor dalam simulasi akan mensimulasikan laju aliran aktual berdasarkan kinerja pabrik refrigerasi dalam hal rasio kompresi. Peningkatan rasio kompresi akan menghasilkan laju aliran yang lebih rendah dan kinerja sistem yang lebih rendah secara keseluruhan. Harus digarisbawahi bahwa simulasi ini didasarkan pada siklus refrigerasi kompresi uap dengan kondisi ideal dan tidak ada hambatan aliran. Hasil simulasi siklus refrigerasi harus mempertahankan aturan umum diagram P-h dan diagram T-s. Keadaan refrigeran akan mempengaruhi nilai temperatur, tekanan, entalpi, entropi, dan volume pada daerah lain sepanjang siklus. Hasil ini kemudian akan mempengaruhi kinerja kerja kompresor dalam hal laju aliran refrigeran dan akhirnya mempengaruhi kinerja siklus refrigerasi untuk pendinginan dan pembuangan panas.

Item Type:	Thesis (Other)
Additional Information:	RSSP 623.853 5 Dew a-1 2022, - 3100022094512
Uncontrolled Keywords:	Refrigeration System, Container
Subjects:	T Technology > TP Chemical technology > TP492.3 Refrigeration and refrigerating machinery
Divisions:	Faculty of Marine Technology (MARTECH) > Marine Engineering > 36202-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	02 Mar 2026 03:32
Last Modified:	02 Mar 2026 03:32
URI:	http://repository.its.ac.id/id/eprint/132673

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