Thermodynamic Analyses of Multiple Evaporators Vapor Compression Refrigeration Systems With R410a, R290, R1234yf, R502, R404a, R152a and R134a

Abstract

In this paper, comparative thermodynamic analysis of system-1 (multiple evaporators and compressors with individual expansion valves) and system-2 (multiple evaporators and compressors with multiple expansion valves) has been presented which is based on energy and exergy principles. The comparison of systems-1 and -2 using ecofriendly R410A, R290, R1234YF, R502, R404A, R152A and R134A refrigerants was done in terms of COP (energetic e±ciency), exergetic e±ciency and system defect. Numerical model has been developed for systems-1 and -2 for¯nding out irreversibility and it was observed that system-2 is better system in comparison with system-1 for selected refrigerants. It was also found that R152a shows better performances than other considered refrigerants for both systems.

Analisis Energi pada Mesin Pembeku Sebelum dan Setelah Penambahan Receiver

“…Penelitian menganalisis parameter kinerja seperti generasi entropi, COP, dan efisiensi berlanjutan diselidiki pada kondisi lingkungan yang berbeda telah dilakukan oleh Chopra et al [1], dengan menggunakan tiga refrigerant yang ramah ozon hydrofluorocarbon (HFC) dan refrigeran (R32, R134a dan R152a), penelitian dengan R600a dan R234a dilakukan oleh Joybari et al [9], Pottkera at al. [10] melakukan penelitian dengan R410a dalam sistem refrigerasi kompresi uap.…”

The Effect of Receiver on the Performance of Freezer

“…Penelitian tentang kinerja kebangkitan entropi, COP, dan efisiensi yang berlanjutan telah dilakukan oleh Chopra et al (2014). Bolaji et al (2011) melakukan analisis kapasitas pendinginan dengan injektor pada katup ekspansi konvensional dan hasilnya menunjukkan bahwa pengaturan injektor dapat meningkatkan COP.…”

CO2 hydrate cooling system and LCC analysis for energy transportation application

“…Therefore, the Montreal Protocol was agreed and entered into force by many countries. At present, the first generation natural refrigerants were revived and alternative refrigerants are being actively researched [6][7]. The alternative refrigerants must be environment-friendly while having excellent thermophysical characteristics.…”