PERFORMANCE SIMULATION AND CREATION OF REFRIGERATION-EJECTOR CYCLE SIMULATOR SOFTWARE FOR VEHICLE AIR CONDITIONING SYSTEM

• Main Author: Primansyah, Galih
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/51081
• Institution: Institut Teknologi Bandung

The transportation sector occupies the second position as the sector with the highest level of energy consumption. The refrigeration-ejector cycle was created as an energy saving measure in the transportation sector. The types of refrigeration-ejector cycles are the refrigeration-ejector cycle with a separator, the COS type (Condenser Outlet Split), the DOS type (Diffuser Outlet Split), and the multicompressor type. Simulations were carried out using EJECs Thermo-Cycle Simulator 1.0 software. The simulation is a simulation of the parameters of the type of cycle and type of refrigerant and a simulation of operating parameters. Simulations are carried out to get the best type of cycle and refrigerant and to determine the correlation between operating parameters and performance parameters (COP, compressor power, and exergy efficiency). The refrigerants used in the simulation are R-134a, R-152a, R-1234ze(E), R-1234yf, and R-22. The simulation results show that the DOS and COS type refrigeration-ejector cycles are the cycles with the best COP performance and compressor power. However, in terms of exergy efficiency, the refrigeration-ejector cycle with the separator is the cycle with the best performance. The simulation also shows that R-152 refrigerant is a refrigerant with COP performance, compressor power and exergy efficiency. In addition, compressor efficiency and evaporator temperature have a positive effect on COP and exergy efficiency. Condenser temperature has a negative effect on COP and a positive influence on compressor power and system exergy efficiency. The heat exchanger pressure has a fluctuating effect on the performance parameters. The cooling load has no effect on all performance parameters except compressor power.