Akademik Veri Yönetim Sistemi
13th International Conference on Compressors and their Systems, London, İngiltere, 11 - 13 Eylül 2023, ss.445-455
The incorporation of inverter technology into hermetic reciprocating
compressors has led to a significant decrease in energy consumption. However, to
ensure efficient operation of the compressor components at varying rotation speeds,
new optimizations are required. Discharge valves are one of the components most
affected by high and low rotational speeds. Since the opening forces on the valves are
high at high rotational speeds, they open and close properly, while flutter movements
occur at lower rotational speeds. These flutter movements increase the discharge
losses. Therefore, the movements of the discharge valves and the geometric features
of the limiter, which restricts valve movement, play crucial roles in determining the
discharge line losses and overall compressor efficiency. Variables such as the forces
acting on the valve and the mass flow area are closely related with the maximum
displacement of the discharge valve limited by the limiter. This study aims to prevent
flutter movements and increase hermetic reciprocating compressor used in refrigerators efficiency by modifying the limiter geometric features. The results in working
conditions of different condensation and evaporation temperatures at different rotation speeds, which were examined experimentally and numerically, are shared. Additionally, by utilizing a 1-D model solver, the compressor’s efficiency is analyzed
parametrically. The results indicate that reducing the limiter distance yields better
outcomes at low rotation speeds in the higher compression ratio condition compared
to lower compression ratio conditions and higher rotation speeds.