Akademik Veri Yönetim Sistemi
INTERNATIONAL JOURNAL OF REFRIGERATION, cilt.150, sa.2, ss.135-148, 2023 (SCI-Expanded)
Hermetic reciprocating compressors consume the most electricity, and an improvement in compressor performance
has a direct impact on compressor efficiency. Valve motion and pressure pulsation should be precisely
predicted to assess the thermodynamic performance. In this paper, a three-dimensional fluid-structure interaction
model validated by experiments is developed to investigate the oscillation motion of the suction and
discharge reed valves, compression power, and mass flow rate of a hermetic reciprocating compressor operating
under ASHRAE (54.4 ◦C/-23.3 ◦C) at the speed of 2100 rpm and additional specific refrigerator operating
conditions such as (25 ◦C/-20 ◦C) and (40 ◦C/-25 ◦C) at the speeds of 1300 and 1600 rpms, respectively. Different
from the others, no prior study has explored the whole compression cycle, including all four essential phases by
showing the compressor’s pV and valve oscillation diagrams under these operating conditions. In addition, the
advanced mesh refinement method is computationally straightforward and has excellent numerical stability.
Using this method as the third one in the literature, the mesh structure of complex geometries is generated
without additional time or effort. Thus, the development of the model and the solution takes significantly less
time than with other methods. When the obtained numerical outputs using the RNG k-ε turbulence model and
experimental data are compared, the turbulence model is found to be reliable in the prediction of thermodynamic
performance and valve lift. The deviations between experimental and numerical outcomes are 1.79%, -0.6%, and
3.44% for compression power and -1.28%, 0.6%, and 2.44% for mass flow rate regarding ASHRAE and additional
operating conditions.