Akademik Məlumat İdarəetmə Sistemi
Acta Polytechnica Hungarica, vol.19, no.9, pp.239-249, 2022 (SCI-Expanded, Scopus)
This work focuses on the pressure drop of the cooled fluid in the shell side of the heat pump’s evaporator since the structures and the results obtained for the process characteristics of the models available in the literature show a significant standard deviation. Hence, the mathematical modeling and description of the heat pump is rather uncertain due to the inaccuracy of the functions describing the pressure drop. This research paper presents a new formula developed on the basis of the measurements, which can be used to calculate the pressure drop in the shell side of the heat pump evaporator with greater accuracy compared to the correlations found in the literature. The maximum discrepancy – from measurement values – of the values yielded by the pressure drop model with the new proposed correlation as set up by the author is ɛmax=5.72%, while the average discrepancy is only ɛ=2.58%. The presented new correlation was determined under the measuring conditions of 1-15 (m3/h), Re = 478-7175 (-) and 13-15 (°C).