TY - JOUR
T1 - Shell-and-tube evaporator model performance with different two-phase flow heat transfer correlations. Experimental analysis using R134a and R1234yf
AU - Navarro-Esbrí, Joaquín
AU - Molés, Francisco
AU - Peris, Bernardo
AU - Barragán-Cervera, Ángel
AU - Mendoza-Miranda, Juan Manuel
AU - Mota-Babiloni, Adrián
AU - Belman, Juan Manuel
PY - 2014
Y1 - 2014
N2 - This work presents a model of a shell-and-tube evaporator using R1234yf and R134a as working fluids. The model uses the effectiveness-NTU method to predict the evaporation pressure and the refrigerant and secondary fluid temperatures at the evaporator outlet, using as inputs the geometry of the evaporator, the refrigerant mass flow rate and evaporator inlet enthalpy, and the secondary fluid volumetric flow rate and evaporator inlet temperature. The model performance is evaluated using different two-phase flow heat transfer correlations through model outputs, comparing predicted and experimental data. The output parameter with maximum deviations between the predicted and experimental data is the evaporating pressure, being the deviations in outlet temperatures less than 3%. The evaporator model using Kandlikar's correlation obtains the highest precision and the lowest absolute mean error, with 4.87% in the evaporating pressure, 0.45% in the refrigerant outlet temperature and 0.03% in the secondary fluid outlet temperature.
AB - This work presents a model of a shell-and-tube evaporator using R1234yf and R134a as working fluids. The model uses the effectiveness-NTU method to predict the evaporation pressure and the refrigerant and secondary fluid temperatures at the evaporator outlet, using as inputs the geometry of the evaporator, the refrigerant mass flow rate and evaporator inlet enthalpy, and the secondary fluid volumetric flow rate and evaporator inlet temperature. The model performance is evaluated using different two-phase flow heat transfer correlations through model outputs, comparing predicted and experimental data. The output parameter with maximum deviations between the predicted and experimental data is the evaporating pressure, being the deviations in outlet temperatures less than 3%. The evaporator model using Kandlikar's correlation obtains the highest precision and the lowest absolute mean error, with 4.87% in the evaporating pressure, 0.45% in the refrigerant outlet temperature and 0.03% in the secondary fluid outlet temperature.
KW - Evaporator model
KW - R1234yf
KW - R134a
KW - Shell-and-tube heat exchanger
KW - Two-phase flow heat transfer correlations
UR - http://www.scopus.com/inward/record.url?scp=84885367321&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2013.09.009
DO - 10.1016/j.applthermaleng.2013.09.009
M3 - Artículo
SN - 1359-4311
VL - 62
SP - 80
EP - 89
JO - Applied Thermal Engineering
JF - Applied Thermal Engineering
IS - 1
ER -