TY - JOUR
T1 - Experimental assessment of vapour adiabatic absorption into solution droplets using a full cone nozzle
AU - Zacarías, A.
AU - Venegas, M.
AU - Lecuona, A.
AU - Ventas, R.
AU - Carvajal, I.
N1 - Publisher Copyright:
© 2015 Elsevier Inc.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - This work investigates experimentally the adiabatic absorption of ammonia vapour into ammonia-lithium nitrate solution using a full cone nozzle and an upstream single-pass subcooler. Data are representative of the working conditions of adiabatic absorbers in absorption chillers. The nozzle was located at three different heights inside the absorption chamber, separated 0.165, 0.205 and 0.225. m from the bottom liquid surface. The diluted solution mass flow rate was modified between 0.04-0.08. kg/s and the solution inlet temperature between 23.5 and 30.6. °C. This paper analyzes the influence of these variables on the absorption ratio, mass transfer coefficient, outlet subcooling and approach to equilibrium factor. A linear relation between the inlet subcooling and the absorption ratio is observed. The approach to equilibrium factor for the conditions essayed is always between 0.64 and 0.87. Mass transfer coefficients and correlations for the approach to equilibrium factor and the Sherwood number are obtained. Results are compared with other ones reported in the literature.
AB - This work investigates experimentally the adiabatic absorption of ammonia vapour into ammonia-lithium nitrate solution using a full cone nozzle and an upstream single-pass subcooler. Data are representative of the working conditions of adiabatic absorbers in absorption chillers. The nozzle was located at three different heights inside the absorption chamber, separated 0.165, 0.205 and 0.225. m from the bottom liquid surface. The diluted solution mass flow rate was modified between 0.04-0.08. kg/s and the solution inlet temperature between 23.5 and 30.6. °C. This paper analyzes the influence of these variables on the absorption ratio, mass transfer coefficient, outlet subcooling and approach to equilibrium factor. A linear relation between the inlet subcooling and the absorption ratio is observed. The approach to equilibrium factor for the conditions essayed is always between 0.64 and 0.87. Mass transfer coefficients and correlations for the approach to equilibrium factor and the Sherwood number are obtained. Results are compared with other ones reported in the literature.
KW - Adiabatic absorption
KW - Ammonia-lithium nitrate solution
KW - Atomization
KW - Full cone nozzle
KW - Plate heat exchanger
UR - http://www.scopus.com/inward/record.url?scp=84929414156&partnerID=8YFLogxK
U2 - 10.1016/j.expthermflusci.2015.05.001
DO - 10.1016/j.expthermflusci.2015.05.001
M3 - Artículo
SN - 0894-1777
VL - 68
SP - 228
EP - 238
JO - Experimental Thermal and Fluid Science
JF - Experimental Thermal and Fluid Science
ER -