Experimental assessment of ammonia adiabatic absorption into ammonia–lithium nitrate solution using a flat fan nozzle

Convective heat transfer characteristics of LiNO3–NH3 solution with low Re in a chevron plate solution cooler

“…The experimental overall heat transfer coefficient (k) in this work is also larger than that reported by Zacarías et al [18]. In Ref.…”

“…Taking into account of this and the synthetic effects of different heat exchanger parameters and working conditions, it is reasonable that the k in this work is 1.81e4.49 times of that in Ref. [18]. Both of the results of [18] and this work show that the plate-type solution cooler equipped to an adiabatic spray absorber has acceptable overall heat transfer coefficient.…”

“…The maximum flow rates of water and solution in this work are 4.97 and 3.43 times of those in Ref. [18], respectively. Taking into account of this and the synthetic effects of different heat exchanger parameters and working conditions, it is reasonable that the k in this work is 1.81e4.49 times of that in Ref.…”

“…[18], the overall heat transfer coefficient (k) of LiNO 3 eNH 3 solution in a plate subcooler equipped to an adiabatic spray absorber was investigated on the following conditions: 1) solution temperatures at the inlet and outlet of the subcooler varied from 50 to 70 C and 24e30 C, respectively; 2) inlet and outlet water temperatures varied from 9 to 19 C and 36e56 C, respectively; 3) solution mass flow rate were given as 0.04, 0.06, and 0.08 kg/s; 4) water mass flow rate varied from 0.05 to 0.13 kg/s. When Re varied in the range of 6e16, the value of k presented by Zacarías et al [18] varied from 113 to 525 W/m 2 C. The smaller k of [18] may be caused by the relatively lower flow rates and Reynolds numbers. The maximum flow rates of water and solution in this work are 4.97 and 3.43 times of those in Ref.…”

Performance of Different Experimental Absorber Designs in Absorption Heat Pump Cycle Technologies: A Review

“…A significant reduction in the absorber size (up to 50%) is possible. Zacarías et al [32] carried out an experimental evaluation of the adiabatic absorption of ammonia vapour into ammonia/lithium nitrate solution using a flat fan nozzle; the model was ¼-H-VV-SS 65 06 made by Spraying Systems Co™, with the following characteristics: equivalent hole diameter 1.5 mm, atomization angle 54° and capacity from 1.7 L/min to 2.4 L/min. The mass transfer coefficients achieved were from 3.40 × 10 .…”