2016
DOI: 10.1016/j.ijrefrig.2015.11.016
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Low-source-temperature diffusion absorption refrigeration. Part II: Experiments and model assessment

Abstract: The diffusion absorption refrigeration cycle can enable passive fully thermally activated refrigeration for off-grid applications. In the accompanying paper, a new system configuration was proposed that employs alternate working fluids (NH 3 -NaSCN-He), a coupling-fluid heated bubble-pump generator, and an enhanced absorber. Detailed component and system level models were formulated for this design. In Part II of this work, the subject of this paper, these results are applied to implement a complete low-source… Show more

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Cited by 21 publications
(8 citation statements)
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“…In case of the DAR system with NH3-NaSCN-He the mass flow rates ratio can be calculated from the values of mass flow rates reported by Rattner et al [5,6]. Indeed, Rattner et al [6] estimate that the refrigerant ̇ and inert gas ̇ mass flow rates range respectively from 2.5-4.2 g /min and 25-41 g /min, which gives a mass flow rates ratio around 10, which is close to the value calculated from Eq. 8 and displayed in Table 1.…”
Section: Resultsmentioning
confidence: 99%
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“…In case of the DAR system with NH3-NaSCN-He the mass flow rates ratio can be calculated from the values of mass flow rates reported by Rattner et al [5,6]. Indeed, Rattner et al [6] estimate that the refrigerant ̇ and inert gas ̇ mass flow rates range respectively from 2.5-4.2 g /min and 25-41 g /min, which gives a mass flow rates ratio around 10, which is close to the value calculated from Eq. 8 and displayed in Table 1.…”
Section: Resultsmentioning
confidence: 99%
“…It used the propane / n-nonane as working fluid and hydrogen as inert gas. The fourth DAR system was studied by Ratther et al [6] and used the ammonia / sodium thiocyanate as working fluid and helium as inert gas.…”
Section: Applicationsmentioning
confidence: 99%
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“…Experimentally the system worked for evaporation temperature of 6 o C to 3 o C and refrigeration COP of 0.06. Internal COP was 30 % higher than external [28]. The mixture could work for generation temperature between 115-135 o C and can achieve COP of 0.1-0.45.…”
Section: Literature Reviewmentioning
confidence: 93%
“…Acuna et al [31] used a numerical modelling approach to investigate sodium thiocyanate (NaSCN) and lithium nitrate (LiNO 3 ) as alternative absorbents in combination with ammonia as the refrigerant and helium as the auxiliary gas. Both absorbents were predicted to give a higher COP than water at lower generator temperatures, with LiNO 3 showing the highest COP of 0.48 at a generator temperature of 120 • C. NaSCN was later investigated experimentally by Rattner and Garimella [32][33][34], with a novel bubble pump configuration featuring a co-flow heat source fluid channel to achieve a higher generator heat transfer area and thus enabling lower heat source temperatures. A COP of up to 0.14 was achieved at evaporator temperatures representative of air-conditioning applications (8-12 • C).…”
Section: Introductionmentioning
confidence: 99%