An absorption based miniature heat pump system for electronics cooling

Kim, Yoon Jo; Joshi, Yogendra; Fedorov, Andrei G.

doi:10.1016/j.ijrefrig.2007.07.003

Cited by 58 publications

(15 citation statements)

References 21 publications

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“…The aspect ratios and hydraulic diameters used in the present study are included in the validity ranges of the Lee and Garimella's correlation. Developed for laminar flow, condition that applies in the present work, the correlation of Shah and London has been previously used by some authors to predict the heat transfer performance in similar geometries of rectangular microchannels …”

Section: Microchannel Absorber Modelmentioning

confidence: 99%

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H₂ O, LiCl-H₂ O, and LiNO₃ -NH₃

2018

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Summary In order to develop compact absorption refrigeration cycles driven by low heat sources, the simulated performance of a microchannel absorber of 5‐cm length and 9.5 cm3 in volume provided with a porous membrane is presented for 3 different solution‐refrigerant pairs: LiBr‐H2O, LiCl‐H2O, and LiNO3‐NH3. The high absorption rates calculated for the 3 solutions lead to large cooling effect to absorber volume ratios: 625 kW/m3 for the LiNO3‐NH3, 552 kW/m3 for the LiBr‐H2O, and 318 kW/m3 for the LiCl‐H2O solutions given the studied geometry. The performance of a complete absorption system is also analyzed varying the solution concentration, condensation temperature, and desorption temperature. The LiNO3‐NH3 and the LiBr‐H2O solutions provide the largest cooling effects. The LiNO3‐NH3 can work at a lower temperature of the heating source, in comparison with the one needed in a LiBr‐H2O system. The lowest cooling effect and coefficient of performance are found for the LiCl‐H2O solution, but this mixture allows the use of lower temperature heating sources (below 70°C). These results can be used for the selection of the most suitable solution for a given cooling duty, depending on the available heat source and condensation temperature.

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Section: Microchannel Absorber Modelmentioning

confidence: 99%

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H₂ O, LiCl-H₂ O, and LiNO₃ -NH₃

2018

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“…Moreover, like any electronic device, electronic-driven-sun-tracking systems are naturally sensitive to temperature increase (Kim, Joshi, & Fedorov, 2008;Wang & Chen, 2009), foretells risks of premature system's failure. The reliability of sun-tracking systems is put in doubt as they can only withstand minor mechanical stresses.…”

Section: Disadvantages Of Sun-tracking Systemsmentioning

confidence: 99%

Study and Modelling of Factors Drivingthe Performance of Solar Modules

Kamanzi

Sibanda

2017

JGE

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Optimal exploitation of the costless and self-sustaining solar energy has been a concern of much research in response to pressuring energy demands in one hand and the effects of relying on energy sources which are harmful to the humans and the environment on the other hand. The conversion efficiencies of photovoltaics (PVs) as well as their production costs have therefore been research targets. However, factors such as unsatisfactory exposure to the available sunlight, weather-dependence of the sunlight and shading, temperature rise at cells' junctions as well as manufacture related-defects still remain major causes of PVs' underperformance which manifests in lower levels of output power and efficiency. The dynamics of the output power or current with respect to the potential differences at cells' junctions are usually graphically illustrated with two-axis plots, which imply that only two parameters get evaluated against each other at a time.In this paper, three-axis plots were further used to evaluate the output parameters with respect to a simultaneous change of any other two parameters involved in the model of the PV cells; which gives a more realistic and comprehensive picture of the performance of PV cells. In addition, causes affecting the output and efficiency levels of cells are critically reviewed

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“…Kim et al [62] analysed an absorption based miniature heat pump system and demonstrated with analytical results the feasibility of such a system for electronic cooling applications. To miniaturize the system, they integrated the desorber and condenser as a single unit separated by a hydrophobic membrane which acted as a common interface to separate the refrigerant vapour from the absorbent solution.…”

Section: Desorbermentioning

confidence: 99%

“…Kim et al [62] proposed an absorption refrigeration system which could be fitted into a small scale envelope for electronic cooling. Conventional absorption refrigeration is too bulky for the electronic system cooling therefore the concept of a combined micro-channel condenser and desorber was proposed as shown in Fig.…”

Section: Influence Of Membrane Contactors On the Cycle Configurationmentioning

confidence: 99%

A review of membrane contactors applied in absorption refrigeration systems

Asfand

Bourouis

2015

Renewable and Sustainable Energy Reviews

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An absorption based miniature heat pump system for electronics cooling

Cited by 58 publications

References 21 publications

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H₂ O, LiCl-H₂ O, and LiNO₃ -NH₃

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H₂ O, LiCl-H₂ O, and LiNO₃ -NH₃

Study and Modelling of Factors Drivingthe Performance of Solar Modules

A review of membrane contactors applied in absorption refrigeration systems

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An absorption based miniature heat pump system for electronics cooling

Cited by 58 publications

References 21 publications

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H2 O, LiCl-H2 O, and LiNO3 -NH3

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H2 O, LiCl-H2 O, and LiNO3 -NH3

Study and Modelling of Factors Drivingthe Performance of Solar Modules

A review of membrane contactors applied in absorption refrigeration systems

Contact Info

Product

Resources

About

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H₂ O, LiCl-H₂ O, and LiNO₃ -NH₃

Modeling and performance analysis of an absorption chiller with a microchannel membrane-based absorber using LiBr-H₂ O, LiCl-H₂ O, and LiNO₃ -NH₃