Development of New Composite Beds for Enhancing the Heat Transfer in Adsorption Cooling Systems

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27650%2F24%3A10257032" target="_blank" >RIV/61989100:27650/24:10257032 - isvavai.cz</a>

Result on the web

<a href="https://www.mdpi.com/1996-1073/18/3/584" target="_blank" >https://www.mdpi.com/1996-1073/18/3/584</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/en18030584" target="_blank" >10.3390/en18030584</a>

Result language

angličtina

Original language name

Development of New Composite Beds for Enhancing the Heat Transfer in Adsorption Cooling Systems

Original language description

Adsorption chillers are distinguished by their low electricity consumption, lack of moving parts and exceptional reliability. However, their considerable weight, due to the low sorption capacity of conventional adsorbents, remains a key limitation. This study investigates the effect of introducing thermally conductive additives-aluminium powder, copper powder and graphite flakes-at 5, 15 and 25 wt.% to silica-gel-based adsorbent beds on the enhancement of heat transfer. In contrast to other works, this study also includes a novel analysis of the thermal properties of dry sorbents, since the moisture content affects the thermal conductivity. Additives improve the thermal conductivity, as measured by the laser flash method (LFA), of the bed by up to 20.7% while maintaining a reasonable sorption capacity, as measured by the dynamic vapor sorption (DVS). Additions of copper at 5-15 wt.% and graphite flakes at 15-25 wt.% provide an optimal compromise between thermal conductivity and sorption capacity. Aluminium powder, on the other hand, offers flexibility over a wider range (5-25 wt.%). The increased thermal conductivity of these modified materials is expected to lead to more efficient heat transport, which suggests the hypothesis that it could reduce the cycle time and increase the efficiency of adsorption chillers.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20700 - Environmental engineering

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2024

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Energies

ISSN

1996-1073

e-ISSN

1996-1073

Volume of the periodical

18

Issue of the periodical within the volume

3

Country of publishing house

CH - SWITZERLAND

Number of pages

17

Pages from-to

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UT code for WoS article

001418557500001

EID of the result in the Scopus database

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