Applying a variable geometry ejector in a solar ejector refrigeration system
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24210%2F20%3A00008171" target="_blank" >RIV/46747885:24210/20:00008171 - isvavai.cz</a>
Result on the web
<a href="https://api.elsevier.com/content/article/eid/1-s2.0-S0140700720300438" target="_blank" >https://api.elsevier.com/content/article/eid/1-s2.0-S0140700720300438</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.ijrefrig.2020.01.018" target="_blank" >10.1016/j.ijrefrig.2020.01.018</a>
Alternative languages
Result language
angličtina
Original language name
Applying a variable geometry ejector in a solar ejector refrigeration system
Original language description
This paper presents an experimental study of the influence of a variable geometry ejector (VGE) design on the performance of a small-scale, 1.5 kW nominal capacity solar heat driven ejector air-conditioning system under real-life working conditions. Under variable operating conditions (e.g. solar radiation, ambient temperature) fixed geometry ejector performs poorly, therefore the objective of the present work was to prove the benefit of the VGE concept. In the experimentally tested VGE the area ratio through a movable spindle (SP) and the nozzle exit position (NXP) can be adjusted in order to respond to the operating conditions. The results showed very stable operation of the cooling cycle during the experiments. Both NXP, SP had considerable influences on the cooling cycle performance. An optimal NXP was identified, which did not change with various operating conditions. Similarly, SP also showed an optimum; however, the optimum point depended strongly on the operating conditions. The results clearly indicated the benefit of using the VGE design over the fixed geometry. COP improvement was as high as 24% with a maximum of 0.29 corresponding to a cooling capacity of 1.6 kW when compared to a fixed geometry ejector. The study also confirmed the importance of using a variable-speed pump in the ejector cycle
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
20301 - Mechanical engineering
Result continuities
Project
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Continuities
S - Specificky vyzkum na vysokych skolach
Others
Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
International Journal of Refrigeration
ISSN
0140-7007
e-ISSN
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Volume of the periodical
113
Issue of the periodical within the volume
May
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
187-195
UT code for WoS article
000521284400020
EID of the result in the Scopus database
2-s2.0-85079851625