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Effect of airflow channel arrangement on the discharge of a composite metal foam‐phase change material heat exchanger
Author(s) -
Talebizadehsardari Pouyan,
Mohammed Hayder I.,
Mahdi Jasim M.,
Gillott Mark,
Walker Gavin S.,
Grant David,
Giddings Donald
Publication year - 2021
Publication title -
international journal of energy research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.808
H-Index - 95
eISSN - 1099-114X
pISSN - 0363-907X
DOI - 10.1002/er.5949
Subject(s) - airflow , pressure drop , materials science , heat exchanger , phase change material , mechanics , channel (broadcasting) , composite material , tube (container) , volumetric flow rate , thermodynamics , phase change , electrical engineering , engineering , physics
Summary The effect of various arrangements of airflow channel in a proposed storage heater based on copper foam soaked in a phase change material (PCM) is investigated. Different configurations of the air channel using a serpentine channel, as well as numbers of the air channels, are examined in a representative three‐dimensional computer‐based model (Ansys Fluent). Evaluation is performed by PCM discharging rate and output air temperature of the unit. The goal is to improve both uniformity and value of air temperature. Changing the airflow arrangement using serpentine configuration to increase heat exchange surface area reduces solidification time and increases output maximum air temperature as well as pressure drop; conversely, exit air achieves lower temperature uniformity. In the case of the shortest solidification time using one air‐channel with the length of 51 cm, the solidification time reduces to almost 6 hours, compared with 13.6 hours for the straight channel with 37 cm length, with the average output temperature of 56°C compared to 41°C for the straight channel; however, the achieved temperature difference from the initial to the end of solidification time is 13.7°C compared to 4.5°C for the straight tube.