Development of an Accordion-type Offset-fin Heat Exchanger for Air-conditioners
Abstract
To reduce the depth of the indoor heat exchanger in room air-conditioners, we studied fin and tube heat exchangers, and found that we could make the heat transfer coefficient of fins 30% higher than of conventional fins by reducing louver width and fin pitch.
We also improved water drainage on the surface of the fins by adopting accordion-type offset-fin heat exchangers. We found that the material cost of a heat exchanger was minimized when the heat exchanger had a tube 7 mm in diameter, and we could increase the heat transter coefficient of the refrigerant side by developing a new grooved tube 7 mm in diameter. We succeeded in making the heat exchanger 40% thinner than conventional types.- Publication:
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Transactions of the Japan Society of Refrigerating and Air Conditioning Engineers
- Pub Date:
- 2011
- Bibcode:
- 2011TRACE..12..219I
- Keywords:
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- Heat Transfer Coefficient;
- Pressure Drop;
- Fin;
- Tube;
- Heat Exchanger;
- Drainage;
- Offset-fin;
- Air-conditioner