ShareDevelopment of flat tube heat exchanger for heat pump air conditioner.
Number: pap. 2493
Author(s) : MATSUDA T., ISHIBASHI A., OKAZAKI T., et al.
Summary
We developed a new type of an aluminum flat tube heat exchanger for a heat pump outdoor unit in order to improve the energy efficiency of the heat pump system. When applying flat tube heat exchangers to heat pump outdoor units, it is difficult to achieve good condensation coil drainage, high performance during frost accumulation, and even refrigerant distribution. In order to achieve the same condensation coil drainage and performance during frost accumulation as conventional round tube heat exchangers, the flat tubes were inserted in newly designed plate fins with ellipse cutouts. In order to achieve the even distribution of refrigerant, an aluminum distributor and 3-way pipes were installed leading to the evaporator. First we describe features of the flat tube heat exchanger. Next, we present and explain experimental effects of the air-side heat transfer coefficient and the air-side pressure drop for dry, wet, and frost coil conditions. Moreover, we present experimental results of the total heat transfer performance when the flat tube heat exchanger is treated as an evaporator and when it is treated as a condenser. Finally, we explain the overall heat transfer performance of the flat tube heat exchanger and compare it to a conventional circular tube heat exchanger in the case that the each are utilized in a heat pump outdoor unit.
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Pages: 11 p.
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Details
- Original title: Development of flat tube heat exchanger for heat pump air conditioner.
- Record ID : 30013050
- Languages: English
- Source: 2014 Purdue Conferences. 15th International Refrigeration and Air-Conditioning Conference at Purdue.
- Publication date: 2014/07/14
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