Effects of coil diameter and pitch on the flow characteristics of alternative refrigerants flowing through adiabatic helical capillary tubes

บทความในวารสาร


ผู้เขียน/บรรณาธิการ


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รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่งChingulpitak S., Wongwises S.

ผู้เผยแพร่Elsevier

ปีที่เผยแพร่ (ค.ศ.)2010

วารสารInternational Communications in Heat and Mass Transfer (0735-1933)

Volume number37

Issue number9

หน้าแรก1305

หน้าสุดท้าย1311

จำนวนหน้า7

นอก0735-1933

eISSN1879-0178

URLhttps://www.scopus.com/inward/record.uri?eid=2-s2.0-77957830561&doi=10.1016%2fj.icheatmasstransfer.2010.07.005&partnerID=40&md5=d0607aaee6e3a0203e8811ca4257a596

ภาษาEnglish-Great Britain (EN-GB)


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บทคัดย่อ

This paper presents the effects of various geometries of helical capillary tubes on the flow characteristics of alternative refrigerants flowing through adiabatic helical capillary tubes. The theoretical model is based on the conservation of mass, energy and momentum of fluids in the capillary tube. The two-phase flow model developed was based on a homogenous flow assumption. The model was validated by comparing it with the experimental data of published in literature for R-22, particularly various pairs of refrigerants. It was found conventional refrigerants had lower capillary lengths than alternative refrigerants. For all pairs, the numerical results showed that the traditional refrigerants consistently gave lower pressure drops for both single-phase and two-phase flows, which resulted in longer tube lengths. The results show that coil diameter variation (less than 300. mm) for helical capillary tube geometries affected the length of helical capillary tubes. However, pitch variation (more than 300. mm) had no significant effect on the length of helical capillary tubes. This adiabatic helical capillary tube model can be used to integrate system models working with alternative refrigerants for design and optimisation. ฉ 2010 Elsevier Ltd.


คำสำคัญ

Coil diameterHomogeneous flowPitch


อัพเดทล่าสุด 2023-26-09 ถึง 07:35