Publication: Heat transfer and pressure drop in the horizontal double pipes with and without twisted tape insert
2
0
Issued Date
2006
Resource Type
File Type
application/pdf
ISSN
7351933
Other identifier(s)
2-s2.0-32044435825
Rights Holder(s)
มหาวิทยาลัยศรีนครินทรวิโรฒ
Bibliographic Citation
International Communications in Heat and Mass Transfer. Vol 33, No.2 (2006), p.166-175
Suggested Citation
Naphon P. Heat transfer and pressure drop in the horizontal double pipes with and without twisted tape insert. International Communications in Heat and Mass Transfer. Vol 33, No.2 (2006), p.166-175. doi:10.1016/j.icheatmasstransfer.2005.09.007 Retrieved from: https://hdl.handle.net/20.500.14740/5939
Author(s)
Abstract
The heat transfer characteristics and the pressure drop in the horizontal double pipes with twisted tape insert are investigated. Two test sections with different relative pitches are tested. The inner and outer diameters of the inner tube are 8.10 and 9.54 mm, respectively. The twisted tape is made from the aluminium strip with thickness of 1 mm and the length of 2000 mm. Cold and hot water are used as working fluids in shell side and tube side, respectively. The test runs are done at the cold and hot water mass flow rates ranging between 0.01 and 0.07 kg/s, and between 0.04 and 0.08 kg/s, respectively. The inlet cold and hot water temperatures are between 15 and 20 °C, and between 40 and 45 °C, respectively. The results obtained from the tube with twisted insert are compared with those without twisted tape. Non-isothermal correlations based on the data gathered during this work for predicting the heat transfer coefficient and friction factor of the horizontal pipe with twisted taped insert are proposed. The majority of the data falls within ±15%, ±10% of the proposed correlations for heat transfer coefficient and friction factor, respectively. © 2005 Elsevier Ltd. All rights reserved.
Subject(s)
Flow of water
Heat transfer
Intake systems
Pressure drop
Reynolds number
Temperature control
Tribology
Tubes (components)
Water heaters
Friction factor
Heat transfer coefficient
Horizontal double pipes
Inlet hot water temperatures
Twisted tape insert
Water mass flow
Pipe
Flow of water
Heat transfer
Intake systems
Pipe
Pressure drop
Reynolds number
Temperature control
Tribology
Tubes (components)
Water heaters
Heat transfer
Intake systems
Pressure drop
Reynolds number
Temperature control
Tribology
Tubes (components)
Water heaters
Friction factor
Heat transfer coefficient
Horizontal double pipes
Inlet hot water temperatures
Twisted tape insert
Water mass flow
Pipe
Flow of water
Heat transfer
Intake systems
Pipe
Pressure drop
Reynolds number
Temperature control
Tribology
Tubes (components)
Water heaters