Influence of condensation on the outer surface of polymer hollow fiber heat exchangers during heat transfer

Tereza Brozova, Erik Bartuli

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Condensation during heat transfer processes can be very beneficially used due to the large amount of energy contained in phase change (vapor to liquid). This contribution focuses on the possible use of polymer hollow fiber heat exchangers (PHFHEs) in air conditioning. PHFHEs consist of hundreds or thousands of polymer hollow fibers with an outer diameter of around 1 mm. The wall thickness is approximately 10% of the outer diameter. PHFHEs are heat exchangers with such benefits as low weight, easy shaping, corrosion resistance, and resistance to many chemical solutions. In comparison with metal heat exchangers (made of copper, aluminum, or stainless steel) the plastic wall of PHFHEs has low thermal conductivity (between 0.1 and 0.4 Wm-1K-1). This seems to be their key disadvantage. However, due to the extremely small thickness of the fiber's wall this disadvantage is negligible. PHFHEs are compact heat exchangers with a large heat transfer area with respect to their volume. This paper shows the results of condensation tests for PHFHEs that consist of 6 equivalent layers of polypropylene fibers with a length of 190 mm. The total number of fibers is 798. The air humidity was set to 50% with an air temperature of 27°C, which are the typical conditions for such tests in air conditioning technology. Another important parameter was the velocity of the air. Testing velocities were chosen as 3 m s-1 and 1 m s-1. The influence of gravity was studied by putting the PHFHEs in three different positions. The fibers were placed in horizontal and vertical positions, and in a position where fibers form an angle of 45° with the ground. The study showed the ineffectiveness of placing the PHFHE in a horizontal position and suggests that it is better to have a larger distance between the layers of fibers.

Original languageEnglish
Title of host publicationASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018
PublisherAmerican Society of Mechanical Engineers(ASME)
ISBN (Print)9780791851197
Publication statusPublished - 1 Jan 2018
Externally publishedYes
EventASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018 - Dubrovnik, Croatia
Duration: 10 Jun 201813 Jun 2018

Publication series

NameASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018

Conference

ConferenceASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018
CountryCroatia
CityDubrovnik
Period10.6.1813.6.18

Fingerprint

Heat Exchanger
Condensation
Heat exchangers
Heat Transfer
Polymers
Fiber
Heat transfer
Fibers
Influence
Conditioning
Air conditioning
Horizontal
Air
Polypropylene
Corrosion Resistance
Polypropylenes
Stainless Steel
Phase Change
Humidity
Thermal Conductivity

ASJC Scopus subject areas

  • Process Chemistry and Technology
  • Fluid Flow and Transfer Processes
  • Modelling and Simulation

Cite this

Brozova, T., & Bartuli, E. (2018). Influence of condensation on the outer surface of polymer hollow fiber heat exchangers during heat transfer. In ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018 (ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018). American Society of Mechanical Engineers(ASME).

Influence of condensation on the outer surface of polymer hollow fiber heat exchangers during heat transfer. / Brozova, Tereza; Bartuli, Erik.

ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018. American Society of Mechanical Engineers(ASME), 2018. (ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Brozova, T & Bartuli, E 2018, Influence of condensation on the outer surface of polymer hollow fiber heat exchangers during heat transfer. in ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018. ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018, American Society of Mechanical Engineers(ASME), ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018, Dubrovnik, Croatia, 10.6.18.
Brozova T, Bartuli E. Influence of condensation on the outer surface of polymer hollow fiber heat exchangers during heat transfer. In ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018. American Society of Mechanical Engineers(ASME). 2018. (ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018).
Brozova, Tereza ; Bartuli, Erik. / Influence of condensation on the outer surface of polymer hollow fiber heat exchangers during heat transfer. ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018. American Society of Mechanical Engineers(ASME), 2018. (ASME 2018 16th International Conference on Nanochannels, Microchannels, and Minichannels, ICNMM 2018).
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