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Measuring the overall volumetric heat transfer coefficient in a vapour-liquid-liquid three-phase direct contact heat exchanger

Mahood, HM, Campbell, Alasdair, Thorpe, Rex and Sharif, Adel (2017) Measuring the overall volumetric heat transfer coefficient in a vapour-liquid-liquid three-phase direct contact heat exchanger Heat Transfer Engineering.

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Abstract

An experimental investigation of the volumetric heat transfer coefficient in a three-phase direct contact condenser was carried out. A 75-cm long cylindrical Perspex column with a 4 cm diameter was used. Only 48 cm of the column was utilised as the active direct contact condensation height. Pentane vapour at three different initial temperatures (40°C, 43.5°C and 47.5°C), with differing mass flow rates, and tap water at a constant initial temperature (19°C) with five different mass flow rates were employed as the dispersed phase and the continuous phases, respectively. The results showed that the volumetric heat transfer coefficient increased with increasing mass flow rate ratio (variable dispersed phase mass flow rate per constant continuous phase mass flow rate), the continuous phase mass flow rate and holdup ratio. An optimal value of the continuous phase mass flow rate is shown for an individual dispersed phase mass flow rates. This value increases with increasing vapour (dispersed) phase mass flow rate. Furthermore, it was observed that the initial driving temperature difference had no effect on the volumetric heat transfer coefficient. While, the temperature gained by the continuous phase has a considerable effect.

Item Type: Article
Subjects : Chemical & Process Engineering
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
NameEmailORCID
Mahood, HMUNSPECIFIEDUNSPECIFIED
Campbell, Alasdaira.n.campbell@surrey.ac.ukUNSPECIFIED
Thorpe, RexRex.Thorpe@surrey.ac.ukUNSPECIFIED
Sharif, AdelA.Sharif@surrey.ac.ukUNSPECIFIED
Date : 21 February 2017
Identification Number : 10.1080/01457632.2017.1295736
Copyright Disclaimer : This is an Accepted Manuscript of an article published by Taylor & Francis in Heat Transfer Engineering on 21 Feb 2017, available online: http://www.tandfonline.com/10.1080/01457632.2017.1295736
Additional Information : Full text not available from this repository.
Depositing User : Symplectic Elements
Date Deposited : 08 Mar 2017 15:49
Last Modified : 31 Oct 2017 19:11
URI: http://epubs.surrey.ac.uk/id/eprint/813715

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