Assessment of temperature polarization in membrane distillation channels by liquid crystal thermography

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11 Citazioni (Scopus)

Abstract

The measurement of local temperature distributions within a Membrane Distillation (MD) channel is a crucial step for the optimization of the channel and spacer geometry. This information allows the estimation of temperature polarization phenomena, which can dramatically influence the thermal efficiency of the process and the optimal choice of the geometric configuration (net spacer features, channel size, etc.). In the present work a recently presented experimental technique, based on the use of Thermochromic Liquid Crystals (TLCs) and digital image analysis, has been employed in order to assess temperature polarization phenomena. The local heat transfer coefficient distribution on the membrane surface in a MD spacer-filled channel was thus assessed. Different diamond spacers geometries were investigated, in order to highlight how the geometrical features affect both pressure drop and heat transfer in spacer filled channels.
Lingua originaleEnglish
pagine (da-a)2747-2765
Numero di pagine19
RivistaDesalination and Water Treatment
Volume55
Stato di pubblicazionePublished - 2015

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distillation
Distillation
polarization
crystal
Polarization
membrane
Membranes
liquid
Geometry
temperature
heat transfer
Liquid crystals
Temperature
Heat transfer coefficients
Image analysis
Pressure drop
Diamonds
Temperature distribution
geometry
Heat transfer

All Science Journal Classification (ASJC) codes

  • Water Science and Technology
  • Ocean Engineering
  • Pollution

Cita questo

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title = "Assessment of temperature polarization in membrane distillation channels by liquid crystal thermography",
abstract = "The measurement of local temperature distributions within a Membrane Distillation (MD) channel is a crucial step for the optimization of the channel and spacer geometry. This information allows the estimation of temperature polarization phenomena, which can dramatically influence the thermal efficiency of the process and the optimal choice of the geometric configuration (net spacer features, channel size, etc.). In the present work a recently presented experimental technique, based on the use of Thermochromic Liquid Crystals (TLCs) and digital image analysis, has been employed in order to assess temperature polarization phenomena. The local heat transfer coefficient distribution on the membrane surface in a MD spacer-filled channel was thus assessed. Different diamond spacers geometries were investigated, in order to highlight how the geometrical features affect both pressure drop and heat transfer in spacer filled channels.",
author = "Andrea Cipollina and Micale, {Giorgio Domenico Maria} and Alessandro Tamburini and Michele Ciofalo and Luigi Gurreri and Sharaf Al-Sharif and Mohammed Albeirutty",
year = "2015",
language = "English",
volume = "55",
pages = "2747--2765",
journal = "Desalination and Water Treatment",
issn = "1944-3994",
publisher = "Taylor and Francis Ltd.",

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TY - JOUR

T1 - Assessment of temperature polarization in membrane distillation channels by liquid crystal thermography

AU - Cipollina, Andrea

AU - Micale, Giorgio Domenico Maria

AU - Tamburini, Alessandro

AU - Ciofalo, Michele

AU - Gurreri, Luigi

AU - Al-Sharif, Sharaf

AU - Albeirutty, Mohammed

PY - 2015

Y1 - 2015

N2 - The measurement of local temperature distributions within a Membrane Distillation (MD) channel is a crucial step for the optimization of the channel and spacer geometry. This information allows the estimation of temperature polarization phenomena, which can dramatically influence the thermal efficiency of the process and the optimal choice of the geometric configuration (net spacer features, channel size, etc.). In the present work a recently presented experimental technique, based on the use of Thermochromic Liquid Crystals (TLCs) and digital image analysis, has been employed in order to assess temperature polarization phenomena. The local heat transfer coefficient distribution on the membrane surface in a MD spacer-filled channel was thus assessed. Different diamond spacers geometries were investigated, in order to highlight how the geometrical features affect both pressure drop and heat transfer in spacer filled channels.

AB - The measurement of local temperature distributions within a Membrane Distillation (MD) channel is a crucial step for the optimization of the channel and spacer geometry. This information allows the estimation of temperature polarization phenomena, which can dramatically influence the thermal efficiency of the process and the optimal choice of the geometric configuration (net spacer features, channel size, etc.). In the present work a recently presented experimental technique, based on the use of Thermochromic Liquid Crystals (TLCs) and digital image analysis, has been employed in order to assess temperature polarization phenomena. The local heat transfer coefficient distribution on the membrane surface in a MD spacer-filled channel was thus assessed. Different diamond spacers geometries were investigated, in order to highlight how the geometrical features affect both pressure drop and heat transfer in spacer filled channels.

UR - http://hdl.handle.net/10447/98499

M3 - Article

VL - 55

SP - 2747

EP - 2765

JO - Desalination and Water Treatment

JF - Desalination and Water Treatment

SN - 1944-3994

ER -