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Heat and Mass Transfer

, Volume 53, Issue 7, pp 2287–2296 | Cite as

Transient performance and temperature field of a natural convection air dehumidifier loop

  • Mohammad Ali FazilatiEmail author
  • Ahmad Sedaghat
  • Ali-Akbar Alemrajabi
Original

Abstract

In this paper, transient performance of the previously introduced natural convection heat and mass transfer loop is investigated for an air dehumidifier system. The performance of the loop is studied in different conditions of heat source/heat sink temperature and different startup desiccant concentrations. Unlike conventional loops, it is observed that natural convection of the fluid originates from the heat sink towards the heat source. The proper operation of the cycle is highly dependent on the heat sink/heat source temperatures. To reduce the time constant of the system, a proper desiccant concentration should be adopted for charge of the loop.

Keywords

Particle Image Velocimetry Heat Sink Vapor Pressure Difference Liquid Desiccant Desiccant Solution 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

List of symbols

C

Concentration (kgsalt/kgsolution)

down

Lower horizontal level

P

Pressure (kPa)

T

Temperature (°C)

up

Upper horizontal level

\(\dot{V}\)

Volume flow rate (l/h)

Abbreviations

AC

Air conditioning

ASTM

American society of testing machines

CaCl2

Calcium chloride

HFM

Hollow fiber membrane

IAQ

Indoor air quality

LAMEE

Liquid to air membrane energy exchanger

LDAC

Liquid desiccant air conditioning system

LiBr

Lithium bromide

LiCl

Lithium chloride

MgCl2

Magnesium chloride

NCLD

Natural convection liquid desiccant

PE

Poly ethylene

PIV

PARTICLE image velocimetry

PP

Poly propylene

PVDF

Poly vinylidene fluoride

RTD

Resistance temperature detector

TEG

Tri-ethylene glycol

Subscripts

db

Dry bulb

wb

Wet bulb

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Copyright information

© Springer-Verlag Berlin Heidelberg 2017

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringIsfahan University of TechnologyIsfahanIran

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