Heat and moisture transfer in energy wheels during sorption, condensation and frosting conditions

Carey Simonson, Robert Besant

Research output: Contribution to journalArticleScientificpeer-review

45 Citations (Scopus)

Abstract

A numerical model for coupled heat and moisture transfer with sorption, condensation, and frosting in rotary energy exchangers is presented and validated with experimental data.
The model is used to study condensation and frosting in energy wheels. Condensation/frosting increases with humidity and at some humidity level, water/frost will continually accumulate in the wheel. The sensitivity of condensation and frosting to wheel speed and desiccant type are studied.
The energy wheel performance is also presented during both sorption and saturation conditions for a desicant coating with a Type I sorption isotherm (e.g., molecular sieve) and a linear sorption isotherm (e.g., silica gel).
Simulation results show that the desiccant with a linear sorption curve is favorable for energy recovery because it has better performance characteristics and smaller amounts of condensation/frosting for extreme operating conditions.
Original languageEnglish
Pages (from-to)699-708
JournalJournal of Heat Transfer
Volume120
Issue number3
DOIs
Publication statusPublished - 1998
MoE publication typeA1 Journal article-refereed

Fingerprint

wheels
moisture
sorption
Sorption
Condensation
Wheels
Moisture
condensation
heat transfer
Hygroscopic Agents
desiccants
Isotherms
humidity
Atmospheric humidity
isotherms
energy
frost
exchangers
Silica Gel
Molecular sieves

Cite this

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title = "Heat and moisture transfer in energy wheels during sorption, condensation and frosting conditions",
abstract = "A numerical model for coupled heat and moisture transfer with sorption, condensation, and frosting in rotary energy exchangers is presented and validated with experimental data. The model is used to study condensation and frosting in energy wheels. Condensation/frosting increases with humidity and at some humidity level, water/frost will continually accumulate in the wheel. The sensitivity of condensation and frosting to wheel speed and desiccant type are studied. The energy wheel performance is also presented during both sorption and saturation conditions for a desicant coating with a Type I sorption isotherm (e.g., molecular sieve) and a linear sorption isotherm (e.g., silica gel). Simulation results show that the desiccant with a linear sorption curve is favorable for energy recovery because it has better performance characteristics and smaller amounts of condensation/frosting for extreme operating conditions.",
author = "Carey Simonson and Robert Besant",
year = "1998",
doi = "10.1115/1.2824339",
language = "English",
volume = "120",
pages = "699--708",
journal = "Journal of Heat Transfer",
issn = "0022-1481",
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Heat and moisture transfer in energy wheels during sorption, condensation and frosting conditions. / Simonson, Carey; Besant, Robert.

In: Journal of Heat Transfer, Vol. 120, No. 3, 1998, p. 699-708.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Heat and moisture transfer in energy wheels during sorption, condensation and frosting conditions

AU - Simonson, Carey

AU - Besant, Robert

PY - 1998

Y1 - 1998

N2 - A numerical model for coupled heat and moisture transfer with sorption, condensation, and frosting in rotary energy exchangers is presented and validated with experimental data. The model is used to study condensation and frosting in energy wheels. Condensation/frosting increases with humidity and at some humidity level, water/frost will continually accumulate in the wheel. The sensitivity of condensation and frosting to wheel speed and desiccant type are studied. The energy wheel performance is also presented during both sorption and saturation conditions for a desicant coating with a Type I sorption isotherm (e.g., molecular sieve) and a linear sorption isotherm (e.g., silica gel). Simulation results show that the desiccant with a linear sorption curve is favorable for energy recovery because it has better performance characteristics and smaller amounts of condensation/frosting for extreme operating conditions.

AB - A numerical model for coupled heat and moisture transfer with sorption, condensation, and frosting in rotary energy exchangers is presented and validated with experimental data. The model is used to study condensation and frosting in energy wheels. Condensation/frosting increases with humidity and at some humidity level, water/frost will continually accumulate in the wheel. The sensitivity of condensation and frosting to wheel speed and desiccant type are studied. The energy wheel performance is also presented during both sorption and saturation conditions for a desicant coating with a Type I sorption isotherm (e.g., molecular sieve) and a linear sorption isotherm (e.g., silica gel). Simulation results show that the desiccant with a linear sorption curve is favorable for energy recovery because it has better performance characteristics and smaller amounts of condensation/frosting for extreme operating conditions.

U2 - 10.1115/1.2824339

DO - 10.1115/1.2824339

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VL - 120

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JO - Journal of Heat Transfer

JF - Journal of Heat Transfer

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