Modeling of Air to Air Enthalpy Heat Exchanger

被引：27

作者：

Nasif, Mohammad Shakir ^{[1
]}

Al-Waked, Ra'fat ^{[2
]}

Behnia, Masud ^{[3
]}

Morrison, Graham ^{[4
]}

机构：

[1] Opus Int Consultants, Auckland 1010, New Zealand

[2] Prince Mohammad Bin Fahd Univ, Dept Mech Engn, Al Khobar, Saudi Arabia

[3] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia

[4] Univ New S Wales, Sch Mech & Mfg Engn, Sydney, NSW, Australia

来源：

HEAT TRANSFER ENGINEERING | 2012年 / 33卷 / 12期

基金：

澳大利亚研究理事会;

关键词：

ENERGY RECOVERY VENTILATOR; MOISTURE TRANSFER; MASS-TRANSFER; MEMBRANE; PERFORMANCE; POINTS;

D O I：

10.1080/01457632.2012.659616

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The thermal performance of a Z-shaped enthalpy heat exchanger utilizing 45-gsm Kraft paper as the heat and moisture transfer surface for heating, ventilation, and air conditioning (HVAC) energy recovery is experimentally investigated through temperature and moisture content measurements. A mathematical model is developed and validated against the experimental results using the effectiveness-NTU method. In this model the paper moisture transfer resistance is determined by paper moisture permeability measurements. Results showed that the paper moisture transfer resistance is not constant and varies with moisture gradient across the paper. Furthermore, the model is used to predict the heat exchanger performance for different heat exchanger flow configurations. The results showed that higher effectiveness values are achieved when the heat exchanger flow path width is reduced. Temperature and moisture distribution in the heat exchanger is also studied using a computational fluid dynamics package (FLUENT). To model the moisture transfer through the porous materials a nondimensional sensible-latent effectiveness ratio was developed to obtain the moisture boundary conditions on the heat exchanger surface.

引用

页码：1010 / 1023

页数：14

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