Heat and moisture transfer performance of thin cotton fabric under impingement drying

2018 ◽  
Vol 89 (15) ◽  
pp. 3089-3097
Author(s):  
Miao Qian ◽  
Jinghan Wang ◽  
Zhong Xiang ◽  
Zhewei Zhao ◽  
Xudong Hu
Keyword(s):  
Moisture Content ◽  
Cotton Fabric ◽  
Moisture Transfer ◽  
Transfer Model ◽  
Transfer Performance ◽  
Heat And Moisture Transfer ◽  
Drying Time ◽  
Uniform Distributions ◽  
Heat And Moisture ◽  
Over Time

To investigate the drying characteristics of thin cotton fabric for reducing the energy consumption during the heat setting process, a two-dimensional heat and moisture transfer model considering lateral heat and moisture transmission under the impingement drying condition was developed in this study. The curves of the variation in fabric temperature and moisture content over time were obtained and the results indicate that the drying rate increases with the decrease in the moisture content in the fabric. In addition, non-uniform distributions of temperature and moisture on the fabric over time were obtained. The drying time per unit area on the fabric was found to increase with time. Further, experiments were conducted to test the heat and moisture transfer performance of the fabric, and the experimental results agree reasonably well with the calculations.

scholarly journals Application Method of a Simplified Heat and Moisture Transfer Model of Building Construction in Residential Buildings

Energies ◽  
2021 ◽  
Vol 14 (14) ◽  
pp. 4180
Author(s):  
Joowook Kim ◽  
Michael Brandemuehl
Keyword(s):  
Latent Heat ◽  
Moisture Transfer ◽  
Residential Buildings ◽  
Building Energy ◽  
The United States ◽  
Building Envelope ◽  
Outdoor Environment ◽  
Transfer Model ◽  
Heat And Moisture Transfer ◽  
Heat And Moisture

Several building energy simulation programs have been developed to evaluate the indoor conditions and energy performance of buildings. As a fundamental component of heating, ventilating, and air conditioning loads, each building energy modeling tool calculates the heat and moisture exchange among the outdoor environment, building envelope, and indoor environments. This paper presents a simplified heat and moisture transfer model of the building envelope, and case studies for building performance obtained by different heat and moisture transfer models are conducted to investigate the contribution of the proposed steady-state moisture flux (SSMF) method. For the analysis, three representative humid locations in the United States are considered: Miami, Atlanta, and Chicago. The results show that the SSMF model effectively complements the latent heat transfer calculation in conduction transfer function (CTF) and effective moisture penetration depth (EMPD) models during the cooling season. In addition, it is found that the ceiling part of a building largely constitutes the latent heat generated by the SSMF model.

Ground-Coupled Heat and Moisture Transfer From Buildings: Part 1 — Analysis and Modeling

2001 ◽  
Author(s):  
Michael P. Deru ◽  
Allan T. Kirkpatrick
Keyword(s):  
Moisture Transfer ◽  
Transfer Model ◽  
Heat And Moisture Transfer ◽  
Ground Temperatures ◽  
Heat Effects ◽  
Tightly Coupled ◽  
Finite Element Procedure ◽  
Coupled Heat And Moisture ◽  
Heat And Moisture ◽  
Properties Of Soil

Abstract Ground-heat transfer is tightly coupled with soil-moisture transfer. The coupling is threefold: heat is transferred by thermal conduction and by moisture transfer; the thermal properties of soil are strong functions of the moisture content; and moisture phase change includes latent heat effects and changes in thermal and hydraulic properties. A heat and moisture transfer model was developed to study the ground-coupled heat and moisture transfer from buildings. The model also includes detailed considerations of the atmospheric boundary conditions, including precipitation. Solutions for the soil temperature distribution are obtained using a finite element procedure. The model compared well with the seasonal variation of measured ground temperatures.

Modeling Heat and Moisture Transfer within Porous Textiles under High Temperature Gradients

2012 ◽  
Vol 455-456 ◽  
pp. 1136-1139 ◽  
Author(s):  
Fang Long Zhu ◽  
Ke Jing Li
Keyword(s):  
Cotton Fabric ◽  
Moisture Transfer ◽  
Drying Shrinkage ◽  
High Heat ◽  
High Heat Flux ◽  
Heat And Moisture Transfer ◽  
Thermal Protective Clothing ◽  
Heat And Moisture Transport ◽  
Heat And Moisture ◽  
Simultaneous Heat

The paper consider heat and moisture transport within cotton fabric exposed to fire as drying process. A mathematical model of simultaneous heat and moisture transfer is proposed for the prediction of temperature distributions during high heat flux condition based on the theory of drying. Shrinkage occurring in the drying zone was incorporated into the present numerical model. Using the model, we will can understand the drying mechanism and process of flame retardant cotton fabric used for thermal protective clothing. The discrete calculation and experiments will be presented in the further study.

Ground-Coupled Heat and Moisture Transfer from Buildings Part 1–Analysis and Modeling*

2001 ◽  
Vol 124 (1) ◽  
pp. 10-16 ◽  
Author(s):  
Michael P. Deru ◽  
Allan T. Kirkpatrick
Keyword(s):  
Moisture Transfer ◽  
Transfer Model ◽  
Heat And Moisture Transfer ◽  
Ground Temperatures ◽  
Heat Effects ◽  
Tightly Coupled ◽  
Finite Element Procedure ◽  
Coupled Heat And Moisture ◽  
Heat And Moisture ◽  
Properties Of Soil

Ground-heat transfer is tightly coupled with soil-moisture transfer. The coupling is threefold: heat is transferred by thermal conduction and by moisture transfer; the thermal properties of soil are strong functions of the moisture content; and moisture phase change includes latent heat effects and changes in thermal and hydraulic properties. A heat and moisture transfer model was developed to study the ground-coupled heat and moisture transfer from buildings. The model also includes detailed considerations of the atmospheric boundary conditions, including precipitation. Solutions for the soil temperature distribution are obtained using a finite element procedure. The model compared well with the seasonal variation of measured ground temperatures.

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