Numerical simulation of simultaneous heat and moisture transfer in a domestic refrigerator

2010 ◽  
Vol 33 (7) ◽  
pp. 1425-1433 ◽  
Author(s):  
O. Laguerre ◽  
S. Benamara ◽  
D. Flick
Keyword(s):  
Numerical Simulation ◽  
Moisture Transfer ◽  
Heat And Moisture Transfer ◽  
Domestic Refrigerator ◽  
Heat And Moisture ◽  
Simultaneous Heat

scholarly journals Modification of building energy simulation tool TRNSYS for modelling nonlinear heat and moisture transfer phenomena by TRNSYS/MATLAB integration

2020 ◽  
Vol 172 ◽  
pp. 25009
Author(s):  
Ajaya Ketan Nayak ◽  
Aya Hagishima
Keyword(s):  
Numerical Simulation ◽  
Moisture Transfer ◽  
Ambient Air ◽  
Building Energy ◽  
Energy Simulation ◽  
Modular Structure ◽  
Integration Scheme ◽  
Building Energy Simulation ◽  
Heat And Moisture Transfer ◽  
Heat And Moisture

Software for numerical simulation of various types of energy used in buildings, i.e. building energy simulation (BES), have become an essential tool for recent research pertaining to building physics. TRNSYS is a well-known BES used in both academia and the construction industry for a wide range of simulations, such as the design and performance evaluation of buildings and related facilities for heating, cooling, and ventilation. TRNSYS has a modular structure comprising various components, and each component is interconnected and compiled through a common interface using a FORTRAN compiler. Its modular structure enables interactions with various external numerical simulation tools, such as MATLAB, Python, and ESP-r. For ordinary simulations of building energy load using TRNSYS, the generic module Type 56 is usually recommended, which provides detailed physics modelling of building thermal behaviours based on unsteady energy conservation equations and Fourier’s law for each building material. However, Type 56 explicitly depends on the transfer function method to discretise the original differential equations; therefore, it cannot model nonlinear phenomena, such as latent heat and moisture transfer between a building surface and ambient air. In other words, the current TRNSYS cannot be used to estimate the effectiveness of evaporation during cooling, which is a typical passive design method. Hence, the authors developed a MATLAB/TRNSYS integration scheme, in which TRNSYS was modified to model simultaneous heat and moisture transfer from the wet roof surface of a building. This scheme enabled TRNSYS to calculate the rate of evaporative heat and moisture transfer dynamically from the roof surface, assuming a control volume approximation of the roof surface. Finally, the effect of evaporative cooling on the thermal performance of an Indian building was estimated using the modified model.

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.

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