Next Article in Journal
Calculation of Hybrid Ionized Field of AC/DC Transmission Lines by the Meshless Local Petorv–Galerkin Method
Next Article in Special Issue
Artificial Neural Network–Based Control of a Variable Refrigerant Flow System in the Cooling Season
Previous Article in Journal
Reliability and Maintenance Prioritization Analysis of Combined Cooling, Heating and Power Systems
Previous Article in Special Issue
Convex Programming and Bootstrap Sensitivity for Optimized Electricity Bill in Healthcare Buildings under a Time-Of-Use Pricing Scheme
Article Menu
Issue 6 (June) cover image

Export Article

Open AccessArticle
Energies 2018, 11(6), 1520; https://doi.org/10.3390/en11061520

Boundary Conditions Accuracy Effect on the Numerical Simulations of the Thermal Performance of Building Elements

1
School of Engineering, Frederick University, Nicosia 1036, Cyprus
2
Faculty of Civil Engineering and Architecture, Kaunas University of Technology, Kaunas 51367, Lithuania
3
Department of Electrical and Computer Engineering, University of Nicosia, Nicosia 2147, Cyprus
*
Author to whom correspondence should be addressed.
Received: 15 April 2018 / Revised: 1 June 2018 / Accepted: 6 June 2018 / Published: 11 June 2018
(This article belongs to the Special Issue Building Energy Use: Modeling and Analysis)
View Full-Text   |   Download PDF [3433 KB, uploaded 20 June 2018]   |  

Abstract

Numerical simulation is widely used in the field of computational building physics for the definition of the thermal performance of building elements. An integral component of numerical simulation using finite elements is the boundary conditions, which, in the case of simulating the thermal performance of a building element, are usually expressed in terms of the external surface temperature as a function of time. The purpose of this study is to examine the effect of the accuracy of the boundary conditions on the thermal performance simulation of building elements. The assumption that the temperature versus time is a sinusoidal function, applied in standard methods, is comparatively assessed with the actual function for diverse climatic conditions using finite elements simulation. The findings of the analysis indicate that the sinusoidal function fails to accurately simulate real boundary conditions. The originality of this study lies within the adoption of a signal reconstruction algorithm, which follows a novel approach by reconstructing the actual temperature versus time signal for the simulation of the actual boundary conditions. View Full-Text
Keywords: building envelope; numerical simulation; boundary condition; finite element method; sinusoidal function building envelope; numerical simulation; boundary condition; finite element method; sinusoidal function
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
SciFeed

Share & Cite This Article

MDPI and ACS Style

Fokaides, P.A.; Kylili, A.; Kyriakides, I. Boundary Conditions Accuracy Effect on the Numerical Simulations of the Thermal Performance of Building Elements. Energies 2018, 11, 1520.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top