Evaluative Case Study in Lightweight Wooden Wall Research

Abstract

This presented article deals with two newly designed experimental walls with different measuring sections (5 for each lightweight wooden wall). All fragments meet the standards required for zero and energy-plus buildings, which would be mandatory in Slovakia from the year 2020. The experimental walls are located in central Europe (town Zilina, Slovakia). Description of individual test sections, the measuring technology, data collection, interior technical equipment and outdoor boundary conditions monitoring are introduced. In the future, the experimental research should progressively combine theoretical calculations with real measurement and computer HAM simulation. In this paper, the focus is aimed to the temperature profiles in wall fragments during seven days chosen from the spring period in the year 2017. The results were graphically presented and evaluated from a point of view of continuous temperature measurement in the structure, exterior boundary conditions, wall orientation and surface character (material, color). Also further intensions of research are drawn.

Obtaining the Short-Wave Radiation Absorptivity Based on the Surface Temperature Measurement and Ham Simulation

“…For the simulation following sections were used: one with the bright coating with both orientations and another with the dark coating with east orientation. More detailed material properties and compositions can be found in [Staffenova, 2019]. Within the sections thermistors and capacity relative humidity sensors are used.…”

Impact of diffuse solar radiation on HAM simulation accuracy

“…For purpose of this paper also the data from a façade meteorological station (FAMS) were used [10]. This FAMS records the short and long wave solar radiation on the vertical surface with same southern orientation as the experimental wooden wall [11] used for the comparison of temperatures from the simulation. Devices used for measurement of solar radiation are shown in Fig.…”

“…Material properties of the wall tested in simulation were taken from the software library. Simulated wall composition was taken from the wooden wall research [11] and it is described in Table 1. It is a southward oriented wall with coating on the outdoor surface.…”

Influence analysis of climate data time-step on the accuracy of HAM simulation

“…This new automatic weather station (since 2017) is used for whole experimental research conducted by the department (Fig. 1), such as façade research [4], wooden wall research [5] or research of windows for low energy houses [6]. For all conducted research tasks, a precise and high resolution monitoring of climate parameters is very important.…”

“…Detailed view at new weather station located on the roof of laboratory[5] including a shading ring for diffuse solar radiation measurement.…”