scholarly journals An Experimental Framework for Investigating the Hygrothermal Properties of Multi-Functional Wood Fibre and XPS Panels for Residential Buildings

2016 ◽  
Author(s):  
K M Emtiaz Salim ◽  
Hadia Awad ◽  
Mustafa Gül ◽  
Robert Knudson ◽  
Mohamed Al-Hussein
Keyword(s):  
Oriented Strand Board ◽  
Residential Buildings ◽  
Wood Fiber ◽  
Weather Conditions ◽  
Climate Conditions ◽  
The North ◽  
Hygrothermal Performance ◽  
Wood Frame ◽  
Field Experimentation ◽  
Wall Assembly

In this paper, an experimental setup developed for an ongoing project to investigate the hygrothermal performance of wall systems under different climate conditions is presented. As a step toward establishing the hygrothermal performance of various wood-frame wall assemblies, this research focuses on field experimentation of two types of multi-functional panels (MFPs), along with a conventional wall assembly, in two different locations in Canada: Vancouver, British Columbia, and Edmonton, Alberta. The three wall assembly types are adjacent to one another along the north- and south-facing walls of the test huts in the two cities. This experiment focuses on the effect of the various ambient weather conditions on the two innovative MFPs and on the conventional wall assembly, and on determining the long-term hygrothermal performance of the tested assemblies; it also establishes the passive solar effect on the south-facing assemblies compared to the corresponding north-oriented assemblies. Both MFPs are fixed on the exterior side of a conventional wood-frame wall assembly. The components of the first MFP are 6.4 mm Oriented Strand Board (OSB), 40 mm wood-fiber insulationäóîan environmentally-friendly and fully recyclable materialäóîand 6.4 mm OSB, while those of the second MFP are 6.4 mm OSB, 25 mm Extruded Polystyrene (XPS) core, and 6.4 mm OSB. Along with the details of the experimental setups, some sample data is presented.

scholarly journals Experimental Study On The Flexural Behavior Of Structural Insulated Headers

2021 ◽  
Author(s):  
Dana Benadova
Keyword(s):  
Oriented Strand Board ◽  
Experimental Testing ◽  
Residential Buildings ◽  
Limit State ◽  
Operating Conditions ◽  
Flexural Behavior ◽  
Design Strength ◽  
Structural Capacity ◽  
Wood Frame ◽  
Flexural Tests

A series of flexural tests were conducted on 18 structural insulated header panels with timber flanges and Oriented Strand Board (OSB) webs to predict their behavior when subject to gravity loading when used in residential and low rise non-residential buildings. The experiments were designed and performed to test full-scale Structural Insulated Panels (SIPs) headers for exterior or interior wall residential construction. The structural adequacy of the header panels of various sizes is investigated in order to meet both strength and serviceability limit-state design requirements per Canadian Standards for timber design. Strength requirements included flexure and shear, while serviceability check included limiting deflection under operating conditions. Results from experimental testing were used to draw conclusions with respect to the structural qualifications for these SIP headers to be "as good as" the structural capacity of conventional wood-frame buildings.

scholarly journals Moisture Redistribution in Full-Scale Wood-Frame Wall Assemblies: Measurements and Engineering Approximation

Buildings ◽  
2020 ◽  
Vol 10 (8) ◽  
pp. 141 ◽  
Author(s):  
Charles R. Boardman ◽  
Samuel V. Glass ◽  
Samuel L. Zelinka
Keyword(s):  
Oriented Strand Board ◽  
Mass Measurement ◽  
Three Dimensional ◽  
Full Scale ◽  
Engineering Practice ◽  
One Dimensional ◽  
Wood Frame ◽  
The One ◽  
Wall Assembly ◽  
Moisture Redistribution

A counter-balanced mass measurement system was constructed to allow measurement of water loss from a full-scale wood-framed wall assembly. Water was injected onto a localized area of paper towel adjacent to the oriented strand board (OSB) wall sheathing. Moisture pins in the OSB and relative humidity/temperature sensors inside the insulated wall cavity monitored conditions as the wall dried out. The wetted OSB area’s moisture content dropped at a faster rate than the total mass of the wall, indicating moisture redistribution within the wall. A simple model was used to calculate overall moisture redistribution, which was characterized using a near-exponential decay function. This simplification of the inherently three-dimensional physics of moisture redistribution could be incorporated into the one-dimensional hygrothermal models often used in research and engineering practice.

scholarly journals Experimental Study On The Flexural Behavior Of Structural Insulated Headers

2021 ◽  
Author(s):  
Dana Benadova
Keyword(s):  
Oriented Strand Board ◽  
Experimental Testing ◽  
Residential Buildings ◽  
Limit State ◽  
Operating Conditions ◽  
Flexural Behavior ◽  
Design Strength ◽  
Structural Capacity ◽  
Wood Frame ◽  
Flexural Tests

A series of flexural tests were conducted on 18 structural insulated header panels with timber flanges and Oriented Strand Board (OSB) webs to predict their behavior when subject to gravity loading when used in residential and low rise non-residential buildings. The experiments were designed and performed to test full-scale Structural Insulated Panels (SIPs) headers for exterior or interior wall residential construction. The structural adequacy of the header panels of various sizes is investigated in order to meet both strength and serviceability limit-state design requirements per Canadian Standards for timber design. Strength requirements included flexure and shear, while serviceability check included limiting deflection under operating conditions. Results from experimental testing were used to draw conclusions with respect to the structural qualifications for these SIP headers to be "as good as" the structural capacity of conventional wood-frame buildings.

Current Status of Anserinae Wintering in Azov-Black Sea Region of Ukraine

2019 ◽  
Vol 53 (4) ◽  
pp. 297-312
Author(s):  
Yu. O. Andryushchenko ◽  
V. S. Gavrilenko ◽  
V. A. Kostiushyn ◽  
V. N. Kucherenko ◽  
A. S. Mezinov ◽  
...  
Keyword(s):  
Black Sea ◽  
Current Status ◽  
Anser Anser ◽  
Scientific Publications ◽  
Climate Conditions ◽  
Black Sea Region ◽  
Chen Caerulescens ◽  
Branta Bernicla ◽  
The North ◽  
Different Seasons

Abstract In the article is analyzed own field data of the authors and scientific publications on the wintering of Anserinae in the Azov-Black Sea region of Ukraine in 1900–2017, but the main data was obtained in frame of international mid-winter counts (IWC) in 2005–2017. It was found that 9 species of Anserinae occur in this region during the different seasons of the year: Anser anser — nesting, wintering and migrating; Rufibrenta ruficollis, A. albifrons, A. erythropus, A. fabalis — migrating and wintering; Branta canadensis, Branta leucopsis, Branta bernicla, Chen caerulescens — vagrant or birds which flew away from captivity (zoo etc.). Eulabeia indica — is possible vagrant species. The most numerous wintering species is A. albifrons, common — Rufibrenta ruficollis, not numerous — Anser anser, the other species are not met annually and registered in a very small number. There was almost tenfold drop in number of wintering geese in the Azov-Black Sea region of Ukraine during the period of counts. The main reasons of such reducing of geese amount are the followwing: weather and climate conditions, changes in the forage acessibility, hunting and poaching pressure, poisoning as a result of deratization of agricultural lands, and from 2014 — the militarization of the Syvash area and stop of water supplying of Crimea through the North Crimean channell. It is likely that the factors mentioned above led to relocating of wintering areas of Anserinae, and resulted in decreasing of their amount in this region.

Prospects of spring wheat cultivation in the conditions of arid Volga region

2020 ◽  
pp. 28-33
Author(s):  
Valery Genadievich Popov ◽  
Andrey Vladimirovich Panfilov ◽  
Yuriy Vyacheslavovich Bondarenko ◽  
Konstantin Mikhailovich Doronin ◽  
Evgeny Nikolaevih Martynov ◽  
...  
Keyword(s):  
Spring Wheat ◽  
Soil Layer ◽  
Weather Conditions ◽  
Volga Region ◽  
Mineral Fertilizers ◽  
Climate Conditions ◽  
Wheat Cultivation ◽  
Forest Belts ◽  
Clear Differentiation ◽  
The Impact

The article analyzes the experience of the impact of the system of forest belts and mineral fertilizers on the yield of spring wheat, including on irrigated lands. Vegetation irrigation is designed to maintain the humidity of the active soil layer from germination to maturation at the lower level of the optimum-70-75%, and in the phases of tubulation-earing - flowering - 75-80% NV. However, due to the large differences in zones and microzones of soil and climate conditions and due to the weather conditions of individual years, wheat irrigation regimes require a clear differentiation. In the Volga region in the dry autumn rainfalls give the norm of 800-1000 m3/ha, and in saline soils – 1000-1300 and 3-4 vegetation irrigation at tillering, phases of booting, earing and grain formation the norm 600-650 m3/ha. the impact of the system of forest belts, mineral fertilizers on the yield of spring wheat is closely tied to the formation of microclimate at different distances from forest edges.

scholarly journals Overheating Risk and Energy Demand of Nordic Old and New Apartment Buildings during Average and Extreme Weather Conditions under a Changing Climate

2021 ◽  
Vol 11 (9) ◽  
pp. 3972
Author(s):  
Azin Velashjerdi Farahani ◽  
Juha Jokisalo ◽  
Natalia Korhonen ◽  
Kirsti Jylhä ◽  
Kimmo Ruosteenoja ◽  
...  
Keyword(s):  
Climate Change ◽  
Energy Demand ◽  
Energy Use ◽  
Residential Buildings ◽  
Weather Conditions ◽  
Extreme Weather ◽  
Living Room ◽  
Extra Energy ◽  
Cooling Unit ◽  
Indoor Conditions

The global average air temperature is increasing as a manifestation of climate change and more intense and frequent heatwaves are expected to be associated with this rise worldwide, including northern Europe. Summertime indoor conditions in residential buildings and the health of occupants are influenced by climate change, particularly if no mechanical cooling is used. The energy use of buildings contributes to climate change through greenhouse gas emissions. It is, therefore, necessary to analyze the effects of climate change on the overheating risk and energy demand of residential buildings and to assess the efficiency of various measures to alleviate the overheating. In this study, simulations of dynamic energy and indoor conditions in a new and an old apartment building are performed using two climate scenarios for southern Finland, one for average and the other for extreme weather conditions in 2050. The evaluated measures against overheating included orientations, blinds, site shading, window properties, openable windows, the split cooling unit, and the ventilation cooling and ventilation boost. In both buildings, the overheating risk is high in the current and projected future average climate and, in particular, during exceptionally hot summers. The indoor conditions are occasionally even injurious for the health of occupants. The openable windows and ventilation cooling with ventilation boost were effective in improving the indoor conditions, during both current and future average and extreme weather conditions. However, the split cooling unit installed in the living room was the only studied solution able to completely prevent overheating in all the spaces with a fairly small amount of extra energy usage.

scholarly journals Agriculture and land use in the North of Russia: Case study of Karelia and Yakutia

2020 ◽  
Vol 12 (1) ◽  
pp. 1497-1511
Author(s):  
Alexey Naumov ◽  
Varvara Akimova ◽  
Daria Sidorova ◽  
Mikhail Topnikov
Keyword(s):  
Land Use ◽  
Agricultural Development ◽  
Agricultural Land ◽  
Geographical Location ◽  
Special Role ◽  
Sources Of Information ◽  
Local Conditions ◽  
Climate Conditions ◽  
The North ◽  
The Republic

AbstractDespite harsh climate, agriculture on the northern margins of Russia still remains the backbone of food security. Historically, in both regions studied in this article – the Republic of Karelia and the Republic of Sakha (Yakutia) – agricultural activities as dairy farming and even cropping were well adapted to local conditions including traditional activities such as horse breeding typical for Yakutia. Using three different sources of information – official statistics, expert interviews, and field observations – allowed us to draw a conclusion that there are both similarities and differences in agricultural development and land use of these two studied regions. The differences arise from agro-climate conditions, settlement history, specialization, and spatial pattern of economy. In both regions, farming is concentrated within the areas with most suitable natural conditions. Yet, even there, agricultural land use is shrinking, especially in Karelia. Both regions are prone to being affected by seasonality, but vary in the degree of its influence. Geographical location plays special role, and weaknesses caused by remoteness to some extent become advantage as in Yakutia. Proximity effect is controversial. In Karelia, impact of neighboring Finland is insignificant compared with the nearby second Russian city – Saint Petersburg.

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