Experimental and theoretical study on hygrothermal long-term performance of outer assemblies in lightweight passive house

Radoń, Jan; Wąs, Krzysztof; Flaga-Maryańczyk, Agnieszka; Schnotale, Jacek

doi:10.1177/1744259116686959

Cited by 14 publications

(16 citation statements)

References 7 publications

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“…operating conditions [54,55]. Also, analysis and computational simulations of thermal conditions around the ground heat exchanger [59] were carried out.…”

Section: Case Studymentioning

confidence: 99%

“…With such a limited amount of energy supply, it is easier to meet the subsequent demand by means of renewable energy sources. Currently, a significant majority of studies on PHs focus on factors such as thermal performance under various climatic conditions [37][38][39][40], life-cycle assessment (LCA) and costing (LCC) [41][42][43][44][45], comparative assessment with zero-energy buildings [26,46,47], integration of renewable energy technologies (RET) [48,49], upgrading historic buildings to the standard [50,51], investigations of building material performance [52][53][54][55], and the indoor environment [3,[56][57][58].…”

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confidence: 99%

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Thermal Comfort—Case Study in a Lightweight Passive House

2022

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Saving energy while maintaining a high-quality internal environment is an increasingly important scientific and technological challenge in the building sector. This paper presents the results from a long-term study on thermal comfort in a passive house situated in the south of Poland. The building was constructed in 2010 with the use of prefabricated, lightweight technology. The main energy source is a ground source heat pump which powers the floor heating and DHW. The building is also equipped with a mechanical ventilation system with heat recovery and a ground source heat exchanger. A lightweight building structure which has active systems with limited capabilities (especially for cooling) is a combination which increases the difficulty of maintaining a proper inner environmental condition. Extensive experimental investigations on hygrothermal performance and energy use have been carried out in the building for several years. The measurement results, such as inner air temperature and humidity, as well as the inner surface temperature of partitions, could be directly used to determine basic thermal comfort indicators, including PMV and PPD. Any missing data that has not been directly measured, such as the surface temperature of the windows, floors, and some of the other elements of the building envelope, have been calculated using WUFI®PLUS software and validated with the available measurements. These results are not final; the full measurement of thermal comfort as an applied methodology did not consider human adaptation and assumed constant clothing insulation. Nevertheless, in general, the results show good thermal comfort conditions inside the building under research conditions. This was also confirmed via a survey of the inhabitants: 2 adults and 3 children.

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“…operating conditions [54,55]. Also, analysis and computational simulations of thermal conditions around the ground heat exchanger [59] were carried out.…”

Section: Case Studymentioning

confidence: 99%

mentioning

confidence: 99%

Thermal Comfort—Case Study in a Lightweight Passive House

2022

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“…Lightweight wall constructions become recently more popular in a way of possible reduction of energy consumption [11]. Both experimental walls consist of 5 vertical sections, detailed description is in [7].…”

Section: Wall Fragment Characteristicsmentioning

confidence: 99%

Behaviour of various experimental wall fragments exposed to real climate conditions – temperature measurement

Jurasova

Juráš

2019

IRASE

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Main aim of this paper is to illustrate the experimental partial results of a study on various exterior wall fragments. The study was performed for selected wall fragments and time periods, with attention focused also on wall orientation (East and South) with identical layering and also on dynamic thermal parameters connected to the thermal comfort during summer and winter. Evaluation is done for real measured climate conditions in the area of experimental laboratory (exterior – University of Zilina) and interior conditions set according to the Slovak standard. For needs of the long-term experiment (since March 2017), temperature and relative humidity between layers are monitored. This paper deals specifically with the temperature measurement of selected days. For future publications also coupled heat-air-moisture transport analysis is intended. In this part of analysis, some extreme boundary conditions were selected and reviewed from the point of view of measured temperature inside the wall. Temperature peaks are characterized with respect to exposure to real atmospheric conditions.

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“…Investigation on the hygrothermal performance of lightweight assemblies has previously been carried out for low-energy buildings, including those seeking the International Passive House Standard certification. Long-term hygrothermal performance behavior of split-insulation exterior assemblies in an occupied house fulfilling the passive house standard under natural climatic and usage conditions in Southern Poland [8]. The hygrothermal performance of eight wall assemblies with a maximum thickness of 400 mm was measured through temperature and relative humidity sensors installed in the assemblies over a four-year period.…”

Section: Introductionmentioning

confidence: 99%

In-Situ and Predicted Performance of a Certified Industrial Passive House Building under Future Climate Scenarios

2021

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The Wood Innovation Research Lab was designed as a low energy-use building to facilitate the construction and testing of engineered wood products by the faculty and staff of the Master of Engineering in Integrated Wood Design Program at the University of Northern British Columbia in Prince George, BC, Canada. Constructed using a 533 mm thick-wall and 659 mm flat roof assembly, it received certification as Canada’s first industrial facility built to the International Passive House standard. Temperature and humidity sensors were installed in the north and south exterior wall assemblies to measure long-term hygrothermal performance. Data collected between 2018–2020 shows no record of long-term moisture accumulation within the exterior assemblies. Data collected during this time period was used to validate hygrothermal performance models for the building created using the WUFI® Plus software. Long-term performance models created using future climate data for five cities across Canada under two global warming scenarios shows favorable results, with an increase in average annual temperatures resulting in lower average relative humidity values at the interior face of the exterior sheathing board in the exterior wall assemblies.

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Experimental and theoretical study on hygrothermal long-term performance of outer assemblies in lightweight passive house

Cited by 14 publications

References 7 publications

Thermal Comfort—Case Study in a Lightweight Passive House

Thermal Comfort—Case Study in a Lightweight Passive House

Behaviour of various experimental wall fragments exposed to real climate conditions – temperature measurement

In-Situ and Predicted Performance of a Certified Industrial Passive House Building under Future Climate Scenarios

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