Latent Heat Phenomena in Buildings and Potential Integration into Energy Balance

Kraniotis, Dimitrios; Nore, Kristine

doi:10.1016/j.proenv.2017.03.102

Cited by 13 publications

(10 citation statements)

References 9 publications

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“…The measured RF results presented in Figure 5 and 6 shows that the relative humidity have a moderate development, similar to other studies [1,3].…”

Section: Discussionsupporting

confidence: 89%

“…In addition to reduce the carbon footprint of a building, focus on the indoor climate quality and comfort has been increasing. Wood as a hygroscopic material has the capacity to adsorb or desorb moisture and moderate the relative humidity (RH) in a building [1,2]. When moisture migrates in hygroscopic structures energy is released through latent heat phenomena, and hold a potential for contributing in the buildings energy balance [1].…”

Section: Introductionmentioning

confidence: 99%

“…Wood as a hygroscopic material has the capacity to adsorb or desorb moisture and moderate the relative humidity (RH) in a building [1,2]. When moisture migrates in hygroscopic structures energy is released through latent heat phenomena, and hold a potential for contributing in the buildings energy balance [1]. The moisture buffering capacity and latent heat of sorption of exposed CLT spruce have been investigated by [3] .…”

Section: Introductionmentioning

confidence: 99%

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Hygrothermal conditions in Cross Laminated Timber (CLT) dwellings

2020

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The use of CLT has been increasing the last decade, and a subsequently focus on documentation of the accompanying indoor climate and exposed wooden surfaces on human well-being. This study presents the results of a measurement campaign conducted over one year of a CLT apartment building in Grimstad, Norway. The apartment building consists of three floors with 35 apartments and comply with the Norwegian passive house standard and energy grade A. Measurements of the relative humidity (RH), indoor air temperature and wood moisture content (MC) were performed in the exposed CLT spruce panels in three apartments in two different floors. The results from the three apartments show a relatively small variation in the MC values regardless the residents behavior measured as RH variation through a complete year. Selected periods from a cold period (winter) and a warm period (summer) show the variation in relative humidity (RH) and moisture content in the CLT element. However, results from control measurements showed higher MC values. The gap between the measurements and methods are discussed.

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“…The measured RF results presented in Figure 5 and 6 shows that the relative humidity have a moderate development, similar to other studies [1,3].…”

Section: Discussionsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Hygrothermal conditions in Cross Laminated Timber (CLT) dwellings

2020

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“…1m). 20,21 This effect can be utilized for improving indoor thermal comfort while reducing energy consumption. Environmental humidity varies significantly over a single day as well as during changing seasons.…”

Section: Mechanism Of the Hygrothermal Effectmentioning

confidence: 99%

Passive climate regulation with transpiring wood for buildings with increased energy efficiency

et al. 2023

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“…The presence of moisture within the hygroscopic materials of a building has a significant impact on the performance of that building. By omitting this effect when predicting energy performance, annual heat loss can be underestimated [32].…”

Section: Reliability Of In-situ Measurementsmentioning

confidence: 99%

Variations in the U-Value Measurement of a Whole Dwelling Using Infrared Thermography under Controlled Conditions

et al. 2018

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U-values of building elements are often determined using point measurements, where infrared imagery may be used to identify a suitable location for these measurements. Current methods identify that surface areas exhibiting a homogeneous temperature-away from regions of thermal bridging-can be used to obtain U-values. In doing so, however, the resulting U-value is assumed to represent that entire building element, contrary to the information given by the initial infrared inspection. This can be problematic when applying these measured U-values to models for predicting energy performance. Three techniques have been used to measure the U-values of external building elements of a full-scale replica of a pre-1920s U.K. home under controlled conditions: point measurements, using heat flux meters, and two variations of infrared thermography at high and low resolutions. U-values determined from each technique were used to calibrate a model of that building and predictions of the heat transfer coefficient, annual energy consumption, and fuel cost were made. Point measurements and low-resolution infrared thermography were found to represent a relatively small proportion of the overall U-value distribution. By propagating the variation of U-values found using high-resolution thermography, the predicted heat transfer coefficient (HTC) was found to vary between 183 W/K to 235 W/K (±12%). This also led to subsequent variations in the predictions for annual energy consumption for heating (between 4923 kWh and 5481 kWh, ±11%); and in the predicted cost of that energy consumption (between £227 and £281, ±24%). This variation is indicative of the sensitivity of energy simulations to sensor placement when carrying out point measurements for U-values.

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Latent Heat Phenomena in Buildings and Potential Integration into Energy Balance

Cited by 13 publications

References 9 publications

Hygrothermal conditions in Cross Laminated Timber (CLT) dwellings

Hygrothermal conditions in Cross Laminated Timber (CLT) dwellings

Passive climate regulation with transpiring wood for buildings with increased energy efficiency

Variations in the U-Value Measurement of a Whole Dwelling Using Infrared Thermography under Controlled Conditions

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