Review of in situ methods for assessing the thermal transmittance of walls

Bienvenido-Huertas, David; Moyano, Juan; Marín, David; Fresco-Contreras, Rafael

doi:10.1016/j.rser.2018.12.016

Cited by 105 publications

(62 citation statements)

References 122 publications

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“…In order to calculate the U-value of the Earthbag wall, a transmittance test according to [22,23] was performed. The test consists in monitoring indoor, outdoor air and indoor wall temperatures.…”

Section: Experimental U-value Calculationmentioning

confidence: 99%

Analysis of the Thermal Behavior of an Earthbag Building in Mediterranean Continental Climate: Monitoring and Simulation

et al. 2019

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Nearly 30% of humanity lives in earthen dwellings. Earthbag is a sustainable, cheap, feasible and comfortable option for emergency housing. A comparative monitoring-simulation analysis of the hygrothermal behavior of an Earthbag dwelling in Mediterranean continental climate, designed under bioclimatic criteria, is presented. The dome shape Earthbag dwelling has a net floor area of 7.07 m 2 , a glass door facing south and two confronted windows in the east and west facades. A numerical model (EnergyPlus v8.8) was designed for comparison. Twenty-four hour cross ventilation, night cross ventilation, and no ventilation in free floating mode and a controlled indoor temperature were the tested scenarios. Comparisons between experimental data and simulation show a good match in temperature behavior for the scenarios studied. Reductions of 90% in summer and 88% in winter, in the interior thermal amplitude with respect to exterior temperatures are found. Position of the glazed openings was fundamental in the direct solar gains, contributing to the increase of temperature in 1.31 • C in winter and 1.37 • C in the equinox. Night ventilation in the summer period had a good performance as a passive system. Passive solar gains made a reduction of heating energy consumption of 2.3% in winter and 8.9% in equinox.

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Section: Experimental U-value Calculationmentioning

confidence: 99%

Analysis of the Thermal Behavior of an Earthbag Building in Mediterranean Continental Climate: Monitoring and Simulation

et al. 2019

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“…The methods to characterize the thermal transmittance in vertical elements could be grouped in two typologies [32,33]: the heat flow meter method and temperature measurement methods (e.g., the thermometric method and quantitative methods of infrared thermography).…”

Section: The Heat Flow Meter Methods and Temperature Measurement Methodsmentioning

confidence: 99%

“…The heat flow meter method is included in ISO 9869-1 [32]. Among the different data analysis procedures included in ISO 9869-1, the average method is among the most used.…”

Section: The Heat Flow Meter Methods and Temperature Measurement Methodsmentioning

confidence: 99%

“…Due to this circumstance, a series of methods based on the measurement of different temperatures in the vertical element have emerged in recent years [32,33]. These methods are based on Equation (1) and should measure both the heat transfer by convection in the surface element and the radiation exchange between the internal surface and its surroundings (see Equation 2).…”

Section: The Heat Flow Meter Methods and Temperature Measurement Methodsmentioning

confidence: 99%

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Quality Control of the Thermal Properties of Superstructures in Accommodation Spaces in Naval Constructions

et al. 2020

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The application of passive design strategies in ships, such as the use of superstructures with high thermal insulation, allows the energy demand of heating, ventilation, and air conditioning systems to be reduced. There is a knowledge gap in the scientific literature on the possibilities to thermally characterize superstructures. Knowing such possibilities would make a methodology available for the quality control of naval constructions and for the inspection of the appropriate state of insulations in existing ships. For this purpose, a total of three different typologies of ship superstructures were monitored, and the data obtained were analyzed by using various existing approaches for the thermal characterization of façades: the heat flow meter method and temperature measurement methods. The results showed that the heat flow meter method constitutes a valid methodology to obtain representative results. In addition, guaranteeing a thermal gradient dependent of the wall typology and placing probes in zones not influenced by thermal bridges ensure that representative results are achieved.

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“…5. We estimated load gains or losses due to thermal bridges at 3.5% of total thermal loads [28] by thermal transmittance U of the enclosures [27,36], which were obtained on site by means of the multifunction instrument KIMO TM210 by Testo [37]. A ThermaCam P25 thermographic camera was used for detection and quantification.…”

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confidence: 99%

Underfloor Heating Using Ceramic Thermal Panels and Solar Thermal Panels in Public Buildings in the Mediterranean: Energy Savings and Healthy Indoor Environment

2019

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Radiant floor air conditioning systems based on capillary tube mats, in addition to offering high comfort standards, generate significant energy savings. They allow the use of renewable energies such as thermal solar panels and combine them with solar cooling systems based on lithium chloride or absorption systems with lithium bromide in summer, cooling water down to 15–16 °C through solar thermal panel energy collection. Thus, in addition to energy savings from the transport of low water flows, annual energy demand is also reduced. This research analyses the application of thermal ceramic panels (TCP)—containing polypropylene (PPR) tube capillary mats—to public buildings in the Spanish Mediterranean. A case study of the Museum of the University of Alicante (MUA) is presented. Water was distributed individually from a split system heat pump inside the building combined with a thermal solar panel system on the roof. The MUA’s annual energy demand was quantified using thermal simulation tools and was monitored during the entire one-year cycle. Simulations were conducted both for the radiant floor system and an all-air conventional convective system, as well as with solar thermal panel applications. The reduction in annual energy demand was 24.91% when TCP panels are used on the floor. This is a considerable value, but lower than others results obtained in Central Europe due to the higher values of humidity. When solar thermal panels are installed on the rooftop the energy savings can increase to 60.70%.

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Review of in situ methods for assessing the thermal transmittance of walls

Cited by 105 publications

References 122 publications

Analysis of the Thermal Behavior of an Earthbag Building in Mediterranean Continental Climate: Monitoring and Simulation

Analysis of the Thermal Behavior of an Earthbag Building in Mediterranean Continental Climate: Monitoring and Simulation

Quality Control of the Thermal Properties of Superstructures in Accommodation Spaces in Naval Constructions

Underfloor Heating Using Ceramic Thermal Panels and Solar Thermal Panels in Public Buildings in the Mediterranean: Energy Savings and Healthy Indoor Environment

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