Publications of Marie Lang
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See detailMethod for Building Model Calibration to Assess Overheating Risk in a Passive House in Summer
Abrahams, Pauline ULiege; Lang, Marie ULiege; Falzone, Claudia ULiege et al

in Proceedings of the 16th IBPSA Internation Conference and Exhibition (2019, September 03)

Overheating is a major problem that may occur, especially in high-performing buildings. The insulation thickness that is currently installed in passive houses (around 30 cm) may indeed lead to severe ... [more ▼]

Overheating is a major problem that may occur, especially in high-performing buildings. The insulation thickness that is currently installed in passive houses (around 30 cm) may indeed lead to severe overheating problems if this is some mitigated by adequate solar gains control and/or efficient ventilation schemes and strategies. This risk is expressed in percentage and calculated when the indoor temperature is above 25°C. For instance, the acceptable limit for a passive house is set at 5% over a year as defined by the Passive House Platform standard in Belgium(Vandenberghe & VanLoon, 2013). To assess overheating, dynamic simulation is a valuable approach that can be used to calculate the overheating risk and to assess the efficiency of overheating control measures. This paper presents an approach where a detailed simulation model of a passive house was developed (using TRNSYS Type 56), calibrated on the basis of measurements carried out in a typical house in Belgium and then used to compare different overheating mitigation strategies. The accuracy of the simulated model was assessed by calculating statistical indices. When the calibration results have shown a good match between measured and simulated data, the model was used in dynamic simulations to determine the best solution to reduce the risk of overheating in house under study. [less ▲]

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See detailPhytomass estimation using eMODIS NDVI and ground data in arid rangelands of Morocco
Mahyou, Hamid ULiege; Tychon, Bernard ULiege; Lang, Marie ULiege et al

in African Journal of Range and Forage Science (2018)

The assessment of rangeland productivity in semi-extensively grazed arid rangelands is a prerequisite for livestock management in relation to sustainable use of pastoral resources. The objective of this ... [more ▼]

The assessment of rangeland productivity in semi-extensively grazed arid rangelands is a prerequisite for livestock management in relation to sustainable use of pastoral resources. The objective of this study was to assess rangeland productivity based on normalised difference vegetation index (NDVI) images. Data on phytomass were measured on 61 field samples in arid rangelands of Morocco, covering various rangeland categories during autumn (November) and spring (April), i.e. when phytomass is at low and high levels, respectively, for two consecutive years (2008 and 2009). Dekadal EROS Moderate Resolution Imaging Spectroradiometer (eMODIS) NDVI data were linearly regressed to field measurements for these four periods. Results show that phytomass values were correlated with NDVI during spring, with R 2 and RMSE values of 0.82 and 0.3 t ha−1, respectively. This study indicates there is a high potential for operational use of remotely sensed data to estimate rangeland phytomass of semi-extensively grazed rangelands. [less ▲]

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See detailLIVESTOCK SYSTEMS--TECHNICAL REPORT
Minet, Julien ULiege; Diouf, Abdoul Aziz ULiege; Garba, Issa ULiege et al

Report (2015)

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