Learnings Networks and Professional Development in Building Energy Management Systems Industry

The energy management systems industry in the built environment is currently an important topic. Buildings use about 40% of the total global energy worldwide. Therefore, the energy management system’s sector is one of the most influential sectors to realize changes and transformation of energy use. New data science technologies used in building...

Impacts of on-board monitored data on estimated thermal characteristics of a dwelling

After the thermal renovation of a dwelling, there exists a gap between the actual and predicted energy performance. One of the reasons contributing to this gap is the poor assumptions of building thermal characteristics during the prediction stage. Nowadays, smart meters for gas and electricity, and home automation systems are becoming...

Indoor environmental quality related risk factors with energy-efficient retrofitting of housing: A literature review

There are indications that energy-retrofitted buildings can create risks for indoor environmental quality (IEQ) and therefore for health and comfort of occupants. A review was conducted to identify and verify those risks, within three themes: building envelope, heating, ventilating and air conditioning (HVAC)-systems, and occupants. Publications...

Automated in-situ determination of buildings’ global thermo-physical characteristics and air change rates through inverse modelling of smart meter and air temperature data

The advancement of smart metering and sensor technologies has opened the door to performing extensive in-situ measurements in buildings and a tendency to carry-out detailed energy and indoor climate monitoring, leading to the availability of the so-called “on-board monitoring data”. The data obtained through these measurements is of high...

In-situ rapid determination of walls’ thermal conductivity, volumetric heat capacity, and thermal resistance, using response factors

Accurate determination of walls' thermo-physical characteristics is a necessity for execution of energy conservation strategies in existing buildings. In practice, such data is not available because the current determination methods are time expensive and therefore rarely used. Based on the theory of Response Factors, a rapid transient in...

Properties of the triangular excitation pulse and the 3D heat transfer effects in the excitation pulse method

Concerning the high levels of energy consumption in the existing building stock, the necessity for characterization of the building envelop is a well-known issue. Accordingly, numerous methods and practices have been developed and studied to measure the thermal resistance and other thermal characteristics of the walls in-situ. In the current...

Quicker measurement of walls' thermal resistance following an extension to ISO 9869 average method

Determination of the thermo-physical characteristics of the buildings' components is crucial to illustrate their thermal behavior and therefore their energy consumption. Along the same line, accurate determination of the thermal resistance of the building walls falls into one the most important targets. Following the difference between in-lab...

In-situ real time measurements of thermal comfort and comparison with the adaptive comfort theory in Dutch residential dwellings

Indoor thermal comfort is generally assessed using the PMV or the adaptive model. This research presents the results obtained by in-situ real time measurements of thermal comfort and thermal comfort perception in 17 residential dwellings in the Netherlands. The study demonstrates the new possibilities offered by relatively cheap, sensor-rich...

In-situ characterization of walls’ thermal resistance: An extension to the ISO 9869 standard method

Accurate and reliable in-situ characterization of buildings’ thermal envelope is of high significance to determine actual energy use and thermal comfort. In this context, walls’ thermal resistance is one of the most critical properties to be identified. Regardless the numerous studies being carried out to accurately measure the actual thermal...

In-situ and real time measurements of thermal comfort and its determinants in thirty residential dwellings in the Netherlands

Reducing energy consumption in the residential sector is an imperative EU goal until 2020. An important boundary condition in buildings is that energy savings shouldn’t be achieved at the expense of thermal comfort. There is, however, little known about comfort perception in residential buildings and its relation to the PMV theory. In this...

Rapid, transient, in-situ determination of Wall’s thermal transmittance

Large deviations observed between actual and theoretical gas consumption in dwellings cast a shadow of doubt on the accuracy of the Energy Labeling method. Generally, such problem can stem from two different aspects: the calculation system and the inputs being fed. As one of the most critical parameters, the thermal transmittance U-value has...

Integral environmental assessment of maintenance scenarios in the existing housing stock

Verwarmingsenergie: Hoe groot is de invloed van bewoners?

Door de introductie van de EPC-regelgeving, de verbetering van constructiemethoden en van installatierendementen, wordt verwacht dat de verwarmingsenergie in woningen afneemt. Daardoor zou de invloed van bewonersgedrag op het energiegebruik steeds belangrijker worden. Dit artikel gaat in op de resultaten van statistische onderzoeken.

LCA-based scenario study of housing maintenance: Energy or materials?

Duurzaamheid en klimaatverandering: Hoe verder?

Hoogbouw

Milieueffecten van renovatie activiteiten