IBPSA2009

Control of daylight level using slatted blinds is an effective means of energy saving. But proper judgment on the presence of direct sunlight is indispensable. Lack of a function to disable blind controls in non-existence of direct sunlight may cause dissatisfaction about the view through windows among users of building. Therefore, this study was conducted with the aim of setting threshold values based on daylight conditions so that automatic controls are disabled and slats are horizontalized when direct sunlight is non-existence. 

In this paper, indoor thermal environment of the Terminal 1 of Chengdu Shuangliu International Airport (CSIA) is taken as study object, by means of investigating, measuring and simulating based on computational fluid dynamics (CFD) codes. A total of 569 participants provided 569 sets of physical data and subjective questionnaires, and an indoor thermal comfort meter was used to collect the measured parameters of the indoor environment and the predicted mean vote (PMV). The accepted thermal comfort environment range is obtained.

A detailed model of the Net Zero Energy Town House in Toronto is developed in TRNSYS. The incorporation of thermal mass into the building envelope has been demonstrated to contribute to the enhancement of occupant comfort through the reduction of indoor temperature fluctuations. It has also been shown to cause a decrease in the overall energy consumption associated with the heating and cooling of buildings. The incorporation of a variety of thermal mass such as a concrete slabs and phase change materials (PCM) into the building envelope is modelled.

Lack of attention to the early design process in relation to Environmental Impact Assessment (EIA) has lead to an unsustainable built environment. Often building auditing/monitoring utilising EIA and Life Cycle Cost Assessment (LCCA) tools are used after the completion of the project, when it is too late to influence the design, materials or components to be used. A sub-processes focusing on environmental issues at early design process based on the UK construction process guideline- Royal Institute of British Architect (RIBA) work stages has been developed.

This paper describes the development, demonstration and validation of an award-winning, domestic energy, carbon-counting and carbon-reduction model (DECoRuM) with the capability of measuring, modelling and mapping energy-related CO2 emissions from existing UK dwellings and aggregating them on a local scale. This enables DECoRuM to assess the cost-benefits of deploying a wide range of best practice energy efficiency measures, low carbon technologies and solar energy systems. The capabilities of DECoRuM are demonstrated by applying it to a case study in Oxford, covering 318 dwellings.

The driving force of the thermal regulations revision in the European Union (EU) was the European Energy Performance of Buildings Directive – EPBD (European Commission, 2003).

This paper presents the development of an energy and carbon model of existing dwellings and its application to urban housing. The model is used to predict the energy use and CO2 emissions of the housing stock of the city of Leicester, UK, and to estimate the effect of energy efficiency interventions. It is shown that a high level of energy efficiency interventions has the potential to reduce overall CO2 emissions by around 41%. The model methodology is discussed and potential improvements are explored.  

The paper describes the simulation model for the prediction of the dynamic behavior of the complex system. The system includes as the main element the energy saving projects together with the elements from the environment. The solution is based on the application of system dynamics that is useful method for the simulations in the field of socioeconomic systems. The relevant elements are oil price changes, energy distributor goals and a state policy in the field of the energy savings.

In this paper, energy saving potential utilizing the heating effect of solar radiation is analyzed by simulation. The dynamic simulation software “THERB1)” is used, and the effect of solar radiation on energy saving is explained for several simulation conditions. In addition, the heating load of energy-efficient housing is compared with that of standard housing. 

Climate change is now recognized as a prime challenge of the 21st century. It is increasingly clear that there is a need to take action in order to adapt specific buildings to changing circumstances, in a cost-effective way. This paper presents the results of the first step of an EPSRC-funded research project that aims to manage the thermal risks in buildings subject to climate change, employing building simulation (coupled with uncertainty analysis) to quantify these risks, their consequences, and risk abatement options.