Conference Agenda

Overview and details of the sessions of this conference. Please select a date or location to show only sessions at that day or location. Please select a single session for detailed view (with abstracts and downloads if available).

Session Overview
Poster introductions 09: LCA, sustainable development
Wednesday, 25/Aug/2021:
11:40am - 12:00pm

Session Chair: Prof. Umberto Berardi, Ryerson University
Location: Room 4 - Room 015, Building: 116

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11:40am - 11:43am

Investigation of the Production and Utilization Phase using the Example of a Hotel regarding the Life Cycle Assessment

Manuela Walsdorf-Maul, Michael Schneider, Sarah Melanie Engel

HTW Berlin, Germany

The construction industry has a major influence on man-made carbon dioxide emissions. Being sustainable also means reducing or neutralizing our carbon dioxide pollution in the future.

Therefore, this research and the corresponding work is guided by the following question: Is it possible and useful to conduct life cycle assessments and at the same time analyse the environmental impact of the construction sector?

In the context of this work, a life cycle assessment of a building is performed using the example of a hotel building.

All construction elements of the thermal envelope are examined from an environmental point of view by considering the global warming potential of each part of the construction.

As a result of the study a statement is to be made, which parameters are decisive for the construction of a hotel building under the aspect of ecology on the one hand in the production phase and on the other hand in the utilization phase.

Based on the results of the study, an attempt is be made to develop an approach for the "future" energy performance certificate that graphically illustrates the evaluation of buildings under both aspects - energy efficiency (final energy) and sustainability (GWP - global warming potential).

11:43am - 11:46am

Investigation of Aspects of Building Certification according to BNB for the further Development of the current Energy Certificate using the Example of an Office Building

Manuela Walsdorf-Maul, Michael Schneider, Laura Dommack

HTW Berlin, Germany

In addition to the keyword sustainability, the topic of energy efficiency is also of great importance. Since the Energy Saving Ordinance, an energy certificate is mandatory for buildings, from which information on energy consumption and thus at least part of the ancillary costs can be taken. The graphical representation of the energy classes with a scale of nine levels ranges from the best rating "A+" to the worst rating "H", with the former being shown in green and the latter in red. The average of the buildings today is in the yellow range at "E". People who move into a "B" apartment, for example, save energy and money compared to the average standard. With the introduction of new regulations in Germany, it is also new that the carbon dioxide emissions of a building resulting from the energy requirement must in future also be stated in energy certificates. This means that the energy performance certificate will contain additional information in addition to energy consumption, which is intended to reflect the impact on the climate.

In this study, the planned components of a typical office building as well as the TGA equipment is to be examined first. In addition, the aim is to optimize the building with regard to the sustainability criteria by revising the existing planning so that the "Gold" seal of approval is achieved step-by-step.

As a result, a statement is to be made as to which criteria of the building certification for achieving the "Gold" seal of approval have a major influence on the realization.

Based on the results of the investigation, an idea for the "future" energy certificate is developed, which graphically illustrates the evaluation of buildings under both aspects - energy efficiency and sustainability - from the production phase to the utilization phase and the disposal phase.

11:46am - 11:49am

Tracing Hazardous Materials in Registered Records: A Case Study of Demolished and Renovated Buildings in Gothenburg

Pei-Yu Wu1,2, Kristina Mjörnell1,2, Mikael Mangold1, Claes Sandels1, Tim Johansson3

1RISE Research Institutes of Sweden, Gothenburg, Sweden; 2Department of Building and Environmental Technology, Lund University, Lund, Sweden; 3Resources, Energy and Infrastructure, KTH, Stockholm Sweden

Hazardous materials encountered during building renovation or demolition processes not only results in uncertainty in cost estimation and lead time, but also hampers material recyclability and reuse. Therefore, the paper discusses the possibility of predicting the extent of the hazardous materials, including asbestos, PCB, mercury and CFC, through data mining techniques based on registered records. Pre-demolition and pre-renovation audits contain observation data that can be used as a sample for statistical prediction through careful processing. By developing an innovative approach of merging data from environmental inventories with building registers, the positive ratio of remaining hazardous materials in the Gothenburg building stock can be estimated. The study highlights the challenges of creating sample dataset by completing information from extant environmental inventory, providing new insight into digital protocol development for enhancing material circularity.

11:52am - 11:55am

Re-making the Energy Profile of (Irish) Market Towns, as if Science Matters.

Martin Murray

University of Ulster, Jordanstown, Ireland

CONTEXT:- nZEB policy in Ireland is a combination of cost optimality principles, with an emerging low carbon electrical grid. The policy focuses not on significantly reducing actual energy use, but on facilitating macro-generational efficiencies combined with a singular nZEB metric of micro-operational energy efficiency. Implementation defaults to generic solutions of individual electrical heat pumps serving individual buildings without measurement of the efficacy of such extensive resources use.

PROBLEM:- This policy increasingly lacks coherence when faced with the greater proportionality of embodied carbon reflected in construction materials and methodologies. Additionally, in setting it’s energy saving target too low, nZEB policy will create significant future pressures on our electrical grid and ignores the reality that all buildings now, should effectively be looking to serve our future 2050 reduction targets. The generic ‘low-carbon’ heat pump solution is valid in some contexts, however within Irish traditional market towns, where building fabric is high in embodied carbon and rich in historical patterns and morphology, the solution is not so obvious. In a more direct way, treating our future building stock as an integrated whole, related to energy context and energy grid environment is helpful in understanding optimal energy solutions.

OPPORTUNITY:- The proposed paper is an investigation into how community-based energy-saving initiatives, combined with new energy-plus developments within our historic centres, would amplify the energy importance of our building fabric. Such initiatives would re-make our planning and urban design process and increase the energy integrity and resilience of our communities. All constructions must justify their use of resources by delivering significantly greater energy performance standards, beyond nZEB, and the nonchalance by which we have demolished older buildings in the past will no longer be considered unimportant to the global carbon challenge. This creates an opportunity to remake the energy profile of our Irish market towns.

11:55am - 11:58am

Comparison of the resource and energy demand as well as the comfort of a climate-adapted and a climate-unadapted office building

Anica Jasmin Mayer, Tobias Jürgens

Technical university of munich, Germany

Due to globalisation and new technologies in the building industry, buildings are often location-independent systems, which are supposed to guarantee a pleasant indoor climate independent of climatic influences through complex technical building services. The basic principle of climate-adapted construction is the opposite pole to these climate-unadapted building methods. The primary aim is to address the outside climate by means of structural modifications in order to create a pleasant indoor climate. The technical building services are considered here as a complementary method. In this paper the demand for resources and primary energy as well as the thermal and air-hygienic comfort of a climate-adapted and an unadapted construction method are considered and compared. The aim is to determine if, despite a high use of resources for responding the outdoor climate, a climate-adapted construction method is more energy-efficient and sustainable over its entire life cycle than a climate-unadapted method. Furthermore, it is to analyse whether the maximum possible reduction of the technical building services suffers the comfort of the users. For this purpose, a representative climate-adapted and a climate-unadapted building model for the warm temperate climate zone at the Munich location is designed and compared. The primary energy and resource requirements as well as the comfort level are determined and compared by means of a simulation and by carrying out a life cycle assessment. It is shown that the primary energy demand of the climate-adapted office building is significantly lower than that of the climate-unadapted office building, even when grey energy is taken into account. The requirements for air-hygienic comfort are equally fulfilled for both buildings. The climate-adapted construction design shows a better thermal comfort. Thus, energy can be saved by a climate-adapted construction method. With regard to climate change, a climate-adapted construction method is preferable to a climate-unadapted method.

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