Suchergebnisse

Energies Vol.6 Nr.1, 235 - 250 ; Building energy efficiency legislation has traditionally focused on space heating energy consumption. This has led to a decrease in energy consumption, especially in space heating. However, in the future when more renewable energy is used both on site and in energy systems, the peak energy demand becomes more important with respect to CO2 emissions and energy security. In this study it was found out the difference between space heating energy consumption was 55%-62% when a low energy and standard building were compared. However, the difference in peak energy demands was only 28%-34%, showing the importance of paying attention to the peak demands as well.

Sustainability Vol.2 Nr.3, 844-858 ; Traditionally, the Finnish legislation have focused on energy use and especially on energy used for heating space in buildings. However, in many cases this does not lead to the optimal concept in respect to minimizing green house gases. This paper studies how CO2 emission levels are affected by different measures to reduce energy use in buildings. This paper presents two real apartment buildings with different options of energy efficiency and power sources. The calculations clearly show that in the future electricity and domestic hot water use will have high importance in respect to energy efficiency, and therefore also CO2 equivalent (eq) emissions. The importance increases when the energy efficiency of the building increases. There are big differences between average Finnish production and individual power plants; CO2 eq emissions might nearly double depending on the energy source and the power plant type. Both a building with an efficient district heating as a power source, and a building with ground heat in addition to nuclear power electricity as a complimentary electricity source performed very similarly to each other in respect to CO2 eq emissions. However, it is dangerous to conclude that it is not important which energy source is chosen. If hypothetically, the use of district heating would dramatically drop, the primary energy factor and CO2 eq emissions from electricity would rise, which in turn would lead to the increase of the ground heat systems emissions. A problem in the yearly

Decision-makers in the architecture, engineering, and construction (AEC) industry lack knowledge about the implementation of digitalisation to generate value. We applied a scenario planning method developed by Schoemaker and Mavaddat to provide decision-makers with information for using digital data and technologies to create value for customers. We aim to theoretically understand how the scenario planning process helps AEC decision-makers to make sense of the future. Our findings show that boundary spanners are needed for steering the discussions among industry actors toward shared knowledge about the technological, social, economic and political changes needed at the industry level to optimise the benefits of digitalisation. Our findings also show that boundary spanners apply scenario figures as boundary objects to cross knowledge boundaries. Based on our findings, we theoretically conceptualise scenario planning as a boundary-spanning activity that enables AEC decision-makers from different fields to sharetacit knowledge and to cross knowledge boundaries. The practical implication is that scenario planning provides a method for AEC decision-makers to make sense of the changes needed to realise the preferred future for the industry. ; Peer reviewed