Data for: Trade-off between the economic and ecological impact of different decarbonisation strategies for residential buildings

Published: 01-04-2019| Version 1 | DOI: 10.17632/8nc275rmt3.1
Contributor:
Mira Conci

Description

“E3 - A parametric model to evaluate trade-offs between the Energetic, Economic, and Environmental lifecycle performance of building projects” is a spreadsheet tool for the calculation of the environmental and economic lifecycle impact, as well as the Pareto optimal evaluation method, of strategies for residential buildings. Quantities of the building´s components (building geometry, materials or assembly types and their sizes, number of flats, number of tenants, and so on) are retrieved from technical plans. Calculation of quantities is performed according to the definitions described in DIN 277-1. Quantities and parameters for the building services components are determined by balancing all energy load (demand) profiles with energy generation profiles. Energy profiles are modelled in the E3 tool on an hourly basis (that is, using 8,790 points) for a typical year of operation. Energy load profiles determine the peak load for building services, which is used to determine each component´s required size. For photovoltaic cells and solar thermal collectors, peak load and size are constrained by the available surface. All other components can be modularly scaled to any size. Finally, energy generation profiles are used to determine primary energy use for building operation. Energy load profiles include heating energy demand, warm water demand, user power demand, and auxiliary power demand. Heating energy demand is calculated by assessing the thermal quality of the building envelope as a factor of temperature (W/K) over time (h). The thermal quality of the building envelope is found by balancing transmission losses through the building envelope and ventilation losses against solar thermal energy gains and internal heat gains. Energy generation profiles are modelled using factors to represent the efficiency of transforming a primary energy source (photons, solar thermal energy, gas, or grid power) in delivered energy (thermal energy or electricity).

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