Search

The goal of this research is to develop ecologically and economically optimized implementation strategies for social housing. Therefore, a case study is analysed over its life cycle using life cycle assessments (LCA) and life cycle costs (LCC) regarding the global warming potential (GWP) and its environmental impact costs (cost per ton of CO2). The case study is optimized regarding the embodied emissions of construction and energy demand during its use stage. Considering the cost ceiling for social housing, it is evident, that an implementation of renewable materials and energies is mandatory in order to prevent the risk of a project failure due to excessive environmental impact costs.

The HoEff-CIM-project aims at developing automated inventory and evaluation tools, which support portfolio managers to plan and perform energy efficiency measures within large properties, considering their highly heterogeneous usages and structural specifications. The project covers models and tools, which facilitate the assessment of existing building stocks and the recognition of state of the art energetic reliance and renovation concepts. These concepts are then automatically adapted to different structural, technical and usage dependent parameters. The tools will help to analyse building physics and building services but also to empower strategic planning and energy distribution schemes. Therefore, an intuitive dataflow was needed that streamlines the process from data acquisition (building inspection), evaluation of buildings and renovation measures to the elaboration of specific building energy reports; all resulting in master plans for building complexes as well as systematic renovation strategies for larger properties. Particular emphasis was put on the determination of joint influences of building construction and building services on potential energy savings. Accompanying this quantification process, uncertainty and sensitivity analyses have been performed via Bayesian Network theory and statistical analytics. Different renovation concepts have been analysed, modelled and evaluated regarding their energy saving potential, usability as well as ecologic features. A ranking system was developed to assess specific energy demands of different building usages and to identify the most effective renovation measures. The result is a fully transparent, interactive and easy to understand decision-making methodology. The holistic approach contributes to create climate neutral building stocks and consequently to reach the energy saving and environmental goals defined by national and international governmental institutions (e.g. EED).

The aim of this study is to compare and validate a building energy simulation model of a university building with monitored data. In addition, different building services engineering concepts are compared with each other regarding their ecological life cycle-based performance using Life Cycle Assessment (LCA) methods. Optimizing these performances regarding sustainability indicators plays an essential role in realizing a climate-neutral building stock. A university building from the 90s, which consists of almost 900 thermal zones, is used as a case study. Detailed heating consumption data are available for the inspected building and are compared to the simulation results. Different energy supply concepts are first subjected to conducting LCA and then to a detailed energy performance simulation. This paper presents a procedure that enables decision-makers to examine building services engineering issues and to derive conclusions in a time-saving manner regarding appropriate sustainable actions. The focus on sustainable energy supply systems is an essential milestone for the realization of climate-neutral building stocks. The scientific innovation is in the detailed reproduction of the existing building and the comparison between simulation data and real-time data as well as an innovative and experimental approach to building and Heating, ventilation, and air conditioning (HVAC) system simulation.

This paper aims to investigate the impact of future climate on building systems, taking account of a strict building standard. A building is modelled in TRNSYS regarding a sustainable heating and cooling energy production by solar heating and radiative cooling in combination with water storage tanks. Sensitivity analyses (Morris Method) are performed for the technical building configurations for the years 2030, 2050 and 2100 (REMO climate model). They are compared and evaluated with the current reference climate (TRY) of 2017. The objective is to show which components have a significant influence on the energy consumption of buildings. Furthermore, due to the climate change sustainable building technologies are necessary. This paper demonstrates how the influence of the climate can be counteracted from the perspective of building services. Global warming requires a rethink of the interaction between building design, building technologies and climate. In this point building services engineering offers the most flexibility. By performing parameter studies, early knowledge about the building and its required technology can be gained. The target value of this study is the indoor air temperature as a function of the outdoor temperature. The objective function corresponds to specifications according to the European standard EN 15251. Following the parameter studies, optimization processes are carried out.