Technological Requirements in Energy Efficient Buildings

Technological Requirements in Energy Efficient BuildingsThe state of the art and current needs in technologies used in energy efficient buildings was assessed in the GPEE project and published in a booklet. The report aims to provide a current overview of the energy efficiency situation in buildings in the partner countries Poland and Germany. Based on several best practice examples, modern technologies such as highly efficient façade components and energy efficiency increase through building automation systems are evaluated in the report. Future trends in Poland and Germany beyond 2020 are also analyzed, leading to recommendations in line with future market developments. The assessment shows that there is a lack of information about the current energy standard of houses that calls for energy indicators which meet the demand of increasing transparency. A method to promote information is “The Building Turnaround – consulting, supporting, retrofitting” (“Die Hauswende – beraten, fördern, sanieren”), a German campaign which combines local information and consultations with the national subsidy programmes. But besides the need for information, energy efficient technology can only be implemented by qualified planners and skilled workers in this field; so there is a need for constant training of workers to assure a high quality standard during all construction and planning phases. Besides the need for information, the recycling of building components and material has to be considered as well. The aim would be to reduce the embodied energy and to reduce the waste during the construction period and at the demolition of the building.
Another big issue discussed in the report is the implementation of energy monitoring systems. Energy monitoring systems could systematically expose energy saving potentials and increase the general understanding of energy relations and dependencies of buildings. Based on this, an energy efficiency map tool was developed within the GPEE project. House owners who use the tool can document their energy consumption and will therefore be able to regularly monitor their energy usage.

You can download and read the full report here:

A Guidance on Energy Efficiency Evaluations in Commercial Buildings

A Guidance on Energy Efficiency Evaluations in Commercial BuildingsBecause the building sector is third leading in energy consumption after industry and transportation sectors there is an urgent need to increase energy efficiency of buildings. The second GPEE report aims to offer standardized methodologies to evaluate the energy efficiency of a building including whole analysis of its current energy condition, its energy spread and energy consumption, detection of most energy losses and in conclusion the suggestions for efficient energy use with regard to energy saving potential. For the GPEE project the evaluation was developed for a specific type of buildings, namely commercial buildings. Commercial buildings include offices, administrative buildings, warehouses and other non-residential buildings. The evaluation methodologies contain six main parts: Evaluation planning, data acquisition, pre-audit, on-site audit, reporting and suggestions concerning energy efficiency optimizations. All methodologies were developed in accordance with international standard norms DIN EN 16247, ISO 50001 and ISO 50002. The evaluation includes many checklists and energy performance indicators as a ratio between energy consumption and activity data. The reader gets a detailed manual on how to evaluate the energy profile of a building and how to optimize it. At last the report leads to recommendations for zero emission buildings to further reduce CO2 emissions and improve energy efficiency.

Double Criterion Optimisation of Integrated Renewable Energy Systems (RES) and Daylight Utilization / Technology, Technical Solution and Construction of Optimized, External Wall System

Double Criterion Optimisation of Integrated Renewable Energy Systems (RES) and Daylight Utilization / Technology, Technical Solution and Construction of Optimized, External Wall SystemThe basic façade construction considered in the GPEE project is a Ventilated Façade Insulation System (VFIS), optionally equipped with photovoltaic panels. The whole planning and implementation process is presented in the third GPEE report. First the concept and façade topology was assessed with the aim to set up façades for all four cardinal directions. Due to the high energy consumption and CO2 emissions of buildings the whole Life Cycle Assessment of façade panels had to be evaluated to ensure the proposed design is environmentally friendly on each level of production and use of the façade. The evaluation method chosen was MIPS, which stands for Material Intensity per Service Unit and is a concept originally developed at the Wuppertal Institute, Germany. In Lodz two façades located in west and east direction were set up on adaption of existing façades of office rooms in the university. In addition three façades located on the north, east and south of the headquarter building of Sto-Ispo in Warsaw were constructed. The results of all measurements on the two research sites show the photovoltaic façade efficiency depending on the four major orientations. The planning and construction of the PV façade is described in detail in the report including the thermal insulation. The performance of all façades in all seasons was analyzed and compared to each other.

Life Cycle Assessment of zero- emission façade construction

Magda Barecka, Dariusz Heim, Ireneusz Zbicinski (Lodz University of Technology)

Life Cycle Assessment of zero- emission façade constructionIn the research of zero- emission building design, façade solutions like ventilated panels, photovoltaic panels and phase change materials (PCM) are used in order to reduce the energy demand and the environmental impact of the façade during operational phase. However, considering all phases of the life cycle of a façade, some solutions being energy- efficient in the operational phase, may have a significant environmental impact on the production or disposal phase. Therefore, the Life Cycle Assessment (LCA) is needed in order to measure the sustainability of selected configuration of the façade. In this work, LCA was calculated for three different façade solutions: opaque insulating panel with glass finish, opaque insulating panel with photovoltaic finish and opaque insulating panel with glass finish and PCM in the insulation. The panels are to be included in an experimental façade which will be constructed within the framework of German- Polish Energy Efficiency Project. The energy gains from different façade solutions were obtained from ESP-r software (a modeling tool for the simulation of building energy performance). The LCA calculations were performed applying two tools: Material Input per Service Unit (MIPS) and Ecopoints 99 (using SimaPro software). The LCA scores, proportional to the panel surface- were used in optimization process of façade configuration to find out the most sustainable solutions and point out the environmental loads of each façade design. The results- LCA scores, show that although the panels with photovoltaic finish have 25% higher environmental impact in the production phase, the energy gains in the operational phase compensate environmental impact generated in production and disposal phase.

Life Cycle Assessment of zero- emission façade construction

Simulation Assistance and Data Analysis for the Performance Evaluation of Buildings

Nils Heinrich¹, Dariusz Heim², Dominika Knera², Anna Machniewicz²
(¹Envidatec GmbH, ²Lodz University of Technology)

Simulation Assistance and Data Analysis for the Performance Evaluation of BuildingsModern, low-energy office buildings are a composition of several advanced constructions and systems. Energy efficiency of internal units such as lighting and HVAC depends on the building operation controlled by a management system. The control of several components is usually integrated into a system connected with several detectors and user control devices. On the other hand the user behavior is a crucial factor determining energy efficiency and affecting the optimal control algorithm. Useful information for calibration of the control system can be achieved from measurements as well as from a building performance simulation. The present paper explores the analysis of building energy performance by an ESP-r based simulation approach. An evaluation of the simulation results was made in an open source energy monitoring software, by comparing the measured energy data with the simulation output. A demonstration of the case study was made by the Lodz University of Technology by using an office building of the university as testbed.

Simulation Assistance and Data Analysis for the Performance Evaluation of Buildings (IEECB'14)

To download all the proceedings visit the IEECB'14 proceedings web page here.

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