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Publications and deliverables

MORE-CONNECT project results are widely presented during peer-reviewed international conferences. All publications are open source and available on-line:

Year 2016

  • Lupisek, A., Volf, M., Hejtmanek, P., Sojkova, K., Tywoniak, J., & Op’t Veld, P. 2016. Introduction of a methodology for deep energy retrofitting of post-war residential buildings in central Europe to zero energy level. Komunikacie, 18(4), 30-36

Abstract

Buildings are responsible for 35% of greenhouse gas emissions released in Europe. The highest potential for reduction of the environmental impacts is in the existing buildings’ energy efficiency improvement. The paper introduces a development of new methodology for a rapid deep energy retrofitting of existing buildings applicable to residential housing stock in Central Europe. It briefly describes the steps from production of building information model of existing building to complete renovation. It presents experience from pre-production phases on a case study from the Czech Republic. Technical and non-technical barriers to be solved in the near future are summarised in the discussion.

  • Ove Christen Mørck.2016. Concept development and technology choices for the More-Connect pilot energy renovation of three apartment blocks in Denmark. Energy Procedia, 2016, Vol.96, p. 738.-744. ISSN 1876-6102 http://dx.doi.org/10.1016/j.egypro.2016.09.136

Abstract

In the context of the European Horizon2020 project MORE-CONNECT on prefab deep energy renovation of dwellings pilot demonstration projects are carried out in 6 of the participating countries. In Denmark the pilot project comprises a comprehensive energy renovation of three building blocks situated in Roskilde – southwest of Copenhagen. An energy renovation concept for these buildings has been developed according to a methodology developed for the MORE-CONNECT project aiming towards a Zero Energy Building (ZEB) level. The energy requirement for heating purposes is therefore to be brought down from around 100 kWh/m2 to below 20 kWh/m2 and a part of the electricity consumption to be produced by PV. The methodology calls for a calculation of total costs versus reduced Global Warming Potential (GWP) and primary energy consumption. The developed concept includes additional insulation in the external walls and roof, new 3-layer low-energy windows, a heat recovery ventilation system and renewable energy supply. Within the MORE-CONNECT two technologies are under development in Denmark: A new PV-roof solution in which the PV-cells are fully integrated in the roofing elements. This PV-roof can be fitted into any roof surface shape and if justified by the cost-optimisation it can be constructed as a PVT-roof connected to a heat-pump for heating purposes. The second technology under development is 3-D printing of a layer of façade insulation by an industry robot. The concept development follows first a path using conventionally available technologies and at the end the two new technologies are integrated in the concept and the corresponding traditionally technologies removed. The end result is an energy renovation reaching plus-energy level at competitive costs.

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  • Piheloa P., Lelumeesa M., Kalamees T. 2016. Influence of Moisture Dry-out on Hygrothermal Performance of Prefabricated Modular Renovation Elements. Energy Procedia, 2016, Vol.96, p. 745.-755. ISSN 1876-6102 http://dx.doi.org/10.1016/j.egypro.2016.09.137

Abstract

Renovation with prefabricated modular panels is one way to achieve high energy efficiency and quality both in production and installation processes. The 5-storey building, which is being fully renovated in Tallinn, Estonia, will be insulated with prefabricated modular renovation elements. The hygrothermal performance of the envelope was evaluated with calibrated dynamic hygrothermal simulations and with a mould index model, where calculation results were in good agreement with measured data and are therefore reliable for further research. The calculations were made to evaluate the hygrothermal risks in the building envelope and after the prefabricated modular elements were installed. The focus was on studying concrete wall’s dry-out capability and the use of vapor barrier. The initial moisture content of the concrete wall and a right choice of air&vapor barrier layer has considerable impact on the entire envelope performance. As a result of this study, we claim that the risk of mould growth in this structure can be minimized, when the initial moisture content (IMC) of the existing concrete large panel element is w≤55 kg/m3 and PE-foil as air&vapor barrier is used or when IMC is w≤75 kg/m3 and the oriented strand board (OSB) as vapor control layer or when IMC is w≤110 kg/m3 and smart vapor retarder (0.2 m<Sd <5 m) on the mounted modular element as vapor control layer is used, in combination with the prefabricated modular element’s insulation, with high thermal resistance and vapor permeability (thermal resistance R≥7.5 m2·K/W; equivalent air layer thickness Sd≤0.5 m), and wind barrier (R≥0.8 m2·K/W; Sd≤0.05 m) layers. In the renovation of prefabricated concrete large panel buildings, it is possible to achieve good results and build sustainable solutions according to up-to-date requirements of nZEB in a cold and humid climate.

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  • Zemītis, J., Borodiņecs, A., Geikins, A., Kalames, T., Kuusk, K. Ventilation System Design in Three European Geo Cluster. Energy Procedia, 2016, Vol.96, p. 285.-293. ISSN 1876-6102 http://doi:10.1016/j.egypro.2016.09.151

Abstract

The primary objective of this study is to evaluate possible ventilation solutions for nZEB multi apartment buildings in three European geoclusters. Geo-cluster concept illustrates trans-national areas where strong similarities are found in terms of climate, culture, construction typologies and other factors. Paper presents comparison of ventilation needs for the same case study building located in Denmark, Estonia, Latvia and Portugal. The economic and technical comparison of different ventilation systems are presented as well. Special focus is attended to develop introduction of modular solutions and integration of ventilation ducts into external insulation as this can serve as a complex solution including both external constructions and engineering networks. Presented modular solution includes prefabricated insulation panels with integrated ventilation ducts. This paper is prepared in scope of work done within EU HORIZON2020 MORE-CONNECT project. Research methodology is based on data analysis provided by project partners as well as practical calculation. Compilation of ventilation air volume requirements according to the local regulations for Latvia, Estonia, Portugal and Denmark has shown significant difference in design air change rate in project countries. The financial analysis reveals the price difference between various ventilation strategies and provides discussion topic regarding ventilation strategies in nZEB buildings.

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  • Faltýnová, M., Matoušková, E., Šedina, J., & Pavelka, K. (2016). Building facade documentation using laser scanning and photogrammetry and data implementation into BIM. Paper presented at the International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences – ISPRS Archives, , 41 215-220. doi:10.5194/isprsarchives-XLI-B3-215-2016

Abstract

A project started last year called MORE-CONNECT, which focuses on the renovation of buildings (especially building facades) using prefabricated elements. The aim of this project is to create a competitive solution consisting of a technology and processes which enable fast, cost-effective renovation with minimal difficulties to inhabitants. Significant cost savings in renovation costs lies in the usage of prefabricated elements and the reduction of construction works on site. The precision of the prefabricated element depends on the precision of the construction, project and building documentation. This article offers an overview of the possible methods for building documentation and spatial data transfer into BIM (Building Information Modelling) software. The description of methods focuses on laser scanning and photogrammetry (including RPAS based), its advantages, disadvantages and limitations according to the documented building, level of renovation, situation on site etc. The next part involves spatial data transfer into BIM software. A proposed solution is tested in a case study.

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  • Pihelo, P.; Lelumees, M.; Kalamees, T. Potential of Moisture Dry-out from Concrete Wall in Estonian Climate. International RILEM Conference on Materials, Systems and Structures in Civil Engineering. Conference segment on Moisture in Materials and Structures. 22-24 August 2016, Lyngby, Denmark

Abstract

The efficient way to meet the nearly zero energy buildings (nZEB) design ideology – remarkable reduction of heat losses – is to build highly insulated buildings. This study observes the hygrothermal performance of prefabricated concrete large panel element of a multi-storey building, planned to be renovated according to nZEB requirements. The validated calculation program Delphin was used to calibrate the calculation model. On the basis of measured data, the model was calibrated and calculations were made to evaluate the hygrothermal risks. The analysis showed that the hygrothermal performance of concrete wall is most dependent on constructional moisture content, dry-out capability and wind-driven rain load as well as on the N-E-S-W orientation of the wall. The results showed the highest moisture content in the wall’s external concrete slab on south-west direction in the last quarter and the first months of the year, when the moisture content was 110-114 kg/m3. This study showed that in the design of highly insulated concrete walls in cold and humid climate it is important to properly evaluate the initial state of constructions and consider critical weather loads in order to determine the feasible hygrothermal performance.

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  • Kalamees, T., Lupíšek, A., Sojková, K., Mørck, O., Borodiņecs, A., Almeida, M., Rovers, R. What kind of heat loss requirements NZEB and deep renovation sets for building envelope?. In: CESB 2016 – Central Europe Towards Sustainable Building 2016: Innovations for Sustainable Future, Czech Republic, Prague, 22-24 June, 2016. Prague: Grada Publishing, 2016, pp.137-144. ISBN 978-802710248-8.

Abstract

In most of countries, the energy performance of buildings is defined as (primary) energy use of whole building’s (heating, cooling, ventilation, DHW, lighting, HVAC auxiliary, appliances), not as specific requirements for building envelope. For construction companies of production of modular renovation panels it in necessary to know heat loss properties of building envelope (U, W/(m2K); ‘P. W/(mK): x. W K; qso, m3/(hm2)). In this study, it is analyzed what kind of heat loss requirements exist for building envelope to meet on annual basis to following targets: nZEB i.e. national nearly zero energy definition; deep energy renovation with 80 % reduction of primary energy; ZEB i.e. net Zero Energy Building = the annual primary energy use = 0 kWh/(m2 a). Indoor climate and energy calculations were made based on national energy calculation methodologies in six countries: Denmark, Estonia. Latvia, Czech Republic, Portugal, and the Netherlands. Requirements for heat loss of building envelope vary depending on requirements on indoor climate and energy performance in specific country, outdoor climate, availability of renewable energy, and building typology. The thermal transmittance of the modular wall panels for nZEB was 5% from pre-renovation thermal transmittance in Latvia, 10% in Estonia and up to 50% in Portugal. For roof, the decrease of thermal transmittance was smaller mainly due to smaller thermal transmittance before renovation. Results show the difficulties to reach ZEB with multi-story apartment buildings in cold climate. There are not enough places to install renewables for energy production on site.

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  • Borodiņecs, A., Zemītis, J., Millers, R., Tumanova, K., Geikins, A., Nefedova, A. Specifics of Multi-Apartment Building Deep Complex Retrofitting. In: CESB 2016 – Central Europe towards Sustainable Building 2016: Innovations for Sustainable Future, Czech Republic, Prague, 22-24 June, 2016. Prague: Grada Publishing, 2016, pp.49-55. ISBN 978-802710248-8.

Abstract

The paper presents study on existing building stock energy consumption for country of LaLvia. Especial attention is paid to the analysis of typical Soviet type multi-apartment buildings’ specifics. The study analyses theoretical as well as real measured multi-apartment building heat consumption before and after renovation. Based on dynamic simulation precise energy balance was calculated for typical multi-apartment building. Results shown that simple thermal insulation of building insulation can ensure 50% reduction of building heat consumption. however, practical measurements have shown significant increase of indoor air relative humidity and CO2 concretion level. Evaluation of cost effective deep complex retrofitting solutions should take into account not only theoretical heat losses/heat gains but also human behavior. Paper does not take into account primary energy. Primary energy factors varies in EU countries. In some case primary energy factors was assumed without clear methodology. Thus, comparison of reduction of primary energy consumption in building stock could be incorrect.

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  • Kuusk K., Kalamees T., Pihelo P. Experiences from Design Process of Renovation of Existing Apartment Building to nZEB. CLIMA 2016 – proceedings of the 12th REHVA World Congress: volume 1. Aalborg: Aalborg University, Department of Civil Engineering, May 2016, p. 10.

Abstract:

Toughening requirements for energy efficiency of buildings sets the new challenges to the building owners, designers and contractors. Although nZEB requirements will apply only to the new buildings, Tallinn University of Technology decided to renovate existing student hostel building to nZEB building. Building has same typical problems as many other existing buildings: high energy consumption, insufficient ventilation, overheating during winter, insufficient thermal comfort. Need for major renovation is evident but goal to renovate this building to nZEB building have raised many new challenges. Somewhat surprisingly chose challenges were not so much related to the specific technical problems but more to the overall understanding of the concept of nZEB and managing the design process in order to guarantee that the end result is nZEB building. In general, building owner is in favour of the nZEB, but nZEB renovation should not mean excessive investment costs. Therefore, designers have new challenge to devise nZEB renovation in such way that it is not significantly more expensive than standard major renovation. Our experience revealed that designers have not yet fully understood the whole concept of nZEB buildings and have some difficulties managing the design process in parallel with the energy calculations and cost optimality calculations. The solution which is often used that energy calculations just one solitary part of the design process is no longer suitable in concept of nZEB renovation. Energy calculations and cost optimality calculations must be used in parallel with designing the technical solutions already in the early stage of design.

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  • Op’t Veld P., Kalamees T., Rovers R. MORE-CONNECT: New developments in prefabricated multifunctional building envelope elements and installation platforms for NZE renovation. CLIMA 2016 – proceedings of the 12th REHVA World Congress: volume 1. Aalborg: Aalborg University, Department of Civil Engineering, May 2016, p. 10

 Abstract:

Objective of the H2020 project ‘MORE-CONNECT’ is to develop and to demonstrate technologies and components for prefabricated modular renovation elements in five geo-clusters in Europe (The Netherlands, Denmark, Estonia/Latvia, Czech Republic, Portugal). MORE-CONNECT is based on three main innovations: product, process and market innovation. Product innovation includes prefabricated innovative, modular composed building envelope elements, including the integration of multifunctional components for climate control, energy saving, building physics and aesthetics, with advanced plug & play connections (mechanical, hydraulic, air, electric, prefab airtight joints) for ultrafast installing, limiting the total renovation time of 5 to 2 days. Process innovation includes a fully automated productions process, starting with digital imaging using advanced geomatics, on-line configuration of the renovation concepts by end-users and a fully automated BIM controlled production process. This process offers the possibility to produce ‘series of one’ in a mass production process. Market innovation includes the offering of a one-shop-stop concept to the end-user, i.e. the end-user deals with only one responsible party organizing the design, production, installing, financing, performance contracting and after care. A performance guarantee is offered for individual energy use and the quality of the indoor environment. Web based tools will link building characteristics, building energy potential and end-users demands.

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Year 2015

  • Peter Op ‘t Veld, MORE-CONNECT: Development and Advanced Prefabrication of Innovative, Multifunctional Building Envelope Elements for Modular Retrofitting and Smart Connections. Energy Procedia, Volume 78, November 2015, Pages 1057-1062, ISSN 1876-6102

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  • Kuusk, K., & Kalamees, T. (2015). nZEB retrofit of a concrete large panel apartment building. Paper presented at the Energy Procedia, , 78 985-990. doi:10.1016/j.egypro.2015.11.0

Abstract

The paper discusses energy renovation scenarios from major renovation to nZEB level for apartment buildings in Estonia (cold climate). The study analyses energy usage and economic viability taking into account a possible increase in the lease income after renovation under apartment building renovation scenarios. Our results show that deep renovation of old apartment buildings enables the energy performance requirements of nearly zero energy apartment buildings to be achieved. With nZEB renovation, reductions are ca 70% in delivered energy (heating energy + electricity) need and ca 60% in primary energy need. Payback period of nZEB renovation without increased lease income is around 30 years. In the best scenario case, the payback period of nZEB renovation is around eight years when the increase of the annual lease income is taken into account. © 2015 The Authors.

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