Energy retrofitting of a typical old Danish multi-family building to a “nearly-zero” energy building based on experiences from a test apartment

Morelli, Martin; Rønby, Leif; Mikkelsen, Svend Erik; Minzari, Maja G.; Kildemoes, Troels; Tommerup, Henrik M.

doi:10.1016/j.enbuild.2012.07.046

Cited by 118 publications

(90 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Examples of buildings with brick walls that have been energy retrofitted have been presented by e.g. Morelli et al [7], Weller et al [8] and Häupl et al [9]. As for Sweden, an overview of four listed retrofitted buildings from the 1940s to 1960s in Gothenburg was presented by Johansson [10].…”

Section: Introductionmentioning

confidence: 99%

Interior insulation retrofit of a historical brick wall using vacuum insulation panels: Hygrothermal numerical simulations and laboratory investigations

Johansson

Geving

Hagentoft

et al. 2014

Building and Environment

104

View full text Add to dashboard Cite

Old listed buildings need to be retrofitted to reduce the energy use for heating. The possible thickness of the insulation layer is limited by the existing construction. Vacuum insulation panels (VIPs) require less thickness than conventional insulation materials to reach the same thermal resistance. Therefore, it could be more appropriate to use VIPs than conventional insulation materials when retrofitting the building envelope of listed buildings. The aim of this study is to investigate the hygrothermal performance of a brick wall with wooden beam ends after it was insulated on the interior with VIPs. One-and two-dimensional hygrothermal numerical simulations were used to design a laboratory study in a large-scale building envelope climate simulator. The wall was exposed to driving rain on the exterior surface and a temperature gradient. The relative humidity in the wall increased substantially when exposed to driving rain. The moisture content in the wooden beams also increased. There was no significant difference between the relative humidity in the wooden beam ends for the cases with and without VIPs. However, it was found that the reduced temperature in the brick after the VIPs were added led to a higher relative humidity in the wooden beams. It was also clear that when VIPs were added to the interior, the drying capacity to that side of the wall was substantially reduced. Finally, calculations of the U-value showed a large potential to reduce the energy use using VIPs on the interior of brick walls.

show abstract

Section: Introductionmentioning

confidence: 99%

Interior insulation retrofit of a historical brick wall using vacuum insulation panels: Hygrothermal numerical simulations and laboratory investigations

Johansson

Geving

Hagentoft

et al. 2014

Building and Environment

104

View full text Add to dashboard Cite

show abstract

“…Harrestrup and Svendsen [27] done measurements of heat consumption before and after the renovation of a multi-storey building in Copenhagen with heritage value and reported reduction of heat consumption of 47 %, which proved to be within expected values. Morelli et al [28] used a multi-storey building in Copenhagen from 1896 as a case-study for three types of energy retrofit measures and concluded that the reduction of energy consumption by 68 % is achievable, but renewable energy sources are needed to achieve a "nearly-zero" energy building. Mørck et al [29] have investigated costeffective, low-energy buildings within the demonstration project Class 1 in housing community Stenloese Syd.…”

Section: Introductionmentioning

confidence: 99%

Heat supply planning for the ecological housing community Munksøgård

Karlsson

Petrovič

Næraa

2016

Energy

View full text Add to dashboard Cite

Munksøgård is a housing community near the city of Roskilde, Denmark. In 2014, Munksøgård's residents have agreed to change the existing heat supply system. The choice of future heat supply was narrowed to heat pumps, new biomass boiler and connection to nearby district heating network.The present paper compares results from techno-economic energy system analysis, simple private-economic analysis and assessment of externalities related to the heat supply and discusses the differences in conclusions -is the economic optimal solution different from a system or private-economic point of view?The techno-economic energy system analysis is done using TIMES-DTU model, which optimizes over all sectors in Denmark and all periods until 2050. The result from this model gives the least expensive solution from the overall system point of view. A spreadsheet model has been developed to do the private-economic analysis and the evaluation of external effects related to the different solutions.

show abstract

“…Nevertheless, it is possible to save large amounts of energy when using only wall insulation and installation of new windows. A well insulated building envelope is very important attaining nearly zero energy consumption levels (Morelli et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Integrated Evaluation of External Wall Insulation in Residential Buildings Using Swara-Todim McDm Method

Ruzgys

Volvačiovas

Ignatavičius

et al. 2014

Journal of Civil Engineering and Management

116

View full text Add to dashboard Cite

Abstract. A great part of energy produced in Europe is consumed by old residential buildings. Consequently, it is necessary to retrofit energetically non-efficient buildings. However, there is a mass financial gap between cost effective retrofitting and upgrading to nearly zero energy building levels. The efficiency of apartment building modernization under current requirements applicable in Lithuania and the requirements for 2020 was analysed, focusing on thermal insulation of external walls. Six cases of residential building modernization in Lithuania were studied estimating criteria that are among the most important for implementation of apartment building modernization, such as the total cost of the external wall modernization, simple payback period, work duration, and other parameters related to the characteristics of thermal insulation systems. The weights of the criteria were calculated after an expert survey and using integrated SWARA-TODIM multi-criteria decision-making (MCDM) method the best alternatives were ranked. After analyzing the differences between the current situation and upcoming requirements for rendered and ventilated type of façades, it can be stated that the final result depends more on price, duration of works, payback period, energy losses and water vapour diffusion than on the type of façade or insulation requirements applied at present or future.

show abstract

Energy retrofitting of a typical old Danish multi-family building to a “nearly-zero” energy building based on experiences from a test apartment

Cited by 118 publications

References 15 publications

Interior insulation retrofit of a historical brick wall using vacuum insulation panels: Hygrothermal numerical simulations and laboratory investigations

Interior insulation retrofit of a historical brick wall using vacuum insulation panels: Hygrothermal numerical simulations and laboratory investigations

Heat supply planning for the ecological housing community Munksøgård

Integrated Evaluation of External Wall Insulation in Residential Buildings Using Swara-Todim McDm Method

Contact Info

Product

Resources

About