PECULIARITIES ON VILNIUS MULTISTORIED HOUSING REFURBISHMENT FROM THE ENERGY EFFICIENCY ASPECT Prof. S.Raslanas, A.Gulbinas, L. Tupenaite Vilnius Gediminas.

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Presentation transcript:

PECULIARITIES ON VILNIUS MULTISTORIED HOUSING REFURBISHMENT FROM THE ENERGY EFFICIENCY ASPECT Prof. S.Raslanas, A.Gulbinas, L. Tupenaite Vilnius Gediminas Technical University

 The main purpose of this issue - to select energy efficient refurbishment measures which encourage significant energy savings as well as housing value enhancement.

1. Energy efficient refurbishment projects of apartment buildings in Vilnius  Four main investment packets are proposed: - Small investment packet - oriented to the replacement, reconstruction or repair of building elements which are in the worst technical conditions. - Medium and “basic’ investment packets - aimed at energy saving with lowest investment measures. - Large investment packet - aimed at providing the highest quality to a building, which would have the enclosures with thermal characteristics satisfying the standards, as well as possessing more advanced heating system allowing for accurate calculation of heat energy consumption and individual temperature regulation. The most expensive and hardly affordable alternative.

Investments into renovation

2. Analysis of optimal investments into apartment buildings refurbishment  Considering the optimal cost of building renovation from the perspective of its market value enhancement, the limit will be the difference between the market value of a particular building before and after renovation

Market value criterion for evaluation of refurbishment  Mvn – market value of 1 m2 of new dwelling area,  Mvo – market value of 1 m2 of old dwelling area,   – the average coefficient of correction ranging within 0.8 depending on a particular district where renovation is made.  Cr - renovation costs per 1m2.

Refurbishment efficiency in Vilnius districts

Refurbishment priorities by districts

4. Vilnius municipality programme “Renew the house – renew the city”  Vilnius city housing renovation program reflects the tasks worded in the Lithuanian housing strategy: - to improve the population‘s potential of covering the housing-related expenses, - to motivate the owners of the housing buildings to better understand their rights and duties and financial obligations in regard to community property and use of energy resources in multi-family housing buildings, - to develop the necessary incentives and conditions for the improvement of existing accommodation, with the help of its proper maintenance and renovation.

The Sample Project of Complex Building Renovation  The aim of this project is to demonstrate the benefit of complex building renovation and the effect of a neat surrounding.  The dwelling house in the Žirmūnai Street 3 was chosen according to the following criteria: - The house is in the region of high priority. According to market researches, the following regions are of high priority: Žirmūnai, Antakalnis, Naujininkai, Vilkpėdė, Lazdynai and Karoliniškės. - House renovation in this region is profitable economically. In Žirmūnai the demand of apartments is increasingly growing due to its unique location (nearby the Neris river, close to the city centre and convenient transport services) and a recent fast development of the region infrastructure (the Northtown).

House characteristic  House was built in It has 60 apartments.  Physical condition is poor, as well as of other houses of this series.  The supporting structure of the house is still suitable for further exploitation and modernization.  The thermal resistance of the walls does not meet the contemporary requirements and the joints of the slabs had been sealed up even several times during the period of exploitation.  The number of new gaps is constantly increasing.  The roof cover is old and worn; the water penetrates to the apartments of upper floors.  Most of the windows are old, not hermetic and blow off a big amount of warmth.

Renovation works  Change of windows  Glazing of balconies  Change of entrance roofs  Building insulation  Roof renovation  Adjustment of engineering systems

Renovation results  Living premises indoor temperature raised 1,1-5,7 0C and fulfilled Hygienic norms (HN:42:2004) comfort requirements.  Comparative moisture and CO2 concentration parameters fulfilled healthy environment comfort requirements.  According to theoretical calculations up to 50 percent of heating consumption costs will be saved (depending on residents’ behavior).  In comparison to non renovated analogical Žimūnai Street buildings, residents of house number 3 in Žirmūnai Street during winter saved percent of heating costs even renovation wasn’t finished yet.

Conclusions  Current state of apartment buildings in Vilnius is not satisfactory from energy efficiency and other aspects. Therefore, these houses need to be renovated.  The territorial principle of renovation should be followed, implying that the priorities of Vilnius districts requiring renovation of dwelling houses should be stated.  The renovation program should be complex including the improvement of many building components, guarantee energy saving and improvement of the surrounding territory.  In order that the market value enhancement of the renovated property would exceed the investment into its renovation, the renovation scenarios would be chosen in such a way that the average market price of renovated dwellings and the cost of renovation project would not exceed the market value of a newly-built dwelling, i.e. MVR should be more than 1.  Example of house number 3 in Žirmūnai Street proves selected renovation measures efficiency from the energy saving aspect. If this pilot project will be successful, analogous renovation projects should be implemented in other Vilnius districts.

THANK YOU FOR YOUR ATTENTION THANK YOU FOR YOUR ATTENTION !