Evaluating the alternative solutions of wall insulation by multicriteria methods

Abstract

The economic effect of buildings’ renovation largely depends on implementation of energy saving methods and devices. A very high economic effect is achieved by wall insulation. In this respect, it is even higher than the replacement of windows. The alternative solutions of wall insulation of buildings differ in the materials used, labour expenditure and other aspects. The cost of renovation depends on the solutions made. The criteria describing the available wall insulation alternatives may have different values. Moreover, they may change in different directions, i.e. a higher value of some criteria denotes a better state, while for others they mean a worse situation. In this environment, a compromise variant is required, which can be found by multicriteria evaluation methods. To reduce the effect of various methods on calculation results, it can be recommended to assess the object (or phenomenon) considered by several different methods, with a subsequent determination of the average estimate value. In this way, the disadvantages of some particular multicriteria evaluation methods could be compensated by the advantages of others. The integration of methods will be correct if there is a correlation between the values obtained by different methods.

Santrauka

Ekonominis pastatu renovacijos efektyvumas priklauso nuo energija taupančiu priemoniu igyvendinimo. Pastatu sienu sutinimas yra viena iš geriausiu priemoniu ir net efektyvesnis energijos taupymo požiūriu negu langu keitimas. Pastatu sienu sutinimo variantai skiriasi vienas nuo kito pagal medžiagas, darbo sanaudas ir pan. Nuo to priklauso renovacijos kaina. Kriterijai, atspindintys skirtingus sienu šiltinimo variantus, gali tureti ivairiu reikšmiu. Gali skirtis ju kitimo kryptys, t. y. vienu kriteriju reikšmiu didejimas padeti gerina, kitu ‐ blogina. Kompromisiniam variantui pasirinkti padeda daugiakriterio vertinimo metodai (MCDA). Norint mažinti metodu specifikos itaka skaičiavimu rezultatams, ta pati nagrinejama reiškini tikslinga vertinti keliais būdais, paskui nustatyti šio vertinimo vidurki. Tokiu atveju vienu daugiakriterio vertinimo būdu trūkumus kompensuoja kitu būdu privalumai. Metodu susiejimas bus korektiškas, jeigu reikšmes, gautos naudojant ivairius būdus, tarpusavyje koreliuoja.

Keywords:

• renovation of buildings
• wall insulation
• multicriteria evaluation
• consistency of methods

Reikšminiai žodžiai::

• pastatu renovacija
• sienu sutinimas
• daugiakriteris vertinimas
• metodu suderinamumas