ENERGI- OCH KOSTNADSEFFEKTIVAMATERIALVAL I VÄRMESYSTEM : En jämförelse av rörmaterial i vattenburna värmesystem

Sammanfattning: The thesis aims to compare differentpiping materials in heating systems interms of cost as well as to illustratethe impact of energy characteristics ofdifferent materials over its servicelife. The methods used for costcalculations regarding piping are alsoto be examined to highlight thedifferences between template basedcalculations and more carefully executedones. The work is delimited to discusspipes of steel, copper, plastics andcomposites. The aim is that the resultcan be compiled to illustrate the prosand cons of various materials whenevaluating investments.The main object of the survey is part ofa heating system in the office-block KVSommaren located in southern Stockholm.The configured piping system is designedwith the mentioned piping materials andis used to make up the data for flow andcost calculations. The differentmaterials are calculated in both aconventional manner with a supplementarycost for additional fittings and with amore accurate quantification of thecomponents. Both are then compared inorder to assess how they differ from oneanother. Supplier data and buildingproduct declarations are used fordetermining energy properties concerningproduction, transportation and recyclingopportunities.The study indicates that the moderncomposite material AluPEX results in alower investment cost and therefore isthe most appropriate material providedthat it maintains its function under theintended service life. It is also clearthat the methods used for costcalculations differ from each other andthat the template based calculations canbe avoided by rather simple means. Theeffects of emphasizing the differentenergy properties of the materials in acost calculation can be consideredsmall. However, it illustratesproperties which may eventually becomeof great importance.