Please use this identifier to cite or link to this item: http://ktisis.cut.ac.cy/handle/10488/9504
Title: In situ U-value measurements for today's Cypriot houses
Authors: Xeni, Flouris 
Eleftheriou, Polyvios 
Michaelides, Ioannis 
Hadjiyiannis, Stavros 
Philimis, Panayiotis 
Stylianou, Α. 
Keywords: Building envelope;Energy;Heat losses;U-value
Category: Mechanical Engineering
Field: Engineering and Technology
Issue Date: 1-Jan-2015
Publisher: CNE Technology Ltd
Source: International Journal of Sustainable Energy Volume 34, Issue 3-4, 21 April 2015, Pages 211-220
metadata.dc.doi: 10.1080/14786451.2014.882334
Abstract: The present work aims to establish the thermal characteristics and actual thermal behaviour of typical residential houses in Cyprus under real weather conditions. For this purpose, a wireless web-based monitoring system has been deployed covering 44 different houses, geographically spread all over Cyprus. Construction materials varied amongst each house, resulting in a theoretical U-value range of 0.467–1.389 W/m<sup>2</sup> K. Calibrated temperature sensors were installed and measurements were conducted at 30-min intervals for each individual house. The indoor air temperature of each house, the outside (ambient) air temperature, and the internal and external wall surface temperatures have continuously been monitored for a period of 15 months. Processing the above-mentioned data has led to the establishment of the mean indoor air temperature of the typical Cypriot residence and calculation of the U-value for each individual wall, facing north, south, east and west, including the roof, comprising the building envelope. Variations of the calculated U-value of up to 25% for each wall orientation were observed, even though construction materials of each wall remain the same. Furthermore, deviations of up to 30% from the theoretical U-value calculation were also observed.
URI: http://ktisis.cut.ac.cy/handle/10488/9504
ISSN: 14786451
Rights: © 2014 Taylor & Francis.
Type: Article
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