QUB : a fast dynamic method for in-situ measurement of the whole building heat loss

QUB is an innovative method enabling the experimental measurement of the total heat loss coefficient (HLC) of a building envelope in one night only. It is based on a simple theory, yet can be demonstrated to be accurate even in a short time and in real buildings, as long as certain experimental conditions are fulfilled. This study combines analytical and numerical approaches to exactly solve the temperature response of an equivalent building submitted to a QUB test. This allows understanding that even with a short time experiment (less than a night), a reasonable accuracy on the estimated HLC can be obtained. The experiment has to be designed following a simple heating power criterion. Calculation is then tested experimentally in various cases whether in climate chamber or in real field, and whether on light weight/not insulated building or a heavy weighte/highly insulated building. Results show that the QUB method performed by fulfilling this criterion is a promising method to estimate the HLC of a real building in the field with a reasonable accuracy in one night

Temporärer Wärmeschutz durch Rollläden mit Infrarot reflektierender Oberflächenbeschichtung

Rollläden dienen als Einbruchs- und Wetterschutz sowie als Schutz vor sommerlicher Überhitzung. Darüber hinaus reduzieren geschlossene Rollläden die nächtlichen Wärmeverluste. Bei derzeit marktüblichen Systemen lassen sich so die nächtlichen Wärmeverluste über die Fenster um bis zu 25 Prozent verringern. Infrarot reflektierende (IR) Oberflächenbeschichtungen reduzieren den Wärmeaustausch über Strahlung. Inwieweit sich durch IR-reflektierend beschichtete Rolladenlamellen das wärmetechnische Verhalten eines geschlossenen Rolladens verbessern lässt, wird durch Untersuchungen an einem Versuchsgebäude am Fraunhofer-Institut für Bauphysik (IBP) Holzkirchen analysiert

Waermeisolierendes Behaeltnis

DE 102005030310 B3 UPAB: 20070115 NOVELTY - The container has walls enclosing a cavity for the storage of food or drink. Latent heat storage material (4) is enclosed within the walls. A lightweight bearing structure (7) in the form of a grid, honeycomb or other such structure is located between the inner and outer walls (5, 6). The cavities or chambers within this structure are filled with the latent heat storage material. USE - For food or drink. ADVANTAGE - Not affected by weight of ceramic crockery