This study reports ventilation measurement and occupant questionnaire results from newly built 102 Finnish detached houses. The results show that ventilation units were used constantly and the fan speed setting was changed very seldom. There was as light tendency to use higher speed in the summer than in winter. Ventilation units provide...
The investigation of the QHA (quality community timber construction and development, registered association) compare and evaluate by the example of a built reference house the energetic and economic efficiency of current building services systems with dwelling ventilation. As basis serve gas condensing boiler...
Die Nachfrage nach Luftdichtheitsmessungen in Wohngebäuden steigt. Somit wächst auch das Interesse an Luftdichtheitsmessungen in Mehrfamilienhäusern. Die Fragen, die uns dazu oft gestellt werden, sind u.a.: - Soll das gesamte Gebäude gemessen werden oder reicht es, jede Wohnung einzeln zu messen? - Wird das...
Diese Studie berichtet über Lüftungsmessungen und die Ergebnisse von Bewohnerbefragungen von 102 neu errichteten Einfamilienhäusern in Finland. Die Resultate zeigen, dass die Lüftungsanlagen ständig benutzt wurden und die Gebläsedrehzahl-Einstellung sehr selten geändert wurde. Es gab eine geringfügige Tendenz...
Die Untersuchung der QHA (Qualitätsgemeinschaft Holzbau und Ausbau e.V.) vergleicht und bewertet am Beispiel an einem gebauten Referenzhaus die energetische und wirtschaftliche Effizienz aktueller Haustechniksysteme mit Wohnungslüftung. Als Basis dienen Gasbrennwerttechnik, Wärmepumpen...
In many urban areas, pavements and roofs constitute over 60% of urban surfaces (roof 20-25%, pavements about 40%). The roof and the pavement albedo can be increased by about 0.25 and 0.10, respectively, resulting in a net albedo increase for urban areas of about 0.1. Many studies have demonstrated building cooling-energy savings in excess of 20% upon raising roof reflectivity from an existing 10-20% to about 60%. We estimate U.S. potential savings in excess of $1 billion (B) per year in net annual energy bills.
Human has developed a board rang of passive cooling techniques in various parts of the world up to a very impressive level of maturity: cliff dwellings through the world (ground cooling), wind towers (convective and mass cooling), sprinkling water with fountains (evaporative cooling), and whitewash (sun protection). All these cooling techniques were based on careful design in which heat and mass transfer principles did not make use of any mechanical energy: they were totally passive.
This paper presents the thermal comfort levels in a bioclimaticbuilding situated in the greater Athens area in Greece. The study was carried out under transient weather conditions (autumn) by the use of the PMV-PPD model during which the central heating and coolingsystem of the building was not operational. A surveywas also conducted regarding the thermal feeling of the occupants through questionnaires according to ASHRAE standard 55-2004 for the estimation of the actual mean vote (AMV) and actual percentage of dissatisfied(APD).
As the UK Building Regulations demand better insulatedand more airtight new buildings, a potential cooling requirement is emerging in new build dwellings in the UK, leading to an increase in the market for domestic air conditioning systems in this country.At the same time, current strategies at a European and National level are starting to focus on the use of renewableand low carbon energy sources, aiming at energy security and reduction of carbon emissions.Solar thermal cooling in small scale residential applicationsis of particular interest due to the major electrical energy supply proble
Throughout architectural history, local buildings have used great in providing the most comfortable internal conditions possible within the exigencies and constraintsof local climate.In Iraqis climates, accelerating airflow through induces evaporative cooling and across spaces, ensuring that directsunshine cannot penetrate the building and the thermalcapacity of massive structure is used to insulate and take up heat during the day and release it at night when it is cooler.
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