Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Impacts of airtightening retrofits on ventilation rates and energy consumption in a manufactured home
Highlights ► We examine the impact of airtightening on air changes and energy in a house. ► The retrofits decrease the air change rates significantly. ► The retrofits also impact the dependence of air changes on fan operation and weather. ► A multizone airflow model predicts the air change rates after the retrofits.
Abstract A retrofit study was conducted in an unoccupied manufactured house to investigate the impacts of airtightening on ventilation rates and energy consumption. This paper describes the retrofits and the results of the pre- and post-retrofit assessment of building airtightness, ventilation, and energy use. Building envelope and air distribution systems airtightness were measured using fan pressurization. Air change rates were measured continuously using the tracer gas decay technique. Energy consumption associated with heating and cooling was monitored through measurement of gas consumption by the forced-air furnace for heating and electricity use by the air-conditioning system for cooling. The results of the study show that the retrofits reduced building envelope leakage by about 18% and duct leakage by about 80%. The reduction in the house infiltration rates depended on weather conditions and the manner in which the heating and cooling system was controlled, but in general these rates were reduced by about one third. The energy consumption of the house for heating and cooling was reduced by only about 10%, which is relatively small but not totally unexpected given that infiltration only accounts for a portion of the heating and cooling load.
Impacts of airtightening retrofits on ventilation rates and energy consumption in a manufactured home
Highlights ► We examine the impact of airtightening on air changes and energy in a house. ► The retrofits decrease the air change rates significantly. ► The retrofits also impact the dependence of air changes on fan operation and weather. ► A multizone airflow model predicts the air change rates after the retrofits.
Abstract A retrofit study was conducted in an unoccupied manufactured house to investigate the impacts of airtightening on ventilation rates and energy consumption. This paper describes the retrofits and the results of the pre- and post-retrofit assessment of building airtightness, ventilation, and energy use. Building envelope and air distribution systems airtightness were measured using fan pressurization. Air change rates were measured continuously using the tracer gas decay technique. Energy consumption associated with heating and cooling was monitored through measurement of gas consumption by the forced-air furnace for heating and electricity use by the air-conditioning system for cooling. The results of the study show that the retrofits reduced building envelope leakage by about 18% and duct leakage by about 80%. The reduction in the house infiltration rates depended on weather conditions and the manner in which the heating and cooling system was controlled, but in general these rates were reduced by about one third. The energy consumption of the house for heating and cooling was reduced by only about 10%, which is relatively small but not totally unexpected given that infiltration only accounts for a portion of the heating and cooling load.
Impacts of airtightening retrofits on ventilation rates and energy consumption in a manufactured home
Nabinger, Steven (Autor:in) / Persily, Andrew (Autor:in)
Energy and Buildings ; 43 ; 3059-3067
27.07.2011
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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