Provides a brief introduction to infrared theory and its application in building analysis, and describes some typical building faults that may be identified by thermographic inspection.
New energy conservation policies in New York State are emerging in response to concerns about poor indoor air quality and related public health risks. The evolution of policy has been away from the promotion of energy conservation without explic
Presents a simplified method for estimating heat consumption in buildings. The basis of the method are presented, along with an example of how to apply it. The method requires climatic data in a specific form and the way to calculate this is also discussed. Finally, gives some comparisons between results from this method and detailed computer simulations.
Describes the CO2-controlled ventilation system of the energy efficient EKONO II office building in Helsinki. An air sample is taken from a main return air duct, pumped to a CO2 analyzer which gives the message of the concentration tothe computer. The computer regulates the opening of the recirculation air and outdoor air dampers to keep the CO2 concentration in return air below a certain level. Shows fluctuation of outdoor air rate and CO2 concentration during one day.
The problems associated with the measurement of ventilation rates and air movement patterns in large single cell buildings which were unoccupied and unheated were investigated using the tracer gases nitrous oxide and sulphur hexafluoride.
Presents methods for the measurement of air flow rates, including methods for measuring flow in ducts, at exhaust and supply air devices and for air change rates for using tracer gas.
Looks at the separate requirements of ventilation and heat recovery. Discusses the energy cost of ventilation. Gives example calculations for four different situations to show how much saving an air-to-air heat exchanger can provide. Savings depend on ventilation rate, climate and energy price.
A database on the airtightness performance of houses built according to current construction practices (1980 to 82) was established, province by province, across Canada. Airtightness tests were conducted using the fan-depressurisation method and the results were compared by province, builder, house style, and house size. The survey shows considerable variation in the leakiness of the houses when the results are compared by province. Less variation in airtightness exists when the houses are compared by builder, house style, and house size on a provincial basis.
Measures air permeability of 21 facades of occupied dwellings. Investigates what proportion of air permeability is due to various gaps (moveable sections) and joints (between fixed sections) in 12 of the facades. Results show that the contribution of joints to air permeability is greater than mentioned in the Dutch Standard NEN 3661. This standard stipulates conditions with regard to the manufacture of facade elements. It is apparent that the gaps of 5 out of the 12 measured facades do not meet the minimum requirements of the standard.
A spunbonded polyolefin air infiltration barrier (AIB) was installed immediately beneath the siding of a 5 year old ranch-style house. The AIB reduced the heating energy consumption by 27% during the first heating season and is expected to reduce the heating load by 28% over the remaining life of the house.
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