Comfort in an air-conditioned room depends to a high degree on the prevailing movement of air. As air velocities in excess of 0.1 m/sec can be regarded as draft phenomenon, a measuring device has been developed which will facilitate measurement to a sufficient accuracy and independent of any fluctuations in the air temperature even with low velocities.
The air change rate in a single story office building was measured using atracer gas technique. The air change rate was determined by the rate of decay method using sulfur hexafluoride as the tracer gas. A total of eight tests were conduc
This document reports on analytical work carried out in cooperation among three European laboratories. The purpose of this work was to carry out a first assessment on the performances of passive samplers for organic vapours when used in indoor air pollution monitoring and simultaneously to evaluate theinterlaboratory agreement on low concentration analysis of a variety of volatile organic compounds. Two types of passive samplers were thus exposed in the different facilities and replicate specimens were analysed at each of the three laboratories.
A discussion of different approaches to indoor air pollutant monitoring is presented. Indoor sampler design criteria are outlined. Grab samplers, personal samplers, passive and single-use devices, and in-situ measurement instruments are compared to novel, syringe/adsorbent tube samplers. These instruments provide automated, sequential, time-averaged collection of avariety of indoor pollutants, including hydrocarbon/halocarbon organic vapours, CO, CO2, HCOH, tobacco smoke, combustion and odorous mixtures, and particulate matter. In addition, the samplers can be used in infiltration studies.
The Harvard School of Public Health and the Energy and Environmental Policy Centre of the Kennedy School of Government, under the auspices of the Electric Power Research Institute and the Gas Research Institute, conducted a"Workshop on Evalu
The Swiss performance standard for energy conservation in buildings SIA 380/1 is explained. This standard leaves air infiltration and other detail decisions to planners if minimum performance levels are met. Calculation procedures for heat balances based on a standard occupancy are described. Tools to achieve optimum space heating and ventilation rates are explained. Instrumentation for checking the thermal performance of the house in operation is defined.
Volatile organic chemicals in indoor air of a home-for-the-elderly and a new local government office building were identified and quantified using Texax GCR samplers and capillary gas chromatography/mass spectrometry analysis. Over three hundred chemicals were tentatively identified in indoor air of thehome-for-the-elderly. Comparison of night-day levels were made. The new office building was also part of a longitudinal study which revealed a rapid decrease in levels with time for some chemicals (after completion) while others increased.
The Department of Building Technology, the Technological Institute of Copenhagen, have for several years been developing equipment for continuous measurement of air infiltration. It enables continuous measurement of air change rate in up to ten rooms, the constant concentration method with tracer gas is used, and the results are recorded on a computer diskette during measurement. Analysis of possible measuring errors show that the method is accurate and to within plus or minus 5%. Shows the results of measurement of air infiltration in 10 relatively airtight dwellings.
Discusses the mechanics of thermography, the type of instrument used and its application in building surveys. This includes the location and extent of any insulation deficiencies such as cold bridging or air leakage, and the quantification of existing thermal deficiencies.
Describes a simple device developed in the Institute for Applied Physics which is suitable for frrsh air control in air conditioned spaces. The protype instrument detects the amount of CO2 in the atmosphere on the basis of photoacoustics. Illustrates the device schematically and explains its operation.
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