Develops a calculation procedure to predict the room air temperature and heat load of Japanese housing. Includes the process to calculate natural ventilation precisely. Predicts the room air temperatures of 2 experimental houses using this method. Finds that the prediction agrees well with actual measurements.
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.
Describes energy measurements carried out on 6 detached single family low-energy houses in Hjortekaer, 1979-1980. Discusses a few typical construction details, to illustrate solutions to the problem of cold bridges and to demonstrate ways of obtaining air tight constructions. Measures the achby the tracer gas decay method, showing results ranging from 0.02-0.12 ach. Correlates these with pressurization tests also made. By means of regression analysis of thermal calibration data tests 3 different models for heat loss equations.
Tests and evaluates the air infiltration control methods employed in buildings. Concentrates especially on silicone sealant applied in situ to opening joints of external windows. Carries out tests both in the laboratory on window samples and in the field on a test building. Checks the effect of the method on air permeability through single windows and on energy loss due to air infiltration through the building envelope.
Describes a comprehensive investigation undertaken to determine the wind pressures on surfaces of models of typical low-rise buildings. For many practical applications building surfaces like facade coverings or tiled roofs are permeable. For those coverings the pressure equilibration across thepermeable surface is important when determining the net windload. Gives a survey of the physical parameters influencing the windload of permeable surface coverings. Presents results of a continuing study of the wind load on permeable facade coverings.
Tests a large office building, consisting of several octagonal towers and other blocks in a boundary layer wind tunnel. Determines the highest suction pressures which are relevant for the fixing of the cladding. Uses a tracer gas method to determine recirculation problems of the ventilation system inlets and outlets resulting from the arrangement of octagonal towers of different heights. Wind velocities on the flat roof of some towers are studied by meansof an erosion technique using flour, checks the accuracy of the method using hot wire measurements.
Uses model buildings to study external distribution of wind pressure and internal air flow. Compares air flow data with computed values derived from the pressure distribution data. Collects the pressure data obtained in a comprehensive study of wind loads on low-rise buildings and rearranges it in a form more suited to the computation of internal flows. Presents and discusses the methods emloyed in the reformulation and the results obtained. Briefly describes the development of design aids from which flow estimates could be made by simple hand calculations.
Describes a mathematical model for the calculation of the expected values of radon and radon daughter concentrations in indoor air. Presupposes that it is possible to obtain or measure the parameters necessary for the calculation eg the radon emanation of the building material, the radon content of the soil air, and the leakage of air from the soil into the building. Research in these areas is in progress both in Sweden and abroad.
Performs tracer gas measurements and fan pressurization experiments on an 8-storied student residential building in order to determine the influence of wind as well as of stack effect upon air infiltration. Compares pressure and tracer gas distributions with those from a predictive infiltration computer model for high rise buildings.
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