Abstract
This thesis Deals with two different models for the description of a flow system and methods for the identification of these models using tracer gas measurements. The methods have been tested in extensive experiments in four single family houses. The idealized multi zone model - which consists of one or more perfectly mixed zones which may be coupled with the flows - has been used to determine air flows and ventilated volumes in single family houses. The most straightforward method of describing a flow system is by its weighting function which expresses the relationship between the injection of tracer gas at one point and the concentration of tracer gas at another points. The main problem in modelling by using the weighting function is that the present method does not include infiltration in the calculations, but regards it as a residual item. Field measurements show that the tracer gas methods used provide valuable knowledge of how the ventilation system in a single family house works. Nor it is possible to acquire this knowledge without tracer gas measurements. However, one essential limitation of the tracer gas method is that it is a tool which described only the present situation. It is difficult
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Citation Formats
Hedin, B.
Tracer gas measurement techniques. Active methods to identify volumes, air flows, flow paths and flow patterns in single family houses; Maetteknik med spaargas. Aktiva metoder foer bestaemning av volymer, luftfloeden, floedesvaegar och stroemningssaett i smaahus.
Sweden: N. p.,
1994.
Web.
Hedin, B.
Tracer gas measurement techniques. Active methods to identify volumes, air flows, flow paths and flow patterns in single family houses; Maetteknik med spaargas. Aktiva metoder foer bestaemning av volymer, luftfloeden, floedesvaegar och stroemningssaett i smaahus.
Sweden.
Hedin, B.
1994.
"Tracer gas measurement techniques. Active methods to identify volumes, air flows, flow paths and flow patterns in single family houses; Maetteknik med spaargas. Aktiva metoder foer bestaemning av volymer, luftfloeden, floedesvaegar och stroemningssaett i smaahus."
Sweden.
@misc{etde_10114482,
title = {Tracer gas measurement techniques. Active methods to identify volumes, air flows, flow paths and flow patterns in single family houses; Maetteknik med spaargas. Aktiva metoder foer bestaemning av volymer, luftfloeden, floedesvaegar och stroemningssaett i smaahus}
author = {Hedin, B}
abstractNote = {This thesis Deals with two different models for the description of a flow system and methods for the identification of these models using tracer gas measurements. The methods have been tested in extensive experiments in four single family houses. The idealized multi zone model - which consists of one or more perfectly mixed zones which may be coupled with the flows - has been used to determine air flows and ventilated volumes in single family houses. The most straightforward method of describing a flow system is by its weighting function which expresses the relationship between the injection of tracer gas at one point and the concentration of tracer gas at another points. The main problem in modelling by using the weighting function is that the present method does not include infiltration in the calculations, but regards it as a residual item. Field measurements show that the tracer gas methods used provide valuable knowledge of how the ventilation system in a single family house works. Nor it is possible to acquire this knowledge without tracer gas measurements. However, one essential limitation of the tracer gas method is that it is a tool which described only the present situation. It is difficult to generalize the results to cover that happens when conditions change, e.g. when the house is made more airtight, when ventilation is run at a higher speed or when a window is opened. On the other hand. measurements made in houses of the same type and similar conditions exhibit almost identical results. This is encouraging and indicated that results measured in one house can be generalised to other similar houses. It should therefore be possible for a house producer, for instance on the basis of measurements in a reference house, to draw general conclusions regarding all houses of the same type. Numerous figs and tabs}
place = {Sweden}
year = {1994}
month = {Nov}
}
title = {Tracer gas measurement techniques. Active methods to identify volumes, air flows, flow paths and flow patterns in single family houses; Maetteknik med spaargas. Aktiva metoder foer bestaemning av volymer, luftfloeden, floedesvaegar och stroemningssaett i smaahus}
author = {Hedin, B}
abstractNote = {This thesis Deals with two different models for the description of a flow system and methods for the identification of these models using tracer gas measurements. The methods have been tested in extensive experiments in four single family houses. The idealized multi zone model - which consists of one or more perfectly mixed zones which may be coupled with the flows - has been used to determine air flows and ventilated volumes in single family houses. The most straightforward method of describing a flow system is by its weighting function which expresses the relationship between the injection of tracer gas at one point and the concentration of tracer gas at another points. The main problem in modelling by using the weighting function is that the present method does not include infiltration in the calculations, but regards it as a residual item. Field measurements show that the tracer gas methods used provide valuable knowledge of how the ventilation system in a single family house works. Nor it is possible to acquire this knowledge without tracer gas measurements. However, one essential limitation of the tracer gas method is that it is a tool which described only the present situation. It is difficult to generalize the results to cover that happens when conditions change, e.g. when the house is made more airtight, when ventilation is run at a higher speed or when a window is opened. On the other hand. measurements made in houses of the same type and similar conditions exhibit almost identical results. This is encouraging and indicated that results measured in one house can be generalised to other similar houses. It should therefore be possible for a house producer, for instance on the basis of measurements in a reference house, to draw general conclusions regarding all houses of the same type. Numerous figs and tabs}
place = {Sweden}
year = {1994}
month = {Nov}
}