| 1. |
- Sandberg, Mats, et al.
(författare)
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Experimental methods in ventilation
- 2008
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Ingår i: Advances in building energy research. - London ; Sterling, VA : Earthscan. - 1751-2549 .- 1756-2201. - 9781844073894 ; 2, s. 159-210
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Tidskriftsartikel (refereegranskat)
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| 2. |
- Björling, Mikael, 1960-, et al.
(författare)
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The Indoor Climate of a Naturally Ventilated Church
- 2009
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Ingår i: Healthy Buildings 2009, Sept 13-18, Syracuse, NY USA. - : IAQ. ; , s. 1-4
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Konferensbidrag (refereegranskat)abstract
- The indoor air climate of a church, with a total building volume of 9500 m3, was investigated from January to October, 2008. During this time, infiltration and ventilation measurements were performed at four periods ranging from 17 to 45 days. The local mean age of air was determined in several locations at different heights using passive samplers and homogeneous emission of PFTs. In addition, the temperature and relative humidity was measured at selected locations. The total infiltration of fresh air into the church was found to be mainly driven by the difference between indoor and outdoor temperature. The rate of infiltration ranges from 780 m3/h (deltat=14.8 degrees C) in January to 240 m3/h (deltat=3.5 degrees C) in August. The local mean age of air in the upper and lower air volumes were found to be roughly equal, both during the heating season and in the summer. This indicates that the air volume in the church is well-mixed throughout the year. Transient measurements to assess the effects of doors opening in the summer were also performed using pumped sampling.
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| 3. |
- Björling, Mikael, et al.
(författare)
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Ventilation measurements combined with pollutant concentration measurements discriminates between high emission rates and insufficient ventilation
- 2007
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Ingår i: IAQVEC 2007 Indoor Air Quality Ventilation and Energy Conservation. ; , s. 393-400
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Konferensbidrag (refereegranskat)abstract
- High local concentrations of a pollutant can be the result of high local emission rates of the pollutant or insufficient ventilation. Using tracer gases to map the ventilation in multi-zone buildings combined with measurements of the local pollutant concentration provide the means to discriminate between these causes. In a similar manner, the propagation rate of pollutants from a source to a target zone and the emission rate of the pollutants at the source may be determined quantitatively.The paper presents both the theoretical framework for the techniques and experimental examples of the proposed methods.
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| 4. |
- Boman, CarlAxel, et al.
(författare)
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Monitoring of Air Infiltration in Museums, Case study : The National Museum of Fine Arts, Stockholm, Sweden
- 2004
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Ingår i: The 6th Indoor Air Quality Meeting.
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Konferensbidrag (övrigt vetenskapligt/konstnärligt)abstract
- This paper describes tracer gas measurements at the National Museum of Fine Arts in Stockholm. The building was erected 1850-1860 and the architect was Friedrich August Stüler. He created several museums of Fine Arts, among them Neues Museum in Berlin. The museum building in Stockholm has a volume of almost 90 000 m3 and the number of registered objects of art is well over 600 000. The collection includes one of the world’s most prestigious collections of drawings and graphical prints. In this case study the aim was to determine the infiltration through the main entrance and stairwell, through windows and outside walls. The measurement technique used was the Homogeneous Emission Technique added with a 2-zone set up, by using two different tracer gases. Several interesting results were obtained. One result was that more airtight entrance doors would decrease the infiltration into the main stairwell with 40 %. Another result of interest was that the very dry outdoor air was mixed with the indoor air quickly, and that the mechanical ventilation system with filters and humidifying units has to be upgraded to compensate for the outdoor air infiltration.
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| 5. |
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| 6. |
- Carlsson, Bo, et al.
(författare)
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A method and apparatus for storing heat
- 1980
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Patent (populärvet., debatt m.m.)abstract
- The invention relates to a method and apparatus for storing heat in a heat-of-fusion storage medium, e.g. a salt hydrate, and the heat exchange and mixing in conjunction with the taking of heat from the storage medium. In a closed system including a vapor chamber (5) and a chamber for a solid/liquid phase, the storage medium (2, 4) is brought into direct contact with a substance, i.e., a heat transfer medium (3) having the capacity of taking up heat from the storage medium by being vaporized. The vapor travels to the vapor chamber (5), and when heat is removed from the vapor, the vapor is caused to condense and the condensate returns to the storage medium. The substance has insignificant solubility in the storage medium and a density which is higher, or equal to the density of the storage medium in its liquid phase. Suitable combinations of storage medium and substance include calcium chloride hexahydrate and trifluorotrichloroethane or Clauber's salt and octafluorocyclobutane.
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