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19. Evidence based residential ventilation: sizing procedure and system solutions addressed by REHVA Residential Ventilation Task Force

Author

Kurnitski Jarek, Thalfeldt Martin, Weele Harry van, Toksoy Macit, Carlsson Thomas, Vladykova Bednarova Petra, and Seppänen Olli

Subjects
Environmental sciences, GE1-350
Abstract

Wider application of heat recovery ventilation in residential buildings brings attention to knowledge and regulatory gaps which call for research and other actions. In many technical questions there is no consensus in national regulations of EU Member States (MS). This applies for instance for air flow rates, i.e. how much ventilation is needed, restrictions of the use of some heat exchangers types, connection of cooker hoods to ventilation system and placement of exhaust air devices. While European standards are well detailed in these aspects for non-residential ventilation, there is very limited information available for residential ventilation systems. Recent European Guidebook REHVA GB No 25 has made an attempt to collect evidence based best practice technical solutions and design principles for residential ventilation. In this paper a recent evidence and common assumptions behind REHVA airflow rate selection procedure is discussed. Best practice solutions and open research questions related to cooker hood connection to heat recovery and compensation to enable balanced operation of ventilation in an airtight building are analyzed. The paper summarizes existing evidence in these questions and defines open research questions for future residential ventilation research agenda.

Published
2019
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49. Piericidin A Aggravates Tau Pathology in P301S Transgenic Mice

Author

Höllerhage, Matthias, Deck, Roman, De Andrade, Anderson, Respondek, Gesine, Xu, Hong, Rösler, Thomas W., Salama, Mohamed, Carlsson, Thomas, Yamada, Elizabeth S., Gad El Hak, Seham A., Goedert, Michel, Oertel, Wolfgang H., and Höglinger, Günter U.

Subjects
ddc
Published
2013

50. Svävare: Konstruktion av hytt till en svävare

Author

Carlsson, Thomas

Abstract

This report will describe a project between two students from Karlstad University and Markus Norström from Hovercraft solutions. The project aim was to develop a cabin for the hovercraft 380TD. The project was divided into two sub parts; one concerning the design of the cabin and one concerning the engineering. Throughout this rapport you can follow the engineering part of the project. The project has followed a systematic product development process resulting in optimized results for material selection and engineering solutions. Material for the parts of the cabin was selected, by implementation of the Ashby-method. The research gave a hint about possible materials and the Ashby-method confirmed it. A final material selection was then made. A center frame was developed in aluminum, with an integrated hinge and possibilities for mounting different types of equipment. The frame is the core of the construction and works a solid ground for the rest of the cabin. A space-frame was developed out of standard aluminum profiles to stabilize the construction to required stiffness. The space-frame follows the current design and works as an attachment point for the front window as well as the sandwich construction that works as roof and wall for the cabin. After these steps, the selection and placing of a gas damper was made for the moveable parts. A possible solution for the mounting of the windows was developed as well as a solution for the mounting for the frame on the hovercraft. The final weight of the cabin is calculated to 84 kg, very close to the target value of 80 kg.

Published
2012

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