Sökning: "air exchange efficiency"

Visar resultat 21 - 25 av 36 uppsatser innehållade orden air exchange efficiency.

1. 21. Analys av metanflöden från sjön Erken

   Master-uppsats, Uppsala universitet/Luft-, vatten- och landskapslära

   Författare :Ryan Mintz; [2016]
   Nyckelord :methane; transfer velocity; flux; waterside concentration; eddy covariance; Nyckelord: metan; utbyteskoefficient; flux; metankoncentration; eddy kovarians;

   Sammanfattning : While it is not the most abundant greenhouse gas, a significant portion of the greenhouse effect is caused by methane. The amount of methane in the atmosphere is increasing, indicating that there is a continuous source of methane to the atmosphere. LÄS MER

3. 22. Ventilation efficiency measurements - a comparison between three supply air methods

   Master-uppsats, Lunds universitet/Avdelningen för Energi och byggnadsdesign

   Författare :Max Henriksson; Henrik Nilsson; [2016]
   Nyckelord :Ventilation efficiency; air exchange efficiency; local ventilation index; mean age of air; comparison; mixed ventilation; displacement ventilation; Technology and Engineering;

   Sammanfattning : This study compares the two traditional ventilation methods ; mixed ventilation and displacement ventilation, with a new type of dif fuser which attempts to solve the problem with blockage of the diffuser for the displacement ventilation. This new diffuser called Airshower is a product developed by Airson engineering AB whom is also the company where all simulations and tests for this study were performed in a built office space. LÄS MER

4. 23. Jämförelse mellan vattenburet och luftburet kylsystem i kontorslokaler : Med hänsyn till energibehov och komfort

   Uppsats för yrkesexamina på grundnivå, Karlstads universitet/Institutionen för ingenjörs- och kemivetenskaper

   Författare :Anton Henning; [2016]
   Nyckelord :Kyla; Vattenburen; Luftburen; Simuleringar;

   Sammanfattning : The work has been carried out in cooperation with Swegon AB, the market leader for ventilation and indoor climate business. For work have their own programs ESBO be used to simulate and on the way to compare different systems.   The annual energy use in the world is constantly increasing. LÄS MER

5. 24. Removal efficiency of perfluoroalkyl substances (PFASs) in drinking water : evaluation of granular activated carbon (GAC) and anion exchange (AE) using column tests, and the effect of dissolved organic carbon

   Master-uppsats, SLU/Dept. of Aquatic Sciences and Assessment

   Författare :Anna Östlund; [2015]
   Nyckelord :PFASs; perfluoroalkyl substances; removal efficiency; granular activated carbon; GAC; anion exchange; AE; dissolved organic carbon; DOC;

   Sammanfattning : Poly- and perfluoroalkyl substances (PFASs) are a group of environmental contaminants that have gained increasing attention due to their potential to bioaccumulate, environmental persistence and potential toxicity. PFASs have been found in surface water, sediment, air, soil, sludge and ice caps globally, as well as in wildlife and humans. LÄS MER

7. 25. Evaluation of the efficiency of treatment techniques in removing perfluoroalkyl substances from water

   Uppsats för yrkesexamina på avancerad nivå, Uppsala universitet/Institutionen för geovetenskaper

   Författare :Sandra Lundgren; [2014]
   Nyckelord :PFAS; removal efficiency; MIEX®; iron III chloride; Powdered activated carbon; nanofiltration membrane; dissolved organic carbon;

   Sammanfattning : Perfluoroalkylated substances (PFASs) are a group of synthetic compounds that have gained growing attention due to their environmental persistence, toxicity and their potential to bioaccumulate. Even though PFASs are not occurring naturally in our environment, they are globally distributed and can be found ubiquitously in air, water, soil, wildlife as well as in humans. LÄS MER