Essays about: "air exchange efficiency"

Showing result 16 - 20 of 21 essays containing the words air exchange efficiency.

  1. 16. Ventilation efficiency measurements - a comparison between three supply air methods

    University essay from Lunds universitet/Avdelningen för Energi och byggnadsdesign

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

    Abstract : 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. READ MORE

  3. 17. 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

    University essay from SLU/Dept. of Aquatic Sciences and Assessment

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

    Abstract : 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. READ MORE

  4. 18. Evaluation of the efficiency of treatment techniques in removing perfluoroalkyl substances from water

    University essay from Uppsala universitet/Institutionen för geovetenskaper

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

    Abstract : 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. READ MORE

  5. 19. Numerical Study on the Thermal Performance of a Novel Impinging Type Solar Receiver for Solar Dish-Brayton System

    University essay from KTH/Kraft- och värmeteknologi

    Author : Haoxin Xu; [2013]
    Keywords : Solar receiver; Jet impingement; Conjugate heat transfer; Computational fluid dynamics;

    Abstract : An impinging type solar receiver has been designed for potential applications in a future Brayton Solar Dish System. The EuroDish system is employed as the collector, and an externally fired micro gas turbine (EFMGT) has been chosen as the power conversion unit. READ MORE

  6. 20. Measurement of the thermal performance of a Borehole Heat Exchanger while injecting air bubbles in the groundwater

    University essay from KTH/Tillämpad termodynamik och kylteknik

    Author : Eduard Calzada; [2012]
    Keywords : ;

    Abstract : The most common way to exchange heat with the ground in Ground Source Heat Pump (GSHP) applications is with borehole heat exchangers (energy col-lectors in vertical wells). These boreholes contain the pipe with the secondary fluid of the GSHP and they are often filled with natural groundwater. READ MORE