Search for dissertations about: "active ventilation"

Showing result 1 - 5 of 38 swedish dissertations containing the words active ventilation.

  2. 1. Active Noise Control in Ventilation Systems : Practical Implementation Aspects

    Author : Martin Larsson; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : In many kinds of buildings, the ventilation is handled by a mechanical ventilation system. Such ventilation systems constitute a well known source of broadband noise. READ MORE

  4. 2. Evaluation of new active technology for low-energy houses

    Author : Henrik Davidsson; Avdelningen för Energi och byggnadsdesign; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Low-quality heat; hybrid ventilation; heat recovery; active house; solar window; PV T hybrid; building integration; TRNSYS;

    Abstract : Using energy at low-quality levels opens up new possibilities for low-energy houses. Low-quality energy can be heat at a temperature that is close to that of its surrounding, and can be used, for example, to pre-heat ventilation air or domestic hot water. READ MORE

  5. 3. Active Control of Noise in Ventilation Systems : Analysis and Experiments

    Author : Martin Larsson; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : In many kinds of buildings, the ventilation system constitute a well known source of broadband noise. Traditionally, duct born noise is attenuated using passive resistive silencers which produce a high level of attenuation over a broad frequency range. However, they tend to become large and bulky if designed for low frequency attenuation. READ MORE

  6. 4. Adapting Variable Air Volume (VAV) Systems for Office Buildings without Active Control Dampers

    Author : Mari-Liis Maripuu; Chalmers tekniska högskola; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; climate control; CAV; variable supply air diffuser; ventilation; VAV; energy efficiency;

    Abstract : In commercial buildings the building services systems may account for a substantial part of the need of energy. There is, at least in Sweden, a large existing stock of 20 to 30 year old office buildings, which are supplied with centralised constant air volume flow (CAV) air conditioning systems with the primary function to keep the room temperature at an acceptable level summertime. READ MORE

  7. 5. Design of Hospital Operating Room Ventilation using Computational Fluid Dynamics

    Author : Sasan Sadrizadeh; Sture Holmberg; Christian Poelma; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; HUMANIORA; HUMANITIES; Computational Fluid Dynamics CFD ; Ventilation System; Hospital Operating Room; Bacteria Carrying Particle; Surgical Site Infection; Colony Forming Unit; Airborne Particle Control; Air Quality; Thermal Comfort; Active-Passive Air Sampling methods; Computational Fluid Dynamics CFD ; ventilationssystem; operationssal på sjukhus; bakteriebärande partikel; infektion i samband med operation; kolonibildande enhet; kontroll av luftburna partiklar; luftkvalitet; termisk komfort; aktiva-passiva provtagningsmetoder för luft; Engineering Mechanics; Teknisk mekanik;

    Abstract : The history of surgery is nearly as old as the human race. Control of wound infection has always been an essential part of any surgical procedure, and is still an important challenge in hospital operating rooms today. For patients undergoing surgery there is always a risk that they will develop some kind of postoperative complication. READ MORE