Sökning: "stretched grid"

Hittade 5 uppsatser innehållade orden stretched grid.

  1. 1. Simulating flow-noise for after-treatment systems

    Master-uppsats, KTH/Teknisk mekanik

    Författare :Adam Sandström; [2020]
    Nyckelord :Flow-noise; CAA; DES; non-refelctive boundary conditions; stretched grid; Menter SST;

    Sammanfattning : Modern silencers for heavy vehicle applications are designed to cancel out the sound generated by the effects of combustion and propagation of exhaust gases through the engine after-treatment system. The complex geometry within the compact silencer give rise to self generated (or flow-) noise that contribute to the total sound power radiated at the exhaust outlet. LÄS MER

  3. 2. Grid impact study of frequency regulation with EVs

    Uppsats för yrkesexamina på avancerad nivå, Lunds universitet/Industriell elektroteknik och automation

    Författare :Emma Blomgren; [2018]
    Nyckelord :Electric vehicles EVs ; grid impact; ancillary services; frequency regulation; FCR-N; vehicle-to-grid V2G ; voltage; reactive power; load profile; Technology and Engineering;

    Sammanfattning : The ongoing grid paradigm shift has resulted in synchronous generators currently being phased out. As the generators have been providing ancillary services, such as frequency control regulation, this means that new technologies to perform ancillary services need to be developed and evaluated. LÄS MER

  4. 3. Porphyrins based detection of NH3 and CO, using field effect grid gate devices

    Master-uppsats, Tillämpad Fysik

    Författare :Rafael Sánchez Reátegui; [2010]
    Nyckelord :;

    Sammanfattning : Porphyrins consist of twenty-atom rings containing four nitrogen atoms and can be used as sensor to detect odours and gases. This thesis investigates whether or not porphyrins can be used as functional materials on grid gate devices. LÄS MER

  5. 4. Porphyrins based detection of NH3 and CO, using field effect grid gate devices

    Master-uppsats, Institutionen för fysik, kemi och biologi

    Författare :Rafael Sánchez Reátegui; [2010]
    Nyckelord :Porphyrins; Grid Gate; Metal Oxide Semicondutctor; Scanning Light Pulse Technique; Response Map.;

    Sammanfattning : Porphyrins consist of twenty-atom rings containing four nitrogen atoms and can be used as sensor to detect odours and gases. This thesis investigates whether or not porphyrins can be used as functional materials on grid gate devices. LÄS MER

  7. 5. Funktion och upplevelse : faktorer för en god boendemiljö applicerade på en plats i Tierp

    L3-uppsats, SLU/Dept. of Landscape Architecture, Planning and Management (from 130101)

    Författare :Christian Wintenby; [2005]
    Nyckelord :bostadsområde; Tierp; trädgårdsstad; planering;

    Sammanfattning : This thesis is a study of residential environments and a design concept for a proposed housing area in Tierp. The industrial era created a need for the central planning of housing. The confined environments that arised in cities during the 19th century, together with modernistic and democratic ideas, led to regulations in planning and housing. LÄS MER