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Showing result 1 - 5 of 9 essays matching the above criteria.

  1. 1. Reflected Train Noise in Swedish Noise Prediction Methods, a comparison between measurements, Nordic Prediction Method, Nord2000 rail and CNOSSOS

    University essay from KTH/Marcus Wallenberg Laboratoriet MWL

    Author : Ka Hou Karl Ho; [2020]
    Keywords : Nord2000; NMT; Noise prediction method; sound propagation model; source model for railway noise; reflected sound; Nord2000; nordiska beräkningsmodellen för tågbuller; bullerberäkningsmodell; Ljudutbredningen modellen for tåg buller; källsmodell för tåg buller; fasadreflektioner;

    Abstract : The Swedish law requires a set of noise limit for residential buildings for health and safety. Conventionally, the Nordic Prediction Method (NMT) is used to predict the noise. However Nord2000 and CNOSSOS is going to be introduced to replace NMT. READ MORE

  3. 2. The Nordic Prediction Method For Railway Traffic Noise : Improvements of the current corrections forrailway bridges, switches and crossings

    University essay from KTH/Byggnadsmaterial

    Author : KRISTÍN HELGADÓTTIR; RAGNHEIÐUR BJÖRNSDÓTTIR; [2019]
    Keywords : The Nordic Prediction Method; Railway traffic; Railway noise; Noise measurements; Acoustics; Steel bridges; Concrete bridges; Switches; Railway crossings; Correction factor; Correction for track condition;

    Abstract : Railway noise is a very important and growing health hazard in today´s society.Railway systems pass through towns and cities and create noise. When trainsride through or over railway bridges, switches and crossings the noise increasessubstantially, causing great annoyance to the residents in the area. READ MORE

  4. 3. Assessment of a Thermal De-Icing Solution and Control Methods using Simulations

    University essay from KTH/Maskinkonstruktion (Avd.)

    Author : Gustaf Ingvarsson; [2018]
    Keywords : Deicing; control method; LED; simulation; av-isning; kontrollmetoder; LED; simulering;

    Abstract : Lastbilar körandes i nordiska vinterförhållanden riskerar att strålkastare, och andra lyktor blir täckta utav is. Detta hindrar ljuset från att skina på vägen, något som måste åtgärdas manuellt utav föraren. READ MORE

  5. 4. Line Loss Prediction Model Design at Svenska kraftnät : Line Loss Prediction Based on Regression Analysis on Line Loss Rates and Optimisation Modelling on Nordic Exchange Flows

    University essay from KTH/Skolan för elektro- och systemteknik (EES)

    Author : Jakob Sahlin; [2016]
    Keywords : Line Loss Prediction; Linear Regression; Lin-ear Programming; Nordic Exchange Flows; Net-position; Förlustprognoser; Linjär Regression; Linjär Programmering; Nordiska Transmissionsflöden; Netto-positioner;

    Abstract : Forecast and estimation on transmission line losses is a vital task in the daily operation and planning of the Swedish power system. The aim with this thesis is to design a new line loss prediction model at Svenska kraftnät (Svk), which provides a hourly forecast of the transmission line losses the next day for the Swedish bidding areas (SE1-SE4). READ MORE

  6. 5. Forecasting Model of Electricity Demand in the Nordic Countries

    University essay from Lunds universitet/Matematisk statistik

    Author : Tone Pedersen; [2014]
    Keywords : Mathematics and Statistics;

    Abstract : A model implemented in order to describe the electricity demand on hourly basis for the Nordic countries. The objective of this project is to use the demand data simulated from the model as input data in the price forecast model, EMPS model, at Vattenfall. The time horizon is 5 years, 6 years including the current year. READ MORE