Search for dissertations about: "Sound energy into Electrical energy"

Showing result 1 - 5 of 8 swedish dissertations containing the words Sound energy into Electrical energy.

  2. 1. Underwater radiated noise from Point Absorbing Wave Energy Converters : Noise Characteristics and Possible Environmental Effects

    Author : Kalle Haikonen; Jan Sundberg; Sigray Peter; Uppsala universitet; []
    Keywords : Wave energy conversion; renewable energy; environmental impact; marine ecology; underwater noise;

    Abstract : The conversion of wave energy into electrical energy has the potential to become a clean and sustainable form of renewable energy conversion. However, like all forms of energy conversion it will inevitably have an impact on the marine environment, although not in the form of emissions of hazardous substances (gases, oils or chemicals associated with anticorrosion). READ MORE

  4. 2. Characterization of energy gases by ultrasound : theory and experiments

    Author : Pär-Erik Martinsson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Signalbehandling; Signal Processing;

    Abstract : The long-term goal with the research presented in this thesis has been to develop an ultrasonic sensor capable of measuring the energy content of energy gases such as natural- and biogas. The energy content can be calculated if the concentration of each constituent of a gas mixture is known. READ MORE

  5. 3. Improved performance characteristics of induction machines with non-skewed symmetrical rotor slots

    Author : Rathna Chitroju; Chandur Sadarangani; Kelvin C Maliti; KTH; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; skewing; cross current losses; radial magnetic forces; magnetic noise; asymmetrical rotor slots; eccentricity; stator vibration; two-dimensional fast fourier transform; finite element method; Electrical engineering; electronics and photonics; Elektroteknik; elektronik och fotonik;

    Abstract : Induction machines convert more than 55% of electrical energy into various other forms in industrial and domestic environments. Improved performance, especially by reduction of losses in induction machines hence can significantly reduce consumption of electricity. READ MORE

  6. 4. Analytical photoacoustic model of laser-induced ultrasound in a planar layered structure

    Author : Erika Svanström; Erik Olsson; Luleå tekniska universitet; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY; Industriell elektronik; Industrial Electronics;

    Abstract : A way of describing photoacoustic measurement techniques is listening to light. Another way is as sensor techniques for characterisation of materials by means of light and sound interacting with the material under investigation. READ MORE

  7. 5. Analysis of the vascular sounds of the arteriovenous fistula

    Author : Marco Munguia Mena; Institutionen för elektro- och informationsteknik; []
    Keywords : TEKNIK OCH TEKNOLOGIER; ENGINEERING AND TECHNOLOGY;

    Abstract : This licentiate thesis is in the field of biomedical signal processing with main focus on processing of the vascular sounds of the hemodialysis vascular access in patient undergoing hemodialysis. The first paper proposes a feature extraction method based on principal component analysis (PCA) for acoustic detection of venous stenosis. READ MORE