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Showing result 1 - 5 of 29 essays matching the above criteria.

  1. 1. Reprocessing and Characterization of Polybenzimidazole for High-Temperature Polymer Electrolyte Membrane Fuel Cells

    University essay from Lunds universitet/Centrum för analys och syntes

    Author : Douglas Björkengren; [2023]
    Keywords : polymer electrolyte membrane fuel cells; PEMFC; HTPEMFC; polymer technology; polymer characterization; reprocessing; recycling; polybenzimidazole; PBI; Technology and Engineering;

    Abstract : A reprocessing method of poly(2,2’-(m-phenylene)-5,5’-bibenzimidazole) (PBI) membranes recovered from the production line of High-Temperature Polymer Electrolyte Membrane Fuel Cells (HT-PEMFC) at Blue World Technologies (BWT) has been developed in order to reduce material loss in the production. Redissolution of scrap PBI membranes in poly(phosphoric acid) (PPA) and phosphoric acid (PA) was successful and the subsequent washing procedure produced PBI that could be redissolved in N,N-dimethyl acetamide (DMAc) and suitable for solution casting of new membranes. READ MORE

  3. 2. Development of a computational method for determining gamma energy escape from calorimeters at CLAB

    University essay from Uppsala universitet/Tillämpad kärnfysik

    Author : Amela Mehic; [2022]
    Keywords : Nuclear physics; Calorimeter; SNF; MCNP; Dose rate; CLAB; Gamma energy; Fuel assembly; Form function; Attenuation coefficient; Gamma spectroscopy;

    Abstract : Swedish Nuclear Fuel and Waste Management Company- SKB has conducted measurement campaigns at the Swedish central interim storage facility for spent nuclear fuel- CLAB over the years, extending from year 2003 to 2019 where the gamma energy escape was acquired. At CLAB the spent nuclear fuel assembly is inserted into the calorimeter; device intended to measure temperature increase due to decay heat from the fuel assembly. READ MORE

  4. 3. An Investigation of Methods for Flow Measurements in a Gasketed Plate Heat Exchanger for Predictive Maintenance

    University essay from Lunds universitet/Avdelningen för Biomedicinsk teknik

    Author : Viktor Ekström; [2022]
    Keywords : gasketed plate heat exchanger; electrical measurements; sensors; predictive maintenance; machine learning; Technology and Engineering;

    Abstract : For a company to stay relevant in the long term, it is essential to keep up with the latest technology and continuously consider new innovative solutions for improving products and services. The gasketed plate heat exchanger (GPHE) is a mechanical device, and this work attempts to investigate different possibilities for incorporating sensor devices and predictive maintenance systems to improve the device. READ MORE

  5. 4. Termochip för hästar : jämförelse med rektal temperatur och beteende vid mätning

    University essay from SLU/Dept. of Clinical Sciences

    Author : My Monto Zale; [2022]
    Keywords : beteende; chip; häst; häst-; microchip; sensor; temperatur; termochip;

    Abstract : Temperaturmätning är vanligt förekommande inom djursjukvård för att ge en indikation på djurets hälsostatus. Vanligt är att temperaturen mäts rektalt men detta accepteras inte av alla patienter. READ MORE

  6. 5. Fully Digital Process Variation Sensor for High Performance System-on-a-Chip

    University essay from Linköpings universitet/Elektroniska Kretsar och System; Linköpings universitet/Tekniska fakulteten

    Author : Viktor Lidholm; [2022]
    Keywords : Integrated Circuits; Process Sensor; Electronics;

    Abstract : Integrated Circuit (IC) designers have always faced the problem of small deviations in parameters of their designs in manufactured ICs. This variation due to the manufacturing process (Process Variation) in device parameters from their nominal values result in altered performance and can cause integrated circuits to be malfunctioning. READ MORE