202 uppsatser · sida 8 av 14
… of the liquid to evaporate. The generated steam is lead into a turbine where electricity is in a conventional manner. The purpose with this rapport was to do a basic study for the specific system at Arvika where it’s possible to see the potential production of electricity that …
Undervisningshuset och Biblioteket i Uppsala
… and lighting. The need of purchased energy can also be reduced by producing electricity or heat on site, using solar energy. Results show that economically viable measures include upgrading windows and faucets, adjusting control systems for ventilation and lighting, and …
… is cooled by applying external heat. This technique involves a reduction in electricity consumption compared to electrically-powered cooling machines and does not affect the district cooling system usage. It was therefore of interest to investigate if sorptive cooling would be …
The society of today is dependent of secure transports and deliveries of electrical power. Interruptions in different activities because of fallen trees cost a great deal of money in form of reparations and claimed damages for transport companies and electrical suppliers. Fallen …
This thesis work contains a litterature study about electrical motors in general and how PWM-patterns for brushless DC-motors can be made. A suitable method has been implemented as a simulation model in VHDL. A simulation model of a brushless DC-motor which describes the …
… of HPW Fresh & Dry Ltd., a fruit drying factory in Ghana. The factory produces electricity with diesel and biogas but also purchases electricity from the national electricity company. Heat for the drying process is produced from biogas, kerosene and solar panels. In the project …
… strategy and how the local distributions net could be more secure. The electrical net could be secure but no system can be free from interruption. The dissertation examines two distribution transformers: GLA40T1 (Glansås) and T399 in Tranås Energy which don’t have regulators. It …
… on nuclear power plants. - Education and training in suppressing fires in electrical equipment. The probabilistic safety assessment strives to be as realistic as possible. Consequently this study recommends not giving credit for the manual fire fighting in some of the rooms …
Metoder för att sänka återledningstemperaturen
… this also demands that the time of instalments is set to 25years, and that electrical power can be used at the cost of 0,30kr/kWh. Calculations also shows that it could be quite profitable, If wood chips instead were to be made, with use of the Bio-mass dryer. In a such case the …
… and Politecnico di Torino (2) have shown that it is possible to build an all-electric aircraft powered by fuel cells. Both flights used small, two-seater aircraft and a constant between them was the loss of the co-pilot seat due to weight and lack of space. As this paper will …
One step towards a more sustainable energy system is to create a more flexible electrical grid, where increased demand response among electricity consumers can play an important role. A distribution grid owner can encourage their customers to use electricity more evenly …
… system. This thesis is a study on a two-level low voltage (1 kV and 0.4 kV) electrical system with the aim to investigate if it can be an alternative to the system used today taking into account the voltages, fault currents and costs. In this thesis the following tasks have been …
en teknisk och ekonomisk utredning
… Rya Kraftvärmeverk with a pellet production facility. By producing heat, electricity and pellet in a joint process the energy use can be decreased. The production can also be more cost efficient due to a lower investment cost when using the same boiler etc, for different …
… larger projects. This main project involves the development of an electric powered formula racing car. The part of this car that involved EBH was the battery handling to guarantee safe and quick battery exchanges during pit-stops. The solution became an entire battery module …
teknik och investeringsutrymme
… and used to draw conclusionsabout the costs for production of heat and electricity with different conversion technologies.The model uses climate data to simulate the variations in heat energy demand on a day-to-day basis.The given heat demand is the base of the simulation and …
