This master thesis investigated how a hydrogen energy storage could be used anddimensioned to reduce the problem of power shortage in the local distributiongrid in Uppsala, Sweden. By implementing such a storage system in mobilityhouses, which are parking garages with integrated charging stations for electric vehicles and smart renewable energy solutions for power generation, the problem with power shortage could be decreased. The results showed that by integrating a hydrogen storage together with battery packs, it was possible to reduce power peaks in mobility houses. Further, it was clear that more power peaks facilitated the dimensioning of these type of systems. It was also shown that due to today's initial cost of hydrogen storages, the total savings related to a limited purchase of electricity from the grid were insignificant. It was therefore found that this type of hydrogen storage would not reduce costs in the short term for the mobility houses considered in this study. However, implementing a smaller kW storage could generate and improve knowledge in the hydrogen/hybrid field, which could facilitate the implementation of larger systems in the future. Furthermore, the results showed that it could be interesting to implement hydrogen storages on a bigger scale for municipalities or actors, who would want to reduce the power shortage in the local distribution grid.

The inadequacy of water and power supplies in Utah for agriculture, for industry, for domestic and community consumption has retarded the State's economic growth. Shortages of water and hyroelectric power are the principle impediments to the full realization of other potentials of Utah, that is, the full use of its arable lands, the wide and diversified use of its industrial raw materials, and the unrestricted development of its communities. The problem of securing additional sources of water and power has resolved itself into one of major concern. The objective of this study was to determine unit values of consuptive use of water by the major crops (alfalfa, small grains, and pasture) in the Ashley and Ferron Creek Areas of Utah. The consumptive use by the individual field crops was based on measurements of the depletion of moisture in the soil. Evapo-transpiration tank experiments were conducted in Ashley Valley throught the growing season and the volumes of water consumed were measured directly. Yield data were obtained from field samples and comparisons between yield and consumptive use were observed.

Målet med denna studie var att studera olika aspekter av den prioritetsordning som används för att prioritera elanvändare i svenska elnät i händelse av nationell-, regional eller lokal elbrist. Studien redogör för hur prioriteringar av olika elanvändare går till och hur nyttan av olika elnät förändras utifrån en beslutsfattares egna preferenser, vidare redovisas hur samverkan mellan olika elnät påverkar den totala nyttan som varje invånare i ett samhäller erbjuds. Objekten i ett samhälle som förekommer på ett elnät delas in i åtta prioriteringsklasser beroende av objektets funktion. Området för denna studie har varit beslutsanalys. Studien har genomförts med hjälp av resultat från tidigare studier och teorier kring beslutsanalys, med detta som grund har en simulering genomförts för att påvisa hur nyttan av ett elnät ändras då förutsättningarna ändras. Förutsättningarna har varit; total kapacitet av elektricitet till samhället, avstånd mellan samhällen och de olika objektens efterfrågan av elektricitet. Studiens resultat har påvisat att ellinjer med objekt av hög prioriteringsklass ska prioriteras före ellinjer med objekt av låg prioriteringsklass. Vidare har studien visat att det kan finnas elnät i ett samhälle vars nytta skulle kunna vara större än de elnät som förespråkas av prioritetsordningen, och att dessa kan vara disjunkta. Detta för att prioriteringsordningen ska prioritera det elnät med högprioriterade objekt, inte nödvändigtvis det elnät med störst nytta. Studie har därmed resulterat i att elnät bör prioriteras efter dess nytta och att en beslutsfattare bör vara medveten om elbristens storlek, avstånd mellan samhällen och varje objekts efterfrågan av kapacitet för att kunna fatta ett bra beslut. Gällande samverkan mellan elnät visade studien på att detta kan genomföras om avståndet mellan samhällena inte var för stort. / The aim of this study was to study the Styrel concept as an approach to identify electricity users and prioritize them in the event of a power shortage on a power grid. The study has examined and investigated how the priorities of different electricity users go to, how the benefits of manual disconnection change according to the decision makers' different priorities and how interaction between different local networks affects total utility. The features of a community on a local area, also called objects, are divided into eight priority classes depending on the function of the objects. The area for this study has been decision management. The study has been conducted using results from previous studies and theories on decision analysis as the basis for constructing a simulator that simulates how the power of a power failure changes for a local area dependent on the extent of the electricity supply (capacity). The study's findings have shown that prioritization of electricity supply line with higher priority classes should be prioritized than an electricity supply line with lower priority classes. This is also the result of previous studies. On the other hand, the study has shown that the fixed asset for an electricity supply line with lower priority objects is higher than an electricity supply line with higher priority objects, but with less benefit, priority should be given to the electricity supply line of higher priority objects. This study has thus resulted in the fact that electricity supply lines should be prioritized after the benefit if a decision maker is aware of the extent of the deficiency. Current collaboration between local networks showed that this could be dependent on the factors: distance, risk profile of decision makers and change of benefit through collaboration.