The thesis deals with the refrigeration systems. It analyzes ways to optimize the refrigeration process and the associated energy savings. In a practical application on an industrial building where there is the need of cooling the machinery, it compares the reference system with another two optimized alternatives. The heat recovery alternative supports heating and hot water supply and the water-side free cooling alternative lowers the energy consumption during the cold period of the year. The experimental section assesses the suitability of floor cooling in relation to the stratification of air temperature along the height of the room and the effect on thermal comfort of people.

(in English): The aim of this thesis is to introduce the theme of the Canary emigration to Cuba in the second half of the nineteenth and early twentieth century. For better orientation, the author has chosen time interface between the years 1860-1914. The introduction outlines the sources and secondary literature, from which the author draws and also supposed goal of work. The second chapter is devoted to the Canarian emigration from Columbus's expeditions to the first half of the nineteenth century and its gradual development. The third chapter describes the specific reasons that led to the emigration from the Canary Islands, the attention is focused on the travel conditions of immigrants, employment contracts and promotion. The fourth chapter has been devoted specifically Canarian immigrants and their impact on Cuba, including labor stratification. The fifth chapter focuses on emigration to the turn of the century, there is a special attention is paid to the topic canary societies and associations. The conclusion summarizes the achieved knowledges and changes of this emigration.