This thesis is devoted to thermal-hydraulic design and rating of heat exchangers with the specialized commercial software HTRI. These heat exchangers are solved for real high-temperature applications, where the hot fluid is a flue gas with high temperature (above 500 °C). In the thesis is made a brief analysis of the conventional design of heat exchangers usable for high-temperature aplications, description of the basic relations, description and brief user manual of software HTRI. Further, work includes a comparative study of methods for calculation of pressure drop of the fluid at 180° elbows, as support analysis for solution of required applications characterized by low pressure drop of process fluids.

(in English): The main goal of diploma thesis is to describe the internet business specifics with focus of identifying the causes of success or failure of companies on the Internet. At the theoretical level in context of thesis is to characterize the influence of the Internet on business principles and give to the reader a complete picture of its impact on current business. Following the main aim of the theses will need a virtually explore the possibilities which offer 21st century in the integration of modern business tools that allows smoother access to corporate infomation and knowledge and If their effective optimatization is the key to a uccessful business on the internet. The contribution of this thesis is to evaluate the practical challenges for companies which brings continual development of information and communication technologies that can be used for support of decision making in selecting an appropriate combination of business tools.

Informetrics study the information flow as a pure information phenomenon. However what are the practical applications of this problem? Information flow can be understood, investigated and managed from different points of view. The most practical one is management approach combined with intuitive analogy. Water flow parallel appears suitable. A conceptual model can be propounded upon this foundation and then used for better illustration of information flow function and key parts. Finally, a good amount of instruments and management methods can be used to manage information flows. So in chosen organization the current state of information flows and contemporary methods of its management are investigated in order to compare the theory and the practice. Concrete suggestions and statements about information flow management are deduced afterwards This paper illustrate possibilities of usage of information flow management in practice. Keywords information flow management - methods of information flow management - information flow model - practical aplications - case study - analogy - induction - Regional research library in Liberec