The objective of this thesis is the design of an air-water heat pump for heating buildings. The proposed design solution is based on innovative technical concept of a modular system which brings new qualities for the apparatus. One of the major goals of the thesis was to design a versatile system which would replace a wide product range of heat pumps with different heat outputs. The thesis is based on the research part in which an evolution in the field of heat pumps is briefly introduced, followed by the technical and design analysis of present production. The design report contains the description of identified design problems, shows variant design concepts, alternative solutions of parts and details, and finally a detailed description of the definite solution accompanied by a product mock-up in 1:3 scale.

The thesis deals with the reconstruction of the heating system for a family house after complete overcladding. The first part is dedicated to an introduction of the subject under consideration. The next step is the calculation of heat loss.. A suitable method of insulation including economical recovery was designed according to the research of potential insulation materials, then heat loss were re-calculated. Another point is to determine a suitable temperature gradient and select the most appropriate source of heat and hot water preparation. The pressure loss circuit through the various radiators were calculated and balanced by thermostatic radiator valves. Finally, the insurance elements of the heating system were checked and the drawings documentation were prepared.

The thesis is focus on thermal analysis of switchgear. It was executed in Ansys FEM program. Switchgear has to satisfy lot of exams, one of them is thermal exam. It was executed by ABB company and the aim of the work is in possibility that substitution by the numerical method.

The diploma thesis concentrates on a project of condensing steam turbine with uncontrolled extraction. These topics are analyzed in more detail: design of thermal diagram, thermodynamic calculation and turbine design concepts. First two topics are solved in the calculation section of the thesis. In the construction part are processed a third topic.

Thesis in the introductory section describes the theory of heat pumps, the principle of their functions, including components used in pumps. The thesis includes a description of the air-water heat pump indoor unit, which also includes a frequency converter. Electronic frequency converter produces waste heat that must be cooled. The most extensive part of the work therefore deals with the computational model of heat transfer in the exchanger. The output is a map of all heat pump operating points with checking cooling efficiency of the inverter. In the final part are recommended modifications of the cooler design.

This thesis studies a possibility of using hollow fibres for construction of innovative heat exchangers. The first part introduces to the field of heat exchangers and polymers as materials suitable for formation of heat transfer surfaces. Further, the potential of hollow fibres of small diameters is outlined, including the merits, limits and proposals for improving. The significant part of the work is dedicated to the review of methods of fibres fixation and separation and review of fouling and cleaning of heat exchangers. Overviews of design possibilities which prevent fibres clustering have been made. The solutions, which are prepared for experimental research at Heat Transfer and Fluid Flow Laboratory are stated, including analysis of “curly” fibres application. The next part presents calculations for models of water – water and water – air heat exchangers and discusses influence of fibre diameter, flow velocity and the other parameters on heat characteristics. The heat transfer and fluid flow formulas using for heat exchangers of a bigger order can be employed with small changes. Furthermore, the influence of hollow fibres arrangement and distances on heat transfer is discussed.

The aim of this thesis was to determine the impact of the used chemical composure during metallurgical treatment and foundry technology on the inner and surface quality of experimental casting under operational conditions at Třinec foundry. A minor part of this thesis is focused on the determination of the effect of filtration on mechanical properties of steel.

The target of the diploma thesis is balance of energy usage within the property of company Uniman Englis. There is at the beginning description of heat pump for different principles of use. Then there is described geothermal energy and the possibility of gaining energy from mine water found on the company property. This thesis describes the various design options for the use of mine water and revitalization of industrial buildings. These proposals are then designed and assessed in terms of thermal energy by using the heat pump. Afterward there is provided the energy audit for chosen solutions.

This master thesis is focused on surface hardening by using disk laser. Ten samples made of 42CrMo4 steel were hardened at varying speeds of quenching and diameter of the laser beam. The theoretical part initially describes the types of lasers. Further it describes methods of surface hardness processing such as kinds of hardening and chemical-thermal treatment, followed by description of the used material. Images of macrostructure, microstructure and compared values of hardness of single samples are evaluated in the experimental part. The thesis subsequently contains a technical-economic evaluation. Appropriate parameters for surface laser hardening are evaluated in the conclusion.

In this work, there is an overview of the design concept of condensing boilers and types of heat pumps. The current state of heating in company is assessed and possible variants are given for techno-economic evaluation. For boiler room with the gas boiler is prepared a proposal with condensation boiler. For parameters are designed and calculated proposals to form a condensing boiler. The end of the work is focused on the advantages of gas boiler and heat pump.