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Cooperation of heat pump with passive solar system
Bohůn, Vojtěch ; Králová, Zuzana (referee) ; Mastný, Petr (advisor)
This bachelor thesis deals with alternative energy sources – a solar system and a heat pump. Their operation is energy-advantageous and they can be efficiently connected in one system. The focus of this thesis is firstly to give an overview of kinds, function, properties, constructional elements and usual arrangements of active and passive solar systems and heat pumps in connection with heating of buildings, secondly to suggest a connection of a combined heating system with a heat pump and of a passive solar system and to evaluate it from an energetic and economic point of view. Firstly, a basic theory for calculation of quantity of electrical energy absorbed by a surface is introduced. Then, a categorization and construction of active and passive systems are presented. Hereafter, advantages and disadvantages of single solar systems are described and basic calculation relations for determination of a heat gain and of proportions of passive solar systems are showed. Subsequently, the function of a heat pump is analyzed, the categorization of its kinds according to the relevant criteria is given and its basic functional elements, typical properties and means of possible use are described. On the basis of gained knowledge, conditions of cooperation of a heat pump with a passive solar system are summarized and substantiated. According to these conditions and to the construction of an object, a combined system is designed for, a connection of a system with a heat pump air / water, a heat accumulator and a recuperative unit is constructed. Consequential calculations evaluate energetic needs of an object and heat gains of a passive solar system. They serve as a basis for a concept of heat source and for determination of an energy balance. A total annual heat need is 13914,7 kWh. It was compared with the case when the object was equipped with standard-size windows. The comparison shows that a passive solar system can spare roughly one third of total annual heat consumption. From the measurement on the object is determined, when a passive solar system is able to supply a heat pump with heat. After that, the suggested system is evaluated from an economic point of view: it is compared with other possible heat sources by the method of net present value. It can be said that solid fuel firing and gas firing are economically more advantageous than the use of a heat pump. The reasons are particularly high initial costs and in case of wood firing also its low price. In conclusion, the gained results are summarized.
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Project of Autonomous Heating Source
Pejcl, Jiří ; Ptáček, Michal (referee) ; Radil, Lukáš (advisor)
The diploma thesis deals with design of a suitable heat source for heating and hot water. There are dealt with operational costs of different types of heat sources, which are compared with one another. The next part is the implementation of specific proposal of the heat source - heat pump ground/water with deep wells and measuring system. The last part describes measuring several operating modes of the heat pump.
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Honeywell Heat Pump Controller Automated Test
Ruhás, Sándor ; Macho, Tomáš (referee) ; Fiedler, Petr (advisor)
This work deals with the design and realization of an automated test software for the Honeywell superheat controller. The first part of the project includes brief description about embedded systems and heat pumps. Afterwards testing principles are covered in a short chapter, followed by a description of the Honeywell superheat controller. After these chapters actual software structure will be introduced to the reader- with a detailed description of the most interesting parts. At the end of the document there will be a summary what was achieved exactly, and what was the plan. After this summary, the reader can study almost all the Virtual Instruments created during the development of this project.
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Modern energy and decreasing the energy intensiveness of buildings
Kučera, Miroslav ; Popelka, Josef (referee) ; Havlík, Roman (advisor)
This diploma thesis deals with possible energy-savings in the municipal buildings of Spytihněv. Moreover, it discusses the possible improvements of heating features and making use of renewable resources. This is meant to be achieved by a wrapper which is less demanding on energy consumption than those which have been used until now. Attention is also paid to a more efficient system of energy distribution. Both energetic and financial points of view are taken into consideration. The thesis consists of a few parts. Introduction, the first part, deals with renewable resources issues on a theoretical level. The second part is divided according to each individual analysed premise/building. At this point energy-saving proposal, choice of a heating system, a heating pump, a solar collector as well as energy-saving and financial calculation are included.
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Power harvesting sensors
Arnošt, Karel ; Klusáček, Stanislav (referee) ; Beneš, Petr (advisor)
The thesis deals with power harvesting sensors as a source of energy. As the power requirements for microelectronics decreases the environmental energy sources become more perspective. In a few last years batteries reach a higher capacity but there is still problem with their replacement. Power harvesting sensors appears as a good solution for powering microelectronics.
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Optimalize Application of Cascade Convection of a Heat Pumps
Hrnčíř, Zdeněk ; Šenk, Josef (referee) ; Gregor, Jan (advisor)
The introductory part of this diploma work contains a basic thought for the application of the heat pumps cascade connection and further I describe its function and define the notion of an optimum middle temperature.Then the direct comparison of two heats pumps cascade connection with an one-stage heat pump is shown there in a concrete example. The main part of the work is aimed to the determination of the most suitable variant for the heating and for the preparation of a hot service water in a benchmark family house. The systems of heatings are provided in options of a low-temperature floor heating and hot-water radiators. Both types of the heat pumps supply the warm to every heating system. It results into four possibles alternatives of the building heating.Besides of the alternatives mentioned above, a new variant of optimalised cascade connection was arisen during this work elaboration . The first stage of this connection which supplies the warm to the floor heating is disconnected out of the heating season and the second stage provides only a hot service water warming. The results of this work showed us that just this variant of a cascade connection causes savings in energy in comparison with an one-stage heat pump. In the conclusion of this work there are discussed the reached results and indicated the possibilities of a practical exploitation.
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Heating motherly school with heat pump and solar collectors with additional heating to the open air pool
Preclík, Vítězslav ; Krhovský, Bohumil (referee) ; Mastný, Petr (advisor)
In 2007, in June the company Europrojekt entered the project with the requirement of the formulation and implementation of heating motherly school by heat pumps in the village Hluk. The projekt was ordered by the management of this motherly school. This is a total reconstruction of the heating system building motherly school, including the use of residual heat for heating the pool water in an open swimming pool, which is located near this motherly school. The requirement is also given to reduce environmental pollution and achieve energy savings. This diploma thesis solves the detailed description of solutions and calculations for each part. In first, the introductory part of the work is focused on getting the project, a description of the object motherly school and a proposal for the energy measure before the realization. Second section is devoted to the selection and design of the system of heat pumps and solar collectors. Next part of work is the use of the residual heat for heating the pool water in the transitional months, i.e. May, September and the main months June, July, and August, when should be the visit of the swimming pool the biggest. In addition, resolving heat recovery through plate exchangers, the calculation of storage tanks, valves insurance proposal, the expansion tank, circulation pumps, etc. The last part thesis addresses the energy and economic assessment of the whole project.
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The long-term accumulation of solar collectors and the subsequent use of the heat
Litera, Jiří ; Fiedler, Jan (referee) ; Kracík, Petr (advisor)
The aim of the thesis is the design and evaluation of the long-term accumulation of solar collectors and the subsequent use of the heat. The basic principles of the use of solar energy are introduced in the theoretical part as well as the list of available heat pumps, solar collectors moreover options for the accumulation of heat are evaluated. In the practical part the system of a long-term heat accumulation for a partially restored family house is designed, where accumulation into water or gravel are the two presented options. Solar energy is collected by solar collectors and accumulated in the long term storage. The system involves water to water or ground to water heat pump that reduces the temperature of the reservoir in order to increase the temperature difference of the system. Both options require a large volume of heat collecting, including large surface of solar collectors. Because of the high cost and spatial requirements the system shows to be hardly realistic in practice. For this reason an alternative solution of a family house heating system more suitable from the economic point of view is described. As a result it was proved that system of the long-term accumulation is not an appropriate solution for heating system of family houses and it is used in places with enough space for the accumulation such as high capacity trays or flooded mines. For existing family houses (partly insulated and with a heat source such as natural gas) the usage of the heat pump eventually supported by solar collectors appears as the most sensible solution. Such solution shows a return of investment from 14 to 25 years, and contributes to sustainable development and to reduction of non-renewable primary energy.
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Alternative Energy Resources for Family House
Buráň, Petr ; Štelcl, Otakar (referee) ; Špiláček, Michal (advisor)
In this bachelor thesis we will focus on alternative energy resources for family house. The thesis consists of two main chapters. The first chapter is focused on research, in which we will sequentially introduce different resource of energy and describe their principle of operation. In the second chapter we will create proposal designs for different energy resources for family house and their price comparisons.
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