The thesis describes a design of the office building of Wanemi a.s. company in Zábřeh na Moravě. The company intends to build an ecological paper mill in the city. The office building is located at the „green“ entrance zone of the manufacturing facility. The building is designed in accordance with the requirements of energy–efficient buildings and the philosophy of the company – People and nature. The „green“ entrance zone that includes a placement of individual objects (office building, presentation pavilion, info center) has been solved as a pre-diploma thesis.

Cellular Internet of Things (CIoT) has emerged as a promising technology to support applications that generate infrequent data. One requirement on these applications, often battery-powered devices, is low energy consumption to enable extended battery life. Narrowband IoT (NB-IoT) is a promising technology for IoT due to its low power consumption, which is essential for devices that need to run on battery power for extended periods. However, the current battery life of NB-IoT devices is only a few years, which is insufficient for many applications. This thesis investigates the impact of energy-saving mechanisms standardized by 3GPP on battery life of NB-IoT devices. The main research objective is to classify and analyze existing energy-saving solutions for CIoT and examine their limitations, to study the impact of standardized energy-saving mechanisms on the battery life of NB-IoT devices, both in isolation and combined, and to provide guidelines on how to configure NB-IoT devices to reduce energy consumption efficiently. The research aims to provide a deeper understanding of the effect of energy-saving mechanisms and best practices to balance energy efficiency and performance of NB-IoT devices. Applying the proposed solutions makes it possible to achieve a battery life of 10~years or more for CIoT devices.

We are at a time when energy efficiency and the reduction in the use of non-renewable energy is an important objective in all aspects and will continue to be so, therefore it is necessary to try to reduce energy and heat losses in the systems used in homes and, in particular, in the domestic hot water (DHW) system. This study aims to find out the advantages and disadvantages of an innovative pipe-in-pipe (PIP) system for DHW circulation with respect to the conventional system of two separate pipes. Previous studies have shown that DHW circulation is indeed an important point of energy losses in the home and that it is possible to reduce these losses by using the innovative system under study. The properties and coefficients defining the heat transfer system have been obtained for both the traditional and innovative systems by using empirical equations and iterative processes, indicating a 32% reduction in heat losses in favour of the pipe-in-pipe system. However, this result has been obtained in a kind of case study, using some simplifying assumptions, needed to accomplish to work within limited time. So the result could vary if a somewhat different system is studied, which is why it is necessary to carry out further studies and research on this subject in order optimize DHW systems in buildings.

yes / In all industrial petrochemical plants and refineries, the furnace is the source of heat resulting from fuel combustion with air. The model-based furnace simulation is considered one of the efficient methods help to reduce the energy loss and maintain fixed refinery revenues, conserving energy, and finally reducing external fuel consumption and total fuel cost. In this paper, a model-based simulation is carried out for a natural air draught industrial scale furnace related to Liquified Petroleum Gas (LPG) production plant in Libya to thoroughly investigate the most responsible factors in lowering the furnace butane exit temperature, which is supposed to be two degrees Fahrenheit higher than inlet temperature. Therefore, to resolve this industrial problem, Aspen Hysys V10, coupling with EDR (exchanger design and rating) is used to carry out rigorous model-based simulation. This is specifically used to assess the impact of heat loss from inside the firebox to the surrounding medium and heat loss from the furnace stack and walls, besides the effect of excess air on the furnace efficiency. Furthermore, this research intends to verify whether the operating conditions, such as furnace tubes inlet flow rate, temperature and pumping pressure, are conforming to the upstream process design specifications or need to be adjusted. The results confirm that increasing furnace outlet temperature two degrees Fahrenheit from off specification 190 °F instead of 184 °F is successfully achieved by decreasing upstream stream flowrate 25% below the operating value and cutback excess air gradually until 20%. Also, the results clarify the necessity of increasing the flue gas temperature by 7% over design condition, to gain a significant reduction of heat loss of 31.6% and reach as low as 35.5 MBtu/hr. This improvement is achieved using optimum operating conditions of an excess air of 20%, and flue gas oxygen content of 3.3% delivered to stack. Accordingly, the furnace efficiency has been increased by 18% to hit 58.9%. Furthermore, the heat loss from the furnace walls can be also reduced by 68% from 5.41 MBtu/hr to 1.7 MBtu/hr by increasing the refractory wall thickness to 6 in., which entails an increase in the furnace efficiency by 3.66% to reach 58.96%. Decreasing the heat loss fraction through the refractory wall, pip doors, expansion windows and refractory hair cracks would also increase the efficiency by 21% to reach a high of 59.7%. Accordingly, a significant reduction in daily fuel consumption is observed, which costs 1.7 M$ per year. The outcomes of this research clearly show the potential of reducing the operation and maintenance costs significantly.

Исследование влияния отопительных систем и конструктивных особенностей на энергетическую и экономическую эффективность индивидуальных жилых зданий. / The most effective variant of a heating system and a constructive system for increasing the energy and economic efficiency of an individual residential building are proposed.

Due to global warming, all industries must do everything they can to prevent temperature increases. In this bachelor thesis, the reader will get a description of how the marine industry is tackling the environmental problem and more precisely what a vessel can be equipped with to reduce fuel consumption.   The thesis deals with how different energy saving devices (ESD) affect the propulsion efficiency of a chemtanker sailing on the sea. The thesis will address the following three different concept: Pre-swirl stator, Pre-swirl duct, Pre-duct. The work will step-by-step describe the different optimization parameters that need to be adjusted and what impact these parameters have on the wake field of the propeller plane.  The work addresses some different devices that will reduce the fuel consumption of ships and that these devices not only reduce fuel consumption, but also have a positive impact on cavitation. The result of this thesis was that ESD will reduce the power needed to reach the desired speed of the vessel and after post-processing was made, the best result, which was Pre-swirl stator, showed an energy saving percentage of as much as 3.15% and the risk of cavity occurring at the propeller tip was also reduced.

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Can a tool effectively aid user experience (UX) and user interface (UI) designers, along with frontend developers, in implementing more energy efficient websites? The foundation for formulating the thesis questions and identifying the issue was laid through an exploration of related work. This study aims to present the development of a tool encompassing recommendations and practices from existing research, providing valuable support for designers and developers.  Several methods, namely six, were established to better define and concretise the problems. The idea phase continued exploring potential solution both through looking at similar solutions as well as doing workshops together with potential users. In this phase the guidelines, now named SCOPES - System Conscious of Potential Energy Saving, started taking shape. The prototype was designed to assist web designers and developers in reducing energy consumption during website development. The study and especially the test phase found that guidelines empowered web designers to create energy efficient web pages, and users accept lower energy pages when aware of their efficiency, given that essential functionalities are retained.  The results of this thesis, supported by a total of 16 methods and 64 users with various backgrounds, ethnicities, and genders, emphasize the importance of addressing the challenges, posed by our energy-demanding society, pointing to potential pathways for a more sustainable and efficient future.

This thesis deals with the energy saving in smart building with focus on the impact of the user behaviour on the energy consumption. The problem of human behaviour modelling has been widely studied in the state of the art, but it is still an open problem in the field of smart building since the stochastic nature of the behaviour is difficult to be accurately represented by numerical tools. An interdisciplinary approach is proposed in order to identify the suitable user features from the psychological and social point of view and to integrate such a representation into a DSS for appliance scheduling and energy cost reduction. The proposed method has exploited location-based features of the users in order to represent their habits and needs and to compute the schedules that maximize the user acceptance toward an “energy-aware” behaviour. The obtained results point out a reduction of the peak-to-average ratio higher than 40% also considering the user constraints imposed by their presence into the building.

Energy consumption is one of the major concerns in the current environment, not only because of the limited availability of non-renewable fuels, but also due to the high cost and the pollution generated by energy production. In general, industries consume large quantities of electricity, fuels and other types of energy. Among the industries, the chemical industry is one of the highest energy consumers because of the nature of its processes. This fact makes the chemical industry one of the best candidates for the study and evaluation of different technologies to improve the efficiency of the energy use without affecting the productivity and quality of their processes and products. This thesis analyzes the energy consumption in the chemical industry and provides recommendations to increase the energy efficiency of the critical systems utilized in this industry. Different methods to reduce the energy losses during generation and transmission, the use of waste heat for improving energy efficiency, and several analysis tools to help in evaluating the potential energy and cost savings for each facility are also discussed in this thesis. Several case studies are reviewed to demonstrate the effectiveness of the energy savings recommendations and tools presented in this investigation.