64 research outputs found
Personal ventilation systems as required research and design.
No full textThis master’s thesis is focused on the analysis of personalized ventilation systems. The aim of this work was to design ventilation system based on the analysis of contaminant dispersion and thermal comfort parameters for the customs office building. The air supply systems will provide fresh air directly for each occupant and 3 types of air supply diffusers were numerically simulated. After air distribution selection, recommendations on ventilation system control were given. Ventilation equipment and required materials calculations, as well as estimate price for its installation are provided in this work. Work size: 38 p. of explanatory text, 21 p. appendices and 5 A1 drawings
Rechearch and design of displacement ventilation systems.
No full textFinal master work consists of heating and ventilation system design for the logistics center, and contaminant dispersion analysis for typical premises. The aim of the work is to numerically analyze the dispersion of pollutants for the selected room with displacement ventilation by performing computational fluid dynamics (CFD) simulations, as well as to design heating, ventilation and smoke exhaust systems in accordance with applicable normative documents. „Flovent 9.3” simulation program is used to analyze pollutant dispersion in the administrative premises of the logistics center. The results are applied to the design ventilation systems. Engineering systems and equipment part consists of the heating, ventilation and smoke exhaust system design and equipment selection. Building materials, heating and ventilation systems design, environmental and safety requirements are presented in the work
Impact of the "Closed Cavity" facade technology on energy performance of buildings.
No full textPeople spend about 80-90% of their time in buildings. That is why, when designing new and renovating old buildings, more and more attention is paid to ensuring the microclimate and energy efficiency of the premises. In most buildings, attempts are made to regulate the temperature and air quality by opening windows and doors, using individual ventilation, conditioning and heating systems. In most cases, these options are not energy efficient. Proper facade can protect the premises from overheating, increase the energy efficiency of the building. Nowadays, it is very popular to design most of the facade of a building from glass structures. With this in mind, the aim of this master's thesis was to investigate how different facades can change the energy consumption in the “Sky office”, using the IDA ICE dynamic energy consumption modeling program and literature sources. The final master's thesis examines the “Sky office” building currently under construction in Vilnius. During the experiment, the IDA ICE program examined glass facades: single-layer, double unventilated, so-called Closed cavity facades. The double ventilated facade has been studied with the help of literature sources. The obtained modeling results showed that the enclosure of enclosed spaces can be efficient and save 22.5% of energy for the supply of the building compared to the single-layer facade and 4.3% compared to the double ventilated facade. The choice of façade is greatly influenced by the installation price, which ranges between 600-850 Eur / m2 in all cases, and maintenance costs, in this respect the costs of single-layer and closed-cavity façades remain almost unchanged, and double ventilated façade costs can be as high as 7 Eur / m2. After completion of modeling and calculation of savings, installation and maintenance costs, the payback period of the closed cavity façade (compared to the single-layer façade) was calculated to be 38 years
Analysis of ductless personalized ventilation systems.
No full textThe final project overview ductless personalized ventilation system, operating displacement ventilation in ventilated areas. Prepared computational fluid dynamics computer model evaluating the impact of system for office workers thermal comfort conditions and the quality of the inhaled air. Using ductless personalized ventilation system maintained vertical temperature distribution in the area. Identified positive system impact of the work area microclimate conditions applications for individual workers' perception of thermal comfort. Prepared project part of ductless personalized ventilation system operating displacement ventilation adaptation for open-plan office space in the building. Ventilation systems for efficient operation throughout the year, adapted and designed for underfloor heating and passive chilled beams
Analysis of heat gains reduction and solar shading techniques in builidings.
No full textAnalysis of heating gains reduction and solar shading techniques was performed in Master thesis. Temperature variation was evaluated in classrooms with different kind of windows shading. In classroom were used inside roller blinds and vertical blinds. Software ESBO/ProClim was used for solar gains modeling. Modeling method made with program ESBO/ ProClim. This simulation program helped to evaluate heating gain reduction when windows are shading with internal roller blinds, vertical blinds and external automatic louvers. Economical comprehensive research was made for shading and cooling systems. Evaluated cooling system‘s units, shading system blinds‘ price and electricity price for cooling system. In this method of comparison were found the most effective glass shading type. Heating, ventilation and air conditioning systems for office building in Vilnius were designed in Master thesis final work. Radiators and fan – coils were selected according to calculations of heating and cooling. Exterior automatic louvers were designed for efficient cooling energy. Mechanical ventilation system designed with plate heat exchanger. In boiler room designed three gas boilers, which prepares hot water for heating, ventilation and domestic hot water. Estimation of cooling system were performed with software Sistela
Design of engineering systems of individual house in Kaunas.
No full textIn this work heating, ventilation, water supply, wastewater and gas supply systems are designed for individual house in Kaunas. The aim of this work is to calculate and choose materials and equipment required for the installation of engineering systems. To choose the heating devices, heat source - gas boiler, water supply and wastewater pipeline with necessary fittings. After designing all systems, bill of materials and estimate is formed for ventiliation system
Analysis of radiant heating and cooling systems in office buildings.
No full textAnalysis of radiant heating and cooling systems in office buildings was performed in the master thesis. The research of master thesis was made in office building where radiant heating and cooling systems are in operation. During the research there was made a survey for company employees and experimental measurements. By using software the model of the research object and reliability analysis was created. There were created 3 different types of heating and cooling systems in the model. The comparison of thermal comfort conditions created by different systems and energy consumptions for heating and cooling was done
Automatizuota statybos eigos stebėsena taikant fotogrametrijos ir lazerinio skenavimo metodus.
No full textCurrently, technologies such as building information modelling (BIM), laser scanning and photogrammetry are becoming commonplace in modern construction. Each construction project requires progress monitoring to ensure up-to-date information is available. Automating the construction progress monitoring process using these technologies can increase the overall efficiency of construction process and improve the overall performance. This research aims to investigate the application of photogrammetry and laser scanning for construction progress monitoring, from earthworks control to building object monitoring; and to develop a methodology for automating this process, focusing on the automated detection of objects in construction environment based on IFC and laser scan data integration. During the earthworks phase, experiments were conducted using advanced drone-based photogrammetric workflows to understand how these technologies affect the nature of work compared to the traditional methods in terms of accuracy, reliability, and time. During building construction phase, experiments were conducted by capturing as-built data using different laser scanning techniques and a methodology was developed for point cloud and IFC data integration and automated object monitoring
Kompleksinis pastatų mikroklimato sistemų poveikis lakiųjų organinių junginių koncentracijai žmogaus įkvepiamame ore.
No full textThe indoor climate in modern buildings depends on a variety of factors, such as air change rates, a presence of air pollutants, operative temperature, air distribution scheme, air velocity etc. Thermal comfort and indoor air quality in buildings are mostly influenced by the combination of heating, cooling and ventilation systems. To ensure high indoor air quality levels, it is important to either reduce emissions from pollutant sources or ensure effective removal of these emissions. The most significant air pollution sources in modern buildings are household chemicals, finishing materials and furnishings. To accurately assess the impact of air pollutant sources on occupants, particular attention should be paid to the isothermal pollutants released at the near-floor level, because of the human convective boundary layer ability to elevate pollutants to breathing level. The most frequent sources of such pollutants are floor coverings, cleaning products, varnishes and others that emit volatile organic compounds. Volatile organic compounds are produced by evaporation of materials at room temperature, and therefore they can be classified as isothermal pollutants. Furthermore, their density and temperature are not significantly different from the indoor air density and temperature. Therefore, the dispersion of such pollutants is influenced by indoor climate parameters (air temperature and air velocity), air distribution scheme and convective flows in rooms. Dispersion of volatile organic compounds released at a near-floor level under different combinations of heating systems and air distribution schemes was investigated experimentally in the full-scale test chamber and simulated using computational fluid dynamics software. It was determined that a combination of heating and air distribution schemes should be carefully considered in cases where sedentary activities are carried out in buildings and the presence of near-floor level emitted pollutants cannot be avoided. The focus should be on the heating system type, as the effect of air distribution is comparatively minor
Analyst of passive cooling systems design of ventilation and heating sistems for private clinics.
No full textMaster's thesis is a private clinic, located in the city of Kaunas, design of ventilation and heating systems. The aim - to design such ventilation and heating for the proper operation of the premises, under normal field conditions can be maintained microclimate and air quality parameters. Private clinics substation is designed on the basis of the heat supplier issued technical conditions. The heat networks are connected by an independent scheme. The substation is designed with one heat exchanger for heating system. Ventilation and heating systems are designed in accordance with the estimated amounts of indoor air, heat losses, indoor use, and they will take place in. In order to increase the energy efficiency of buildings, it is planned to adapt the passive cooling method private clinics ventilation systems design part. Economic calculations and heating up a heating, ventilation systems estimate
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