Pateikto magistrantūros baigiamojo darbo tikslas – išmatuoti degimo proceso kokybę, atlikti reguliavimus. Išnagrinėti galimybę automatiškai ir optimaliai valdyti kieto kuro katilo degimo procesą. Palyginti gautus eksperimento rezultatus, vykdant degimo proceso reguliavimus. Darbe išanalizuotas medienos biomasės panaudojimo Lietuvoje potencialas. Pateiktos technologijos šiluminės energijos gamybai decentralizuotam šildyme. Pristatyti automatinio reguliavimo sistemos principai. Pateikta tyrimo metodika, rezultatai. / The aim of master thesis is – measure results burning process quality and curry out regulation. The research possibility control solid fuel boilers burning process. There is made an analysis of biomass utilizing potential in Lithuania. There is listed technology’s in heating production. Also in this work are given the rules of system automatic control. There is a listed research methodic, results.

Šiaudų briketais kūrenamo katilo energetiniai parametrai išnagrinėti magistrantūros baigiamajame darbe. Aptartas šiaudų, kaip kuro potencialas Lietuvoje, jų ištekliai bei panaudojimo galimybės kurui. Apžvelgtas šiaudų ruošimas kūrenimui, šiaudų kūrenimo būdai, įrenginiai, kurie gamina briketus, bei katilai kūrenami šiaudų briketais. Darbe yra pateikta šiaudų kuro sudėtis, kenksmingų medžiagų kiekiai, briketų energetinis efektyvumas ir ekonominė reikšmė. Tyrimo tikslas yra apskaičiuoti degimo proceso šiluminę galią, nustatyti katilo šiluminę galią, apskaičiuoti katilo efektyvumą esant skirtingai šiaudų briketų drėgmei bei masei. Į aplinką išmetamų kenksmingų emisijų nustatymas. Teoriškai ir eksperimentiškai ištyrus 10 kW galios katilą nustatyta, kad didžiausia katilo galia Pk prie 12 % šiaudų briketų drėgnio yra 23,17 kW, esant 14 % drėgniui, didžiausia katilo galia yra 15,99 kW, o esant 16 % drėgniui – 11,48 kW. Esant maksimaliam katilo efektyvumui, kai ηvid =77,2 %, katilo galia Pk yra 23,17 kW, o degimo proceso Pd galia padidėja iki 29,03 kW. Kai katilo naudingumo koeficientas yra maksimalus (ηvid =77,2 %), tada kuro sąnaudos siekia7 kg/h.Darbe pateikti šiaudų briketų deginimo tyrimų rezultatai. Tyrimų metu gauti ir apskaičiuoti rezultatai pateikti lentelėse, bei pavaizduoti grafiškai. / In the master’s thesis energetic parameters of the boiler heated by straw briquettes were analyzed. The potential of straw as a fuel in Lithuania, its resources and usage for fuel were discussed. The review of preparation of straw for heating, ways of heating with straw, equipment that makes briquettes and boilers heated by straw briquettes was performed. The paper presents the composition of straw fuel, the amounts of harmful materials, energetic efficiency of briquettes and economic significance. The aim of the research is to calculate the thermal power of the burning process, to define the thermal power of the boiler, to calculate the efficiency of the boiler at different humidity and mass of straw briquettes, to define the harmful emissions that affect the environment. Having analyzed theoretically and experimentally the boiler of 10 kW power, it was defined that the highest power Pk achieved at 12 % straw briquette humidity is 23,17 kW, when the humidity is 14 % , the highest power of the boiler is 15,99 kW, whereas at the 16 % humidity it is 11,48 kW. At the maximum power of the boiler, when ηvid =77,2 %, the power of the boiler Pk is 23,17 kW, the power of the burning process Pd reaches 29,03 kW. When the efficiency coefficient of the boiler is ultimate (ηvid = 55,3 %), the input of fuel reaches 7 kg/h. The paper presents the results of the research on burning straw briquettes. According to the results, different parameters mentioned in the research aims were... [to full text]

This work deals with issues aimed at the possibility of treating the material which has not been used yet – coal tailings. The work includes among others the production, its optimalization and utilization of a new type of lightweight artificial aggregate in the process of production of concrete. The possibility of manufactured the artificial aggregate is dealt with the principle of self-burning of the raw material's batch at the agglomerative grate. The optimalization of the burning process was performed both with the homogenous and the layered batch. Further part of the work focuses on the fabrication of diverse types of concrete and determination of their parametres. This section is significantly extended with the comparison of basic physical and specific properities of the new type of concrete with those of the commonly produced types. The last part of presented work deals with the ecological - economic situation of these issues. The proposed solution points to the possibility of utilization of the coal tailings which are put to the tailings heaps. It was managed to optimize the burning process and to find the most convenient system for storing the raw material's batch at the agglomerative grate. Next, it was proved that the types of concrete produced with a new sort of aggregate are also suitable for fabricating the construction concrete with the strength above the border of 50 MPa, which are applicable even in harder conditions. These sorts of concrete also have a lower volume weight and very good bending properties. The major finding, which underlines the contribution of this work, is that the up to now unused material is suitable for fabrication of relatively high-quality and thermally stable aggregate of strength on the border of 5 MPa, which can be use for fabricating concrete with very good results even in this field. Another great contribution of this work can surely be the fact, that a preliminary economic balance of the manufacturing pr

Thesis deals with stoves, considering them as the main source of heating. The theoretical part is focused on practical and theoretical stove designing and burnnig proces. The designing addresses three of the countless variations on the koncept of modern stove heating. Each variant is unique in its technical and design way of solution. Experiment affects the properties hypokaust stove.