This paper is focused on hot water tanks for long-term heat storage. Describes the design of the tanks and and their properties. The evaluation of tanks is based on the results of real systems. Tanks are mainly used for solar systems with long-term heat storage. The use of solar systems with long-term heat storage for building opens new possibilities for further savings of energy from non-renewable sources.
The paper is focused on the problem of measurement of gas flow in closed conduits. It deals with the physical principles of measurement and refers to standardized procedures which deal with this issue. It is also briefly discussed the measurement of temperatures and pressures as these parameters are important for calculations of flow.
Uncertainty internal heat gains as a result of the behavior of the population can be interpreted in two ways: uncertainty of the total population, which will tend to triangular division and uncertainty of metabolism. The our uncertainty analysis of internal heat gains based on the assumption that a household uses the only electrical energy (P1.14/BA).
In 2014 enters or has entered into a joint program to promote the replacement of the obsolete boilers at least five counties. Grants are intended solely for individuals who own property in the county. In addition to its purchase of the boiler it is possible to grant eligible costs include heating, the purchase of pumps, storage tanks, etc.
Reduce the amount of air emissions, provide households and businesses cheaper to heat and at the same time stimulate the economy and encourage the market for renewable energy sources - these are common goals for the Czech, Austrian, German and British government. Each country, however, these objectives released after different way. While our currently running national subsidies in the UK came this spring with a program RHI (Renewable Heat Incentive) for households. In many ways, this program is unique worldwide and will be interesting to see whether it becomes an inspiration for other European countries, hence the Czech Republic.
Multilayer metal chimneys have some advantages over chimneys with ceramic chimney casing, but their use with solid fuel appliances in wooden houses must strictly follow all the requirements of chimney manufacturer and be in accordance to current norms in order to secure the fire safety of the building. This concerns in particular the passages of chimneys and flues through wooden building structures.
In newly constructed and renovated buildings more often dynamically controllable sources of heat are used. In the recreational buildings dominate cookers and ovens with a combined fan and storage function. It is mainly caused by changes in the energy requirements of buildings, which decreases every year and the market is focused primarily on this type of stoves. But tiled stoves have still a lot to offer - design and use value. Properly designed tiled stoves are suitable also for the low-energy houses and can serve as a primary heat source for heating the house and their efficiency is very high. This article tries to clarify some concepts and principles of proper design of tiled stoves.
This article assesses the subject of modern and efficient ways of using energy from wood that has been widely discussed within the scientific lectures on fair TECHAGRO and BIOMASS 2014. The author outlines the development of the cross-section of the use of wood fuels from forest management in the context of the application of forest logging residues, or sawdust from wood processing industry in the energy sector in the Czech Republic.
Air change rate in a building depends on the weather conditions, building envelope tightness, operation of technical equipment and user activity. On object structural system P1.14/BA were during the heating season (1991–1992) monitored during the opening vent windows (wings). Take into account the impact of opening windows in addition to the minimum intensity of air change rate n = 0,5 + Δn.
Reducing the energy performance of buildings is very important. Equally important, however, is also the correct evaluation of energy savings. In practice, we meet with different approaches to the evaluation of energy efficiency, while some of them are far away from objectivity. This group also includes so called Energy League.
Power industry is one of the greatest producers of waste. The character of waste products from the power industry is quite different from waste arising from the other industrial sectors as concerns its composition, methods of removal and possibilities of use. There has been revealed within the solution of the project “The Resort Research Program in the Force of the Ministry of Environment” ref. no. SP2f3/118/08, bearing the name “the research of real properties of waste considered as an acceptable source of non-standard raw-materials (particularly the secondary by-products from the energy generation) in sense of actual legal requirements for the protection of health, environment and the evaluation of the acquired information for the determination of safety processes and requirements for their use”, that products used for the landscaping, in certain events do not fulfill requirements stipulated for the utilization of waste on the ground surface. It means that construction products made from remainders after the coal burning, being sold as safe, can contaminate the environment more than waste used for the same purpose.
This article focuses on the issue of creation of operating rules that pertain to the field of operational documentation. Operating rules are an essential part of the efficient operation of the property. This article is targeted to the content site of operating rules by various functional use of objects. A method of operation of the building affects the composition of future operating rules. In this article, the individual include the composition and structure defined according to the method of use of the building.
The efficiency of boilers is a major technical and economical parameter and indicates the degree of fuel energy utilization. The aim of this paper is to present basic approaches to determination of the efficiency calculated by direct and indirect method. In the Annex of the article is a list of technical standards (including theirs validity) which deal with determination of efficiency for various types of boilers.
Concept Data Support Department of the Ministry of Industry and Trade has prepared this statistical report as a comprehensive national statistics on renewable energy sources. The final part of the report provides statistical data of the categories Energy use of waste and alternative fuels, Hydropower, Wind Power, Photovoltaics, Solar thermal systems, Heat pumps and Geothermal energy.
One of the most important boundary conditions occuring in the thermal building simulations is the thermal power penetrated into building elements as a result of the solar radiation. Intensities of the solar radiation are usually measured by weather-stations on the horizontal plane, and thus not directly applicable for the computations. Paper provides the methodology for recomputation of the total solar radiation measured by the pyranometer on the horizontal surface to the intensities of arbitrarily oriented wall and provides simulation results for the nineteen days.
Article reviews the accuracy of the calculations of the underfloor heating in TechCON 4.0 version compared with calculations according to EN 1264.
Precision of calculations has been already compared in article “Calculation and design of hydronic floor heating” (Ing. Josef Bugáň). Article stated big differences in results, and several procedures were insufficiently explained. Is it possible that the calculation of commonly used program varies that much?
Could it be that these differences were caused by an incorrect procedure in the calculation according to EN 1264 or even by differences in the input data in both calculations?
In this article, we therefore compared the two calculations on the same project and the same program, thus completely eliminating input errors.
Correctness of the calculation procedure according to EN 1264 we verified by comparing the results of calculations with two independent programs.
