Thermal baths in Slovakia are producers of wastewater, which have considerable enegry potential. Wastewater often exceeds the maximum temperature that can be discharged to the recipient without harming the environment. In many cases, this requirement is not met, and swimming pool operators must face sanctions for environmental pollution. The aim of the paper is to present the possibilities of using the energy potential of wastewater, which would ensure its required temperature.
The paper focuses on the sizing of chimneys for fireplaces in which wood is burnt. Before the dimensioning itself the combustion equation and the derived equations for determining the flow of fire-wood and the flow of combustion air and gas are listed. At the end, the paper provides an example of calculation.
The first part described the real course of heating and electricity consumption by radiant panels of two family houses with different uses. In this part, the houses are compared in terms of the parameters of their indoor environment and in relation to the measured energy consumption and their energy intensity.
The article summarized overview of currently used refrigerants and termination dates consumption of prohibited refrigerants. In the past, refrigerant was used based on fully halogenated hydrocarbons (CFCs), later it was partially halogenated hydrocarbons (HCFCs), and currently are the fluorocarbons and mixtures (HFCs). The paper discussed important laws and regulations, which set out the requirements for the use of refrigerants.
The first part of the article describes the real course of heating and electricity consumption by radiant panels of two family houses with different approaches to their use. In the second part, the houses will be compared in terms of the parameters of their indoor environment in relation to the measured energy consumption and their energy intensity.
Ventilation infiltration in the form of leaking windows, doors is associated with unwanted heat leakage in cold periods. The size of the leakage depends on both the intensity of ventilation and the amount of energy contained in the air. The calculation should include not only the specific heat capacity of the dry air, but also the energy contained in the water vapor in the air.
The type of chimney determines the suitability, use, conditions of chimney installation and also plays a role in the flue gas discharge from solid, liquid and gaseous fuels. The distinction of chimneys into separate or common chimneys, system chimneys, individual and additionally lined chimneys, etc. will be described in this article.
Even heat pumps with frequency-controlled compressors are not fault-tolerant. Examples are the destruction of the frequency converter, the suction of liquid refrigerant due to the faulty operation of the expansion valve, the ignorance of service technicians, etc. Mistakes that push the economic return of the Czech Republic into the distance can be avoided.
The general term stainless steel does not describe the differences that exist between different types of stainless steel. Therefore, in the field of chimney systems, it is necessary to pay increased attention to the selection of suitable steel. Both on the part of manufacturers and chimney companies in the production of various accessories for chimney systems and, to an increased extent, also for fuel appliance operators.
The article considers the standard EN 442-2, which assumes a linear course of the temperature exponent with height for a given type of radiators. It focuses mainly on panel radiators, although it does not omit other kinds of radiators. It points to the fact that the dependence of the temperature exponent on height is not linear and increasing for a given type, as assumed by the characteristic equation of the type. Results are based on the evaluation of the data collected from the radiator manufacturers.
