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.
The heat pump with earth wells is a source of heat and cold for a university building in the center of Prague. Analyzes of measured data from the operation of this system are performed and the issue of parallel production of heat and cold in the context of sustainable development and buildings with minimal energy consumption is discussed.
