Development of a laboratory nozzle chamber installation for the humidification of buildings

Abstract

The nozzle chamber, in which water is sprayed into the air stream using mechanical nozzles, is the main unit for these processes in central air conditioning systems (AHUs). The types of nozzles used do not have a sufficiently high effect of interfacial surface forming due to increased metal usage and the broad total dimensions of certain chambers, i.e., they do not have intensive heat and mass transfer. The authors performed testing of the apparatus in the direct iso-enthalpic air cooling mode to improve the performance of the nozzle chamber. Thus, the experiments conducted confirm the relatively high efficiency of FET operation at small values of irrigation coefficient B ≥ 1.0. The area highlighted is characterised by the unstable operation of other nozzle types. Therefore, FET nozzles can be operated at irrigation factor values B = 0.1…1.0. Experiments have shown that this equation is applicable for practical calculations, with a relative error of ±6.7%. The aerodynamic resistance of the spray chamber nozzle chambers is also according to the data not exceeding 160 Pa.

Study on the effect of grain moisture on grinding efficiency

“…The results of other researchers [13,14,15] confirm when excess moisture in the crushed grain material negatively affects the milling process. The increased moisture content increases the plasticity of the particles and the energy intensity of the process.…”

“…The internal friction between particles is closely related to the fact that the coarser particles are generally less spherical. of particular, the irregular forms of coarse particles have a substantial impact on the powder flow properties [10][11][12][13][14][15]. In feed mills and livestock farms, hammer mills are mainly used to crush concentrates.…”

Study on the combined use of solar and water energy in power supply systems

“…For the efficient use of renewable energy sources, the optimal dimensions of the necessary energy devices of solar and hydroelectric power plants consumed in a combined power supply system are determined. Solar batteries and hydro turbines are characterized by various technical indicators, the main of which is the efficiency of the solar collector and hydro turbine [21,22,23,24]. The solar collector is characterized by the installation angle [25], and the hydro turbine is characterized by the speed of water movement [26].…”

Analysis of ionic equilibria by water treatment stage and calculation of monitored parameters

“…Depending on the temperature of the solution, the numerical values of the called dissociation constants change and the analytical expressions for their estimation can be written as negative logarithms (Eq. 9) [7,8].…”