International Scientific Journals
of Scientific Technical Union of Mechanical Engineering "Industry 4.0"

Numerous publications in the literature deal with the investigation of evaporation under forced convection; however, no correlation between the available equations would describe the process and the evaporation rate with high reliability and in a wide range of interpretation. The main parameters influencing the evaporation rate are air temperature, relative humidity and velocity of air, liquid temperature, and the surface area of the evaporating liquid. The cases of evaporation were categorized as a function of the indicated parameters under forced convection. For the case with constant gas and liquid parameters, a general Sherwood equation was created using the literature results which can be used to estimate the rate of evaporation, the rate of mass transfer. For this, an equivalent characteristic length and the ratio of gas and liquid temperature were determined

The main goal of my work was to design a dry well wastewater pumping station. The products of the pumping station market, the related literature, and the standards were analysed. The collected information was summarized in the catalogue of the requirements. I created the parametric 3D model of the total pumping station. Some of the dimensions are linked from an MS Excel file, and others change like a function. Thus, we can get the pumping station model with the required parameters without changing the model directly. The system’s pressure loss was calculated, which is necessary to know the working point of the pumping station. The mass of the concrete we need against the uplift was specified. The dry well makes the sewage system more stable; it has a lower environmental effect and makes the maintenance safer.