This paper focuses on the determination of the characteristics of refusals in low voltage electrical distribution systems. In order to solve this problem, the phenomena of occurrence of refusals in low-voltage electrical distribution systems, conditioned by different influencing factors, processed and mathematically modelled. The main results of the research consist in establishing the static characteristics of the refusals, the mathematical models that determine the occurrence of the cause phenomena and the parameters that characterize the distributions of the refusals, depending on the occurrence per system, depending on the occurrence per season, depending of interruptions duration and the number of affected consumers. The significance of the results obtained consists in solving a number of problems faced by the operating services of electrical distribution systems, concerning the assurance of reliability of operation, providing the possibility of forecasting and preventing the occurrence of the phenomena of occurrence of refusals, which enable the justified planning of prophylactic measures and ensuring the reliability level.
This article is devoted to estimating the effectiveness of dehydration of suspended seeds. To address this issue, a dehydration system has been developed, based on which research has been conducted. Convection and microwaves were used as the treatment agent. Thus, the results obtained on the example of drying the grape seeds, showed that the dehydration in a suspended layer ensures the increase of the process speed and reduces the drying time. Moreover, the developed system allows of reducing energy consumption and increasing the quality of grape seeds, for later use in the food industry, medicine, cosmetology, pharmaceutics etc.
The aim of this work is to improve the efficiency of the dehydration process of seeds of agricultural plants by applying the fluidized bed treatment method. In order to achieve the aim of the work, an experimental plant for the dehydration of seeds in fluidized layer was developed, based on which the research was carried out. Convection and SHF were used as sources of fluidized bed seed treatment. The efficiency of the dehydration process with the application of the developed experimental plant was estimated for 3 types of seeds of agricultural alleaginous plants: grape seeds, flax seeds and white buckthorn seeds. These types of seeds were selected for research because at present their dehydration is a problem and they have a great potential for the food industry, traditional medicine, cosmetic industry, pharmaceutical industry, etc. The main results obtained in the application of the developed plant to the treatment of seeds of agricultural plants in a fluidized layer are: increase of the dehydration process speed, reduction of the treatment time, reduction of electricity consumption, increase of the seed quality and reduction of the processing costs. Again, the plant is simple in terms of construction, easy to use, low in cost and during operation has demonstrated a high level of operational safety. The significance of the results obtained lies in the efficiency of the process of dehydration of oilseeds of agricultural plants, based on fluidized bed treatment, mainly with a reduction in the cost of technological processing and an increase in the quality of these seeds, for subsequent use in the food industry, traditional medicine, cosmetics industry, pharmaceutical industry, etc.
Studiul este consacrat eficientizării procesului de uscare a semințelor prin metoda de tratare în strat suspendat. Cercetările au fost realizate cu 3 tipuri de semințe (semințe de struguri, semințe de in și semințe de cătină albă) în baza unei instalații experimentale care utilizează în calitate de agenți de tratare convecția și SHF. Rezultatele obținute au demonstrat că tratarea semințelor în strat suspendat asigură creșterea vitezei procesului și reduce timpul de uscare. De asemenea, aplicarea instalației elaborate permite reducerea consumului de energie electrică și contribuie la reducerea cheltuielilor de prelucrare tehnologică.
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