Email this article Study of water heating efficiency in cavitation mode at the initial stage of grain molasses preparation
- Authors: Nechaev V.N.1, Aleshkin A.V.2, Savinykh P.A.3
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Affiliations:
- Nizhny Novgorod State University of Engineering and Economics
- Vyatka State University
- Federal Agrarian Scientific Center of the North-East named after N.V. Rudnitsky
- Issue: Vol 90, No 6 (2023)
- Pages: 575-583
- Section: Economics, organization and technology of production
- URL: https://journal-vniispk.ru/0321-4443/article/view/253591
- DOI: https://doi.org/10.17816/0321-4443-569016
- ID: 253591
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Abstract
BACKGROUND: Grain molasses is a valuable source of digestible protein and feed sugar for farm animals. At the initial stage of production of this feed mixture, the existing devices and water heating schemes are not effective enough. Therefore, a new passive-type device for accelerated heating of water has been developed.
AIM: Evaluation of efficiency of a cavitator for heating water at the grain molasses production plant.
METHODS: In order to conduct studies, a cavitator made in the form of a cone with vanes, the apex angle of which is 16°8ʹ, is installed in a glass pipe of the injection branch of the water circuit of the plant for the preparation of grain molasses. During the experiments, the vanes were installed in the pipe straight or bent by 15°. In laboratory conditions, a comparative experiment was carried out to heat water with a volume of 50 liters, starting from its temperature of 20°C and through each degree to 30°C, both with and without the cavitator. The process efficiency criteria were: time and specific energy consumption of water heating.
RESULTS: As a result of the conducted studies, the values of the efficiency criteria for the water heating process with and without the cavitator are found. Linear dependence of water temperature on heating time is obtained. It has been shown that the created cavitation effect behind the base of the cone is not stable, but still more intense behind the cone with straight petals. It is noted that the coefficient of hydraulic resistance for the cavitator with vanes bent by 15 ° is 10% greater than with straight ones.
CONCLUSIONS: Use of a cavitator when heating water at the initial stage of preparing grain molasses increases efficiency of the process by 20%.
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##article.viewOnOriginalSite##About the authors
Vladimir N. Nechaev
Nizhny Novgorod State University of Engineering and Economics
Author for correspondence.
Email: nechaev-v@list.ru
ORCID iD: 0000-0002-7566-6013
SPIN-code: 9562-7900
Associate Professor, Cand. Sci. (Engineering), Associate Professor of the Technical and Biological Systems Department
Russian Federation, KnyagininoAlexey V. Aleshkin
Vyatka State University
Email: usr00008@vyatsu.ru
ORCID iD: 0000-0002-6949-1480
SPIN-code: 5084-5478
Professor, Dr. Sci. (Engineering), Professor Professor of the Mechanics and Engineering Graphics Department
Russian Federation, KirovPeter A. Savinykh
Federal Agrarian Scientific Center of the North-East named after N.V. Rudnitsky
Email: peter.savinyh@mail.ru
ORCID iD: 0000-0002-5668-8479
SPIN-code: 5868-9317
Professor, Dr. Sci. (Engineering), Head of the Mechanization of Animal Husbandry Laboratory
Russian Federation, KirovReferences
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