Ursatii Nicolai

Ursatii Nicolai
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Ursatii verified their affiliation via an institutional email.
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Ursatii verified their affiliation via an institutional email.
  • Phd student
  • Scientific researcher at Technical University of Moldova

About

20
Publications
168
Reads
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1
Citation
Introduction
Areas of interest in scientific research: energy sector, electrotechnology for the preservation of agri-food products and renewable energy sources, which are the most important alternative energy sources and are considered the "energy of the future"
Current institution
Technical University of Moldova
Current position
  • Scientific researcher
Education
November 2019
Technical University of Moldova
Field of study
  • Engineering sciences
September 2008 - January 2010
Technical University of Moldova
Field of study
  • Electrical engineering
September 2004 - June 2008
Technical University of Moldova
Field of study
  • Electrical engineering

Publications

Publications (20)
Article
Full-text available
The paper presented the current situation regarding the pre-cooling and cooling processes of milk at the collection centers in the countries of the European Union and in the Republic of Moldova. It has been found that cooling the milk in the first hours after milking is very important. In order to reduce the risk of milk spoilage in the collection...
Patent
Full-text available
Invenţia se referă la tehnica de captare şi depozitare a frigului natural şi artificial în diferite perioade ale anului, şi poate fi utilizată la punctele de colectare a laptelui şi la ferme mici pentru răcirea şi păstrarea produselor agroalimentare, în special pentru răcirea primară a laptelui. Instalaţia de răcire a laptelui cu utilizarea frigulu...
Article
Full-text available
The purpose of this paper is to present a study on improving energy efficiency in small agro-processing enterprises through renewable energy sources. As an example in this study 5 small processing enterprises were selected and the basic parameters of the electrical installations in these enterprises were determined and the actual installed power an...
Article
Full-text available
The aim of the study was to prove the economic and environmental advantages of installing pho-tovoltaic sources in the power supply systems of some agricultural product processing enterprises. In order to achieve the aim, the performance in terms of how to install, connect and meter the pho-tovoltaic system for green electricity generation was anal...
Book
Full-text available
Monografia se referă la dezvoltarea tehnologiilor si producerea echipamentelor ecologice pentru răcirea primară a materiei prime la fermele și punctele de colectare a laptelui din Republica Moldova.
Article
Full-text available
The aim of this paper is to optimize the technological parameters of the ecological milk cooling plant with the application of natural cold, which ensures a significant increase in energy efficiency at collection points in the Republic of Moldova. The proposed plant captures the natural cold and stores it in the insulated cold accumulator without t...
Article
Full-text available
This article presents an experimental refrigeration plant equipped with a hybrid cooling system, which was developed at the Technical University of Moldova as a result of the cooperation of researchers from the Electrical Engineering, Mechanical Engineering and Production Engineering Departments to study the cooling process of various agricultural...
Book
Full-text available
Tehnica tradițională ce utilizează frigul artificial pentru conservarea produselor alimentare este dăunătoare din punct de vedere ecologic, deoarece folosește diferite tipuri de freon, necesită consum important de energie electrică și încăperi suplimentare pentru instalarea utilajului specific. Tehnica netradițională de folosire a frigului natural...
Article
Full-text available
This article presents an experimental electrical system that was developed at the Technical University of Moldova as a result of cooperation between researchers from the Electrical Engineering, Mechanical Engineering and Production Engineering Departments in conducting joint research on the effectiveness of the dehydration process for agricultural...
Article
Full-text available
The authors present a study on the reduction of electric energy consumption in the process of preserving agri-food products. Refrigeration facilities used to cool various easily perishable agri-food products were examined in order to establish solutions for increasing energy efficiency in the storage process. The proposed solution provides for the...
Conference Paper
Full-text available
Rezultatele prezentate se referă la consumul de energie electrică pentru răcirea laptelui raportat la volumul de lapte colectat de la fermierii individuali. Scopul lucrării este de a stabili consumul mediu de energie electrică necesar pentru răcirea unui volum de lapte și înaintarea propunerilor pentru reducerea consumului de energie electrică. P...
Conference Paper
Full-text available
The paper presented a study of synchronous machines with permanent magnets and axial magnetic flux for its implementation in the supply of electricity to agricultural consumers. Different topologies of these machines were analyzed using the toroidal stator winding. We came up with proposals to improve the topology of the synchronous generator with...
Conference Paper
Full-text available
The paper presented a study of synchronous machines with permanent magnets and axial magnetic flux for its implementation in the supply of electricity to agricultural consumers. Different topologies of these machines were analyzed using the toroidal stator winding. We came up with proposals to improve the topology of the synchronous generator with...
Conference Paper
Full-text available
The paper discusses the features, goals and objectives of research of automated technological lines for milk processing as control objects. It is shown that theoretical research is needed, the essence of which is to adapt the general theoretical provisions of computational mathematics, systems engineering, theory of operations, algebra of logic and...
Conference Paper
Full-text available
The paper considers the advanced foreign and domestic experience in the development of technologies and lines for primary processing of milk on farms. It is shown that in order to achieve a further increase in the level of automation of lines and a radical decrease in specific energy consumption for milk processing, it is impossible without optimiz...
Article
Full-text available
The aim of the study is to reduce electricity consumption in rural milk collection points from the population. The paper presented a study on milk cooling refrigeration installations used at milk collection points in the Republic of Moldova. The design of the installation and the ratio of its electricity consumption nodes were analyzed. In order to...
Conference Paper
Full-text available
In lucrare este descrisă reţeauă hidrografică din Republica Moldova şi unile aspecte istorice a microcen-tralelor hidroelectrice (MCHE) de pe teritoriul ţării. Sunt prezentate machete de microhidrocentrale, care nu necesită baraje, elaborate în cadrul Universităţii Tehnice a Moldovei.
Article
Full-text available
Fluxes and dispersion reactance of the frontal sides of asynchronous machine windings were determined by applying the finite element method. The obtained results had been compared with the application of FEMM program and the results obtained by finite element method. The obtained results had been compared with the application of FEMM program and th...
Article
Full-text available
Abstract The possibilities of elaborating a synchronous generator with permanent magnets and a smooth air gap had been analyzed. It was analytically proved that the harmonics of denture order disappear from the magnetic inductance curve if mounting the stator winding directly on the package yoke of the generator. The repartition of the magnetic flu...
Conference Paper
Full-text available
The paperwork illustrates a synchronous generator with permanent magnets where the winding is mounted directly on the interior side of the no slotted armature, which simplifies the design technology for this type of generator. It is proved that the armature's reaction is six times reduced, approximately, the toothing harmonics are removed and the e...

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