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COMPUTER SYSTEM AND MODELLING OF THREATS TO ENERGY SECURITY OF MOLDOVA IN CASE OF INTERSYSTEM COMMUNICATION DISCONNECTION
Authors: Bicova E.V.,
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Abstract: In the paper modeling of a group of scenarios of threats to energetic security of Moldovan energy system, which occur in case of disconnecting (or limitation of cross-flows of electricity) of 330 kV transmission line Balti-Dniester HPS. It was used for analysis a software application for energy security monitoring. The application has been developed in IE ASM. |
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Keywords: energy security, threat, scenario, modeling.
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CONTROLLED INTERSYSTEM COMMUNICATION
Authors: D. ZAITEV, M.TIRSU, I.GOLUB, N.GORE
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Abstract: There are described results of researches regarding application of the new means for control of mode of electric power transmission and distribution on the basis of IPC (Interphase Power Controller) taking into account development of external connections of the Moldavian power supply system. The variant of application of classical IPC on base of High Voltage Line Beltsy-Suceava is considered. The management method by power flows in this section on the basis of application of PST (Phase Shift transformer), connected in parallel with IPC is offered and investigated and its technical efficiency is proved. |
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Keywords: transmission line, phase shift transformer, IPC, transmission capacity, equivalent scheme of replacement.
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DESIGN of ASYMMETRICAL MODE of RURAL AIR ELECTRIC NETWORK 0,38/0,22 KV
Authors: U. Svergun, A. Miroshnyk
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Abstract: method of networks schemes design is proposed for the calculation of the asymmetrical modes of air electric networks 0,38/0,22 kV and their design with the help of Electronic Workbench software. |
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Keywords: electric energy quality, asymmetrical mode, monophase users, losses of electric energy.
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THE USE OF THE RENEWABLE ENERGY SOURCES – AS THE WAY TO GET OVER MACRO-ECONOMIC IMBALANCES
Authors: L.Y. KHMELNITSKY
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Abstract: The article describes major groups of current macroeconomic risks. Major challenges of modern world energy development are described and the spotlight on renewable energy sources as one of mechanisms of the described problems solution. Major requirements applied to government support schemes for renewable energy development are stated as well. |
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Keywords: renewable energy sources, government support schemes for renewable energy sources, green certificates, feed-in-tarrif.
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TEHNOLOGY AND EQUIPMENT FOR BIOFUEL PRODUCTION FROM RAPESEED OIL
Authors: Slusarenko V.V.
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Abstract: The paper gives a brief overview of technologies and equipment for the production of biofuel from rapeseed oil - biodiesel. It is presented the description of the processes both cyclical (periodic) nature and processes of continuous production. It is justified the use of the type of the process in dependence of production volume. |
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Keywords: biodiesel, rapeseed oil, diesel engine, methyl ester of rapeseed oil, transesterification process, methoxide.
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MULTIFUNCTIONAL SOLAR SYSTEMS FOR HEATING AND COOLING
Authors: Doroshenko A.V., Silich S.S.
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Abstract: The basic circuits of multifunctional solar systems of air drainage, heating (hot water supply and heating), cooling and air conditioning are developed on the basis of open absorption cycle with a direct absorbent regeneration. Basic decisions for new generation of gas-liquid solar collectors are developed. Heat-mass-transfer apparatus included in evaporative cooling system, are based on film interaction of flows of gas and liquid and in them, for the creation of nozzle, multi-channel structures from polymeric materials and porous ceramics are used. Preliminary analysis of multifunctional systems possibilities is implemented. |
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Keywords: multifunctional systems, solar energy, solar collectors, regeneration, evaporative cooling, polymeric materials, porous ceramics.
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ABSORBTION DRYING-EVAPORATIVE HEAT USING SYSMEMS FOR COLD PRODUCTION WITH THE USE OF ALTERNATIVE ENERGY SOURCES
Authors: Doroshenco A.V., , Hasan Sadi Ibraghim
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Abstract: Direct and indirect evaporative coolers with nozzles based on multi channel and multi layer polymeric structures are examined in the paper. Such coolers can be used in both independent and combined variants, as well as a part of solar drying-evaporative systems. Heat required for the regeneration of absorbent is provided with solar energy from flat solar collectors from polymeric materials. |
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Keywords: indirect evaporative cooling, drainage of air and evaporative cooling, solar energy
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TWO-PHASE EJECTOR of CARBON DIOXIDE HEAT PUMP CALCULUS
Authors:
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TWO-PHASE EJECTOR of CARBON DIOXIDE HEAT PUMP CALCULUS
Authors: Sit B.
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Abstract: It is presented the calculus of the two-phase ejector for carbon dioxide heat pump. The method of calculus is based on the method elaborated by S.M. Kandil, W.E. Lear, S.A. Sherif, and is modified taking into account entrainment ratio as the input for the calculus. |
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Keywords: two-phase ejector, carbon dioxide, heat pump.
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EFFICIENCY OF APPLICATION OF PHASE CONTROL OF ELECTROTRANSMISSION OF HIGH NATURAL POWER CAPACITY
Authors: V.M. Postolaty,
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Abstract: Modeling of power systems, containing a transmission line of high natural power. There are calculated modes of transmission lines and flowing through them power flows at the phase control. There are studied at specific examples of energy systems dependencies of values of fluxes of power along lines of 220,400,500 kV from the angular shift of vectors of voltages which are imposed by phase rotation devices. |
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Keywords: power system, compact transmission line, controlled selfcompensating transmission line, power flow, phase controlled , phase controlling devices
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