Nodar Mirianashvili

მემკვიდრეობით მიწის მფლობელი გლეხი (ცენზიტარი) სენიორს ყოველწლიურადუხდიდა ფიქსირებულ ფულად რენტას (ცენზს). მასზე მომუშავე გლეხი პირადად თავისუფალი იყო. მას შეეძლო ერთი ადგილიდან მეორეზე გადასვლა, თავისი ნადელი მემკვიდრეობით გადაეცა ანდა გაეყიდა. XIV-XV საუკუნეების საფრანგეთში ცენზივა გლეხთა მიწათსარგებლობის ძირითადი ფორმა იყო. XIV საუკუნეში ქვეყნის ჩრდილოეთი ნაწილის გლეხობის უმრავლესობა პირადად თავისუფალი გახლდათ

There has been elaborated an imitative model of the heating system heat pump machinery by means of which it is possible to establish an individual objects and manufacturing technology processes in residential localities of the heating-cooling supply optimal schemes. In the report there is laid out an analysys conducted by us, of the energy-economical results of the various types of the heatins systems operating on the basis of heating pump macninery. Based on climate districts there are established heating pumps usage effective zones for various types of low potential heat sources and for heating stations of various cost.

The agriculture enterprises are large consumers of fuel and energy resources where especially sharply there is a problem of economy of fuel and energy. From the carried out research presented in the report, follows, that in brewing manufacture considerable losses of thermal energy, which reduction will be effective at applications energy saving heat pumps installations. Brewing manufacture as a result of use heat pumps installations, at the maximum development of secondary power resources, reduction of power inputs in quantity about 25¸30 % as a result of it production cost price considerably is possible decreases

The proposed report presents scientific justification for the use of complex heat supply systems through the utilization of secondary, low-potential energy resources by utilizing energy-saving heat pump installations in various industries of the agro-industrial complex, and strengthens the country's energy and ecological security.

Georgia is a small country, power grid of which goes to expand day-by-day. Nowadays Georgia has the parallel synchronous connections with Russia and Azerbaijan. In addition, Georgia will have parallel asynchronous connections (through HVDC back-to-back station) with Armenia and Turkey. This means that in near future, power transit from Russia, Azerbaijan or Armenia to Turkey through Georgian system will be implemented. Because of connection of Turkey with united European grid, Georgian system in connected to Turkey through Back-to-Back (B2B) station, which is located in Akhaltsikhe substation. In present time, two blocks are ready for operation, installation of third one in near future is planned. Nominal active power of each B2B block is 350 MW. In future, depending on scenario, there may be all three or two blocks in operation. Hence, the summary power flow will be in range of 700- 1000 MW. The abstract consists from overview of power system analysis and control. Basic overview of transient processes, concept and analysis of system stability, methods of power system control are represented here.

Today’s state of use of the sun, wind, thermal water power in Georgia and prospects for their development are analyzed. It is demonstrated that in case of extensive use of renewable, non-conventional energy resources, saving up to 15-20 percent of heat-power resources consumed in the country will be achieved. The conducted research suggests that one of the promising trends of the Georgian heat-power complex is energy saving and large-scale implementation of energy-saving technologies in the manufacturing enterprises of various branches of national economy.

From the carried out research presented in article, follows, that in food industry considerable losses of thermal energy, which reduction will be effective at applications energy saving heat pumps installations. Food industry as a result of use heat pumps installations, at the maximum development of secondary power resorcer, reduction of power inputs in quantity about 25-30% as a result of it production cost price considerably is possible decreases.

 From the carried out research presented in article, follows, that in brewing manufacture considerable losses of thermal energy, which reduction will be effective at applications energy saving heat pumps installations. Brewing

manufacture as a result of use heat pumps installations, at the maximum development of secondary power resources, reduction of power inputs in quantity about 25¸30 % as a result of it production cost price considerably is possible decreases. 

Due to the irrational organization of energy in food industry enterprises, there are significant losses of thermal energy, which Reduction is possible through a variety of measures, including the use of energy-saving heat pump installations. In the production of beer, as a result of the use of heat pump equipment, in case of maximum utilization of secondary energy resources, it is possible to reduce costs by about 25-30%, which will significantly reduce the cost of production. The research presented in the report shows that there are significant losses of thermal energy in beer production, the reduction of which will be effective by using energy-saving heat pump installations.

The prospects for the development of noon-traditional renewable energy sources, the current level of application of heat pump plants and the results achieved in this field of energy are analyzed in the world and in Georgia. The report presents the results that establish the relationship between the coefficient of conversion of heat pump plants and the source of the low-temperature heat and circulating coolant temperatures in heat supply systems. The results obratined can be used in the desing of heat pump cooling systems.

The world energetic crisis forces the look for new alternative energy sources. Such sources can be clear, non-traditional energy resources, like: solar, wind, bio and geothermal. Our object of research in this article concerns the geothermal energy resources. Geothermal energy provides a huge, reliable, renewable resource, unaffected by changing weather conditions. It reduces reliance on fossil fuels and their inherent price unpredictability and when managed with sensitivity to the site capacity, it is sustainable. Geothermal energy is relatively environmentally friendly. The use of conventional polluting fuels such as oil and coal can be reduced if geothermal and other alternative energy forms be used (reducing pollution). Georgia is rich by geothermal resources, but tuday they are not usedeffectively. One of the ways of effecctive use of geothermal water resourrces suggested by us is their use in refrigeratingequipment of fruit and vegetable store-houses. Besides, the scheme is already developed for using geothermal water for drying and cooling cereals in grain- elevators. For cooling atmospheric air the special air-cooling units aredeveloped. 

The causes of ecological damage arising from burning organic fuel in the World are analyzed in the article. One of the perspective ways for reducing such ecological damage is considered by the authors the using of non-traditional, renewable energy resources for receiving heat and electric power.

The trial heat pump system for complex heat and cold supply is described and thermodynamic parameters of its working are given. The efficiency of working of system is characterized by high coefficient of complex eff,rciency that indicates on advantage ofsimultaneous generation ofheat and cold

Prospects for the use of energy-saving complex systems of geothermal heat - and cold supply for different sectors of a national economy of Imereti region are offered and developed. It is shown, that in the long term the thermal potential of geothermal waters of Imereti region can be used for a heat supply of agriculture objects, industrial enterprises and settlements.

Nowadays in industry and enterprises of agricultural products processing rldusty low temperature (≈l00"C) heat processes for heat energy supply are mainly used less economy boilers or fire fumaces where expensive organic liquid and gas firel is used. rlrterori choosing new, economically more effective methods of getting heat energy is the essential scientihc and technical probleri for development of the country energetics.'Besides,-market economy mill present severer demands to afoiesaid branches of economy in future' The main demands will be: to inculcate new technologies raising quality ofproduction, reduce losses and cost price, long-term storage ofproducts and so on' But realization of everything aforesaid will be impossible without artificial cold i.e. without using refrigerating engineering

The need to tackle the threat of energy "hunger" in a timely manner has put on the agenda the use of geothermal water for household and economic purposes, for the arrangement of greenhouses in agriculture and for the heating of other technological processes. The share of geothermal energy in the fuel-energy balance for 2014 was 1.5%. The use of thermal waters will increase significantly in the run

In the report the potential qspeets ofnonconventional, renewed non-standard power resources of the resort-recreational area of the Black Sea coast development of Georgia, and in partieular the site of Batumi-Anaklia, is currently estimated

Possible scales of use of a wind power in Georgia are analyzed. Depending on speed of wind and itsduration, it is possible to allocate five zones of territories in Georgia. Specific power capacities and speciJic annual developments of the electric power are defined. Technical and economic indicators of primary obiecti oJ'a wind-driven power station are obtained and scales af use of wind energt for 15-20 years with possible devilopment of the electric pwer of 5-7 billion rcBm in a year are estimated.

An estimation of ecological effectveness of heat-pumpinstallations usage in the Georgian agrarian industry in carried out. It is shown that us resulf of the heat-pumpinstallation usagefor the heat-cold supply of agrarian factories, the essential positive ecological effect is achieved. 

The automatizion control system, ensuring regulation of air temperature in the stove of the tea processing technological equipment, regulation and control of tea humidity in the process if is drying as well as stabilization of the regime of the energetic equipment of the pump is considered. Problems of some unit's reservation in the system of higt-powered heat pumps are considered. The automatic devise flowchart is given. The operation principles are described.

The results of technical and economic investigations of the complex heat-cold provision systems working on the basis of the heat pumping plants (HPP) are given in the paper. Generalized characteristics for the development and design of heat pumping systems of heat-and cold provision are given in the article. 

In the work are given the results of the technical-economical analysis geothermal heat supply using heat pumps and boiler houses in the peaking operation. The expectancy of the introduction of the developed project, giving a considerable fuel economy with the simultaneous improvement of the ecological state of the environment, is substantiated

The heater system of an one-storeyed building with an independent source on the base heat pumps with bring is offered. The optimal allocation of loads between heat pumps and bring in each case is calculating.

Doctoral Thesis Referee

Master Theses Supervisor

Doctoral Thesis Supervisor/Co-supervisor

Scientific editor of monographs in foreign languages

Scientific editor of a monograph in Georgian

Editor-in-Chief of a peer-reviewed or professional journal / proceedings

Review of a scientific professional journal / proceedings

Member of the editorial board of a peer-reviewed scientific or professional journal / proceedings

Participation in a project / grant funded by an international organization

Participation in a project / grant funded from the state budget

Patent authorship

Membership of the Georgian National Academy of Science or Georgian Academy of Agricultural Sciences

Membership of an international professional organization

Membership of the Conference Organizing / Program Committee

National Award / Sectoral Award, Order, Medal, etc.

Honorary title

Monograph

Handbook

Research articles in high impact factor and local Scientific Journals

Publication in Scientific Conference Proceedings Indexed in Web of Science and Scopus