scholarly journals Application of an absorption heat pump in the conditions of an existing combined heat and power plant

2020 ◽  
Vol 34 ◽  
pp. 57-62
Author(s):  
A. Redko ◽  
I. Redko ◽  
S. Pavlovskiy ◽  
Y. Burda ◽  
Y. Pivnenko ◽  
...  
Keyword(s):  
Energy Balance ◽  
Thermal Energy ◽  
Power Plants ◽  
Renewable Energy Sources ◽  
Combined Heat And Power ◽  
Energy Resources ◽  
Secondary Energy ◽  
Condense Water ◽  
Secondary Energy Resources ◽  
Heating Networks

The dependence of mankind on energy resources only increases with the development of scientific and technological progress. It is clear that the supply of natural energy resources will run out soon. The solution is using new energy generation technologies based on renewable and secondary sources. Due to the presence in Ukraine of operating combined heat and power plants, there is the possibility of producing thermal energy using the secondary heat by absorption heat pumps. At the same time, the thermal energy of flue gases and steam from steam turbines does not heat the atmosphere, but are involved in the generation of thermal energy for heating networks of settlements. Due to the ability of the absorbent solution to absorb and condense water vapor under the influence of low-potential and high-potential heat carriers, it is possible to significantly reduce the consumption of traditional energy resources and increase the overall efficiency of the combined heat and power plants. World experience shows that the use of secondary energy resources can significantly improve the country's energy balance. And the main problem is the availability of these resources. In today's changing climate, the use of renewable energy sources requires additional expences and it is appropriate to pay attention to use of present secondary energy resources, which are not used now. There are a lot of such resources available in heat generating facilities. This is especially noticeable in large cities with central heating networks. Therefore, increasing the efficiency of their work makes it possible to significantly improve the energy balance of the whole country and reduce tariffs for thermal energy for industry and individual consumers, which, in turn, will improve the living standards of citizens.

MODELING AN EFFECTIVE SOLUTION FOR THE UTILIZATION OF SECONDARY ENERGY RESOURCES OF CCGT UNIT ON THE EXAMPLE OF CCGT-420T CHPP-16

2020 ◽  
Vol 13 (3) ◽  
pp. 10-15
Author(s):  
Yuriy Antipov ◽  
Ivan Shatalov ◽  
Kirill Shkarin ◽  
Georgiy Polischuk ◽  
Igor Danilov ◽  
...  
Keyword(s):  
Power Plants ◽  
Cooling Tower ◽  
Combined Cycle ◽  
Energy Resources ◽  
Auxiliary Equipment ◽  
Secondary Energy ◽  
Modelling Method ◽  
Exhaust Heat ◽  
Heat Pump Unit ◽  
Secondary Energy Resources

Nowadays, improving the efficiency of power plants by utilizing secondary energy resources is gaining more attention in the energy sector. In this paper, the combined cycle gas turbine (CCGT-420T) was considered, where exhaust heat from the main and auxiliary equipment is utilized, and sent to a water supply system through a closed-circuit heat exchanger, as a result, the heat transferred (Q = 6.4 MW) is rejected into the environment through a cooling tower. Moreover, an effective modelling method for utilizing heat in a closed cycle, using a steam compressing heat pump unit (HPU) is proposed. In addition, a calculation of the effectiveness of utilizing secondary energy resources depending on the number of HPU stages.

scholarly journals IMPROVING THE EFFICIENCY OF SHIP POWER PLANTS

2018 ◽  
pp. 101-106
Author(s):  
Alexey Valerievich Soloviev ◽  
Margarita Makarovna Chirkova ◽  
Nikolay Frolovich Popov
Keyword(s):  
Power Efficiency ◽  
Heat Recovery ◽  
Power Plants ◽  
Tap Water ◽  
Cooling Water ◽  
Energy Resources ◽  
Automated System ◽  
Automated Control ◽  
Secondary Energy ◽  
Secondary Energy Resources

The foreground task of the development of inland water transport in the Russian Federation is increasing security, environmental protection and power efficiency of shipping operations. The article provides an overview of methods to improve the efficiency of marine power plants. The sources of secondary heat are considered and it is found that the most promising heat recovery sources for river vessels are the exhaust gases of diesel engines and cooling water of the main engines and diesel generators. The analysis shows that the secondary energy resources on ships, including modern ones, are practically not used or are used insufficiently and, in addition, the environment is being damaged. The reasons for the insufficient use of secondary energy resources on ships have been found, among them the lack of automated control systems for integrated heat recovery systems, which leads to a decrease of its economic efficiency. The integrated heat recovery systems are regarded by the operatives with distrust due to the increasing number of the repaired systems and bad quality of tap water. Deep heat recovery systems are good for sea-going ships, but are of little use in the river transport because of weaker secondary heat flows and poor fuel saving at the relatively high fuel cost. Today the important problem is to develop principles and algorithms of functioning of automated system of control over integrated heat recovery systems.

scholarly journals Modeling an effective method to utilize secondary energy resources of a combined cycle gas turbine based on the CCGT-420T

2020 ◽  
Vol 21 (1) ◽  
pp. 27-35
Author(s):  
Yuri A. Antipov ◽  
Ivan K. Shatalov ◽  
Kirill V. Shkarin ◽  
Anna S. Barybina ◽  
Yana A. Ogneva ◽  
...  
Keyword(s):  
Gas Turbine ◽  
Power Plants ◽  
Economic Benefits ◽  
Combined Cycle ◽  
Energy Resources ◽  
Coefficient Of Performance ◽  
Secondary Energy ◽  
Exhaust Heat ◽  
Heat Pump Unit ◽  
Secondary Energy Resources

Nowadays, improving the efficiency of power plants by utilizing secondary energy resources is gaining more attention in the energy sector. In this paper, the combined cycle gas turbine (CCGT-420T) was considered, where exhaust heat from the main and auxiliary equipment is utilized, and sent to a water supply system through a closed-circuit heat exchanger, as a result, the heat transferred ( Q 6.4 MW) is rejected into the environment through a cooling tower. Moreover, an effective modelling method for utilizing heat in a closed cycle, using a steam compressing heat pump unit (HPU) is proposed. In addition, a calculation of the effectiveness of utilizing secondary energy resources depending on the number of HPU stages. In addition, the calculation of the effectiveness of the use of secondary energy resources depending on the number of stages of HPU was carried out. Several options of the model were discussed in this work, such as, two-, three-, and four-stage HPU and the coefficient of performance was calculated. Moreover, the work of these compressors for each option of the model was discussed in this work. Finally, the economic benefits of using of a multi-stage HPU instead of a traditional one-stage HPU during the annual operation of the CCGT-420T was discussed.

scholarly journals Carbon Dioxide Turbine Expander Plant Producing Liquid and Gaseous Carbon Dioxide

2019 ◽  
Vol 62 (1) ◽  
pp. 77-87 ◽  
Author(s):  
A. V. Ovsyannik
Keyword(s):  
Carbon Dioxide ◽  
Thermal Energy ◽  
Boiling Point ◽  
Storage Systems ◽  
Energy Resources ◽  
Heating Unit ◽  
Secondary Energy ◽  
Gaseous Carbon Dioxide ◽  
And Storage ◽  
Secondary Energy Resources

The scheme of carbon dioxide cogeneration and trigeneration plant with the use of secondary energy resources in the form of combustion products or flue gases that enables to produce electricity, thermal energy and cold for centralized and decentralized supply of consumers simultaneously, is presented. In addition, the plant can produce liquid and gaseous carbon dioxide. The main elements of the plant are a heating unit, a turbodetander unit and a carbon dioxide unit for the production of cold, liquid and gaseous carbon dioxide. A thermodynamic calculation and a brief exergy analysis of the plant were carried out. In the proposed plant, off-gases from glassmelting, metallurgical furnaces, heat power facility and other energy facilities with a secondary energy temperature of 250–400 °C and above can be used as secondary energy resources. The heating unit of the installation has been designed to produce thermal energy for heating and hot water supply systems. The carbon dioxide unit has been designed for the production of cold, electric energy and carbon dioxide in liquid and gaseous form in order to ensure the operation of the plant and the use for commercial purposes. The cold in the plant can be obtained in two evaporators operating at different boiling temperatures. At a higher boiling point of carbon dioxide, cold is used in air conditioning systems and in centralized cooling and storage systems, while at a lower boiling point of carbon dioxide – in freezing and storage systems. For the implementation of the reverse carbon dioxide cycle, a three-stage carbon dioxide compressor with a receiver after the third stage is used. To reduce compression performance of the compressor, complete intermediate cooling of carbon dioxide between stages should be provided.

Utilizing the Secondary Energy Resources Available in Coal Mines

Vestnik MEI ◽  
2018 ◽  
Vol 5 (5) ◽  
pp. 24-33
Author(s):  
Aleksey В. Biryukov ◽  
◽  
Dmitriy I. Parkhomenko ◽  
Viktor V. Varakuta ◽  
Pavel А. Gnitiev ◽  
...  
Keyword(s):  
Coal Mines ◽  
Energy Resources ◽  
Secondary Energy ◽  
Secondary Energy Resources

DYNAMICS OF CHANGES IN THE STRUCTURE AND VOLUMES OF FORMATION OF SECONDARY ENERGY RESOURCES IN THE ENERGY OF UKRAINE

2017 ◽  
Author(s):  
Nataliia Fialko ◽  
◽  
Viktor Prokopov ◽  
Nataliia Meranova ◽  
Nina Polozenko ◽  
...  
Keyword(s):  
Energy Sector ◽  
Energy Resources ◽  
Secondary Energy ◽  
Secondary Energy Resources

The paper presents the dynamics of changes in volumes of secondary energy resources (SER) in the energy sector of Ukraine by type of energy. The data on changes in the structure and volumes of secondary energy resources for the last period are presented.

ANALYSIS OF THE USE LEVEL OF SECONDARY ENERGY RESOURCES IN ENERGY SECTOR OF UKRAINE

2017 ◽  
Author(s):  
Nataliia Fialko ◽  
◽  
Viktor Prokopov ◽  
Julii Sherenkovskii ◽  
Artem Yevtushenko ◽  
...  
Keyword(s):  
Energy Sector ◽  
High Potential ◽  
Energy Resources ◽  
Secondary Energy ◽  
Secondary Energy Resources

The features of the use of heat and combustible and heat secondary energy resources (SER) in the energy sector of Ukraine are considered. The data on the use levels of various types of combustible SER, as well as high-potential heat SER by types of utilization plants are presented.

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