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

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.

Download Full-text

IMPROVING THE EFFICIENCY OF SHIP POWER PLANTS

VESTNIK OF ASTRAKHAN STATE TECHNICAL UNIVERSITY SERIES MARINE ENGINEERING AND TECHNOLOGIES ◽

10.24143/2073-1574-2018-4-101-106 ◽

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.

Download Full-text

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

Ventilation, Illumination and Heat Gas Supply ◽

10.32347/2409-2606.2020.34.57-62 ◽

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.

Download Full-text

The use of heat transformers for the low-temperature secondary energy resources recovery in non-ferrous metallurgy enterprises

E3S Web of Conferences ◽

10.1051/e3sconf/202017801017 ◽

2020 ◽

Vol 178 ◽

pp. 01017

Author(s):

A. Sh. Alimgazin ◽

S. A. Prishchepova ◽

I. A. Sultanguzin ◽

A. V. Fedyukhin ◽

Yu. V. Yavorovsky ◽

...

Keyword(s):

Ferrous Metallurgy ◽

Waste Heat ◽

Energy Resources ◽

Feed Water ◽

Low Grade ◽

Energy Effect ◽

Secondary Energy ◽

Nickel Production ◽

Heat Pump Unit ◽

Secondary Energy Resources

The paper discusses the concept of developing schemes for the utilization of low potential secondary energy resources waste heat in heat transformers (HT). There ara several examples of using HT in non-ferrous metallurgy plants in Russia and Kazakhstan: the production of nickel, zinc and ferroalloys. In the case of nickel production, two schemes are proposed for consideration: for summer and winter modes. The main object of study is a nickel production scheme using a lithium bromide absorption chiller (AbCh) in the summer. The nickel production process needs cold. In the proposed scheme, the main source of utilized low-grade waste heat for AbCh is recycled water. The basic parameters were calculated under various extreme conditions, the energy effect of the circuit modernization was estimated, and equipment was selected. Another example of the HT use is the use of a heat pump unit (HPU) in the production of zinc and ferroalloys. HPU is designed to heat feed water before chemical water treatment and at the same time to “cool down” the circulating water, which is then used for electrolysis, replacing purchased artesian water.

Download Full-text

Utilizing the Secondary Energy Resources Available in Coal Mines

Vestnik MEI ◽

10.24160/1993-6982-2018-5-24-33 ◽

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

Download Full-text

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

International scientific journal Internauka ◽

10.25313/2520-2057-2020-17-6418 ◽

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.

Download Full-text

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

International scientific journal Internauka ◽

10.25313/2520-2057-2020-16-6387 ◽

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.

Download Full-text