scholarly journals DEVELOPMENT OF A MODEL OF THE CITY HEAT SUPPLY SYSTEM IN THE CONDITIONS OF ALTERNATIVE ENERGY FLOWS

2021 ◽  
Vol 2 (1) ◽  
pp. 24-31
Author(s):  
O.B. Maksymova ◽  
D.S. Minchev
Keyword(s):  
Heat Supply ◽  
Alternative Energy ◽  
Heat Supply System ◽  
Supply System ◽  
Energy Flows ◽  
The City

scholarly journals Data Envelopment Analysis in Performance Assessment of Fuel and Energy Complex Enterprises

2020 ◽  
Vol 2020 (2) ◽  
pp. 251-262
Author(s):  
Mariia Pokushko ◽  
Alena Stupina ◽  
Inmaculada Medina-Bulo ◽  
Egor Dresvianskii
Keyword(s):  
Data Envelopment Analysis ◽  
Performance Assessment ◽  
Heat Supply ◽  
Power Plants ◽  
Heat Supply System ◽  
Supply System ◽  
Data Envelopment ◽  
Advantages And Disadvantages ◽  
Dea Method ◽  
The City

The authors applied the Data Envelopment Analysis (DEA) to assess the performance of the heat supply system in the city of Krasnoyarsk. The article provides a detailed description of the DEA method, its positive sides and shortcomings. The research included a comparative analysis of performance assessment methods in terms of advantages and disadvantages. The DEA method proved the most convenient tool for measuring the production efficiency of an object. The authors modified the architecture of the universal decision support system into a DEA-based one. The DEA method also proved highly efficient in assessing the performance of the heat supply system in the city of Krasnoyarsk. The analysis made it possible to develop recommendations to improve the efficiency of the local heat supply system using the case of thirteen unites, e.g. boilers, heat and power plants, etc. The input indicator was represented by the available heat capacity. Heat output to the grid and emission mass were used as output indicators. Based on the available initial data, the authors constructed an output-oriented model for analyzing the functioning environment with one input and two outputs. They identified inefficient units of the Krasnoyarsk heat supply system and proposed optimization of input and output values for each unit to improve the functioning of the heat supply system as a whole. The developed for the upgrading of boilers and heat and power plants had an efficiency index in the range up to 1.

scholarly journals The development of the district heat supply system of the city of Karaganda

2019 ◽  
Vol 135 ◽  
pp. 01031
Author(s):  
Mereke Agilbayeva ◽  
Alexey Kalinin
Keyword(s):  
Heat Supply ◽  
District Heating ◽  
Heat Supply System ◽  
Heating System ◽  
Supply System ◽  
The State ◽  
District Heating System ◽  
Pipeline Networks ◽  
The City ◽  
Heat Loads

The district heating system of Karaganda (Kazakhstan) is considered in the article. The characteristics of the existing cogenerators and the state of the pipeline networks are given. Given the analysis of the existing state of the entire district heating of Karaganda. Proposed the program for the integrated development of the heat supply system bringing world experience in implementing the main development and modernization of heating networks. Shown the experience of reconstruction of heat supply facilities in the city of Karaganda within the framework of the state loan program “Nurly Zhol”. Based on the statistical data on the development of the city of Karaganda and its heat supply system the predicted heat loads are given until 2030. Due to the shortage of available heat capacity, options for the development of a centralized heat supply system in Karaganda are given and analyzed.

scholarly journals RANGE OF EXHAUST GASES PRE-COOLING IN THE IMPROVED HEAT PUMP SYSTEM OF HEAT SUPPLY

2021 ◽  
pp. 139-147
Author(s):  
V.D. Petrash ◽  
◽  
Yu.N. Polunin ◽  
N.V. Danichenko ◽  
◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Heat Pump ◽  
Heat Supply ◽  
Initial Temperature ◽  
Heat Supply System ◽  
Supply System ◽  
Hot Water ◽  
Exhaust Gases ◽  
Energy Flows ◽  
Rotary Kilns

The paper studies the range of possible and rational pre-cooling of exhaust gases in an improved heat pump of heating supply system in the development of its previously proposed basic version. The research has established analytical dependences for determining the energy flows of the condenser and evaporator, as well as the energy efficiency of the improved heat supply system. On their basis, a rational range of preliminary cooling of exhaust gases of rotary kilns was revealed, the upper level of which is determined, first of all, by their initial temperature. It has been established that the rational ratio of water consumption for heating systems with traditional temperature drops and hot water supply is in the range of 0.3-0.9. At the same time, an increase in energy efficiency is noted in the process of operational regulation of systems with a decrease in the ratio of the costs of heat carriers for technological and household purposes. The degree of precooling of exhaust gases, which significantly depends on their initial temperature, is in the range of 0.35-0.5 with a decrease in the corresponding flow rates of heat carriers in heating and hot water supply systems. The rational ratio of the consumption of the heating and heated medium in the process of contact interaction, which significantly depends on the initial temperature of the exhaust gases, is in the range of 0.2-1.2. For low-temperature waste gases (up to 500С), the reciprocal values of the analyzed ratio logically agree with the corresponding values of the irrigation coefficient. The results of the analytical study established multifactorial dependences of energy flows in the condenser and evaporator, as well as determining the energy efficiency of an improved heat pump of the heat supply system, on the basis of which the general range of possible pre-cooling of exhaust gases from rotary kilns was revealed.

scholarly journals The Efficiency of Vapor Compression Transformation of Energy Flows for Heat Supply Based on the Sea Water

2021 ◽  
Vol 64 (6) ◽  
pp. 538-558
Author(s):  
V. D. Petrash ◽  
V. O. Makarov ◽  
A. A. Khomenko
Keyword(s):  
Heat Pump ◽  
Heat Supply ◽  
Sea Water ◽  
Heat Supply System ◽  
Water Area ◽  
Supply System ◽  
The Black Sea ◽  
Outdoor Temperature ◽  
External Energy ◽  
Energy Flows

The results of the analytical study substantiated the operating conditions for the highly efficient use of the temperature potential of seawater in heat pump heating systems (HPHS) for buildings a building with correspondingly improved environmental indicators. Based on the analysis of the regional conditions of the Odessa water area of the Black Sea, the initial parameters have been substantiated and rational modes of operation of an improved HPHS with central, decentralized or local heating of the subscriber energy carrier have been determined. As indicators for evaluating the efficiency of the HPHS operation, the conversion factor of energy flows and the specific consumption of external energy for the drive of the compressor and the circulating pump of cooled water in the operation of heat pump units were considered. For seawater in the Odessa water area of the Black Sea during the entire heating period, the following temperatures were considered as initial data for analysis: water at the inlet to the evaporator (5–10) ° C, at the outlet (1 °C); calculated temperature difference of the coolant in the heating system (50–40) °C, indoor air (20 °C); estimated outdoor temperature (–18 °C). The characteristic correspondence between the flow rates of the cooled sea water and the heated energy carrier of the heat supply system was taken into account. The prerequisites of high efficiency of the heat pump heat supply system in which the actual conversion coefficient exceeds the seasonal normalized calculated and minimum value at an outdoor temperature of (–10) °C under the limiting conditions of the monoenergy regime for both new and reconstructed buildings were substantiated. In the course of the study, it has been determined that the total specific consumption of external energy for the compressor drive and the circulation of cooled water in the operation of a heat pump unit with a characteristic ratio of water equivalents, even under the limiting conditions of the monoenergetic mode of operation of the heat supply system at an outdoor temperature of (–10) °C, are within the range of generally accepted values (w = 0.28–0.34).

Investigations and designing of a geothermal heat supply system

2010 ◽  
Vol 57 (4) ◽  
pp. 341-346 ◽  
Author(s):  
V. A. Butuzov ◽  
G. V. Tomarov ◽  
E. V. Bryantseva ◽  
V. V. Butuzov
Keyword(s):  
Heat Supply ◽  
Heat Supply System ◽  
Supply System ◽  
Geothermal Heat

scholarly journals STUDYING HUMAN PARTICIPATION IN MICROCLIMATE MANAGEMENT

ASJ. ◽  
2020 ◽  
Vol 1 (42) ◽  
pp. 42-47
Author(s):  
M. Koroli ◽  
F. Khashimova
Keyword(s):  
Heat Supply ◽  
Mutual Influence ◽  
Heat Supply System ◽  
Supply System ◽  
Sociological Research

In the work on the analysis of sociological research, an author attempts to reveal the mutual influence that exists between the heat supply system and the consumer.

Sign in / Sign up

Export Citation Format

Share Document