ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ
Abstract. This study addresses the pressing issue of improving the energy efficiency of combined heat supply systems with two-stage heat generation and expanding vapour-compression heat generation through the utilisation of subcooling energy from spent heat carrier in the district heating network, c...
Saved in:
| Date: | 2025 |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | Ukrainian |
| Published: |
Institute of Engineering Thermophysics of NAS of Ukraine
2025
|
| Online Access: | https://ihe.nas.gov.ua/index.php/journal/article/view/652 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| Journal Title: | Thermophysics and Thermal Power Engineering |
Institution
Thermophysics and Thermal Power Engineering| _version_ | 1856543882006757377 |
|---|---|
| author | Petrash, V.D. Baryshev, V.P Shevchenko, L.G. Golubenko, A.V. |
| author_facet | Petrash, V.D. Baryshev, V.P Shevchenko, L.G. Golubenko, A.V. |
| author_sort | Petrash, V.D. |
| baseUrl_str | |
| collection | OJS |
| datestamp_date | 2026-01-01T09:32:47Z |
| description | Abstract. This study addresses the pressing issue of improving the energy efficiency of combined heat supply systems with two-stage heat generation and expanding vapour-compression heat generation through the utilisation of subcooling energy from spent heat carrier in the district heating network, cold water of general-purpose supply, and exhaust gases. The objective of this research is to advance the previously proposed combined heat supply system by integrating the low-temperature energy potential of such sources as subcooled spent heat carrier from the network, general-purpose cold water, and exhaust gases. The system's development aligns with current trends in increasing the share of vapour-compression heat generation, driven by the need to enhance overall energy efficiency. To achieve this objective, the study conducts an analytical investigation into the conditions under which the energy efficiency of the system’s structural subsystems can be improved, depending on their operational parameters and thermal conditions during different periods of the heating season. This approach makes it possible to identify the most rational modes of integrating these low-temperature sources into the heat supply system under varying shares of vapour-compression heat generation. The research methodology is based on the further development of a structural-functional diagram of the system, supported by theoretical justification. As a result of the analysis, relationships have been derived for the actual coefficient of performance (COP) and the share of thermal power generated by the heat pump subsystem relative to the total thermal output of the system. These relationships are presented as functions of the operational parameters and temperature conditions of the structural subsystems throughout the heating season. The established dependencies enable a comprehensive assessment of the conditions necessary to improve energy efficiency and increase the share of generated heat, taking into account variations in the temperatures of low-temperature sources, as well as the ratios and distribution of water flows, including cold water used for municipal and industrial purposes. Based on a generalised formula for calculating the actual COP of the heat pump unit, it has been determined that this value significantly depends on the temperature of the spent heat carrier at the outlet of the condenser, prior to its entry into the heat-generating unit. The analysis of the share of thermal power produced by the heat pump subsystem has shown that, under rational values of the intermediate temperature of the spent heat carrier and with decreasing outdoor air temperature, it is possible to significantly increase the proportion of heat generated by the heat pump subsystem. The obtained analytical results provide a foundation for the engineering design of a combined heat supply system as a component of energy-saving technologies for buildings in both municipal and industrial sectors. |
| first_indexed | 2026-02-08T08:10:17Z |
| format | Article |
| id | oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-652 |
| institution | Thermophysics and Thermal Power Engineering |
| language | Ukrainian |
| last_indexed | 2026-02-08T08:10:17Z |
| publishDate | 2025 |
| publisher | Institute of Engineering Thermophysics of NAS of Ukraine |
| record_format | ojs |
| spelling | oai:ojs2.ihenasgovua.s43.yourdomain.com.ua:article-6522026-01-01T09:32:47Z ENERGY EFFICIENCY OF COMBINED HEAT AND POWER SUPPLY IN THE CONTEXT OF INCREASING STEAM COMPRESSION HEAT GENERATION ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ Petrash, V.D. Baryshev, V.P Shevchenko, L.G. Golubenko, A.V. Abstract. This study addresses the pressing issue of improving the energy efficiency of combined heat supply systems with two-stage heat generation and expanding vapour-compression heat generation through the utilisation of subcooling energy from spent heat carrier in the district heating network, cold water of general-purpose supply, and exhaust gases. The objective of this research is to advance the previously proposed combined heat supply system by integrating the low-temperature energy potential of such sources as subcooled spent heat carrier from the network, general-purpose cold water, and exhaust gases. The system's development aligns with current trends in increasing the share of vapour-compression heat generation, driven by the need to enhance overall energy efficiency. To achieve this objective, the study conducts an analytical investigation into the conditions under which the energy efficiency of the system’s structural subsystems can be improved, depending on their operational parameters and thermal conditions during different periods of the heating season. This approach makes it possible to identify the most rational modes of integrating these low-temperature sources into the heat supply system under varying shares of vapour-compression heat generation. The research methodology is based on the further development of a structural-functional diagram of the system, supported by theoretical justification. As a result of the analysis, relationships have been derived for the actual coefficient of performance (COP) and the share of thermal power generated by the heat pump subsystem relative to the total thermal output of the system. These relationships are presented as functions of the operational parameters and temperature conditions of the structural subsystems throughout the heating season. The established dependencies enable a comprehensive assessment of the conditions necessary to improve energy efficiency and increase the share of generated heat, taking into account variations in the temperatures of low-temperature sources, as well as the ratios and distribution of water flows, including cold water used for municipal and industrial purposes. Based on a generalised formula for calculating the actual COP of the heat pump unit, it has been determined that this value significantly depends on the temperature of the spent heat carrier at the outlet of the condenser, prior to its entry into the heat-generating unit. The analysis of the share of thermal power produced by the heat pump subsystem has shown that, under rational values of the intermediate temperature of the spent heat carrier and with decreasing outdoor air temperature, it is possible to significantly increase the proportion of heat generated by the heat pump subsystem. The obtained analytical results provide a foundation for the engineering design of a combined heat supply system as a component of energy-saving technologies for buildings in both municipal and industrial sectors. Дослідження присвячене розв'язанню актуальної задачі підвищення енергетичної ефективності комбінованого теплопостачання в умовах зростання парокомпресійної генерації теплоти на основі енергії доохолодження відпрацьованого енергоносія з теплової мережі, початкової холодної води та відхідних газів. Науковим результатом дослідження стали встановлені залежності дійсного коефіцієнта перетворення та відношення генерованої теплоти в підсистемі з ТНУ до загальної потужності генерованої теплоти для теплопостачання від режимних параметрів і температурних умов структурних підсистем за тривалістю опалювального періоду. Результати дослідження запропонованої системи доповнюють основу її інженерного розроблення з урахуванням характерних умов функціонування. Institute of Engineering Thermophysics of NAS of Ukraine 2025-09-30 Article Article application/pdf https://ihe.nas.gov.ua/index.php/journal/article/view/652 10.31472/ttpe.3.2025.7 Thermophysics and Thermal Power Engineering; Vol 49 No 3 (2025): Thermophysics and Thermal Power Engineering; 72-82 Теплофизика и Теплоэнергетика; Vol 49 No 3 (2025): Thermophysics and Thermal Power Engineering; 72-82 Теплофізика та Теплоенергетика; Vol 49 No 3 (2025): Thermophysics and Thermal Power Engineering; 72-82 2663-7235 uk https://ihe.nas.gov.ua/index.php/journal/article/view/652/569 |
| spellingShingle | Petrash, V.D. Baryshev, V.P Shevchenko, L.G. Golubenko, A.V. ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ |
| title | ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ |
| title_alt | ENERGY EFFICIENCY OF COMBINED HEAT AND POWER SUPPLY IN THE CONTEXT OF INCREASING STEAM COMPRESSION HEAT GENERATION |
| title_full | ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ |
| title_fullStr | ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ |
| title_full_unstemmed | ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ |
| title_short | ЕНЕРГЕТИЧНА ЕФЕКТИВНІСТЬ КОМБІНОВАНОГО ТЕПЛОПОСТАЧАННЯ В УМОВАХ ЗРОСТАННЯ ПАРОКОМПРЕСІЙНОЇ ГЕНЕРАЦІЇ ТЕПЛОТИ |
| title_sort | енергетична ефективність комбінованого теплопостачання в умовах зростання парокомпресійної генерації теплоти |
| url | https://ihe.nas.gov.ua/index.php/journal/article/view/652 |
| work_keys_str_mv | AT petrashvd energyefficiencyofcombinedheatandpowersupplyinthecontextofincreasingsteamcompressionheatgeneration AT baryshevvp energyefficiencyofcombinedheatandpowersupplyinthecontextofincreasingsteamcompressionheatgeneration AT shevchenkolg energyefficiencyofcombinedheatandpowersupplyinthecontextofincreasingsteamcompressionheatgeneration AT golubenkoav energyefficiencyofcombinedheatandpowersupplyinthecontextofincreasingsteamcompressionheatgeneration AT petrashvd energetičnaefektivnístʹkombínovanogoteplopostačannâvumovahzrostannâparokompresíjnoígeneracííteploti AT baryshevvp energetičnaefektivnístʹkombínovanogoteplopostačannâvumovahzrostannâparokompresíjnoígeneracííteploti AT shevchenkolg energetičnaefektivnístʹkombínovanogoteplopostačannâvumovahzrostannâparokompresíjnoígeneracííteploti AT golubenkoav energetičnaefektivnístʹkombínovanogoteplopostačannâvumovahzrostannâparokompresíjnoígeneracííteploti |