Increasing the efficiency of the thermal power units at zoning of heat load curve
The article deals with the work of heat and power units of thermal power plants in the conditions of disaggregation of the heat load schedule. The purpose of the work is to increase the efficiency of operation of CHP units operating under the conditions of the zoned temperature schedule. To achieve...
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| Format: | Article |
| Language: | English |
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Kazan State Power Engineering University
2019-12-01
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| Series: | Известия высших учебных заведений: Проблемы энергетики |
| Subjects: | |
| Online Access: | https://www.energyret.ru/jour/article/view/1079 |
| _version_ | 1797705259701764096 |
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| author | D. S. Sinelnikov P. A. Shchinnikov |
| author_facet | D. S. Sinelnikov P. A. Shchinnikov |
| author_sort | D. S. Sinelnikov |
| collection | DOAJ |
| description | The article deals with the work of heat and power units of thermal power plants in the conditions of disaggregation of the heat load schedule. The purpose of the work is to increase the efficiency of operation of CHP units operating under the conditions of the zoned temperature schedule. To achieve the obtained results, mathematical modeling based on the methods of differential-exergetic and thermodynamic analysis; methods of material, energy and exergetic balances. Research has shown that in order to increase the efficiency the original method of splitting the temperature graph into three zones can be used, each of which is characterized by the method of regulation of heat supply, and to assess the effect of the minimum fuel consumption criterion can be used. The method of determining the equivalent design temperature, which takes into account the regime peculiarities of heat and power units in the form of a method of regulation of heat supply, is developed. Study has shown that three design points should be available when zoning the temperature schedule. Based on optimization calculations for standard sizes of heat and power units of a wide range of capacities, the calculations show that the optimal parameters of heat and power units in the conditions of zoning of the temperature schedule as a whole correspond to the standard values. In addition, it is shown that in each zone of the temperature schedule there is a saving of fuel, which can be from 3 to 30% depending on the type of power unit, its capacity and zone of the temperature schedule, and the annual fuel consumption of the heat and power units can be reduced by approximately 10%. It is shown that when conventional power units operate according to the zoned temperature schedule and in the first zone (quantitative regulation), preference should be given to power units with steam production. In the second zone (mixed regulation), the operation of power units with steam extraction and heat and power units is equivalent. In addition, in the third zone (qualitative regulation) preference should accrue to heat and power units. |
| first_indexed | 2024-03-12T05:34:29Z |
| format | Article |
| id | doaj.art-730485a044e9470dba06f987c3f689c4 |
| institution | Directory Open Access Journal |
| issn | 1998-9903 |
| language | English |
| last_indexed | 2024-03-12T05:34:29Z |
| publishDate | 2019-12-01 |
| publisher | Kazan State Power Engineering University |
| record_format | Article |
| series | Известия высших учебных заведений: Проблемы энергетики |
| spelling | doaj.art-730485a044e9470dba06f987c3f689c42023-09-03T06:32:58ZengKazan State Power Engineering UniversityИзвестия высших учебных заведений: Проблемы энергетики1998-99032019-12-01214121910.30724/1998-9903-2019-21-4-12-19600Increasing the efficiency of the thermal power units at zoning of heat load curveD. S. Sinelnikov0P. A. Shchinnikov1Novosibirsk State Technical UniversityNovosibirsk State Technical UniversityThe article deals with the work of heat and power units of thermal power plants in the conditions of disaggregation of the heat load schedule. The purpose of the work is to increase the efficiency of operation of CHP units operating under the conditions of the zoned temperature schedule. To achieve the obtained results, mathematical modeling based on the methods of differential-exergetic and thermodynamic analysis; methods of material, energy and exergetic balances. Research has shown that in order to increase the efficiency the original method of splitting the temperature graph into three zones can be used, each of which is characterized by the method of regulation of heat supply, and to assess the effect of the minimum fuel consumption criterion can be used. The method of determining the equivalent design temperature, which takes into account the regime peculiarities of heat and power units in the form of a method of regulation of heat supply, is developed. Study has shown that three design points should be available when zoning the temperature schedule. Based on optimization calculations for standard sizes of heat and power units of a wide range of capacities, the calculations show that the optimal parameters of heat and power units in the conditions of zoning of the temperature schedule as a whole correspond to the standard values. In addition, it is shown that in each zone of the temperature schedule there is a saving of fuel, which can be from 3 to 30% depending on the type of power unit, its capacity and zone of the temperature schedule, and the annual fuel consumption of the heat and power units can be reduced by approximately 10%. It is shown that when conventional power units operate according to the zoned temperature schedule and in the first zone (quantitative regulation), preference should be given to power units with steam production. In the second zone (mixed regulation), the operation of power units with steam extraction and heat and power units is equivalent. In addition, in the third zone (qualitative regulation) preference should accrue to heat and power units.https://www.energyret.ru/jour/article/view/1079heat load curveoptimization of parametersefficiencyheatingsavingexergetic methodanalysiscombined systemthermal power plantsdistributed generation |
| spellingShingle | D. S. Sinelnikov P. A. Shchinnikov Increasing the efficiency of the thermal power units at zoning of heat load curve Известия высших учебных заведений: Проблемы энергетики heat load curve optimization of parameters efficiency heating saving exergetic method analysis combined system thermal power plants distributed generation |
| title | Increasing the efficiency of the thermal power units at zoning of heat load curve |
| title_full | Increasing the efficiency of the thermal power units at zoning of heat load curve |
| title_fullStr | Increasing the efficiency of the thermal power units at zoning of heat load curve |
| title_full_unstemmed | Increasing the efficiency of the thermal power units at zoning of heat load curve |
| title_short | Increasing the efficiency of the thermal power units at zoning of heat load curve |
| title_sort | increasing the efficiency of the thermal power units at zoning of heat load curve |
| topic | heat load curve optimization of parameters efficiency heating saving exergetic method analysis combined system thermal power plants distributed generation |
| url | https://www.energyret.ru/jour/article/view/1079 |
| work_keys_str_mv | AT dssinelnikov increasingtheefficiencyofthethermalpowerunitsatzoningofheatloadcurve AT pashchinnikov increasingtheefficiencyofthethermalpowerunitsatzoningofheatloadcurve |