Economical efficiency of using a diesel-powered electric plant combined with an air heat pump

Abstract

BACKGROUND: In settlements located in areas that do not have centralized electric and gas supply, the problems of energy supply are solved using low-power power plants based on heat engines. One of the main drawbacks of such units is the issue of fuel economy, given the cost of its delivery. In this paper, one of the ways to increase the efficiency of energy supply during the heating season in a cold climate is considered.

AIMS: Increasing the economical efficiency of a diesel-powered electric plant with an air heat pump in conditions of low ambient teperature.

METHODS: Simulation of operation conditions was performed in the MathCad software using the experimental data obtained at the department.

RESULTS: Heating of outside air before entering the evaporator of the heat pump makes it possible to significantly increase the conversion coefficient and thus expand the boundaries of application of air-source heat pumps in cold climates.

CONCLUSIONS:

1. The combined operation of the diesel power plant with the air heat pump makes it possible to provide a single settlement with electricity as well as to supply it with thermal energy for the needs of heating and hot water supply.
2. With the diesel engine efficiency equal to 37%, the unit efficiency with the heat pump increases to 57% at an ambient temperature of 15°C (288 K).
3. The use of air heating at the inlet to the heat pump evaporator increases the fuel use rate by 12–14% due to the heat of engine and oil cooling.

Keywords

diesel engine / air heat pump / cold climate

References

[1] Air source heat pumps. Publishing Center “Aqua-Therm” [internet] Accessed: 15.12.2022. Available from: https://aqua-therm.ru/articles/articles_218.html

[2] Воздушные тепловые насосы. Издательский Центр «Аква-Терм». Дата обращения: 15.12.2022. Режим доступа: https://aqua-therm.ru/articles/articles_218.html

[3] Suslov AV. On the demand, performance and payback of air heat pumps in Russia. Refrigeration technology. 2009;98(12):8–13. (in Russ.) doi: 10.17816/RF97713

[4] Суслов А.В. О востребованности, работоспособности и окупаемости воздушных тепловых насосов в условиях России // Холодильная техника. 2009. Т. 98, № 12. С. 8–13. doi: 10.17816/RF97713

[5] Filippov SP, Ionov MS, Dilman MD. Prospects for the use of air heat pumps for heat supply of residential buildings in various climatic conditions. Teploenergetika. 2012;11:11–18. (in Russ.)

[6] Филиппов С.П., Ионов М.С., Дильман М.Д. Перспективы применения воздушных тепловых насосов для теплоснабжения жилых зданий в различных климатических условиях // Теплоэнергетика. 2012. № 11. С. 11–18.

[7] Khowailed G, Sikes K, Abdelaziz O. Preliminary Market Assessment for Cold Climate Heat Pumps. Oak Ridge: ORNL; 2011. Report No.: ORNL/TM-2011/422. Accessed: 15.12.2022. Available from: https://info.ornl.gov/sites/publications/files/Pub32941.pdf

[8] Khowailed G., Sikes K., Abdelaziz O. Preliminary Market Assessment for Cold Climate Heat Pumps. Oak Ridge: ORNL, 2011. Report No.: ORNL/TM-2011/422. Дата обращения: 15.12.2022. Режим доступа: https://info.ornl.gov/sites/publications/files/Pub32941.pdf

[9] Shen B, Abdelaziz O, Rice K, et al. Pham, in Cold Climate Heat Pumps Using Tandem Compressor. In: Conference Paper in 2016 ASHRAE Winter Conference, Orlando. U.S. Department of Energy Office of Scientific and Technical Information; 2016. Accessed: 15.12.2022. Available from: https://www.osti.gov/biblio/1235826

[10] Shen B., Abdelaziz O., Rice K., et al. Pham, in Cold Climate Heat Pumps Using Tandem Compressor // Conference Paper in 2016 ASHRAE Winter Conference, Orlando. U.S. Department of Energy Office of Scientific and Technical Information, 2016. Дата обращения: 15.12.2022. Режим доступа: https://www.osti.gov/biblio/1235826

[11] Shen B, Abdelaziz O, Baxter V, et al. Cold Climate Heat Pump Using Tandem Vapor-Injection Compressors. In: Johansson D., Bagge H., Wahlström Å. (eds) Cold Climate HVAC 2018. CCC 2018. Springer Proceedings in Energy. Cham: Springer, 2019:429–439. doi: 10.1007/978-3-030-00662-4_36

[12] Shen B., Abdelaziz O., Baxter V., et al. Cold Climate Heat Pump Using Tandem Vapor-Injection Compressors // Johansson D., Bagge H., Wahlström Å. (eds) Cold Climate HVAC 2018. CCC 2018. Springer Proceedings in Energy. Cham: Springer, 2019. P. 429–439. doi: 10.1007/978-3-030-00662-4_36

[13] Heoa J, Jeonga MW, Kim Y. Effects of flash tank vapor injection on the heating performance of an inverter-driven heat pump for cold regions. Int. J. Refrigeration. 2010;33:848–855. doi: 10.1016/j.ijrefrig.2009.12.021

[14] Heoa J., Jeonga M.W., Kim Y. Effects of flash tank vapor injection on the heating performance of an inverter-driven heat pump for cold regions // Int. J. Refrigeration. 2010. Vol. 33. P. 848–855. doi: 10.1016/j.ijrefrig.2009.12.021

[15] Patent RUS 140197 / 10.05.2014. Byul. № 13. Antipov YuA, Shatalov IK, Sobennikov EV. Mnogostupenchataya teplonasosnaya ustanovka. (in Russ.) Accessed: 15.12.2022. Available from: https://new.fips.ru/iiss/document.xhtml?faces-redirect=true&id=833c31aa580e3130d8a091064ecc62bb

[16] Патент РФ 140197 / 10.05.2014. Бюл. № 13. Антипов Ю.А., Шаталов И.К., Собенников Е.В. Многоступенчатая теплонасосная установка. Дата обращения: 15.12.2022. Режим доступа: https://new.fips.ru/iiss/document.xhtml?faces-redirect=true&id=833c31aa580e3130d8a091064ecc62bb

[17] Patent RUS 2705696 / 02.08.2018 Byul. № 22. Antipov YuA, Shatalov IK, Silin AV, et al. Mnogostupenchataya teplonasosnaya ustanovka. (in Russ.) Accessed: 15.12.2022. Available from: https://new.fips.ru/iiss/document.xhtml?faces-redirect=true&id=3592e7ffc4b2e93b8919a0f2bc8e5102

[18] Патент РФ 2705696 / 02.08.2018 Бюл. № 22. Антипов Ю.А., Шаталов И.К., Силин А.В., и др. Многоступенчатая теплонасосная установка. Дата обращения: 15.12.2022. Режим доступа: https://new.fips.ru/iiss/document.xhtml?faces-redirect=true&id=3592e7ffc4b2e93b8919a0f2bc8e5102

[19] Shatalov IK, Antipov YuA. Utilization of secondary energy resources of heat engines using heat pumps. Moscow: RUDN; 2015. (in Russ.)

[20] Шаталов И.К., Антипов Ю.А. Утилизация вторичных энергоресурсов тепловых двигателей с использованием тепловых насосов. М.: РУДН, 2015.

[21] Shatalov IK. Heat pump installations driven by heat engines: Textbook. Moscow: RUDN; 2009. (in Russ.)

[22] Шаталов И.К. Теплонасосные установки с приводом от тепловых двигателей: Учебное пособие. М.: РУДН, 2009.

[23] Kosoi A.S., Antipov Y.A., Shkarin K.V., et al. A multistage heat pump unit model for reducing energy consumption of space heating at low ambient temperatures // IOP Conf. Ser.: Mater. Sci. Eng. 2021. Vol. 1100. P. 012045. doi: 10.1088/1757-899X/1100/1/012045

RIGHTS & PERMISSIONS

Eco-Vector