Evaluation of the efficiency of heat pumps for heating using cycle’s method

Keywords: heat pump, the cycle method, coefficient of performance, exergetic efficiency, thermodynamic efficiency

Abstract

The exclusion zone of Chernobyl allows for the placement of significant wind and solar power plants. These facilities appear localized in relation to the grid, despite the fact that there are
network infrastructure and high-voltage power lines needed for transmission of electricity to the national network. However, the use of renewables often raises questions about the impact on the reliability of the grid. This applies to the balance of power consumption, the stability of dynamic processes in power systems, frequency control capabilities, and so on. In these processes, the determining factor is sensitive to current changes in capacity and scope of irregular changes of power generation. A close assessment of "strength" of the network is performed from these factors. The sensitivity to voltage changes of power in the node connecting RES has also been taken into account.

Combining the different sources of energy used to ensure the stability of generation. Determining the optimal configuration of complex local power system requires mathematical modeling. A common method is a simulation, which allows us to predict various possible combinations of data, using indicators such as average values (mathematical expectations), dispersion, allowable rate of change, distribution of probability. This approach takes into account statistics from different time averaging - monthly, daily, current (fixed intervals of a few minutes). Fundamentally important in this presentation is an opportunity to highlight the estimated component in the changing behavior of RES capacity. Timely forecasting and planning (for the current day and a day ahead) of renewable energy allow us to optimize the structure of a combined power and to achieve economically satisfactory results, as well the implementation of environmental requirements and the needs to ensure reliable operation of the network. Multi-objective optimization is preferred because the presence of diverse requirements, and offered mathematical modeling of the complex power system is an efficient way to achieve the goal.

References

1. Moroziuk T.V. Refrigeration machines and heat pumps theory. — Odessa: Negotsiant, 2006.— 712 s. (in rus.)
2. Brodyansky V.M., Fratsher V., Michalek K. Exergy method and its application. - Moscow: Energoatomisdat. - 1988. - 288s. (in rus.)
3. Szargut J. Component efficiencies of a vapourcompression heat pump // Exergy. – 2002. – №2. – p.99-104.
4. Kalnin I.M., Fadekov K.N., Evaluation of the efficiency of thermodynamic cycles of vapor-compression refrigerating machines and heat pumps // Kholodilnaya Tekhnika. – 2006. – №3. – с.16-25. (in rus.)
5. Szargut J. Partical efficiencies of the vapourcompression refrigerator // Chlodnictwo. – 1997. – №6. – p.10-12. (in Polish)
6. Andryushchenko A.I. Fundamentals of thermodynamics cycles of thermal power plants. - M .: Higher School. - 1985. - 319 p. (in rus.)
7. Chillers. N. Koshkin, I Sakun, E Bambushek etc. - Leningrad:. Energoizdat. - 1985. – 510 p. (in rus.)
8. Martynovsky V. Analysis of real thermodynamic cycles. - Energy. M., 1972. - 216 p. (in rus.)
9. Baer G. Engineering Thermodynamics. - Moscow: Mir, 1977. - 518s.
10. Szargut Jan. Technical thermodynamics // Wydawnictwo Naukove. – Warszawa, 1991. – 543p. (in Polish)
11. Yantovsky E., Pustovalov Y. Vapor compression heat pumps. - M .: Energoizdat, 1982. - 144 p. (in rus.)
12. Cool Pack – a collection of simulation tools for refrigeration. Turtorial version 1.46 [Electronic resource] / A. Jakobsen,B. Dindler Rasmussen, M. Skovrup, S. Andersen. – Electron. text. data.-Department of Energy Engineering Technical University of Denmark, 2001.-20p.– Mode of access: www.url:
http://chillers.ru/download/programms/CoolPackTutorial.pdf. - Last access: 2016. – Title from the screen.
13. Kharlampidi D. The use of a systematic approach in the choice of the technological scheme of the heat pump installation // Integrated technologies and energy efficiency. - 2008. - №1. - p.16-24. (in rus.)
14. Low exergy sytems for high-performance buildings and communities. Annex 49 Summary report ECBCS.

Abstract views: 19
PDF Downloads: 52
Published
2016-12-14
How to Cite
Kudelya, P., Solomakha, A., & Ocheretyanko, M. (2016). Evaluation of the efficiency of heat pumps for heating using cycle’s method. Vidnovluvana Energetika, (4 (47), 74-85. Retrieved from https://ve.org.ua/index.php/journal/article/view/110