Approximate Mathematical Model of an Absorption Heat Pump with Steam Heating for Integration in the Steam Turbine Thermal Scheme
DOI:
https://doi.org/10.15407/scine20.01.035Keywords:
energy saving, absorption heat pump, thermal scheme, heat supply, cogenerationAbstract
Introduction. The results of theoretical and experimental studies presented in the literature have shown that CHPPs have a signifi cant potential for energy savings when operating on a heat load by improving thermal schemes and operating characteristics. Solving the problem of improving the power plant turbine generator thermal scheme by implementing an absorption heat pump (AHP) improves the effi ciency of the use of fuel and energy resources in the heat and electricity production.
Problem Statement. An analysis of literary sources has shown that in recent years, more and more attention has been paid to utilizing secondary sources of powerful power units operating in cogeneration mode with a signifi cant supply of thermal energy to consumers. The presence of waste non-utilizable heat leads to a decrease in the effi ciency of the use of initial fuel resources. This negatively aff ects the cost of heat and electricity and has a negative impact on the environment.
Purpose. The purpose of this research is to develop a fairly simple approximate mathematical model of AHP with steam heating (conversion coeffi cient μ = 1.71), which is based on the real thermal transformers characteristics and is applicable in solving problems of its integration and to study the level of changes in the material fl ows of a powerful steam turbine with an integrated AHP with steam heating during a heating season.
Material and Methods. A simple approximation mathematical model based on the real characteristics of thermotransformer has been proposed to determine the AHP characteristics. It can be used to solve the problems of its integration into the thermal schemes of CHPP cogeneration units. The considered algorithm serves as a basis for creating software modules for determining the characteristics of AHP.
Results. An approximate mathematical model of AHP with steam heating for solving the problems of integrating a heat pump in the cogeneration plant thermal schemes on the basis of the interpolation dependences of pump characteristics and conservation equations has been proposed and designed.
Conclusions. The proposed approximation mathematical model of AHP makes it possible to evaluate the performance of a cogeneration plant for heating season when AHP of the corresponding thermal power is integrated into the thermal scheme of steam turbine under a signifi cant heat supply load.
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Romanyuk, V. N., Muslina, D. B., Bobich, A. A., Kolomitskaya, N. A., Bubir, T. V., Malkov, S. V. (2013). Absorption heat pumps in the heat circuit of a thermal power plant to increase its energy effi ciency. Energy and management, 1, 4—19 [in Russian].
Cers, A., Turlajs, D., Zeltinsh, N. (2013). Recovery of the waste heat by large capacity heat pumps for Riga city district heating system. Modern science: research, ideas, results, technologies, 2(13), 38—43.
LLC TD EST Shuangliang Eco-Energy 2022. Absorption heat pumps. URL: https://est-rus.ru/oborudovanie/teplovie-nasosy (Last accessed: 10.03.2023).
Tongfang Artifi cial Environment Co Ltd 2016. Absorption heat pump/water chilling unit energy-saving reconstruction project of Cangzhou Huarun Thermal Power Plant. URL: http://en.thholding.com.cn/2016-08/03/c_54899.htm (Last ac c essed: 10.03.2023).
Deng, T., Controls, J., Zhimeng, L., Yin, P. (2019). Waste-heat Recovery from Power Plant for District Heating. Heat Transfer, 26(8), 39—41. https://doi.org/10.1016/j.applthermaleng.2011.11.007.
Xu, Z. Y., Mao, H. C., Liu , D. S., Wan g, R. Z. (20 18). Waste heat recovery of power plant with large scale serial absorption heat pumps. Energy, 165(part B), 1097—1105. https://doi.org/10.1016/j.energy.2018.10.052.
Zhang, L., Zhang, Y., Zhou, L., E, Z., Wang, K., Wang, Z., Li, G., Qu, B. (2018). Research of waste heat energy effi ciency for absorption heat pump recycling thermal power plant circulating water. IOP Conf. Series: Earth and Environmental Science, 121, 042005. https://doi.org/10.1088/1755-1315/121/4/042005.
Wang, J., Liu, W., Liu, G., Sun, W., Li, G., Qiu, B. (2020). Theoretical Design and Analysis of the Waste Heat Recovery System of Turbine Exhaust Steam Using an Absorption Heat Pump for Heating Supply. Energies, 13, 6256. https://doi. org/10.3390/en13236256.
Yavorovsky, Yu. V., Bartenev, A. I., Sultanguzin, I. A., Alimgazin, A. Sh., Prishchepova, S. A., Kalyakin, I. D. (2020). Improving Energy and Environmental Effi ciency of Combined Heat-and Power Plant Based on Absorption Heat Transformers. E3S Web of Conferences, 178, 01010. https://doi.org/10.1051/e3sconf/202017801010.
Xu, Z. Y., Gao, J. T., Mao, H. C., Liu, D. S., Wang, R. Z. (2020). Double-section absorption heat pump for the deep recovery of low-grade waste heat. Energy Conversion and Management, 113072. https://doi.org/10.1016/j.enconman.2020.113072.
Wang, Z., Shen, H., Gu, Q., Wen, D., Liu, G., Gao, W., Ren, J. (2021). Economic Analysis of Heat Pump Recovery System for Circulating Water Waste Heat in Power Plant. International Conference on Power System and Energy Internet (PoSEI2021), 256, 02011(2021). https://doi.org/10.1051/e3sconf/202125602011.
Chirkin, N. B., Kuznetsov, M. A., Sherstov, E. V., Stennikov, V. N. (2014). The potential and technical rationality of using heat pump technologies in the combined production of electrical and thermal energy. Problems of Mechanical Engineering, 176(1), 11—20.
Shubenko, A. L., Babak, N. Yu., Senetskyi, A. V. (2019). Evaluation of the feasibility of integrating an absorption heat pump into the technological scheme of a condensing turbine. Mater. inter. sci.-tech. conf. “Physical and technical problems of energy and the ways of their 2019” (19 March 2019, Kharkiv), 30—31.
Redko, A., Redko, I., Pavlovskiy, S., Burda, Yu., Pivnenko, Y., Alforov, S. (2020). Application of an absorption heat pump in the conditions of an existing combined heat and power plant Ventilation, lighting and heat and gas supply, 34, 57—62. https://doi.org/10.32347/2409-2606.2020.34.57-62.
Broad absorption heat pump: offi cial site. Corporations BROAD. 2022. URL: http://www/.en.broad.com/Storage/ Largedownloads/enydfdrb.pdf (Last accessed: 23.03.2023).
Absorption lithium bromide heat pumps TEPLOSIBMASH. LLC SKB Teplosibmash: offi cial site. 2022. URL: http:// www.teplosibmash.ru/catalog/id/7/ (Last accessed: 23.03.2023).
Arseniev, V. M., Meleychuk, S. S. (2018) Heat pumps: the foundations of theory and development: a guidebook. Sumi.
Press William H., Teukolsky Saul A., Vetterling William T., Flannery Brian P. (1992) Numerical Recipes in Fortran 77 The Art of Scientifi c Computing. Second Edition Volume 1 of Fortran Numerical Recipes. Cambridge University Press.
Lykhvar, N. V., Govorushchenko, Yu. N., Yakovlev, V. A. (2003). Modeling of thermal power plants using interactive circu it graphics. Problems of Mechanical Engineering, 1, 30—41.
Sokolov, E. Ya. (2001) Heat supply and heat networks: Textbook for universities. Moscow.
RD 34.30.711 1975 Typical regulatory characteristic of the turbine unit PT-60-130-13 LMZ. Specialized Center for Scientifi c and Technical Information ORGRES, Moscow, Russia.
Shubenko, A., Babak, M., Senetskyi, O., Sarapin, V., Forkun, Ya. (2023). Turboexpander unit use for effi ciency increase of gas compressor station. International Conference on Advanced Mechanical and Pover Engineering (CAMPE-21) (18—21 October 2021), 8. https://doi.org/10.1007/978-3-031-18487-1_4.
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