New multi-energy sources coupling a low-temperature sustainable central heating system with a multifunctional relay energy station
Vol 6, Issue 2, 2023
VIEWS - 542 (Abstract) 426 (PDF)
Abstract
Due to the short cost-effective heat transportation distance, the existing geothermal heating technologies cannot be used to develop deep hydrothermal-type geothermal fields situated far away from urban areas. To solve the problem, a new multi-energy source coupling a low-temperature sustainable central heating system with a multifunctional relay energy station is put forward. As for the proposed central heating system, a compression heat pump integrated with a heat exchanger in the heating substation and a gas-fired water/lithium bromide single-effect absorption heat pump in the multifunctional relay energy station are used to lower the return temperature of the primary network step by step. The proposed central heating system is analyzed using thermodynamics and economics, and matching relationships between the design temperature of the return water and the main line length of the primary network are discussed. The studied results indicate that, as for the proposed central heating system, the cost-effective main line length of the primary network can approach 33.8 km, and the optimal design return temperature of the primary network is 23 ℃. Besides, the annual coefficient of performance and annual energy efficiency of the proposed central heating system are about 3.01 and 42.7%, respectively.
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1. Gjoka K, Rismanchi B, Crawford RH. Fifth-generation district heating and cooling systems: A review of recent advancements and implementation barriers. Renewable and Sustainable Energy Reviews 2023; 171: 112997. doi: 10.1016/j.rser.2022.112997
2. Sorknæs P, Nielsen S, Lund H, et al. The benefits of 4th generation district heating and energy efficient datacenters. Energy 2022; 260: 125215. doi: 10.1016/j.energy.2022.125215
3. Wang G, Liu Y, Zhu X, Zhang W. The status and development trend of geothermal resources in China. Earth Science Frontiers 2020; 27(1): 1–9. doi: 10.13745/j.esf.2020.1.1
4. Molar-Cruz A, Keim MF, Schifflechner C, et al. Techno-economic optimization of large-scale deep geothermal district heating systems with long-distance heat transport. Energy Conversion and Management 2022; 267: 115906. doi: 10.1016/j.enconman.2022.115906
5. Limberger J, Boxem T, Pluymaekers M, et al. Geothermal energy in deep aquifers: A global assessment of the resource base for direct heat utilization. Renewable and Sustainable Energy Reviews 2018; 82(Part 1): 961–975. doi: 10.1016/j.rser.2017.09.084
6. Bai J, Jia W, Liu L. Research on the application and development potential of middle and deep geothermal heating technology in Beijing heating market. Heating Ventilating & Air Conditioning 2017; 47: 43–47.
7. Building Energy Research Center of Tsinghua University. Annual Report of China Building Energy Conservation 2023 (Chinese). Architecture and Building Press; 2023. pp.267–278.
8. Sun F, Hao B, Fu L, et al. New medium-low temperature hydrothermal geothermal district heating system based on distributed electric compression heat pumps and a centralized absorption heat transformer. Energy 2021; 232: 120974. doi: 10.1016/j.energy.2021.120974
9. Sun F, Zhao X, Chen X, et al. New configurations of district heating system based on natural gas and deep geothermal energy for higher energy efficiency in northern China. Applied Thermal Engineering 2019; 151: 439–450. doi: 10.1016/j.applthermaleng.2019.02.043
10. Li Y, Pan W, Xia J, Jiang Y. Combined heat and water system for long-distance heat transportation. Energy 2019; 172: 401–408. doi: 10.1016/j.energy.2019.01.139
11. Fu L, Li Y, Wu Y, et al. Low carbon district heating in China in 2025—A district heating mode with low grade waste heat as heat source. Energy 2021; 230: 120765. doi: 10.1016/j.energy.2021.120765
12. Li Y, Xia J, Su Y, Jiang Y. Systematic optimization for the utilization of low-temperature industrial excess heat for district heating. Energy 2018; 144: 984–991. doi: 10.1016/j.energy.2017.12.048
13. Xie X, Jiang Y. Absorption heat exchangers for long-distance heat transportation. Energy 2017; 141: 2242–2250. doi: 10.1016/j.energy.2017.11.145
14. Mirl N, Schmid F, Spindler K. Reduction of the return temperature in district heating systems with an ammonia-water absorption heat pump. Case Studies in Thermal Engineering 2018; 12: 817–822. doi: 10.1016/j.csite.2018.10.010
15. Sun F, Chen X, Fu L, Zhang S. Configuration optimization of an enhanced ejector heat exchanger based on an ejector refrigerator and a plate heat exchanger. Energy 2018; 164: 408–417. doi: 10.1016/j.energy.2018.08.194
16. Sun F, Hao B, Fu L, et al. New medium-low temperature hydrothermal geothermal district heating system based on distributed electric compression heat pumps and a centralized absorption heat transformer. Energy 2021; 232: 120974. doi: 10.1016/j.energy.2021.120974
17. Sommer T, Sotnikov A, Sulzer M, et al. Hydrothermal challenges in low-temperature networks with distributed heat pumps. Energy 2022; 257: 124527. doi: 10.1016/j.energy.2022.124527
18. Schlosser F, Jesper M, Vogelsang J, et al. Large-scale heat pumps: Applications, performance, economic feasibility and industrial integration. Renewable and Sustainable Energy Reviews 2020; 133: 110219. doi: 10.1016/j.rser.2020.110219
19. Osterman E, Stritih U. Review on compression heat pump systems with thermal energy storage for heating and cooling of buildings. Journal of Energy Storage 2021; 39: 102569. doi: 10.1016/j.est.2021.102569
20. Herold KE, Radermacher R, Klein SA. Absorption Chillers and Heat Pumps, 2nd ed. CRC press; 2016. pp. 173–177.
21. Lu D, Chen G, Gong M, et al. Thermodynamic and economic analysis of a gas-fired absorption heat pump for district heating with cascade recovery of flue gas waste heat. Energy Conversion and Management 2019; 185: 87–100. doi: 10.1016/j.enconman.2019.01.110
22. Dong J, Sha S, Li X, et al. Ownership unbundling of natural gas transmission networks in China. Journal of Cleaner Production 2018; 195: 145–153. doi: 10.1016/j.jclepro.2018.05.173
23. Chen P, Kedan Ji. Analysis on heat transfer performance of large-scale plate heat exchanger in Taigu relay energy station (Chinese). District Heating 2019; 77–81. doi: 10.16641/j.cnki.cn11-3241/tk.2019.01.012
24. Browne MW, Bansal PK. An elemental NTU-ε model for vapour-compression liquid chillers. International Journal of Refrigeration 2001; 24: 612–627. doi: 10.1016/S0140-7007(00)00091-8
25. Sun J, Fu L, Zhang S, Hou W. A mathematical model with experiments of single effect absorption heat pump using LiBr-H2O. Applied Thermal Engineering 2010; 30(17–18): 2753–2762. doi: 10.1016/j.applthermaleng.2010.07.032
26. Wu Z, You S, Zhang H, et al. Performance analysis and optimization for a novel air-source gas-fired absorption heat pump. Energy Conversion and Management 2020; 223: 113423. doi: 10.1016/j.enconman.2020.113423
27. Ciampi G, Rosato A, Sibilio S. Thermo-economic sensitivity analysis by dynamic simulations of a small Italian solar district heating system with a seasonal borehole thermal energy storage. Energy 2018; 143: 757–771. doi: 10.1016/j.energy.2017.11.029
28. Liu J, Li Q, Wang F, Zhou L. A new model of screw compressor for refrigeration system simulation. International Journal of Refrigeration 2012; 35(4): 861–870. doi: 10.1016/j.ijrefrig.2012.01.016
29. Yu FW, Chan KT. Improved energy performance of air cooled centrifugal chillers with variable chilled water flow. Energy Conversion and Management 2008; 49(6): 1595–1611. doi: 10.1016/j.enconman.2007.12.009
30. Dorotic H, Puksec T, Duic N. Multi-objective optimization of district heating and cooling systems for a one-year time horizon. Energy 2019; 169: 319–328. doi: 10.1016/j.energy.2018.11.149
31. Gonzalez-Salazar MA, Kirsten T, Prchlik L. Review of the operational flexibility and emissions of gas- and coal-fired power plants in a future with growing renewables. Renewable and Sustainable Energy Reviews 2018; 82, Part 1: 1497–1513. doi: 10.1016/j.rser.2017.05.278
32. Ministry of Housing and Urban-Rural Development of the People’s Republic of China (MOHURD). Industry Standard of The People’s Republic Of China: Design Code For City Heating Network (CJJ 34-2010) (Chinese). China’s Architecture and Building Press; 2010.
33. Ahamed JU, Saidur R, Masjuki HH. A review on exergy analysis of vapor compression refrigeration system. Renewable and Sustainable Energy Reviews 2011; 15: 1593–1600. doi: 10.1016/j.rser.2010.11.039
34. Standing committee of the National People’s Congress. Resource Tax Law of the People’s Republic of China, 2022 (Chinese). Available online: http://jdjc.mof.gov.cn/fgzd/202201/t20220106_3781190.htm (accessed on 27 July 2023).
35. Standard fixed institute of Ministry of Housing and Urban-Rural Development of the People’s Republic of China. Indicators of Investment in Public Works Estimates (Chinese). China’s Planning Press; 2007.
36. People’s Government of Beijing Municipality. Implementation Opinions on Further Accelerating the Application of Clean District Heating Integrated with Heat Pump (Chinese). People’s Government of Beijing Municipality; 2019.
DOI: https://doi.org/10.24294/tse.v6i2.2188
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