期刊
JOURNAL OF ENERGY STORAGE
卷 42, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.est.2021.103011
关键词
Seasonal energy storage; Solar district heating; Heat Pump control; Energy Efficiency; Life Cycle Costing
资金
- Spanish government [RTI2018-093849-BC31, RTI2018-093849-B-C33]
- Catalan Government [GREiA - 2017 SGR 1537, AGACAPE -2017 SGR 1409]
- ICREA
- Ministerio de Ciencia, Innovacion y Universidades - Agencia Estatal de Investigacion (AEI) [RED2018-102431-T]
- European Union [713679]
- Universitat Rovira i Virgili (URV)
The study evaluated the techno-economic benefits of different control strategies for a heat pump integrated into a solar assisted district heating system. The system was optimized using a genetic algorithm and applied to a residential neighborhood in Madrid. Results showed significant impact of heat pump control on techno-economic benefits and improved seasonal storage efficiency up to 90%.
This present work focuses on assessing the techno-economic benefits of different control strategies for a heat pump integrated into the solar assisted district heating system (SDHS). The system has been developed using dynamic simulation software (TRNSYS) and optimized based on a genetic algorithm. With an industrial-sized heat pump connected to thermal storage tanks for domestic hot water (DHW) and space heating (SH) for the requirements of the community, a SDHS is operated by applying two different control mechanisms for the heat pump based on its reference operating temperature. The application of the methodology is applied to a residential neighborhood community of 10 buildings located in Madrid to act as a proxy for the Mediterranean climates. The results showed a significant effect for the heat pump control in the techno-economic benefits where the proposed system is able to provide a solar fraction up to 99%. Furthermore, the total electricity consumption of the heating system varied by 10% between the best and the worst cases. Besides, the annual seasonal storage efficiency improved up to 90% with a life cycle expense up to 67.12 Euro/MWh, and a payback period of 29 years.
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