Exergo-economic assessment and sensitivity analysis of a solar-driven combined cooling, heating and power system with organic Rankine cycle and absorption heat pump
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A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
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Date
2021-09-01
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en
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17
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Energy, Volume 230
Abstract
District energy systems based on renewable resources help to reduce greenhouse-gas emissions and fossil-fuel use. Here, a multi-generation energy system combining cooling, heating, and power is realized by employing organic Rankine cycle (ORC) and absorption heat pump (AHP) technologies, which enable cascading the utilization of solar heat. The AHP can operate steadily providing cooling, heating and hot water from solar thermal and geothermal sources. A modelling approach presented to evaluate the energy, exergy, economic, and exergo-economic performance of the above system. The results show that the AHP could reach a coefficient of performance (COP) between 1.38 and 2.37 depending on the mode of operation. The yearly energy and exergy efficiency of the tri-generation system is 56.5% and 9.6%, respectively. Compared to a separate system, the simple economic payback time of the tri-generation system is 3.5 years. The specific exergo-economic cost of electricity produced is 0.12 $/kWh, whereas the cost of hot water is much higher, or 0.31 $/kWh. The sensitivity analysis performed shows that the inlet and outlet temperatures of the AHP together with the yearly solar irradiance have the highest impact on the performance. This study provides a new direction on cost-effective utilization of renewable sources in district energy systems.Description
Funding Information: This research has been supported by National Natural Science Foundation of China (Grant No. 51736006 ) and Fundamental Research Funds for the Central Universities . Publisher Copyright: © 2021 Elsevier Ltd Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords
Absorption heat pump, Combined cooling, Exergo-economic analysis, Heating and power, Multi-generation, Parabolic trough collectors, Sensitivity analysis
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Chen, Y, Xu, J, Zhao, D, Wang, J & Lund, P D 2021, ' Exergo-economic assessment and sensitivity analysis of a solar-driven combined cooling, heating and power system with organic Rankine cycle and absorption heat pump ', Energy, vol. 230, 120717 . https://doi.org/10.1016/j.energy.2021.120717