Browsing by Author "Jiang, Chuan"
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- Design and performance evaluation of a high-temperature cavity receiver for a 2-stage dish concentrator
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä(2018-11-01) Yang, Song; Wang, Jun; Lund, Peter D.; Jiang, Chuan; Huang, BingkunHere a new design of a cavity heat-pipe receiver for a 2-stage dish concentrator is proposed. Both optical and thermal simulations are used for the design and for performance evaluation of the cavity. The receiver was fitted to a conventional 2-stage and an improved (overlapped) 2-stage dish. The latter system configuration shows superior performance compared to the conventional one, in particular in terms of compact structure, uniformity of the incident flux and temperature distribution, and solar-to-thermal efficiency. The variance of the irradiation distribution at the cavity decreased by 25% and the largest adjacent temperature difference decreased by 54%. In total, the conversion efficiency increased from 61.3% to 68.6%. Moreover, the new receiver with the improved 2-stage dish concentrating system has less limits of scales (e.g. weight and volume) compared to the traditional single dish design. - High performance integrated receiver-storage system for concentrating solar power beam-down system
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä(2019-07-15) Yang, Song; Wang, Jun; Lund, Peter D.; Jiang, Chuan; Li, XiuxiuConcentrating solar power systems (CSP) with thermal storage units can provide dispatchable power. Here we propose a modified design of a cavity receiver combined with a thermocline heat storage unit for the beam-down CSP. Instead of using a separate receiver and heat storage unit, an integrated unit consisting of an extended cylindrical cavity with a packed bed storage is proposed. The new approach was designed using validated cavity radiation and quasi-1D 2-phase numerical heat transfer models. As the concentrated irradiation can be directly absorbed in such a system, the structure used can be simplified and operation of the unit is more effective. A high solar-to-exergy conversion ratio of 0.52 was reached with an optimized design, charging and discharging efficiencies being well beyond 99% and 92% at 770 °C. An important detail in the integrated receiver-storage design was the use of a circulation air flow fan, which enhanced the heat transfer inside the packed bed storage. The proposed design is promising for improving the efficiency and economics of beam down CSP. - A review of the compound parabolic concentrator (CPC) with a tubular absorber
A2 Katsausartikkeli tieteellisessä aikakauslehdessä(2020-01-01) Jiang, Chuan; Yu, Lei; Yang, Song; Li, Keke; Wang, Jun; Lund, Peter D.; Zhang, YaomingThe compound parabolic concentrator (CPC) is a highly interesting solar collector technology for different low-concentration applications due to no tracking requirement. The CPC with a tubular absorber is the most common type of CPC. Here, a comprehensive state-of-the-art review of this CPC type is presented, including design features, structure, applications, etc. Key design guidelines, structural improvements, and recent developments are also presented. - Status and future strategies for Concentrating Solar Power in China
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä(2017-04-01) Wang, Jun; Yang, Xue-Song; Jiang, Chuan; Zhang, Yaoming; Lund, Peter D.China is the world leader in several areas of clean energy, but not in Concentrating Solar Power (CSP). Our analysis provides an interesting viewpoint to China's possible role in helping with the market breakthrough of CSP. We present a short overview of the state-of-the-art of CSP including the status in China. A blueprint for China's CSP development is elaborated based on China's 13th 5-year program, but also on China's previous success factors in PV and wind power. The results of this study suggest that China could play a more prominent global role in CSP, but this would require stronger efforts in several areas ranging from innovation to policies.