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An axial type impinging receiver
KTH, School of Industrial Engineering and Management (ITM), Energy Technology.
2018 (English)In: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 162, p. 318-334Article in journal (Refereed) Published
Abstract [en]

An axial type impinging receiver has been developed for a solar dish-Brayton system. By using selective reflection cavity surfaces as a secondary concentrator, the solar irradiation is reflected and concentrated on a cylindrical absorber that is located in the center of the cavity. A modified inverse design method was applied for quickly finding possible cavity receiver designs, and a numerical conjugate heat transfer model combined with a ray-tracing model was utilized for studying the detailed performance of the impinging receivers. The ray-tracing results show that the flux distribution on the cavity and absorber surfaces can be efficiently adjusted to meet the design requirements by changing the absorber diameter, the cavity diameter, the cavity length and the offset length. A candidate receiver design was selected for detailed numerical studies, and the results show that the average outlet air temperature and the radiative-to-thermal efficiency can reach 801.1 °C and 82.8% at a DNI level of 800 W/m2. The temperature differences on the absorber can be controlled within 122.7 °C for DNI level of 800 W/m2, and 126.4 °C for DNI level of 1000 W/m2. Furthermore, the structure is much simpler than a typical radial impinging design. 

Place, publisher, year, edition, pages
Elsevier Ltd , 2018. Vol. 162, p. 318-334
Keywords [en]
Axial type, Cavity receiver, Concentrated solar power, Dish Brayton, Impinging jet, Heat transfer, Inverse problems, Numerical methods, Solar energy, Brayton, Ray tracing, air temperature, design method, equipment, inverse analysis, irradiation, model, reflectivity, solar power, solar radiation
National Category
Environmental Engineering
Identifiers
URN: urn:nbn:se:kth:diva-236604DOI: 10.1016/j.energy.2018.08.036ISI: 000447576500027Scopus ID: 2-s2.0-85053077820OAI: oai:DiVA.org:kth-236604DiVA, id: diva2:1265730
Note

Export Date: 22 October 2018; Article; CODEN: ENEYD; Correspondence Address: Wang, W.; Department of Energy Technology, KTH Royal Institute of TechnologySweden; email: wujun@kth.se; Funding details: EU-FP7; Funding details: 308952; Funding text: This work was financially supported by the European Union's 7th Framework Programme (EU-FP7) project OMSoP (Grant Agreement No. 308952 ). QC 20181126

Available from: 2018-11-26 Created: 2018-11-26 Last updated: 2018-12-07Bibliographically approved

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Wang, WujunLaumert, Björn

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