1. 华中科技大学能源与动力工程学院 2. 华中科技大学中欧清洁与可再生能源学院 3. China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China 4. China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China; PROMES-CNRS Laboratory, 7 rue du Four Solaire, 66120 Font-Romeu-Odeillo-via, France
Effects of critical geometric parameters on the optical performance of a conical cavity receiver
Hu XIAO1, Yanping ZHANG2(), Cong YOU3, Chongzhe ZOU1, Quentin FALCOZ4
1. School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China 2. School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan 430074, China; China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China 3. China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China 4. China-EU Institute for Clean and Renewable Energy, Huazhong University of Science and Technology, Wuhan 430074, China; PROMES-CNRS Laboratory, 7 rue du Four Solaire, 66120 Font-Romeu-Odeillo-via, France
The optical performance of a receiver has a great influence on the efficiency and stability of a solar thermal power system. Most of the literature focuses on the optical performance of receivers with different geometric shapes, but less research is conducted on the effects of critical geometric parameters. In this paper, the commercial software TracePro was used to investigate the effects of some factors on a conical cavity receiver, such as the conical angle, the number of loops of the helical tube, and the distance between the focal point of the collector and the aperture. These factors affect the optical efficiency, the maximum heat flux density, and the light distribution in the conical cavity. The optical performance of the conical receiver was studied and analyzed using the Monte Carlo ray tracing method. To make a reliable simulation, the helical tube was attached to the inner wall of the cavity in the proposed model. The results showed that the amount of light rays reaching the helical tube increases with the increasing of the conical angle, while the optical efficiency decreases and the maximum heat flux density increases. The increase in the number of loops contributed to an increase in the optical efficiency and a uniform light distribution. The conical cavity receiver had an optimal optical performance when the focal point of the collector was near the aperture.
T Tsoutsos, V Gekas, K Marketaki. Technical and economical evaluation of solar thermal power generation. Renewable Energy, 2003, 28(6): 873–886 https://doi.org/10.1016/S0960-1481(02)00152-0
2
W Huang, F Huang, P Hu, Z Chen. Prediction and optimization of the performance of parabolic solar dish concentrator with sphere receiver using analytical function. Renewable Energy, 2013, 53(9): 18–26 https://doi.org/10.1016/j.renene.2012.10.046
3
R Flesch, H Stadler, R Uhlig, R Pitz-Paal. Numerical analysis of the influence of inclination angle and wind on the heat losses of cavity receivers for solar thermal power towers. Solar Energy, 2014, 110(110): 427–437 https://doi.org/10.1016/j.solener.2014.09.045
4
L Xiao, S Y Wu, Y R Li. Numerical study on combined free-forced convection heat loss of solar cavity receiver under wind environments. International Journal of Thermal Sciences, 2012, 60(1): 182–194 https://doi.org/10.1016/j.ijthermalsci.2012.05.008
5
S Y Wu, F H Guo, L Xiao. Numerical investigation on combined natural convection and radiation heat losses in one side open cylindrical cavity with constant heat flux. International Journal of Heat and Mass Transfer, 2014, 71(3): 573–584 https://doi.org/10.1016/j.ijheatmasstransfer.2013.12.064
6
S Y Wu, L Xiao, Y R Li. Effect of aperture position and size on natural convection heat loss of a solar heat-pipe receiver. Applied Thermal Engineering, 2011, 31(14–15): 2787–2796 https://doi.org/10.1016/j.applthermaleng.2011.05.004
7
F Cui, Y He, Z Cheng, Y Li. Study on combined heat loss of a dish receiver with quartz glass cover. Applied Energy, 2013, 112(4): 690–696 https://doi.org/10.1016/j.apenergy.2013.01.007
8
K S Reddy, T S Vikram, G Veershetty. Combined heat loss analysis of solar parabolic dish- modified cavity receiver for superheated steam generation. Solar Energy, 2015, 121: 78–93 https://doi.org/10.1016/j.solener.2015.04.028
9
T S Vikram, K S Reddy. Estimation of heat losses from modified cavity mono-tube boiler receiver of solar parabolic dish for steam generation. Energy Procedia, 2014, 57: 371–380 https://doi.org/10.1016/j.egypro.2014.10.190
H Li, W Huang, F Huang, P Hu, Z Chen. Optical analysis and optimization of parabolic dish solar concentrator with a cavity receiver. Solar Energy, 2013, 92(4): 288–297 https://doi.org/10.1016/j.solener.2013.03.011
12
W T Xie, Y J Dai, R Z Wang. Numerical and experimental analysis of a point focus solar collector using high concentration imaging PMMA Fresnel lens. Energy Conversion and Management, 2011, 52(6): 2417–2426 https://doi.org/10.1016/j.enconman.2010.12.048
13
X Li, Y J Dai, R Z Wang. Performance investigation on solar thermal conversion of a conical cavity receiver employing a beam-down solar tower concentrator. Solar Energy, 2015, 114: 134–151 https://doi.org/10.1016/j.solener.2015.01.033
14
A M Daabo, S Mahmoud, R K Al-Dadah. The optical efficiency of three different geometries of a small scale cavity receiver for concentrated solar applications. Applied Energy, 2016, 179: 1081–1096 https://doi.org/10.1016/j.apenergy.2016.07.064
15
A M Daabo, A Ahmad, S Mahmoud, R K Al-Dadah. Parametric analysis of small scale cavity receiver with optimum shape for solar powered closed Brayton cycle applications. Applied Thermal Engineering, 2017, 122: 626–641 https://doi.org/10.1016/j.applthermaleng.2017.03.093
16
S Li, G Xu, X Luo, Y Quan, Y Ge. Optical performance of a solar dish concentrator/receiver system: influence of geometrical and surface properties of cavity receiver. Energy, 2016, 113: 95–107 https://doi.org/10.1016/j.energy.2016.06.143
17
F Wang, R Lin, B Liu, H Tan, Y Shuai. Optical efficiency analysis of cylindrical cavity receiver with bottom surface convex. Solar Energy, 2013, 90(4): 195–204 https://doi.org/10.1016/j.solener.2013.01.017
E Przenzak, M Szubel, M Filipowicz. The numerical model of the high temperature receiver for concentrated solar radiation. Energy Conversion and Management, 2016, 125: 97–106 https://doi.org/10.1016/j.enconman.2016.07.036
20
C E Andraka, J Yellowhair, B D Iverson. A parametric study of the impact of various error contributions on the flux distribution of a solar dish concentrator. In: ASME 2010 4th International Conference on Energy Sustainability, Phoenix, AZ, USA, 2010, 2: 565–580
21
C Zou, Y Zhang, H Feng, Q Falcoz, P Neveu, W Gao, C Zhang. Effects of geometric parameters on thermal performance for a cylindrical solar receiver using a 3D numerical model. Energy Conversion and Management, 2017, 149: 293–302 https://doi.org/10.1016/j.enconman.2017.06.088
22
C Zou, Y Zhang, Q Falcoz, P Neveu, C Zhang, W Shu, S Huang. Design and optimization of a high-temperature cavity receiver for a solar energy cascade utilization system. Renewable Energy, 2017, 103: 478–489 https://doi.org/10.1016/j.renene.2016.11.044
M Prakash, S B Kedare, J K Nayak. Determination of stagnation and convective zones in a solar cavity receiver. International Journal of Thermal Sciences, 2010, 49(4): 680–691 https://doi.org/10.1016/j.ijthermalsci.2009.06.015
25
J Wang, S Yang, C Jiang, Q Yan, P D Lund. A novel 2-stage dish concentrator with improved optical performance for concentrating solar power plants. Renewable Energy, 2017, 108: 92–97 https://doi.org/10.1016/j.renene.2017.02.059
26
Y Zhu, J Shi, Y Li, L Wang, Q Huang, G Xu. Design and thermal performances of a scalable linear Fresnel reflector solar system. Energy Conversion and Management, 2017, 146: 174–181 https://doi.org/10.1016/j.enconman.2017.05.031
27
J Sarwar, G Georgakis, K Kouloulias, K E Kakosimos. Experimental and numerical investigation of the aperture size effect on the efficient solar energy harvesting for solar thermochemical applications. Energy Conversion and Management, 2015, 92: 331–341 https://doi.org/10.1016/j.enconman.2014.12.065
28
H Chang, C Duan, K Wen, Y Liu, C Xiang, Z Wan, S He, C Jing, S Shu. Modeling study on the thermal performance of a modified cavity receiver with glass window and secondary reflector. Energy Conversion and Management, 2015, 106: 1362–1369 https://doi.org/10.1016/j.enconman.2015.10.043
29
D Jafrancesco, P Sansoni, F Francini, D Fontani. Strategy and criteria to optically design a solar concentration plant. Renewable & Sustainable Energy Reviews, 2016, 60: 1066–1073 https://doi.org/10.1016/j.rser.2016.02.005
30
H Hasuike, Y Yoshizawa, A Suzuki, Y Tamaura. Study on design of molten salt solar receivers for beam-down solar concentrator. Solar Energy, 2006, 80(10): 1255–1262 https://doi.org/10.1016/j.solener.2006.03.002
