轻钢屋面一体化V型孔板式空气集热器参数优化
|
摘要
设计一种太阳辐射集热和结构承载一体化轻钢屋面结构,并在其内部添加V型扰流孔板,提高光热转化率。利用实验数据,验证集热器的传热数学模型,并拟合得出集热器的流动阻力系数经验关系式;以热效率和有效效率为综合评价指标,分析内部结构对集热器性能的影响,并结合正交试验得出该集热器结构的最佳组合:孔隙率12%,孔板间距0.3 m,空气层厚度0.05 m,孔板与边框夹角60°。
Designing a light steel roof structure with structural bearing and solar energy utilization,which equipped with V-shaped perforated blocks to improve light and heat conversion rates. Using regressed experiment data,the heat transfer model of air collector was verified,and the empirical relationship of flow friction coefficient was deduced. Taking the thermal efficiency and effective efficiency as comprehensive evaluation indexes,the effect of structure on the collector performance was analyzed,and combining the orthogonal test,the optimized values was obtained for open area ratio of12%,gap of blocks of 0.3 m,thickness of air of 0.05 m,angle of attack of 60°.
Designing a light steel roof structure with structural bearing and solar energy utilization,which equipped with V-shaped perforated blocks to improve light and heat conversion rates. Using regressed experiment data,the heat transfer model of air collector was verified,and the empirical relationship of flow friction coefficient was deduced. Taking the thermal efficiency and effective efficiency as comprehensive evaluation indexes,the effect of structure on the collector performance was analyzed,and combining the orthogonal test,the optimized values was obtained for open area ratio of12%,gap of blocks of 0.3 m,thickness of air of 0.05 m,angle of attack of 60°.
引文
[1]袁董,王国栋,王子克.集热器构件化-太阳能与建筑一体化设计的必由之路[J].太阳能学报,2005,26(1):48-52.[1]Yuan Dong,Wang Guodong,Wang Zike.Solar collector components-only way of solar building integration[J].Acta Energiae Solaris Sinica,2005,26(1):48-52.
[2]季杰,罗成龙,孙炜,等.一种新型的与建筑一体化太阳能双效集热器系统的实验研究[J].太阳能学报,2011,32(2):149-153.[2]Ji Jie,Luo Chenglong,Sun Wei,et al.Experimental study on a dual functional solar collector integrated with building[J].Acta Energiae Solaris Sinica,2011,32(2):149-153.
[3]季杰,于志,孙炜,等.多种太阳能技术与建筑一体化的应用研究[J].太阳能学报,2016,37(2):489-493.[3]Ji Jie,Yu Zhi,Shun Wei,et al.Study of multiple solar technologies integrated with building[J].Acta Energiae Solaris Sinica,2016,37(2):489-493.
[4]袁颖利,李勇,代彦军,等.内插式太阳能真空管空气集热器实验研究[J].太阳能学报,2010,31(11):1429-1433.[4]Yuan YingLi,Li Yong,Dai Yanjun,et al.Study on thermal performance of evacuated tubular solar air collector with inserted tubes[J].Acta Energiae Solaris Sinica,2010,31(11):1429-1433.
[5]李宪莉,李超,张彦,等.盖板式冲缝型空气集热器参数优化[J].太阳能学报,2013,34(10):1810-1817.[5]Li Xianli,Li Chao,Zhang Yan,et al.Parameters optimization of glazed transpired collector with slit一like perforation[J].Acta Energiae Solaris,2013,34(10):1810-1817.
[6]夏佰林,赵东亮,代彦军,等.蛇形流道太阳能平板空气集热器集热性能研究[J].太阳能学报,2012,33(9):1560-1564.[6]Xia Bailin,Zhao Dongliang,Dai yanjun.Study on a flat plate solar air collector with serpentine flow passages[J].Acta Energiae Solaris Sinica,2012,33(9):1560-1564.
[7]Omojaro A P,Aldabbagh L B Y.Experimental performance of single and double pass solar air heater with fins and steel wire mesh as absorber[J].Applied Energy,2010,87(12):3759-3765.
[8]Pakdaman M F,Lashkari A,Tabrizi H B,et al.Performance evaluation of a natural-convection solar airheater with a rectangular-finned absorber plate[J].Energy Conversion and Management,2011,52(2):1215-1225.
[9]Sara O N,Pekdemir T,Yapici S,et al.Heat transfer enhancement in a channel flow with perforated rectangular blocks[J].Heat Fluid Flow,2001,22(5):509-518.
[10]Karwa R,Maheshwari B K.Heat transfer and friction in an asymmetrically heated rectangular duct with half and fully perforated baffles at different pitches[J].International Communications in Heat&Mass Transfer,2009,36(3):264-268.
[11]Chamoli S,Thakur N S.Heat transfer enhancement in solar air heater with V-shaped perforated baffles[J].Journal of Renewable and Sustainable Energy,2013,5(2):222-231.
[12]Shin S,Kwak J S.Effect of hole shape on the heat transfer in a rectangular duct with perforated blockage walls[J].Journal of Mechanical Science And Technology,2008,22(5):1945-1951.
[13]Augustus L M,Kumar S.Mathematical modeling and thermal performance analysis of unglazed transpired solar collectors[J].Solar Energy,2007,81(1):62-75.
[14]Van Decker G W E,Hollands K G T,Brunger A P.Heat-exchange relations for unglazed transpired solar collectors with circular holes on a square or triangular pitch[J].Solar Energy,2001,71(1):33-45.
[15]Cho H,Jabbari M,Goldstein R.Experimental mass(heat)transfer in and near a circular hole in a flat plate[J].Journal of Heat and Mass Transfer,1997,40(10):2431-2443.
[16]Gupta M K,Kaushik S C.Performance evaluation of solar air heater for various artificial roughness geometries based on energy,effective and exergy efficiencies[J].Renewable Energy,2009,34(3):465-476.
[2]季杰,罗成龙,孙炜,等.一种新型的与建筑一体化太阳能双效集热器系统的实验研究[J].太阳能学报,2011,32(2):149-153.[2]Ji Jie,Luo Chenglong,Sun Wei,et al.Experimental study on a dual functional solar collector integrated with building[J].Acta Energiae Solaris Sinica,2011,32(2):149-153.
[3]季杰,于志,孙炜,等.多种太阳能技术与建筑一体化的应用研究[J].太阳能学报,2016,37(2):489-493.[3]Ji Jie,Yu Zhi,Shun Wei,et al.Study of multiple solar technologies integrated with building[J].Acta Energiae Solaris Sinica,2016,37(2):489-493.
[4]袁颖利,李勇,代彦军,等.内插式太阳能真空管空气集热器实验研究[J].太阳能学报,2010,31(11):1429-1433.[4]Yuan YingLi,Li Yong,Dai Yanjun,et al.Study on thermal performance of evacuated tubular solar air collector with inserted tubes[J].Acta Energiae Solaris Sinica,2010,31(11):1429-1433.
[5]李宪莉,李超,张彦,等.盖板式冲缝型空气集热器参数优化[J].太阳能学报,2013,34(10):1810-1817.[5]Li Xianli,Li Chao,Zhang Yan,et al.Parameters optimization of glazed transpired collector with slit一like perforation[J].Acta Energiae Solaris,2013,34(10):1810-1817.
[6]夏佰林,赵东亮,代彦军,等.蛇形流道太阳能平板空气集热器集热性能研究[J].太阳能学报,2012,33(9):1560-1564.[6]Xia Bailin,Zhao Dongliang,Dai yanjun.Study on a flat plate solar air collector with serpentine flow passages[J].Acta Energiae Solaris Sinica,2012,33(9):1560-1564.
[7]Omojaro A P,Aldabbagh L B Y.Experimental performance of single and double pass solar air heater with fins and steel wire mesh as absorber[J].Applied Energy,2010,87(12):3759-3765.
[8]Pakdaman M F,Lashkari A,Tabrizi H B,et al.Performance evaluation of a natural-convection solar airheater with a rectangular-finned absorber plate[J].Energy Conversion and Management,2011,52(2):1215-1225.
[9]Sara O N,Pekdemir T,Yapici S,et al.Heat transfer enhancement in a channel flow with perforated rectangular blocks[J].Heat Fluid Flow,2001,22(5):509-518.
[10]Karwa R,Maheshwari B K.Heat transfer and friction in an asymmetrically heated rectangular duct with half and fully perforated baffles at different pitches[J].International Communications in Heat&Mass Transfer,2009,36(3):264-268.
[11]Chamoli S,Thakur N S.Heat transfer enhancement in solar air heater with V-shaped perforated baffles[J].Journal of Renewable and Sustainable Energy,2013,5(2):222-231.
[12]Shin S,Kwak J S.Effect of hole shape on the heat transfer in a rectangular duct with perforated blockage walls[J].Journal of Mechanical Science And Technology,2008,22(5):1945-1951.
[13]Augustus L M,Kumar S.Mathematical modeling and thermal performance analysis of unglazed transpired solar collectors[J].Solar Energy,2007,81(1):62-75.
[14]Van Decker G W E,Hollands K G T,Brunger A P.Heat-exchange relations for unglazed transpired solar collectors with circular holes on a square or triangular pitch[J].Solar Energy,2001,71(1):33-45.
[15]Cho H,Jabbari M,Goldstein R.Experimental mass(heat)transfer in and near a circular hole in a flat plate[J].Journal of Heat and Mass Transfer,1997,40(10):2431-2443.
[16]Gupta M K,Kaushik S C.Performance evaluation of solar air heater for various artificial roughness geometries based on energy,effective and exergy efficiencies[J].Renewable Energy,2009,34(3):465-476.