Pyrometric Temperature Measurements on Solar Thermal Receivers

̈nder, Markus Pfa; Heller, Peter; ̈pfert, Eckhard Lu

doi:10.1115/isec2005-76183

Cited by 3 publications

(3 citation statements)

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“…We think that it is the smaller variation of incident angle on collector aperture than that of after 14:40 that causes the slow reduction of solar-weighted absorbance and then causes the mild slope in fig. 8 according to equation (5).…”

Section: A Data Reductionmentioning

confidence: 99%

Thermal performance study of a parabolic trough collectoer based on heat transfer oil

Xiong

et al. 2013

2013 International Conference on Materials for Renewable Energy and Environment

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Based on the parabolic trough collector developed by ourselves, an experiment system is established to evaluate the thermal performance of the parabolic trough collector. Experiments on the thermal performance of the parabolic trough collector have been carried out at different thermal and fluid conditions. Experimental results show that peak efficiency of the parabolic trough collector exceeds 70% at a average thermal oil temperature of 305 and is close to that level of the commrcialized EUROTRGH collectors, which implies that steel structure of the collector is good and error of the tracking and driving system is very low.

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Section: A Data Reductionmentioning

confidence: 99%

Thermal performance study of a parabolic trough collectoer based on heat transfer oil

Xiong

et al. 2013

2013 International Conference on Materials for Renewable Energy and Environment

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“…的光谱范围为 8~14 μm 的特性, 表面现场温度测量法借助于光波识别范围为 7~14 μm 红外高温计或红外热像仪来测量玻璃套管的外表面温度, 不考虑集热管的传热平衡问题, 通过数学关联式粗略计算集热管的热损失 [6,7] . 由于玻璃套管的温度受环境温度、天空温度、风速、太阳辐射、环形空间真空度、选择性涂层的属性等影响很大, 因此这种方法只能作为评估集热管性能的一个相对指标, 提供集热管环形空间真空度损失和选择性涂层可能退化的信息.…”

Section: 由于太阳能热发电站现场测量传热流体温度、流量等上述参数的不可行性及集热管的玻璃套管发射unclassified

槽式太阳能集热管传热损失性能的数值研究

张¹,

马²,

吴³

et al. 2010

Sci. Sin.-Tech.

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“…Because of the inconvenience of the latter method refs. [5][6][7] used the infrared camera and pyrometer to measure the outer surface temperature of glass envelop and absorber respectively and evaluate the heat loss of HCE qualitatively. Kalogirou et al [8] simulated the DSG (direct steam generation) parabolic trough collector system, evaluated the efficiency of the system and optimized the DSG system configuration.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of thermal performance of heat loss of parabolic trough receiver

Xiong

et al. 2010

Sci. China Technol. Sci.

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Based on the analysis of computation methods and heat transfer processes of the parabolic trough receiver running in steady state, a two-dimensional empirical model was developed to investigate the thermal performance of heat loss of parabolic trough receivers under steady state equilibrium. A numerical simulation was conducted for the parabolic trough receiver involved in a literature. Comparisons between numerical and experimental results show that the empirical model is accurate enough and can be used to investigate the thermal performance of heat loss of parabolic trough receivers. The thermal performance of heat loss of UVAC3 and the new-generation UVAC2008 was investigated respectively. The simulation results show that selective coatings and annular pressure influence the thermal performance of heat loss of parabolic trough receivers greatly, wind velocity influences the thermal performance of thermal loss of parabolic trough receivers only a little in contrast with the emittance of selective coatings and air pressure in annular space. And the thermal performance of thermal loss of the new-generation parabolic trough receiver has been improved in a large amount.parabolic trough receiver, two-dimensional empirical model, thermal performance of heat loss, annular space, selective coating, wind velocity Citation:Xiong Y X, Wu Y T, Ma C F, et al. Numerical investigation of thermal performance of heat loss of parabolic trough receiver. Nomenclature col : q  total collector thermal energy output, W/m abs : q  absorbed thermal energy of HCE, W/m2 in : h enthalpy of heat transfer fluid in inlet of HCE, J/Kg out : h enthalpy of heat transfer fluid in outlet of HCE, J/Kg m : q mass flow rate of heat transfer fluid, kg/s heatsource : P power of heat source, W 56conv : q  convection heat transfer rate between outer surface of glass envelop and ambient air per meter receiver length, W/m 57rad : q  radiation heat transfer rate between outer surface of glass envelop and sky per meter receiver length, W/m 45cond : q  conduction heat transfer rate through glass envelop wall per meter receiver length, W/m 34conv : q  convection heat transfer rate between outer surface of steel absorber and inner surface of glass envelop per meter receiver length, W/m 34rad : q  radiation heat transfer rate between outer surface XIONG YaXuan, et al. Sci China Tech Sci February (2010) Vol.53 No.2 445 of steel absorber and inner surface of glass envelop per meter receiver length, W/m 23cond : q  conduction heat transfer rate through steel absorber wall per meter receiver length, W/m heatloss : q  total heat transfer rate between outer surface of glass envelop and ambient per meter receiver length, W/m 34 : h convection heat transfer coefficient of annulus gas at T 34 in annular space, W/m 2 K 1 56 : h convection heat transfer coefficient of air at T 56 around the horizontal glass envelop, W/m 2 K 1 D 2 : inside diameter of absorber pipe, m D 3 : outside diameter of absorber pipe, m D 4 : inside diameter of glass envelop, m D 5 : outs...

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Pyrometric Temperature Measurements on Solar Thermal Receivers

Cited by 3 publications

References 0 publications

Thermal performance study of a parabolic trough collectoer based on heat transfer oil

Thermal performance study of a parabolic trough collectoer based on heat transfer oil

槽式太阳能集热管传热损失性能的数值研究

Numerical investigation of thermal performance of heat loss of parabolic trough receiver

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