为计算辐射空调系统中冷辐射板吸收太阳辐射能的大小及比例,在分析室内太阳光线传播的基础上,提出采用一种线性方程的方法。结果表明,以本文房间为例,冷辐射板吸收的太阳辐射能的大小以及比例在夏至日表现为正午最小,冷辐射板所吸收的太阳辐射能理论上最大能达到32 W/m2,吸收系数在0.13~0.28之间变化。冷辐射板所吸收的太阳辐射能与表面之间的角系数以及表面对太阳辐射的反射比都有关。因此,计算冷辐射板吸收的太阳辐射时应采用动态的算法以及考虑各个因素的影响。
Abstract
To calculate the value and ratio of the solar radiation energy entering the room absorbed by the cold radiant panels, based on the analysis of indoor solar light propagation, a linear equation method is proposed in this paper. The results show that taking the room as an example, the solar radiation energy absorbed by the cold radiant panels and the absorption ratio are the smallest at noon on the summer solstice. The theoretical maximum value of solar radiation energy absorbed by a cold radiant panel is 32 W/m2, and the absorption coefficient varies from 0.13 to 0.28. The solar radiation energy absorbed by the cold radiant panels is related to the view factor between each surface and the reflection ratio of each surface to solar radiation. Therefore, when calculating the solar radiation absorbed by the cold radiant panels, a dynamic algorithm and the influence of various factors should be considered.
关键词
太阳辐射 /
辐射制冷 /
能量吸收 /
冷辐射板 /
辐射系统
Key words
solar radiation /
radiative cooling /
energy absorption /
cold radiant panels /
radiant systems
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
参考文献
[1] ZHAO K, LIU X H, JIANG Y.Cooling capacity prediction of radiant floors in large spaces of an airport[J]. Solar energy, 2015, 113: 221-235.
[2] PANTELIC J, SCHIAVON S, NING B S, et al.Full scale laboratory experiment on the cooling capacity of a radiant floor system[J]. Energy and buildings, 2018, 170: 134-144.
[3] CARLI M D, SCARPA M, TOMASI R, et al.DIGITHON: A numerical model for the thermal balance of rooms equipped with radiant systems[J]. Building and environment, 2012, 57: 126-144.
[4] TANG H D, ZHANG T, LIU X H, et al.Novel method for the design of radiant floor cooling systems through homogenizing spatial solar radiation distribution[J]. Solar energy, 2018, 170: 885-895.
[5] CARLI M D, TONON M.Effect of modeling solar radiation on the cooling performance of radiant floors[J]. Solar energy, 2011, 85(5): 689-712.
[6] WEN J, SMITH T F.Absorption of solar energy in a room[J]. Solar energy, 2002, 72(4): 283-297.
[7] 黄小君, 李念平, 郑德晓, 等. 太阳辐射对辐射顶板供冷能力和负荷的影响[J]. 太阳能学报, 2017, 38(7): 1779-1785.
HUANG X J, LI N P, ZHENG D X, et al.Effect of solar radiation on cooling capacity and load of radiant roof[J]. Acta energiae solaris sinica, 2017, 38(7): 1779-1785.
[8] FENG J J, SCHIAVON S, BAUMAN F.Cooling load differences between radiant and air systems[J]. Energy and buildings, 2013, 65: 310-321.
[9] SHINODA J, KAZANCI O B, TANABE S, et al. A review of the surface heat transfer coefficients of radiant heating and cooling systems[J]. Building and environment, 2019, 159: 106156.1-106156.14.
[10] ASHRAE. ASHRAE handbook-HVAC systems and equipment[M]. Atlanta: American Society of Heating, Refrigerating and Air-Conditioning Engineers, 2016.
[11] 杨世铭, 陶文铨. 传热学[M]. 北京: 高等教育出版社, 2006: 365-383.
YANG S M, TAO W Q.Heat transfer[M]. Beijing: Higher Education Press, 2006: 365-383.
[12] CAUSONE F, CORGNATI S P, FILIPPI M, et al.Solar radiation and cooling load calculation for radiant systems: Definition and evaluation of the direct solar load[J]. Energy and buildings, 2010, 42(3): 305-314.
[13] 温正. Fluent流体计算应用教程[M]. 北京: 清华大学出版社, 2013.
WEN Z.Fluent fluid computing application tutorial[M]. Beijing: Tsinghua University Press, 2013.
[14] 葛绍岩, 那鸿悦. 热辐射性质及其测量[M]. 北京: 科学出版社, 1989.
GE S Y, NA H Y.Thermal radiation properties and measurement[M]. Beijing: Science Press, 1989.
[15] HOWELL J R, SIEGEL R, MENGUC M P.Thermal radiation heat transfer[M]. New York: Hemisphere Publishing Corporation, 1992.
基金
国家科技部“十三五”重点支撑项目（2017YFC0702501）
PDF(1631 KB)
