摘要
盘管腔式集热器可为太阳能布雷顿循环提供高温空气,也能直接用于工业生产,应用前景广阔。聚焦能流的腔内分布是影响盘管温度梯度和出口空气温度的主要因素,为优化盘管腔式集热器结构,合理分布聚焦能流,对不同结构(高度,腔体直径,管径和盘旋形状)的盘管式空气集热器进行了建模及模拟。模拟过程耦合了光学模型和传热模型,采用蒙特卡洛模型获得腔内能流分布,并将其作为边界条件加载到三维CFD(Computaional Fluid Dynamics,CFD)传热模型中,进而获得集热管内空气的温度场分布,为结构优化提供重要参考。
Tube-cavity receiver can be used to provide hot air for solar-Brayton cycle and industrial production directly,so it has a bright prospect. The distribution of concentrated soalr beam in the cavity is a main factor affecting the temperature gradient of the coiled tube and air outlet temperature. The optimization of the receiver geometry was conducted to make the concentrated light distribute reasonably and different geometries（ cavity height,cavity diameter,tube inner diameter and spiral type） were modeled. The optical model and heat transfer model were coupled in the simulation.Light distribution in the cavity was obtained based on the Monte-Carlo method and the result of light distribution was substituted into the three-dimensional CFD model as the boundary condition to calculate the temperature field of the air inside the coiled tube,which can be significant references for the geometry optimization.
出处
《能源工程》
2015年第2期39-44,50,共7页
Energy Engineering
基金
浙江省重大科技专项计划(2012C01022-1)
关键词
太阳能
盘管
集热器
高温空气
能流分布
温度场
solar energy
coiled tube
receiver
hot air
light distribution
temperature filed
