Numerical Analysis of Heat Transfer in Solar Chimney Power Plant

doi:10.7652/xjtuxb201403019

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Numerical Analysis of Heat Transfer in Solar Chimney Power Plant

更新时间：2025-04-29

- Numerical Analysis of Heat Transfer in Solar Chimney Power Plant
- Vol. 48, Issue 3, Pages: 102-107(2014)
- 作者机构：
  
  西安交通大学流体机械及工程系,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201403019
  CLC： O121.8;G558
- Online First：10 March 2014，
  
  Published：2014
- 稿件说明：
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Numerical Analysis of Heat Transfer in Solar Chimney Power Plant[J]. 2014, 48(3): 102-107.
DOI：

Numerical Analysis of Heat Transfer in Solar Chimney Power Plant[J]. 2014, 48(3): 102-107. DOI： 10.7652/xjtuxb201403019.

摘要

为了揭示辐射换热、太阳辐照度以及涡轮压降对太阳能烟囱发电系统性能的影响规律

基于系统内部能量传递机制的理论分析

通过合理选择边界条件

在充分考虑各种气象因素影响下的系统内部多种热效应耦合的数值计算中引入了离散坐标辐射模型、太阳载荷模型及涡轮模型

以解决目前数值研究中物理模型及边界条件选择时需要明确的问题。以西班牙示范电站为原型

对太阳能烟囱发电系统内部的流动换热行为进行了详细的三维数值模拟

并将数值模拟数据与西班牙示范电站的实验数据进行了对比

二者具有良好的一致性。模拟结果表明:集热棚内的辐射换热对棚内温度分布有重要影响

在数值模拟中不能忽略

否则会导致系统内部换热行为完全背离真实的换热过程; 集热棚覆盖层与外界环境对流、辐射换热造成的热量损失是系统内的主要热损失; 涡轮压降对系统性能也会产生显著影响。

Abstract

The research was conducted to investigate the influences of the radiation heat transfer

solar radiation and turbine pressure drop on the performance of a solar chimney power plant. The comprehensive 3D numerical simulations were carried out to examine the heat transfer process in a Spanish prototype. The heat losses in the system were considered in the numerical simulations incorporating the radiation model

solar load model and turbine model and the experimental data for the Spanish prototype were used to verify the simulations. The results show that the radiation heat transfer plays an important role in the heat transfer process inside the collector and the heat loss from the collector roof to the ambient is the major heat loss in the system. In addition

the collector efficiency decreases while the system efficiency gradually increases when the turbine pressure drop increases under the constant solar radiation condition.

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references

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