| 引用本文: | 瞿家港,曹慧哲,翟金房,殷海洋,蔡伟华.寒冷地区汽机房自平衡通风采暖方案数值模拟[J].哈尔滨工业大学学报,2018,50(8):102.DOI:10.11918/j.issn.0367-6234.201707178 |
| QU Jiagang,CAO Huizhe,ZHAI Jinfang,YIN Haiyang,CAI Weihua.Numerical simulation study on self-balanced ventilation and heating scheme of turbine house in cold area[J].Journal of Harbin Institute of Technology,2018,50(8):102.DOI:10.11918/j.issn.0367-6234.201707178 |
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| 寒冷地区汽机房自平衡通风采暖方案数值模拟 |
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瞿家港1,曹慧哲1,翟金房2,殷海洋2,蔡伟华3
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(1.哈尔滨工业大学 建筑学院,哈尔滨 150006;2.中国电力工程顾问集团 东北电力设计院有限公司, 长春 130021;3.哈尔滨工业大学 能源科学与工程学院,哈尔滨 150001)
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| 摘要: |
| 火力发电厂汽轮机房内部存在很多高温散热设备以及走向复杂的热力管道，导致大量余热聚集在机房顶部.对于此类特殊的高大空间建筑，以往研究重点多放在夏季通风状态下的余热排除，少有将此余热回收用于冬季采暖技术的研究.为研究冬季自平衡采暖方案在寒冷地区发电厂汽机房的可行性，采用CFD模拟技术进行分析.按实际汽机房空间结构建立几何模型，并在此基础上采用结构化网格进行划分，完成数值计算.对比分析汽机房冬季采暖的两种预置方案，并结合模拟结果提出采用射流口代替风机直接射流的优化方案.模拟结果表明：自平衡采暖方式能满足寒冷地区汽机房冬季供暖需求，减少汽机房内部散热器的布置；综合考虑节能与采暖效果，选用方案二的通风量；采用射流口的气流组织优于直接射流，在改善工作层平台处气流组织的同时使速度场分布更加均匀，达到较好的采暖效果.模拟结果从余热利用角度为寒冷地区高大厂房的采暖方案设计提供有益的参考.
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| 关键词: 汽机房 自平衡通风采暖 CFD模拟 余热利用 |
| DOI：10.11918/j.issn.0367-6234.201707178 |
| 分类号:TU832.5 |
| 文献标识码:A |
| 基金项目: |
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| Numerical simulation study on self-balanced ventilation and heating scheme of turbine house in cold area |
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QU Jiagang1,CAO Huizhe1,ZHAI Jinfang2,YIN Haiyang2,CAI Weihua3
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(1.School of Architecture, Harbin Institute of Technology, Harbin 150006, China; 2. Northeast Electric Power Design Institute, China Power Engineering Consulting Group, Changchun 130021, China; 3. School of Energy Science and Engineering, Harbin Institute of Technology, Harbin 150001, China)
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| Abstract: |
| A large number of radiating facilities in turbine house cause tremendous afterheat gathering at the top of the house. While existed studies focus more on afterheat removal in summer, much less has been studied about the afterheat recovery in winter. In order to verify the feasibility of this self-balanced heating scheme in turbine house, CFD simulation was used to analyze it. A geometric model was set up according to actual spatial structure of the turbine house, and calculation was fulfilled with structural mesh. Two presetting heating schemes were compared and the optimized scheme that used airflow of jet tuyere instead of direct jet flow was proposed. The results indicated that the self-balanced heating scheme could meet the heating requirements and reduce the number of radiators; ventilation quantity of scheme 2 was better considering the efficiency of energy saving and heating. In addition, the airflow of jet tuyere was superior to that of direct jet flow, and it also improved the air distribution of the working layer, thereby achieving better heating effect. This paper provides a useful reference for heating design of large plants in cold area from the perspective of waste heat utilization.
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| Key words: turbine house self-balanced ventilation heating CFD surplus heat utilization |
