Influence of Different Surface Treatment Methods on Heat Dissipation of Greenhouse Heating Pipeline
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摘要:
大型连栋玻璃温室常采用光管散热器作为采暖材料，一般采暖管道常采用喷塑、喷漆、挂镀等不同的表面处理方式。为减少能源消耗、保证热量利用率，研究了不同表面处理方式对采暖管道散热量的影响，结果表明，3种表面处理方式中，喷塑和喷漆的采暖管道散热量较大，喷塑管道的金属热强度最大。所得研究结果为采暖管道散热器在温室中的实际应用提供理论基础和经验数据。
Abstract:Large multi span glass greenhouses often use smooth tube radiators as heating materials．Generally, different surface treatment methods such as plastic spraying, painting and hanging plating are often used for heating pipes．In order to reduce energy consumption and ensure heat utilization, influence of different surface treatment methods on heat dissipation of heating pipes were studied．Results showed that among three surface treatment methods, heat dissipation of plastic spraying and painting heating pipeline was larger, and metal thermal strength of plastic spraying pipeline was the largest．The research results could provide theoretical basis and empirical data for practical application of heating pipe radiator in greenhouse．
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Keywords:
- heating pipeline /
- heat dissipation /
- glass greenhouse /
- surface treatment method
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表 1 喷塑散热管道测试结果
Table 1. Test results of spray cooling pipe
项目 工况1 工况2 工况3 进口温度/°C 75.02 94.86 55.01 出口温度/°C 50.38 59.78 40.33 空气基准温度/°C 17.96 18.16 18.24 流量/（10 kg·s-1） 2.70 2.71 2.70 过余温度/K 44.74 59.22 29.43 进口比焓/（kJ·kg-1） 314.03 397.91 230.22 出口比焓/（kJ·kg-1） 210.85 250.17 168.83 散热量/ W 278.59 100.38 165.75 
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表 2 喷漆散热管道测试结果
Table 2. Test results of spray paint heat dissipation pipe
项目 工况1 工况2 工况3 进口温度/°C 75.00 91.98 54.96 出口温度/°C 50.20 59.56 40.24 空气基准温度/°C 18.08 18.21 18.15 流量/（10 kg·s–1） 2.72 2.73 2.71 过余温度/K 44.52 59.03 29.45 进口比焓/（kJ·kg–1） 313.95 397.91 230.01 出口比焓/（kJ·kg–1） 210.10 219.25 168.16 散热量/ W 282.17 105.84 166.80
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表 3 挂镀散热管道测试结果
Table 3. Test results of hanging plating heat dissipation pipe
项目 工况1 工况2 工况3 进口温度/°C 74.99 95.00 51.89 出口温度/°C 50.85 60.08 40.54 空气基准温度/°C 18.03 18.26 18.32 流量/（10 kg·s–1） 1.87 1.86 1.87 过余温度/K 44.89 59.24 29.44 进口比焓/（kJ·kg–1） 313.90 397.99 230.09 出口比焓/（kJ·kg–1） 212.81 251.43 169.71 散热量/ W 189.04 272.60 112.91
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