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浙江大学学报(工学版)
Journal of ZheJiang University (Engineering Science)  2019, Vol. 53 Issue (7): 1415-1422    DOI: 10.3785/j.issn.1008-973X.2019.07.022
Traffic Engineering, Civil Engineering     
Influencing factors on infiltration rate of heating rooms in hot summer and cold winter zone
Jian GE(),Deng-hui WANG,Kang ZHAO*()
College of Civil Engineering and Architecture, Zhejiang University, Hangzhou 310058, China
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Abstract  

The flow rate of air infiltration and corresponding influencing factors were measured and analyzed. The air exchange rates with different heating methods and temperature difference between the indoor and outdoor air were tested in the experiment room by using the tracer gas method. The test results show that the air exchange rate in heating room increases by 35%-40% compared with that without heating when the temperature difference between the room and the outside reaches 6-8 °C under the same conditions of the airtightness of doors and windows. As to the influence of the heating methods on the air exchange rate, it is slightly larger when the room is heated by supplying hot air than that in the room with radiant floor heating methods. The increase in the air infiltration caused by space heating should be considered when designing the residential heating system in this region.

Key words： hot summer and cold winter zone      air infiltration rate      tracer gas method      warm-air heating      radiant floor heating     
Received: 23 October 2018      Published: 25 June 2019
CLC:  TU 111  
Corresponding Authors: Kang ZHAO     E-mail: gejian1@zju.edu.cn;zhaok@zju.edu.cn
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Jian GE
Deng-hui WANG
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Cite this article:

Jian GE,Deng-hui WANG,Kang ZHAO. Influencing factors on infiltration rate of heating rooms in hot summer and cold winter zone. Journal of ZheJiang University (Engineering Science), 2019, 53(7): 1415-1422.

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http://www.zjujournals.com/eng/10.3785/j.issn.1008-973X.2019.07.022     OR     http://www.zjujournals.com/eng/Y2019/V53/I7/1415


夏热冬冷地区供暖房间冷风渗透影响因素

对夏热冬冷地区住宅房间供暖时的室外冷风渗透量及影响因素开展实测研究. 采用示踪气体法，在实验房间中测试不同供暖方式及室内外温差情况下，房间换气次数的变化规律. 测试结果表明，在相同的门窗密闭情况下，当供暖房间室内、外温差达到6~8 °C时，换气量比无供暖时增加35%~40%；在相同的室内、外温差下，采用对流送风方式时的房间换气次数略大于采用地板辐射供暖时的换气次数；在该地区设计住宅供暖系统时，应考虑采用不同的供暖方式对室内、外温差引起的渗风量增加的影响.


关键词： 夏热冬冷地区,  渗风,  示踪气体法,  送风供暖,  辐射供暖 
Fig.1 Experimental platform and testing room
Fig.2 Diagram of heating system
测试参数 仪器型号 精度
注：1）该型号CO2检测仪用于验证测试房间CO2的均匀性.
$\varphi$(CO2) Telaire 7001 ±5×10?5或±5%
$\varphi$(CO2) WEZY-11） ±7.5×10?5
温度 HOBO U12 ± 0.35 °C
风速 WFDYZY-1 ± 0.05 m/s或5%
Tab.1 Test instruments and accuracy
Fig.3 Location of measuring points
Fig.4 Comparison of CO2 volume fraction at different height
h/m δ/% h/m δ/%
0.7 2.8 1.5 2.8
1.2 2.7 2.0 2.9
Tab.2 Average deviation of CO2 volume fraction at different height
Fig.5 Variation of CO2 volume fraction at different location
位置 δ 位置 δ
测点1 1.0 测点3 1.8
测点2 1.8 测点4 1.0
Tab.3 Average deviation of CO2 volume fraction at each point
位置 n/h?1 δ/%
测点1 1.037 1.4
测点2 0.974 4.7
测点3 1.109 8.5
测点4 0.969 5.2
平均值 1.022 ?
Tab.4 Value of air change rate calculated according to each point’s CO2 volume fraction
Fig.6 Window seams between sealed and unsealed sliver seals
Fig.7 Door seams between sealed and unsealed seal strips
工况 窗的密闭情况 门的密闭情况
Ⅰ 设置毛条，无缝隙 设置胶条，无缝隙
Ⅱ 无毛条，缝隙面积约为29.2 cm2 设置胶条，无缝隙
Ⅲ 设置毛条，无缝隙 无胶条，缝隙面积约为72.0 cm2
Ⅳ 无毛条，缝隙面积约为29.2 cm2 无胶条，缝隙面积约为72.0 cm2
Tab.5 Cases with different airtightness of doors and windows
Fig.8 Variation of indoor and outdoor CO2 volume fraction with different airtightness of doors and windows
工况 θin/°C θout/°C Δθ/°C $\bar v$/（m·s?1） n/h?1
Ⅰ 30.5 24.4 6.1 0.1 0.000
Ⅱ 28.7 22.5 6.2 1.1 0.497
Ⅲ 30.4 24.9 5.5 0.2 1.272
Ⅳ 30.7 24.4 6.3 0.8 1.805
Tab.6 Air exchange rate with different airtightness of doors and windows and corresponding environmental parameters
Fig.9 Variation of indoor and outdoor CO2 volume fraction without heating
工况 供暖形式 θin/°C θout/°C Δθ/°C $\bar v$/（m·s?1） n/h?1
C1 对流送风 27.3 23.8 3.5 0.98 1.114
C2 对流送风 29.4 25.4 4.0 0.23 1.253
C3 对流送风 29.1 24.4 4.7 0.74 1.282
C4 对流送风 27.6 21.3 6.3 0.73 1.420
Tab.7 Air exchange rate with warm-air heating method and corresponding environmental parameters
Fig.10 Variation of indoor and outdoor CO2 volume fraction with warm-air heating method
Fig.11 Change of air exchange rate with warm-air heating method
工况 供暖形式 θin/°C θout/°C Δθ/°C $\bar v$/（m·s?1） n/h?1
R1 辐射供暖 26.7 22.3 4.4 0.67 1.183
R2 辐射供暖 27.3 21.8 5.5 0.72 1.332
R3 辐射供暖 28.6 22.3 6.3 0.69 1.395
R4 辐射供暖 27.0 19.8 7.2 0.63 1.414
Tab.8 Air exchange rate with radiant floor heating method and corresponding environmental parameters
Fig.12 Variation of indoor and outdoor CO2 volume fraction with radiant floor heating method
Fig.13 Change of air exchange rate with radiant floor heating method
Fig.14 Comparison of air exchange rate with different space heating methods
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