Indoor temperatures for calculating room heat loss and heating capacity of radiant heating systems combined with mechanical ventilation systems
Indoor temperatures for calculating room heat loss and heating capacity of radiant heating systems combined with mechanical ventilation systems
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DOI：
10.1016/j.enbuild.2015.12.005
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发表时间：
2016-01
影响因子：
6.7
通讯作者：
Xiaozhou Wu;B. Olesen;L. Fang;Jianing Zhao;Fenghao Wang
中科院分区：
文献类型：
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作者：
Xiaozhou Wu;B. Olesen;L. Fang;Jianing Zhao;Fenghao Wang
本研究以一个典型的辐射供暖与机械通风的办公室为研究对象。根据传热学原理，确定了复合系统室内热损失（包括传热损失和通风热损失）和制热量的计算公式。提出了室内温度的预测模型，并确定预测的室内温度与实测数据吻合良好。利用该模型定性分析了受热面温度和换气次数对室内温度的影响。当受热面温度和换气次数分别为21.0 ~ 29.0 °C和0.5 ~ 4.0 h-1时，计算传递热损失和通风热损失的室内温度分别为20.0 ~ 20.3 °C和19.6 ~ 20.5 °C，计算混合系统制热量的室内温度为18.2 ~ 19.8 ℃。相应地，计算传递热损失和通风热损失的相对计算误差分别在0.3%和0.5%之间和-10.2%和11.8%之间，计算混合系统的供热能力的相对计算误差在16.0%和17.4%之间。由于计算相对误差较大，在计算辐射采暖与机械通风相结合系统的通风热损失和制热量时，必须考虑受热面和送冷风对室内温度的影响。
In this study, a typical office room with a radiant heating system and a mechanical ventilation system was selected as the research subject. Indoor temperature formulas for calculating the room heat loss (including transmission heat loss and ventilation heat loss) and heating capacity of the hybrid system were determined according to the principle of heat transfer. A model to predict indoor temperatures in the room was proposed, and it was determined that the predicted indoor temperatures agreed well with the measured data. Qualitative analyses of the effects of heated surface temperature and air change rates on the indoor temperatures were performed using the proposed model. When heated surface temperatures and air change rates were from 21.0 to 29.0 °C and from 0.5 to 4.0 h−1, the indoor temperatures for calculating the transmission heat loss and ventilation heat loss were between 20.0 and 20.3 °C and between 19.6 and 20.5 °C, respectively, and the indoor temperature for calculating the heating capacity of the hybrid system was between 18.2 and 19.8 °C. Accordingly, the relative calculation errors were between 0.3% and 0.5% and between −10.2% and 11.8% for calculating the transmission heat loss and ventilation heat loss, respectively, and between 16.0% and 17.4% for calculating the heating capacity of the hybrid system. Due to large relative calculation errors, it is necessary to consider the effect of heated surface and cool supply air on indoor temperatures for calculating ventilation heat loss and heating capacity of radiant heating systems combined with mechanical ventilation systems.