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Combined thermal acceptability and air movement assessments in a hot humid climate

机译:在炎热潮湿的气候中结合热可接受性和空气流动评估

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In the ASHRAE comfort database [1], underpinning the North American naturally ventilated adaptive comfort standard [2], the mean indoor air velocity associated with 90% thermal acceptability was relatively low, rarely exceeding 0.3 m/s. Post hoc studies of this database showed that the main complaint related to air movement was a preference for 'more air movement' [3,4], These observations suggest the potential to shift thermal acceptability to even higher operative temperature values, if higher air speeds are available. If that were the case, would it be reasonable to expect temperature and air movement acceptability levels at 90%? This paper focuses on this question and combines thermal and air movement acceptability percentages in order to assess occupants. Two field experiments took place in naturally ventilated buildings located on Brazil's North-East. The fundamental feature of this research design is the proximity of the indoor climate observations with corresponding comfort questionnaire responses from the occupants. Almost 90% thermal acceptability was found within the predictions of the ASHRAE adaptive comfort standard and yet occupants required 'more air velocity'. Minimum air velocity values were found in order to achieve 90% of thermal and air movement acceptability. From 24 to 27 ℃ the minimum air velocity for thermal and air movement acceptability is 0.4 m/s; from 27 to 29 ℃is 0.41 -0.8 m/s, and from 29 to 31 ℃is >0.81 m/s. These results highlight the necessity of combining thermal and air movement acceptability in order to assess occupants' perception of their indoor thermal environment in hot humid climates.
机译:在ASHRAE舒适度数据库[1]中,以北美自然通风适应性舒适度标准[2]为基础,与90%热可接受性相关的平均室内空气速度相对较低,很少超过0.3 m / s。对该数据库的事后研究表明,与空气流动有关的主要抱怨是“更多空气流动”的偏好[3,4]。这些观察结果表明,如果空气速度更高,则可能会将热可接受性转变为更高的工作温度值。可用。如果是这样,是否可以合理地预期温度和空气流动的可接受水平为90%?本文着眼于这个问题,并结合了热和空气运动的可接受百分比,以评估乘员。在位于巴西东北部的自然通风建筑中进行了两次野外试验。这项研究设计的基本特征是室内气候观测与居住者相应的舒适问卷的反应接近。在ASHRAE适应性舒适标准的预测中,发现了近90%的热可接受性,但乘员需要“更高的空气速度”。找到最小风速值以达到90%的热和空气运动可接受性。在24至27℃之间,热和空气运动可接受的最小空气速度为0.4 m / s;从27到29℃为0.41 -0.8 m / s,从29到31℃为> 0.81 m / s。这些结果突出了将热和空气运动可接受性相结合的必要性,以评估乘员在炎热潮湿气候中对其室内热环境的感知。

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