Thermal performance of closed-cell foam insulation board under different temperature conditions

近年来，加拿大屋顶行业的利益相关者对加拿大极端温度条件和变化的气候条件下闭孔泡沫绝缘的真实现场性能（热阻）表示担忧。研究已经表明，与其他传统的隔热材料如玻璃纤维、矿棉等不同，含捕获发泡剂的闭孔泡沫隔热材料的热阻是温度的非线性函数。闭孔泡沫隔热材料的这种不寻常的热特性导致对建筑围护结构的能量性能的高估。在这种情况下，屋顶行业期待着得到可靠的技术指导，基于全面的研究成果，为反映现场边界温度条件和建筑类型的闭孔泡沫隔热板的实际热阻值。拟议的研究项目旨在通过进一步的实验室、分析和数值研究解决这一问题，并重申加拿大目前屋顶设计和施工做法的可信度。

In recent years concerns have been raised by the stakeholders of Canadian Roofing Industry about the true fieldperformance (thermal resistance) of closed-cell foam insulation in Canadian climates with extreme temperatureconditions and variations. Studies have already indicated that thermal resistance of closed-cell foam insulationwith captive blowing agent/s is a non-linear function of temperature, unlike other traditional thermalinsulations such as glass fiber, mineral wool etc. This unusual thermal characteristic of closed-cell foaminsulation results in over estimation of energy performance of building envelopes. In this scenario, roofingindustry is looking forward to receive credible technical guidance, based on comprehensive research outputs,for realistic thermal resistance value of closed-cell foam insulation board that reflects the field boundarytemperature conditions and type of constructions. The proposed research project aims to address this issuethrough further laboratory, analytical and numerical studies and reaffirm the credibility of current roofingdesign and construction practices in Canada.