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

近年来，加拿大屋面行业的利益攸关方对闭孔泡沫隔热材料在加拿大极端温度、条件和变化的气候下的真实现场性能(耐热性)提出了担忧。研究已经表明，与玻璃纤维、矿棉等其他传统隔热材料不同，采用自保发泡剂/S的闭孔泡沫隔热材料的热阻是温度的非线性函数。在这种情况下，屋面行业期待着在综合研究成果的基础上，得到可靠的技术指导，以反映现场边界温度条件和建筑类型的闭孔泡沫保温板的实际热阻值。拟议的研究项目旨在通过进一步的实验室、分析和数值研究来解决这一问题，并重申加拿大目前屋顶设计和施工实践的可信度。

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.