Vacuum insulation panels (VIPs) with a glass-fiber core has been considered to be difficult to operate for a long period of time, such as for building applications, because the thermal conductivity rises rapidly as the pressure increases. However, glass-fiber-core VIPs contain a material called a getter that continuously adsorbs permeated gas, and a theoretical model that considers the properties of the getter has not yet been developed. In this paper, the gas-adsorption mechanism by getters was investigated and a long-term-performance prediction model that considers the temperature dependence was proposed. Some gases were not adsorbed by the getter in the VIPs; however, a model was proposed that takes into account the non-absorbed gases by applying partial pressure to the adsorption isotherm in advance. The long-term performance of VIPs with different areas and volumes was compared with the measured values, and the validity of the calculation results was confirmed. These results show that the long-term performance of VIPs of different sizes can be accurately predicted when the getter performance is well understood.

具有玻璃纤维芯的真空绝热板（VIP）被认为很难长时间操作，例如用于建筑应用，因为随着压力的增加，导热系数会迅速升高。然而，玻璃纤维芯VIP包含一种称为吸气剂的材料，该材料可连续吸附渗透的气体，并且尚未开发出一种考虑吸气剂性能的理论模型。本文研究了吸气剂的气体吸附机理，并提出了考虑温度依赖性的长期性能预测模型。VIP内的吸气剂没有吸收一些气体。但是，提出了一种通过预先对吸附等温线施加分压来考虑未吸收气体的模型。将不同面积和体积的VIP的长期性能与测量值进行了比较，证实了计算结果的有效性。这些结果表明，当很好地理解吸气剂性能时，可以准确地预测不同大小的VIP的长期性能。