The Reduced Gradient Approach (RGA): An Alternate Method to Optimizing Humidity Conditions in House Museums in Cold Climates
The Reduced Gradient Approach (RGA): An Alternate Method to Optimizing Humidity Conditions in House Museums in Cold Climates
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DOI：
10.1080/15583050903131363
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发表时间：
2010-11
影响因子：
2.4
通讯作者：
R. Richman;K. Pressnail;L. O'Malley;Nastassja Liebenow
中科院分区：
文献类型：
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作者：
R. Richman;K. Pressnail;L. O'Malley;Nastassja Liebenow
现代文物保护方法包括具有高相对湿度水平的侵蚀性内部环境。在室内博物馆中保持高的室内湿度和典型的室内温度已被证明对其建筑围护结构有害。这种封套通常是非隔热的，并且经常经历过度的、不受控制的空气泄漏。因此，潜在的高间隙冷凝和有害的影响，通常伴随着它。对于房子博物馆，解决方案，以减轻这一问题是有限的，因为对原始结构的侵入程度和相关的成本是主要关注。本文提出一种简单、低成本、非破坏性的保护控制技术，适用于家庭博物馆和类似的指定历史建筑。降低梯度的方法涉及操纵室内温度状况，以最大限度地减少全年建筑物围护结构上的水蒸气压差，同时保持所需的室内相对湿度。这种方法将最大限度地减少因空气泄漏而产生的冷凝量。两个独立的研究提出了设计和应用的减少梯度的方法时，适用于一个房子博物馆在寒冷的气候多伦多，安大略，加拿大。结果表明，这种方法作为一个成功的保护策略，为家庭博物馆的内部环境，不危及文物，也没有建筑结构。
The modern approach to artifact preservation comprises an aggressive interior environment with high relative humidity levels. Maintaining high interior humidity coupled with typical interior temperatures in house museums has proved to be detrimental to their building envelopes. Such envelopes are typically un-insulated and often experience excessive, uncontrolled air leakage. Thus, the potential is high for interstitial condensation and the deleterious effects that typically accompany it. For house museums, solutions to mitigate this problem are limited because the degree of intrusiveness on original structure and associated costs are primary concerns. This article presents research on a simple, low-cost, non-destructive preservation control technique applicable to house museums and similar designated historical structures. The reduced gradient approach involves manipulation of the interior temperature regime to minimize the water vapor pressure differential across the building envelope throughout the year while maintaining the desired indoor relative humidity. Such an approach will minimize the amount of condensation due to air leakage. Two separate studies present the design and application of the reduced gradient approach when applied to a house museum in the cold climate of Toronto, Ontario, Canada. The results show that this approach as a successful preservation strategy for house museums with an interior environment that does not jeopardize artifacts nor the building structure.