检查计算方法和隔热技术应用于一个建筑项目，该项目包括在纽约市建造的1200套两层住宅单元。R值是使用几种方法计算的。首先根据三维模型对螺柱和轨道组件的二维有限差分结果进行微调。然后使用二维计算机程序分析整个建筑钢框架结构的精确配置，包括所有双螺柱、残缺螺柱、侧柱、过梁和横梁，以及金属系杆和紧固件。结果强调需要计算整面墙的R值，该值考虑了墙中的所有框架，而不是明确的墙近似值。对于这种类型的房屋，净墙计算的误差在40%到50%之间。研究了热改进的墙体结构。 对于相同的空腔R值中心，带绝缘护套的墙的总R值比不带绝缘护套的墙高13%。改进后，湿气凝结的风险显著降低。关键词:1997年，计算，隔热，墙壁，钢材，公寓，住房，热阻，预制结构，湿度，冷凝，相对湿度，比较引用:研讨会，ASHRAE Trans。1997年，第103卷，第一部分

Examines calculation methods and insulation techniques applied to a construction project that comprises 1,200 two-storey housing units built in New York City. The R-value is calculated using several methods. Two-dimensional finite-difference results for a stud-and-tracks assembley are first fine-tuned against a three-dimensional model. The two-dimensional computer program is then used to analyse the exact configuration of the steel frame construction of the entire building accounting for all double studs, cripple studs, jambs, lintels, and beams, as well as metal ties and fasteners. The results emphasise the need for a whole-wall R-value calculation that accounts for all framing in the wall, rather than a clear-wall approximation. The error of the clear-wall calculation is in the 40 to 50% range for this type of house. Thermally improved wall constructions are examined. For the same centre-of-cavity R-value, a wall with insulating sheathing has a total R-value that is 13% higher than one without insulating sheathing. The risks of moisture condensation is significantly reduced with the improvements.KEYWORDS: year 1997, Calculating, thermal insulation, walls, steel, flats, housing, thermal resistance, prefabricated construction, moisture, condensation, relative humidity, comparing