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Analysis of the Dynamic Energy Performance of an HVAC System by Combining Simulations and Measurements 结合模拟和测量分析暖通空调系统的动态能量性能
对运行中的暖通空调系统与占用的办公空间之间的动态相互作用进行了联合监测和仿真分析。为期两周的详细监测,包括地表和室内空气温度和能量流动,是在一间有人居住的办公室内进行的。测量变量,如环境温度、太阳辐射、光的热增益等,被用作模拟的输入数据。从而有助于分析预期绩效和监控绩效之间可能存在的差异。所讨论的建筑有一个变量- 用于单独室温控制的风量(VAV)系统。测量的房间空气温度为23℃+或-0.3℃。对监测数据和模拟结果的分析表明,在加热器完全关闭且送风流量减少的高热负荷期间,热峰值需求将降低。此时也必须允许较大的室温变化。替代系统设计为恒定风量(CAV)系统,将使送风系统的热峰值需求从350 W降至135 W。 分析表明,如果允许更大的室温变化(22℃+或-1℃),则结构中存储的能量可以更有效地利用。这些模拟是使用瑞典建筑热行为模拟程序进行的。监测数据和模拟数据之间的对比关系良好。关键词:供暖、通风、空调、计算、监测、测量、能耗、性能、办公室、房间、建筑物、表面温度、空气温度、环境温度、太阳辐射、热增益、照明、变风量空调、计算机程序、比较引文: 研讨会论文,马里兰州巴尔的摩,1992年
Presents an analysis, based on combined monitoring and simulation of the dynamic interaction between HVAC system in operation and an occupied office room. The detailed two-week monitoring, including surface and room air temperatures and energy flows, was carried out in an occupied office room. Measured variables, such as ambient temperature, solar irradiation, heat gain by lights, etc, were used as input data for the simulations. An analysis of possible discrepancies between expected performance and monitored performance is thereby facilitated. The building in question has a variable-air-volume (VAV) system for individual room temperature control. The measured air temperature of the room is 23 deg + or - 0.3 deg C. The analysis of the data monitored and the simulation results indicate that the thermal peak demand would decrease during periods of high heat loads with the heater turned off completely and the supply air flow reduced. A somewhat larger room air temperature variation also must be permitted then. The alternative system design, a constant-air-volume (CAV) system, would reduce the thermal peak demand from 350 W to 135 W for the supply air system exclusively. The analysis indicates that the energy stored in the structure may be more efficiently utilised if a greater room temperature variation, 22 deg C + or - 1 deg C, is permitted. The simulations were made using a Swedish simulation program for building thermal behaviour. Comparisons between monitored and simulated data correlate well.KEYWORDS: heating, ventilation, air conditioning, calculating, monitoring, measuring, energy consumption, performance, offices, rooms, buildings, surface temperature, air temperature, ambient temperature, solar radiation, heat gain, lighting, variable volume air conditioning, computer programs, comparing
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