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In-Situ Fan Differential Pressure Rise for a Series VAV-Fan-Powered Terminal Unit with SCR Control 带SCR控制的串联VAV风机供电终端装置的现场风机压差升高
开源和商业能源模拟程序需要在使用风扇供电终端装置模拟可变风量(VAV)HVAC系统时,将压差升高作为输入。通常,这些数据由风扇/电机制造商根据标准测试协议生成。然后将风机/电机组安装到成品系列风机供电终端装置中,并由终端装置制造商作为整体设备进行测试。一些博客推荐的价值高达2.5或更高。w、 g.(622.7 Pa)通过风扇的压差升高。在保持0.25 in.的恒定下游静压的情况下,收集了500至1300 ft3/min(0.236至0.613 m3/s)范围内风扇气流速率的静压差数据。w、 g.(62.3帕)使用8英寸。(203毫米)VAV系列风扇供电终端装置。该风扇的静压差上升范围为0。 128至0.246英寸。w、 g.(31.9至61.3帕)。根据这些数据,可以推断出总气流与串联风机静压差之间的线性关系。结果表明,风机两端的低静压上升与风机总气流呈线性关系。这项工作将改善能源模拟程序中使用的输入值,并更好地估计使用风扇驱动终端装置的VAV系统的能源性能。引文:2015年年度会议,佐治亚州亚特兰大,2015年交易,第121卷。2.
Open-source and commercial energy simulation programs require differential pressure rise as an input when simulating variable air volume (VAV)HVACsystems using fanpowered terminal units. Typically, these data are generated by the fan/motor manufacturer under standard testing protocols. The fan/motor set is then installed into the finished series fanpowered terminal unit and the ensemble is tested as a unitary piece of equipment by the terminal unit manufacturer. Some blogs recommend values as high as 2.5 or greater in. w.g. (622.7 Pa) of differential pressure rise across the fan. Differential static pressure data were collected for fan airflow rates ranging from 500 to 1,300 ft3/min (0.236 to 0.613 m3/s) while holding a constant downstream static pressure of 0.25 in. w.g. (62.3 Pa) using an 8 in. (203 mm) VAV series fan-powered terminal unit. The differential static pressure rise for this fan ranged from 0.128 to 0.246 in. w.g. (31.9 to 61.3 Pa). From these data, a linear relationship between total airflow and series fan differential static pressure could be inferred. The results show that the low static pressure rise across the fan can be linearly related to total fan airflow. This work will lead to improved input values for use in energy simulation programs and better estimates for energy performance for VAV systems using fan-powered terminal units.
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