通断调节下风机盘管水系统水力特性偏离研究

计算分析了风机盘管水系统通断调节下水力特性变化规律,结果表明关闭某一台风机盘管时,该风机盘管上游的风机盘管发生不等比例失调,下游的风机盘管发生近似等比例失调,各个风机盘管流量最大增加达14.27%,最小增加仅5.16%;关闭的风机盘管的支路压降越大,关闭后水系统的用户侧阻力系数越大且水系统总流量减少的百分比越大,最大减少2.15%;风盘总开启率越大,用户侧阻力系数越小,在相同的总开启率下,开启的风盘越集中在上游,用户侧阻力系数越小。上游风机盘管的水力稳定性系数大于下游风机盘管的水力稳定性系数。

Study on Deviation of Hydraulic Characteristics of Fan Coil System Under On - Off

The variation regularity of hydraulic characteristics under on-off adjustment of fan-coil water system is calculated and analyzed. It is found that when one fan coil is closed, the fan coil at the upstream of that fan coil occurs unequal proportion of disorders,and the fan coil at the downstream occurs approximately proportion of disorders.The maximum flow rate of each fan coil increased by 14.27% and the minimum increase was only 5.16%. The larger the pressure drop of the branch where the fan coil was closed, the larger the user-side drag coefficient of the water system after shutdown. The larger the percentage of reduction of the total flow of the water system after shutdown, the largest decrease of 2.15%. The coefficient of hydraulic stability of upstream fan coil is greater than the coefficient of hydraulic stability of downstream fan coil.