在等温降的热水采暖系统的水力平衡计算中,各并联环路的压力损失应当相等,以保证备用热设备的热水流量都能符合设计要求。但是,实际可选用的管径规格是有限的,很难达到各并联环路的完全平衡。因此,在设计规范中往往对允许的水力平衡差 In the calculation of the hydraulic balance of the isothermal drop hot water heating system, the pressure loss of each parallel loop should be equal to ensure that the hot water flow of the standby thermal equipment can meet the design requirements. However, the actual available pipe diameter specifications are limited, and it is difficult to achieve full balance of each parallel loop. Therefore, the allowed hydraulic balance difference is often