热媒温差对供热不平衡率和节能率的影响

The influence of temperature difference on the unbalance rate and energy saving rate

为了从末端设备的用热情况中更加直观地得到该末端设备相对于自身用热情况存在的节能潜力,本文通过公式推导得到了量调节、质调节、分阶段改变流量的质调节三种供热系统运行模式下的末端设备节能率与不平衡率和热媒温差三者之间的关系。公式推导结果显示,末端设备的节能率同时受不平衡率和热媒温差两方面因素的影响。推导结论表明,末端设备实际供回水温差ΔtS为定值时,水力不平衡率Xb越大,节能率Xj越大,呈非线性关系;当末端设备水力不平衡率Xb为定值时,实际供回水温差ΔtS越大,节能率Xj越大,呈非线性关系。

In order to obtain more intuitively the energy saving potential of the terminal equipment relative to its own heat use. In this paper, the relationship between the energy saving rate of the terminal equipment, the unbalance rate and the temperature difference of the thermal medium is obtained by formulate under three operating modes of heating system, which include quantity regulation, quality regulation, quality regulation that changes flow rate by stages. The results show that the energy saving rate of the terminal equipment is affected by both the unbalance rate and the temperature difference of the thermal medium. The theoretical calculation indicates When the temperature difference between thermal media of the terminal equipment is constant, when the hydraulic imbalance rate increases, the energy saving rate increases in a non-linear relationship.When the hydraulic imbalance rate of the terminal equipment is constant, the energy saving rate increases in a non-linear relationship when the temperature difference between thermal media increases.