电机变频控制实现换热器节能的应用研究

结合寒冷地区气候特点与通信机房温控的现状,针对50%浓度乙二醇溶液为工质的换热器,试验研究了自然冷源利用率与换热器自身变频节能的关系。结合乙二醇冷剂的特性,通过建立功率与频率关系模型、温差与功率和频率关系模型,实现了换热器循环泵和风机的变频控制策略。结果表明:在室内外温差、换热功率与循环泵、风机频率同时满足的条件下,以功率模型作为参数进行换热器自身的变频节能是可行的。通过对哈尔滨地区的气候数据与散热房控温试验分析,证明了乙二醇换热器的变频节能效果。

Application Research on Energy Saving of Heat Exchanger byFrequency Conversion Control for Electric Motor

Combined with the cold region climate characteristics and the current situation of temperature control in heating room, the relationship between the natural cold source utilization rate and variable frequency energy saving of heat exchanger itself which working fluid was 50% concentration glycol solution was experimentally studied. The results showed that with the parameter of power model, it was feasible for the variable frequency energy saved of heat exchanger itself, under the satisfied conditions of difference in temperature of inside and outside, pump and fan operating frequency, heat exchanger power at the same time. The variable frequency energy saved effect of ethylene glycol heat exchanger was proved in terms of the analysis of climate data, palisade structure heat exchanger and center temperature control test in Harbin.