大温差风机盘管机组研制
Development of fan-coil units of large water temperature difference
摘要：
介绍了大温差风机盘管机组的研制背景和技术途径，并对研制机组各种工况下的性能测试数据进行了深入分析。分析结果表明：研制机组的供冷性能是可靠的，在机组进水温度分别为7，6，5 ℃，相应进出水温差分别为7，8，9 ℃时，研制机组的供冷量均达到或大于常规机组的国家标准值；机组进水温度降低1 ℃和温差增大1 ℃时，机组的供冷量增加；供热工况下，进水温度55 ℃时，研制机组高挡和中挡时的供热量高于国标值，进水温度50 ℃时，机组高挡供热量接近国标额定值，但进水温度45 ℃时，机组供热量明显达不到国标额定值。测试结果表明，研制机组额定水阻力在合理范围（2～5 m）内。对实测数据的分析显示机组配置无刷直流电动机具有良好的节能性，尤其在中低挡转速工况。某工程的实际运行数据表明，与配置交流电动机相比，直流电动机的投资可在3年内回收。
Abstract：
Presents the research background and technical paths of the unit, and probes into the test data in different conditions. The results show that the cooling capacity of the unit is reliable, reaching or superior to that of conventional on conditions of entering water temperature 7, 6, 5 ℃ and corresponding water temperature difference 7, 8, 9 ℃; that the cooling capacity increases to a certain degree while the entering water temperature decreases 1 ℃ and water temperature difference increases 1 ℃; and that in heating conditions, the heating capacity is higher than the value specified in the national standard in the condition of the high and medium grades with entering water temperature 55 ℃ while heating capacity approaches the standard value with entering water temperature 50 ℃ and is lower markedly than the standard value with entering water temperature 45 ℃. The test result shows that the rated water resistant is within the rational range (resistant head 2 to 5 m). An analysis of the test data shows that the unit is more energy efficient by adopting brushless DC motor especially in medium and low speed conditions. Energy consumption of an actual hotel shows that the additional investment of the electric commutated motor can be reclaimed within 3 years.
Keywords:fan-coilunitoflargewatertemperaturedifference,capacity,test,brushlessDCmotor,coolingcapacity,heatingcapacity