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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(2～5m)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。
The research background and technical approaches of large temperature difference fan coil unit are introduced, and the performance test data under various operating conditions of the unit are analyzed in depth. The analysis results show that the cooling performance of the unit is reliable. When the unit inlet water temperature is respectively 7, 6 and 5 ℃ and the corresponding inlet and outlet water temperature differences are respectively 7, 8 and 9 ℃, the cooling capacity of the developed unit reaches Or greater than the national standard value of conventional units; Unit inlet water temperature is reduced by 1 ℃ and the temperature difference increases 1 ℃, the unit’s cooling capacity increased; heating conditions, the inlet water temperature of 55 ℃, When the block heat supply is higher than the national standard value, the inlet water temperature is 50 ℃, the unit block heat supply close to the national standard rating, but the inlet water temperature is 45 ℃, the unit heat is obviously less than the national standard rating. Test results show that the rated water resistance of the development unit within a reasonable range (2 ~ 5m). The analysis of measured data shows that the unit configuration of brushless DC motor has good energy-saving, especially in low gear speed conditions. The actual operating data of a project shows that DC motor investment can be recovered within 3 years compared to configuring an AC motor.