为了对风冷冷水机组与空调建筑多个制冷回路优化CLS评估能源效率，冷却节能潜力为代表的办公大楼在香港的影响当CLS不同控制策略实施的风冷冷水机组。根据香港[ 10 ] 64商业建筑的调查，高层办公楼的建筑特点进行鉴定和参考建筑被开发为模拟的基础上，这是一个平方的办公楼（36米乘36米）40层。使用EnergyPlus和典型气象年代表当时的天气情况在香港的代表处进行了计算建筑物逐时冷负荷。论文网

To meet the peak cooling load of 7338 kW of the representative office building, the chiller plant was designed with seven air-cooled screw chillers, each of which had a nominal cooling capacity of 1116 kW。 The size of these chillers was comparable to that of the investigated chiller。 The use of equally-sized chillers within a multiple chiller system facilitated implementation of a control strategy and provided more flexible operation and maintenance。 The traditional chiller sequencing of a multiple-chiller system was considered in this study, which was to operate the minimum number of evenly loaded chillers to meet the required cooling load。 

为了满足代表性办公楼的7338千瓦的峰值冷却负荷，冷水机组的设计与七风冷螺杆式冷水机组，其中有一个标称冷却容量为1116千瓦。这些冷水机组的大小相媲美的调查冷水机组。在多台冷水机组系统中使用同等尺寸的冷水机组，有助于实现控制策略，并提供更灵活的操作和维护。在这项研究中，这是操作的最小数量的均匀加载的冷水机组，以满足所需的冷却负荷的冷水机组的传统冷水机组测序被认为是在这项研究中。

4。 Results and discussion 

4。结果与讨论

4。1。 Circuit loading sequence 

4。1 电路加载顺序

For the chillers with multiple refrigeration circuits, there existed various modes of chiller circuit staging which yielded fluctuating efficiency under certain cooling load conditions。 Chiller circuit sequencing was crucial to the improvement of chiller efficiency。 As the studied chiller had two identical refrigeration circuits, the cooling load of the chiller could be shared by the two refrigeration circuits randomly, and there existed optimal load distribution between the two refrigeration circuits rather than split the load equally。 

对于具有多个制冷回路的冷水机组，在不同的负荷工况下，存在不同的制冷方式，使其产生脉动效率。冷水机组的电路排序是提高冷水机组效率的关键。由于所研究的制冷机有两个相同的制冷回路，制冷机组的制冷负荷可由两个制冷回路随机分配，两者之间存在最佳负荷分配，而不是均匀地分配负荷。

In this study, this simulation analysis considered the operating schemes of circuit loading sequence and variable condensing temperature control。 Five operating schemes (CS1 to CS5) were investigated。 Scheme CS1 was the operating scheme that loading with priority was given to the lead circuit when chiller load was less than half of the rated chiller capacity, and kept the capacity of circuits 1 and 2 be equal when the total chiller load was more than half of the rated chiller capacity, which was the traditional circuit sequence control and served as the baseline。 The circuit authorized to start first was the lead circuit。 Scheme CS2 was balanced circuit loading that the control system kept the capacity of circuits 1 and 2 be equal at any time when the chiller operated。 Scheme CS3 was loading with priority given to the lead circuit until the lead circuit was fully loaded, and then the other circuit met the balance of the load when the total chiller load was more than half of the rated chiller capacity。 Scheme CS4 was an optimal CLS, in which chiller load were optimally shared by two refrigeration circuits。