控制冷却设备用回转接头的设计和应用

本文介绍了控制冷却设备用回转接头的结构、零部件材料、工作原理以及应用实例。

Optimum control strategy for all-variable speed chiller plant

The optimum control strategy and the saving potential of all variable chiller plant under the conditions of changing building cooling load and cooling water supply temperature were investigated. Based on a simulation model of water source chiller plant established in dynamic transient simulation program (TRNSYS),the four-variable quadratic orthogonal regression experiments were carried out by taking cooling load,cooling water supply temperature,cooling water flow rate and chilled water flow rate as variables,and the fitting formulas expressing the relationships between the total energy consumption of chiller plant with the four selected parameters was obtained. With the SAS statistical software and MATHEMATICA mathematical software,the optimal chilled water flow rate and cooling water flow rate which result in the minimum total energy consumption were determined under continuously varying cooling load and cooling water supply temperature. With regard to a chiller plant serving an office building in Shanghai,the total energy consumptions under different control strategies were computed in terms of the forecasting function of cooling load and water source temperature. The results show that applying the optimal control strategy to the chiller plant can bring a saving of 23.27% in power compared with the corresponding conventional variable speed plant,indicating that the optimal control strategy can improve the energy efficiency of chiller plant.

大水量高密直集管冷却装置的研制与开发

本文重点介绍了大水量上下高密直集管冷却装置的设计研制，包括其结构、零件材料、工作原理以及装置特点。该冷却装置具有冷却能力强、冷却均匀，且设备结构较之其他冷却形式维护维修简单等特点。利用该控制冷却设备，对钢板进行控制冷却，达到了预期性能指标。