ARMSTRONGDE智能变频泵介绍课件.ppt

Now we move to integrated controls. Note that all pumping units with integral controls in North America are approved to UL STD 778 and CSA STD C22.2 No 108 and the same process and quality is repeated for other regions of the world. This allows a user to use the units as they would for a ‘drive on the wall’ and much more. Armstrong companies innovated the Sensorless pump integrated control technology, which has been used in Europe for 15 years, specifically for the HVAC industry. The Sensorless Control feature allows the lowest installation and operating cost equipment in new and retrofit buildings. The Sensorless function acts as a “virtual sensor” and allows us to control the pump in the same way as sensor - only without the sensor. * The most common replaced item on pumps is the mechanical seal. Seal changeout is much faster 30mins versus 2 hrs compared to base-mount. Also 4300 VILs don’t use bearings which dramatically reduces failures and maintenance costs. When adopting a parallel pump approach it is important to consider the staging methodology for the pumps. This slide shows two different methods, Armstrong’s best efficiency staging approach where pumps are stage on and off based on best efficiency and the traditional approach of staging based on pump speed. The latter is typical of BMS control where pumps are staged on around 95% of full speed and off at 55% speed. Clicking through the animation shows the energy impact of delayed staging in the traditional approach where the efficiency has fallen off before the next pump is staged on. The late stage off with BMS systems has similar performance impact. * Over-laying our building load profile shows that the areas where underperformance occurs with BMS approaches is actually where the building spends most of time in operation! Considering a simple example, the use of Armstrong best efficiency staging can save 36% of the energy consumed in BMS parallel pumping schemes. * * * About the Plant Room at City