Comparing the Two Demand Limiting Algorithms - Metasys - LIT-12011288 - Software Application - Metasys Building Automation System - 6

DLLR Technical Bulletin

Product
Building Automation Systems > Building Automation Systems > Metasys Building Automation System
Document type
Technical Bulletin
Document number
LIT-12011288
Version
6
Revision date
2013-10-15

Figure 1 shows an example that compares the Sliding Window Algorithm (SWA) and Fixed Window Algorithm (FWA). As shown, the Sliding Window algorithm reacts immediately to cut down the first demand peak. The Fixed Window algorithm allows a higher consumption because the peak is at the end of the interval, and the total energy consumed during the interval allows this higher consumption. At the beginning of the next interval, the Fixed Window algorithm then reacts and cuts down the demand. Contact the utility company that serves the facility to decide which algorithm to implement.

Figure 1. Difference between Sliding Window and Fixed Window Algorithms