Training Manual on Energy Efficiency - APO Asian Productivity ...

5.3 LOAD MANAGEMENT STRATEGIES
5.3.1 Rescheduling and staggering loads
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Electrical Load Management
the MD recorder will be computing MD for the duration of 30 minutes as:
(2500 x 4) + (3600 x 12) + (4100 x 6) + (3800 x 8)
= 3606.7 kVA
30
Various techniques applicable to optimize maximum demand of an industry
include:
• Rescheduling loads;
• Staggering of motor loads;
• Storage of products/in process material/process utilities like refrigeration;
• Shedding of non-essential loads;
• Operation of captive power generation; and
• Reactive power compensation.
In Figure 5-3 the left side shows the demand curve of a consumer before load
shifting, and the right side shows the demand curve of a unit after load shifting
(leading to kVA reduction).
Figure 5-3 Load shifting
5.3.2 Storage of products in process materials and process
utilities like refrigeration
In many plants, studies reveal extra capacity available, for producing certain
products, in process material and utilities like pumps and refrigeration, all
of which consume electricity. Using these capacities during lean demand