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Energy Management System

Target

˙Information system for

  • Monitoring energy consumption
  • Analyzing deviations of energy consumption from a plan (target)
  • Root Cause Analysis of deviations
  • On-line presenting to users
  • Reporting

Prerequisites

  • Consistent (validated) data about
    • mass balance (throughputs, yields)
    • balance of utilities (energy balance)
    See RECON about Data Validation and Reconciliation.
  • Theoretical target (model) of utilities consumption. Models of increasing complexity
    • constant specific consumption (GJ/t of feed, ...)
    • influence of Modes of operation, raw material, product quality
    • influence of the feed throughput
    • ambient temperature
    • ...

Models can be created by evaluation of historical data, benchmarking, theoretical analysis, ...
Model should be present in a company+s documentation (Databook, ...).

Important attributes of EMan

  • Models (targets) can be dynamic, to reflect changing conditions during production (throughput, ambient temperature, feed quality, modes of operation, ...)
  • Results should be based on validated primary data
  • Respects multidimensionality of the problem, especially the site - utility - time dimensions
  • Comparing the real consumption of utilities with a target calculated from a model
  • Structure (hierarchy of the Site dimension Company - Plant - Process Unit)
  • Possibility of aggregation in all dimensions
  • Trends in the time dimension
  • Impact of subsystems on characteristics of the system
  • Energy consumption can be expressed in energy or in other units (money, CO2, )
  • Application of RCA method (Root Cause Analysis) - the drill down to identify causes of high energy consumption (http://en.wikipedia.org/wiki/Root_cause_analysis).

3 Main dimension of the energy analysis

The Energy OLAP (On/Line Analytical Processing) cube

A tree structure of a company

  • Company
  • Plant
  • Process units
  • Equipment

Relative Energy Demand (RED)

The key variable used in energy consumption analysis is RED - Relative Energy Demand

where target is a value calculated from the Company energy model.

RED = 100 means a neutral energy consumption, just according the plan.
RED expressed in money units is colled Relative Money Demand (RMD).

The Energy Dashboard


http://84.242.83.242/eman_web/Eman.aspx




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