Energy Audit and its benifits

Energy Audit

Introduction

        Energy audit is the first step in order to discover the possibilities of energy savings, prioritizing projects,tracking progress and making system adjustments after investments.Industrial energy audit is a process that makes saving of energy and raw materials possible.

       The most common energy types measured during the auditing process are.
  • Liquid and gas fuel flows.
  • Electrical measurements (voltage,current,load-diagram ,power and power factor).
  • Temperatures of solid and liquid surfaces,including surface thermography.
  • Building infiltration and ex filtration parameters.
  • Pressure of fluids in pipes,furnaces or vessels.
  • Fume gas parameters(CO2,CO,O2 and PM).
  • Relative humidity.
  • Luminance levels.
        All of the acquired data must be carefully processed and interpreted in order to obtain the most accurate result possible.
Benchmarking
        Benchmarking is a very important step in order to acquire plausible (valuable) energy efficiency expectations.The most common benchmarking unit for industrial plants is energy usage per one unit of production.Also it is common industries or energy used per activity.
Energy Balance Diagram
     
      The main advantage of an energy balance diagram is that all energy input can be quantified and balanced against all energy outputs.
Sankey Diagram

        The most convenient graphical representation of this is the Sankey diagram,IN the Sankey diagram,the energy losses or outflows the energy gain or inflows, as well as the usable energy in a given energy system are represented quantitatively and in proportion to the total energy inflow, according to the existing data from energy bills and invoices,calculations and on-site measurements in the plant presenting the energy flows in a visually appealing way with the aid of the Sankey diagram helps to locate the most critical energy consuming area of the energy system and at the same time to identify the sources that lead to energy losses.
Conclusions

  1. Energy efficiency is one of the most important and most cost effective tools that can be applied for any facility,The goal of energy efficiency is to reduce the amount of energy required to provide products and services,or a healthy indoor climate.
  2. Improving facility energy efficiency gives the possibility to decrease CO2 emissions and overall fuel consumption often is the main goal of an energy efficiency program.
  3. There is a lack of knowledge about energy efficiency and what it has to offer.The concept of accessing energy flow from residential buildings,not factories, office buildings or similar industrial facilities.
  4. In order to increase energy efficiency and need for additional energy monitoring devices are recommended.Monitoring devices should be installed for every big energy consumer or at least for every facility in order to be able to monitor energy usage and the usage patterns.

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