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ISO 13579-11:2017 Industrial furnaces and associated processing equipment - Method of measuring energy balance and calculating energy efficiency - Part 11: Evaluation of various kinds of efficiency >
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ISO 13579-11:2017 Industrial furnaces and associated processing equipment - Method of measuring energy balance and calculating energy efficiency - Part 11: Evaluation of various kinds of efficiency, 2017
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Symbols
- 5 Boundary and energy (enthalpy)
- 5.1 Configuration of the area of evaluation
- 5.2 Classification of boundary
- 5.3 Classification of energy (enthalpy)
- 5.4 Calculation of energy (enthalpy)
- 5.4.1 Energy input to the heating chamber (Eh)
- 5.4.2 Energy required for process (Epr)
- 5.4.3 Sensible heat of exhaust gas at the outlet of combustion chamber
- 5.4.4 Sensible heat of exhaust gas at the outlet of heat recovery equipment
- 5.4.5 Sensible heat of exhaust gas at the inlet of heat recovery equipment
- 5.4.6 Recovery heat (Eh,re)
- 5.4.7 Thermal energy loss (El)
- 5.4.8 Electrical energy loss in electroheating (El,eh)
- 5.4.9 Energy consumed in auxiliary equipment (Eaux)
- 5.4.10 Energy consumed in generation of utilities (Eu,gen)
- 5.4.11 Electrical generation loss (El,eg)
- 5.4.12 Fuel equivalent energy of electricity (Efe,el)
- 5.4.13 Recycled energy (Ercy)
- 6 Efficiency based on enthalpy
- 6.1 General formula
- 6.2 Examples of typical efficiencies
- 6.2.1 General
- 6.2.2 Overall efficiency in accordance with ISO 13579‑1
- 6.2.3 Heat efficiency on the whole calorific value basis
- 6.2.4 Heat efficiency on the supplied calorific value basis
- 6.2.5 Available heat ratio
- 6.2.6 Combustion efficiency
- 6.2.7 Effective waste heat recovery ratio in combustion furnace
- 6.2.8 Waste heat recovery ratio as performance indicator of heat recovery equipment
- 6.2.9 Ratio of waste heat of combustion exhaust gas to calorific value of fuel
- 6.2.10 Converted available heat ratio where waste heat recovery is not considered
- 7 Efficiency based on exergy
- 7.1 General
- 7.2 Boundary
- 7.3 Classification of exergy
- 7.4 Calculation of exergy
- 7.4.1 Exergy input from electrical source (EXh,el)
- 7.4.2 Exergy of fuel (EXh,fuel)
- 7.4.3 Exergy of exothermic reaction (EXreact,exo)
- 7.4.4 Exergy of sensible heat of fluid at the inlet (EXs,fluid)
- 7.4.5 Exergy in energy required for drying and evaporation (EXpr,ev)
- 7.4.6 Exergy required for endothermic reaction for heated material (EXpr,re)
- 7.4.7 Exergy in given enthalpy to product (EXpr,en)
- 7.4.8 Exergy of exhaust gas (EXex,oc, EXex,or, EXex,ir)
- 7.4.9 Recovery exergy (EXh,re)
- 7.4.10 Exergy in required for heating jigs and other substance (EXl,j)
- 7.4.11 Exergy in heat loss from furnace structure (EXl,fs)
- 7.4.12 Exergy in energy required for heat storage of furnace structure (EXl,hs)
- 7.4.13 Exergy in given enthalpy to atmosphere gas (EXl,atm)
- 7.4.14 Exergy consumed in electroheating (EXl,eh)
- 7.4.15 Exergy consumed in auxiliary equipment (EXaux)
- 7.4.16 Exergy consumed in generation of utilities (EXu,gen)
- 7.4.17 Exergy of recycled energy (EXrcy)
- 7.5 Efficiency
- 7.5.1 General formula
- 7.5.2 Examples of typical efficiencies
- 8 Designation
- 8.1 General
- 8.2 Individual item block
- 8.3 Type of operation
- 8.4 Energy source
- 8.5 Example
- 9 Measurement
- 10 Evaluation report
- Annex A (informative) Example of energy efficiency evaluation
- Annex B (informative) Comparison of enthalpy efficiency and exergy efficiency of continuous reheating furnaces
- Annex C (informative) Procedure for estimation of energy saving effect of combustion furnaces
- Bibliography [Go to Page]