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Heating value and equivalence between fuels (natural gas, propane, oil, firewood, wood chips, biomass), flue gases and stack height, flue ducts and exhaust fans, gas piping and propane installations.
Compare the cost per useful MMBtu of wood, chips, bagasse, natural gas, propane, fuel oil and electricity, with biomass LHV by moisture (ISO 18125).
LHV by moisture, cost per useful MMBtuCompute flue gas flow in Nm³/h and at actual temperature, excess air from O₂, water and sulfuric acid dew points and natural stack draft, with preliminary stack diameter sizing.
Nm³/h, acid dew point, draftAdd up pressure drop in each round or rectangular hot gas duct section, its bends and equipment, find ID fan pressure and flow and the payback of replacing damper control with a VFD.
Sections, equipment, fan pressureCompute natural gas or propane flow from appliance input and size the pipe by allowable pressure drop, with Pole’s formula at low pressure and Renouard at medium pressure.
Pipe size, pressure drop, velocityCompute LP-gas demand in lb/h from appliance input, the natural vaporization of cylinders and ASME tanks by temperature and liquid level, the number of containers and the autonomy.
lb/h, cylinders, ASME tanks, autonomyEstimate boiler efficiency from losses (O₂ and stack temperature), the minimum blowdown from TDS and the savings from combustion tuning, an economizer and blowdown heat recovery.
O₂, stack, blowdown, economizer, flashCalculate steam cost per ton, fuel consumption and the savings from switching between gas, oil, propane and biomass, with payback and NPV.
Cost per ton, fuel use, wood, gas or oilImportant notice: Indus Metrics tools produce estimates and pre-sizing results from the data you enter and from published engineering methods. They do not replace design, calculations or reports signed by a licensed professional engineer (PE), nor verification against the applicable codes, standards and regulations, such as OSHA rules and the ASME codes. Material and fuel properties vary: check manufacturer data or your own process analyses before deciding. By using this site you agree to the Terms of Use.
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