of water per hour per horsepower is a standard rule of thumb for calculating make-up water. Heat Loss: Conclusion
For steam heating systems, you must calculate the total of all radiators, as outlined by ACCA. 4. Fuel Flow Requirement Calculation Steam Boiler Calculations
Steam Generation Rate (lbs/hr)=BHP×34.5Steam Generation Rate (lbs/hr) equals BHP cross 34.5 Example: A boiler can produce of steam per hour. 2. Calculating Boiler Efficiency (Direct Method) of water per hour per horsepower is a
Fuel Flow=Total BTU/hr NeededBTU Rating of FuelFuel Flow equals the fraction with numerator Total BTU/hr Needed and denominator BTU Rating of Fuel end-fraction Example: A boiler requires roughly per hour . 5. Important Boiler Room Thumb Rules Boiler Sizing Calculation
When replacing or installing a new boiler, it is vital to calculate the load correctly to avoid "short-cycling" (frequent turning on/off), which wastes fuel and causes premature wear.
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η=Quantity of Steam (Q)×(Enthalpy of Steam H−Enthalpy of Water h)Fuel Consumption (q)×Gross Calorific Value (GCV)×100eta equals the fraction with numerator Quantity of Steam open paren cap Q close paren cross open paren Enthalpy of Steam cap H minus Enthalpy of Water h close paren and denominator Fuel Consumption open paren q close paren cross Gross Calorific Value open paren cap G cap C cap V close paren end-fraction cross 100 : kg/hrkg/hr lbs/hrlbs/hr : kcal/kgkcal/kg BTU/lbBTU/lb GCVcap G cap C cap V : kcal/kgkcal/kg BTU/lbBTU/lb Typically, well-maintained industrial boilers run at efficiency . 3. Boiler Sizing Calculation