Purchasing Energy-Efficient Large Commercial Boilers ...
Gas: Steam: E t 83.0: Large Oil-Fired Hot Water: Oil: Hot Water: E c 88.5: Large Oil-Fired Steam: Oil: Steam: E t 85.5 *Both thermal efficiency (E t) and combustion efficiency (E c) are based on 10 CFR Part 431.86 - Uniform test method for the measurement of energy efficiency of commercial packaged boilers.
Boiler efficiency (%) = 100 (heat exported by the fluid (water steam..) / heat provided by the fuel) (1) Heat Exported from the Boiler to the Fluid If a fluid like water is used to transfer heat from the boiler - the heat transfer can be expressed as: q = (m / t) cp dT (2)
Boiler Efficiency - an overview | ScienceDirect Topics
Typical boiler efficiencies range from about 90% for the best solid biomass fuel boilers to close to 95% for oil- and natural gas-fired boilers Table 3.2. The main reason for the poorer performance of biofuels is the high moisture content of the fuel which increases flue gas losses. Table 3.2.