Gas boiler thermal efficiency problem
Boiler efficiency of positive equilibrium calculation = 347333 (MJ) / 407160 (MJ) ≈ 0.853 ≈ 85.3%
The total calorific value of the gas is: 37.7MJ / cubic × 10800 cubic = 407160 (MJ)
Evaporation of 140 tons of hot water required for 50 degrees: (2690.8-209.85) × 140000 = 347333000 (KJ) = 347333 (MJ)
Has been found saturated vapor pressure 0.4MPA (gauge pressure) enthalpy of 2690.8KJ / Kg; 50 ℃ water enthalpy: 209.85KJ / Kg;
2 tons of steam boiler, for the steam pressure 0.4MPA, evaporation of 140 tons of water consumption of 10800 cubic meters of gas, gas calorific value reported 37.7MJ / cubic, water temperature 50 degrees, I calculated the thermal efficiency was only 10 percent, that is a problem,
