This public link is valid for 7 days and shares a thread, including any personal information you added. This link or copies made by others cannot be deleted. If you share with third parties, their policies apply. Can’t copy the link right now. Try again later. APPENDIX 1 MEASURING BOILER EFFICIENCY
PTC 4.1 uses specific specific heat equations for flue gases (CO2, N2, O2, CO, SO2). Newer codes sometimes use averaged values. For high-efficiency combined cycle plants, rounding is fine. For a coal plant running at 38% efficiency, a 0.5% change in loss calculation due to rounding errors is a million-dollar mistake. PTC 4.1 offers precision. Asme Ptc 4.1.pdf
From stoichiometry: ( W_dg \approx 17.5 ) lb dry gas / lb fuel ( C_p = 0.24 ) Btu/lb°F ( L_1 = \frac17.5 \times 0.24 \times (350-80)21500 \times 100 \approx 5.3% ) This public link is valid for 7 days
Formally titled "Steam Generating Units," ASME PTC 4.1 is a Code established by the American Society of Mechanical Engineers (ASME) Performance Test Codes (PTC) committee. Originally published in 1946 and revised most notably in 1964 (with reaffirmations thereafter), the 4.1 version specifically addresses the and Indirect Method (Heat Loss) for determining boiler efficiency. Can’t copy the link right now