Posted by gburns on February 12, 2000 at 14:31:26:
In Reply to: How can I measure the heating value of a boiler?(Boiler efficiency) posted by Ming-G on February 10, 2000 at 16:08:22:
In general plants do not utilize special equipment to measure the heat content of steam, fuel and feedwater. The for steam flow and feedwater flow the, pressure and temperature are used to determine the heat on a mass basis. The fuels are typically sent out for analysis to obtain the chemical makeup and the heating value.
There are several methods to measure a boilers efficiency. The simplest is the input/output method which just takes the difference between the heating value of the steam and the feedwater heating value and divides the result by the fuel heat input.
There are other methods such as the heat loss method that is more accurate as it back calculates fuel from steam produced and the O2 content and heating value of the flue gas leaving. I believe you can find this test method in the ASME Test Codes.
: I am working on my senior project, and it is about finding out methods of measuring the Boiler efficiency.
: I need to know how people measering the heating value of fuel, fuel flow, steam flow, heat content of fuel and heat content of feedwater. I need to know is there any equipments to measure boiler efficiency???