Podcast Beta
Questions and Answers
What is the primary function of the heat exchanger in a boiler?
What is the term for the burning or rapid oxidation of a fuel that produces light and heat?
Why is it necessary to evaluate fuels and determine the best way to prepare and burn them?
What is a potential hazard of incomplete combustion?
Signup and view all the answers
What is a key factor in optimizing energy conversion in boilers?
Signup and view all the answers
What is the primary goal of understanding the combustion process in boilers?
Signup and view all the answers
What is a common characteristic of gaseous fuels like natural gas?
Signup and view all the answers
What is the purpose of oxygen in the combustion process?
Signup and view all the answers
What is the acronym NOCASH used for?
Signup and view all the answers
What is the result of hydrogen combining with oxygen in the combustion process?
Signup and view all the answers
Why is oxygen in a fuel used as an indicator of the amount of hydrogen unavailable for combustion?
Signup and view all the answers
What is the non-combustible component of a fuel that remains as a residue after combustion?
Signup and view all the answers
Why is it important to limit the release of NOX?
Signup and view all the answers
What is a characteristic of biomass fuels compared to hydrocarbon-based fuels?
Signup and view all the answers
What is the source of biomass fuels?
Signup and view all the answers
What is the typical percentage of nitrogen in wood waste?
Signup and view all the answers
What is the primary concern regarding the reaction products of combustion?
Signup and view all the answers
Why is nitrogen bound within the chemical makeup of the fuel a concern?
Signup and view all the answers
What is the purpose of increasing the fuel to air ratio in combustion?
Signup and view all the answers
What is the result of complete combustion of the fuel in the furnace?
Signup and view all the answers
What are the three conditions necessary for complete combustion, besides adequate air?
Signup and view all the answers
What is the result of incomplete combustion?
Signup and view all the answers
What is the equation for the complete combustion of sulfur?
Signup and view all the answers
Why is carbon monoxide a concern in combustion?
Signup and view all the answers
What is the purpose of treating combustion gases with chemicals?
Signup and view all the answers
What is the primary factor governing the design of a new combustion system?
Signup and view all the answers
What is the result of carbon monoxide combining with more oxygen before leaving the furnace?
Signup and view all the answers
What is the main concern when considering incomplete combustion?
Signup and view all the answers
What is the purpose of supplying excess air to the furnace?
Signup and view all the answers
What is the result of incomplete combustion of carbon in the fuel?
Signup and view all the answers
What is the effect of sulfur dioxide discharged into the atmosphere?
Signup and view all the answers
What is the percentage of oxygen in the air by volume?
Signup and view all the answers
What is the term for the amount of air required for complete combustion?
Signup and view all the answers
Why is the formation of free hydrogen undesirable?
Signup and view all the answers
What determines the amount of excess air required for proper combustion?
Signup and view all the answers
What is the result of the combustion of sulfur in the presence of water?
Signup and view all the answers
What is the primary effect of excess air on boiler efficiency?
Signup and view all the answers
What is the purpose of calculating the theoretical air requirement for a fuel?
Signup and view all the answers
What is the unit of measurement for the theoretical air requirement?
Signup and view all the answers
What is the molar ratio of carbon to oxygen in the combustion reaction?
Signup and view all the answers
What is the purpose of step 2 in calculating the theoretical air requirement?
Signup and view all the answers
What is the volume of oxygen occupied by one mole of any gas at standard temperature and pressure?
Signup and view all the answers
What is the result of incomplete combustion in a furnace?
Signup and view all the answers
What is the primary factor that determines the theoretical air requirement for a fuel?
Signup and view all the answers
What is the purpose of step 4 in calculating the theoretical air requirement?
Signup and view all the answers
What is the effect of reducing excess air in a furnace?
Signup and view all the answers
What is one of the regulated parameters for RDF emission management?
Signup and view all the answers
What is the purpose of a secondary air supply in RDF combustion?
Signup and view all the answers
Why is it necessary to maintain a minimum oxygen level at the outlet in RDF combustion?
Signup and view all the answers
What is the CCME's role in RDF management?
Signup and view all the answers
Why is carbon monoxide a concern in RDF combustion?
Signup and view all the answers
What is the percentage of oxygen in air by volume?
Signup and view all the answers
What is the ratio of total air to oxygen required to theoretically combust 100 kg of fuel?
Signup and view all the answers
What is the unit of measurement for theoretical air in an alternative calculation?
Signup and view all the answers
What is the molar ratio of carbon to oxygen in combustion?
Signup and view all the answers
What is the volume of one mole of any gas at standard temperature and pressure?
Signup and view all the answers
What is the purpose of excess air in combustion?
Signup and view all the answers
What is the primary component of flue gas that comes from combustion air?
Signup and view all the answers
What is the term for the nitrogen oxides produced during combustion?
Signup and view all the answers
What is the significance of the difference in theoretical air requirements between solid and liquid fuels?
Signup and view all the answers
What is the purpose of analyzing the flue gas in combustion?
Signup and view all the answers
What is the primary source of nitrogen that enters a furnace?
Signup and view all the answers
Why is it important to reduce excess air to a minimum in the combustion process?
Signup and view all the answers
What determines the ideal amount of excess air required for complete combustion?
Signup and view all the answers
What is a consequence of a shortage of combustion air in a boiler room?
Signup and view all the answers
What is the purpose of outside air supply openings in boiler rooms?
Signup and view all the answers
What is the primary component of coal that is not combustible?
Signup and view all the answers
What is the main difference in the analysis of solid fuels compared to liquid or gaseous fuels?
Signup and view all the answers
What is the term used to describe the combustion product of sulfur in coal?
Signup and view all the answers
What is the purpose of proximate analysis of solid fuels?
Signup and view all the answers
Which type of fuel is wood byproduct considered?
Signup and view all the answers
Why is coal recognized as being a significant contributor to atmospheric pollution?
Signup and view all the answers
What is the purpose of crushing wood pieces to produce hog fuel?
Signup and view all the answers
What is the purpose of ultimate analysis of solid fuels?
Signup and view all the answers
Which type of facility burns MSW in a single combustion chamber with excess air?
Signup and view all the answers
What can cause the formation of 'hoar frost' on building air inlet screens?
Signup and view all the answers
What is the benefit of burning MSW in terms of methane generation?
Signup and view all the answers
What is the term used to describe the materials that are sourced from grasses and straw?
Signup and view all the answers
What is the purpose of mechanical methods in Refuse Derived Fuel Systems?
Signup and view all the answers
Why are coal, oil, and gas considered more concentrated and easier to transport than wood?
Signup and view all the answers
What is the primary reason for the decline of wood as a fuel source?
Signup and view all the answers
What is the primary purpose of understanding the combustion process in power engineering?
Signup and view all the answers
What is the result of incomplete combustion in terms of energy efficiency?
Signup and view all the answers
Why is it necessary to evaluate the chemical and physical properties of fuels?
Signup and view all the answers
What is the term for the rapid oxidation of a fuel that produces light and heat?
Signup and view all the answers
What is a potential hazard of incomplete combustion?
Signup and view all the answers
Why is it important for Power Engineers to fully understand the combustion process?
Signup and view all the answers
What is the primary reason for assuming that nitrogen in the air is non-reactive at combustion temperatures?
Signup and view all the answers
What is the main difference between gaseous fuels and liquid or solid fuels?
Signup and view all the answers
What is the purpose of the NOCASH acronym in fuel analysis?
Signup and view all the answers
What is the result of the chemical combination of hydrogen and oxygen prior to combustion in a solid fuel?
Signup and view all the answers
Why is ash considered a non-combustible component of a fuel?
Signup and view all the answers
What is the primary reason for limiting the release of NOX in combustion?
Signup and view all the answers
What is the primary source of biomass fuels?
Signup and view all the answers
What is the result of the combustion of hydrogen with oxygen in a fuel?
Signup and view all the answers
What is the difference between fuel-based nitrogen and nitrogen in the air?
Signup and view all the answers
What is the purpose of analyzing the moisture content of a fuel?
Signup and view all the answers
What is the primary reason why the release of NOX is of greatest concern?
Signup and view all the answers
What is the purpose of treating combustion gases with chemicals?
Signup and view all the answers
What is the result of incomplete combustion in a furnace?
Signup and view all the answers
What is the primary factor that governs the design of a new combustion system?
Signup and view all the answers
What is the purpose of ensuring complete combustion of the fuel in the furnace?
Signup and view all the answers
What is the term used to describe the combustion products of sulfur?
Signup and view all the answers
What is the result of the reaction between hydrogen and oxygen during complete combustion?
Signup and view all the answers
What is the primary concern regarding the reaction products of combustion?
Signup and view all the answers
What is the purpose of increasing the fuel to air ratio in combustion?
Signup and view all the answers
What is the result of the reaction between carbon and oxygen during complete combustion?
Signup and view all the answers
What is the main reason for ensuring combustion processes are driven to completion?
Signup and view all the answers
What is the primary factor that determines the ideal amount of excess air required for complete combustion?
Signup and view all the answers
What is the result of the incomplete combustion of carbon in the fuel?
Signup and view all the answers
Why is the formation of free sulfur undesirable?
Signup and view all the answers
What is the purpose of supplying excess air to the furnace?
Signup and view all the answers
What is the effect of the sulfur dioxide discharged into the atmosphere?
Signup and view all the answers
What is the result of the combustion of carbon monoxide with more oxygen?
Signup and view all the answers
Why is the formation of carbon monoxide a concern in combustion?
Signup and view all the answers
What is the term used to describe the amount of air required for complete combustion?
Signup and view all the answers
Why is it necessary to ensure that combustion processes are driven to completion?
Signup and view all the answers
What is the total volume of air required to theoretically combust 100 kg of the fuel, given the ratio of total air to O2 is 4.76?
Signup and view all the answers
What is the primary factor governing the calculation of theoretical air requirement for a fuel?
Signup and view all the answers
What is the molar ratio of hydrogen to oxygen in the combustion reaction?
Signup and view all the answers
What is the volume of one mole of any gas at standard temperature and pressure?
Signup and view all the answers
What is the molar ratio of hydrogen to oxygen in the combustion reaction of hydrogen?
Signup and view all the answers
What is the purpose of calculating the theoretical air requirement for a fuel?
Signup and view all the answers
What is the purpose of calculating the theoretical air requirement for a fuel?
Signup and view all the answers
What is the result of multiplying the moles of oxygen required by the volume of one mole of oxygen (22.4 L/mol) in the calculation of theoretical air?
Signup and view all the answers
What is the term for the amount of air required for complete combustion?
Signup and view all the answers
What is the element that reacts with oxygen in the combustion reaction with a molar ratio of 1:1?
Signup and view all the answers
What is the primary factor that determines the theoretical air requirement for a fuel?
Signup and view all the answers
What is the result of incomplete combustion in terms of energy efficiency?
Signup and view all the answers
What is the significance of the theoretical air requirement calculation?
Signup and view all the answers
What is the primary source of nitrogen that enters a furnace?
Signup and view all the answers
What is the unit of measurement for the theoretical air requirement?
Signup and view all the answers
What is the purpose of step 1 in calculating the theoretical air requirement?
Signup and view all the answers
What is the purpose of excess air in combustion?
Signup and view all the answers
What is the effect of reducing excess air to a minimum in the combustion process?
Signup and view all the answers
What is the term for the nitrogen oxides produced during combustion?
Signup and view all the answers
What is the primary reason for calculating the theoretical air requirement for a fuel?
Signup and view all the answers
What is the minimum temperature required to ensure the destruction of organics in RDF combustion?
Signup and view all the answers
What is the minimum retention time required after combustion has completed in RDF combustion?
Signup and view all the answers
What is the minimum oxygen level required at the outlet in RDF combustion to minimize quenching or mixing problems?
Signup and view all the answers
What is the purpose of ensuring efficient mixing between burning waste and incoming air in RDF combustion?
Signup and view all the answers
What is the purpose of regulating the secondary air supply in RDF combustion?
Signup and view all the answers
What is the primary reason for reducing excess air to a minimum in the combustion process?
Signup and view all the answers
What is the consequence of a shortage of combustion air in a boiler room?
Signup and view all the answers
What is the purpose of proximate analysis of solid fuels?
Signup and view all the answers
What is the primary factor that determines the ideal amount of excess air required for complete combustion?
Signup and view all the answers
What is the result of incomplete combustion of carbon in the fuel?
Signup and view all the answers
What is the purpose of supplying outside air to boiler rooms?
Signup and view all the answers
What is the significance of nitrogen in the combustion process?
Signup and view all the answers
What is the consequence of inadequate combustion air supply in a boiler room?
Signup and view all the answers
What is the purpose of ultimate analysis of solid fuels?
Signup and view all the answers
What is the primary concern regarding the reaction products of combustion?
Signup and view all the answers
What is the primary component of coal that is combustible?
Signup and view all the answers
What is the term used to describe the hydrocarbons formed from the combination of hydrogen with some of the carbon in coal?
Signup and view all the answers
What is the primary advantage of using coal, oil, and gas over wood as a fuel source?
Signup and view all the answers
What is the purpose of Refuse Derived Fuel Systems in Municipal Solid Waste combustion?
Signup and view all the answers
What is the benefit of burning Municipal Solid Waste in terms of landfills?
Signup and view all the answers
What is the term used to describe the collective term for wood residues, bark, chips, and sawdust?
Signup and view all the answers
What is the primary concern regarding the combustion of sulfur in coal?
Signup and view all the answers
What is the primary advantage of using biomass fuels over fossil fuels?
Signup and view all the answers
What is the primary purpose of calculating the theoretical air requirement for a fuel?
Signup and view all the answers
What is the primary component of coal that is considered an impurity?
Signup and view all the answers