Additional Equipment for Heat Transfer in Boilers
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Questions and Answers

What is the principal energy transfer medium that industry depends on for its process applications?

  • Steam (correct)
  • Electricity
  • Wind energy
  • Solar power
  • Why is heat essential in hydrocarbon processing?

  • To separate and chemically alter hydrocarbon feedstocks (correct)
  • To reduce the volatility of hydrocarbons
  • To cool down the hydrocarbons
  • To increase carbon emissions
  • What is the purpose of the ammonia compression refrigeration cycle?

  • To remove impurities from hydrocarbon feedstocks
  • To provide cooling through compression and expansion of ammonia (correct)
  • To extract natural gas from crude oil
  • To increase the pressure of steam in industrial operations
  • Why do plants in different industries use common equipment configurations for thermal processing?

    <p>To reduce costs and streamline operations</p> Signup and view all the answers

    What is a common feedstock for thermal processes mentioned in the text?

    <p>Natural gas (both sweet and sour)</p> Signup and view all the answers

    Why does effectively managing thermal operations require the unique skill sets of a Power Engineer?

    <p>To optimize heating and cooling processes for efficiency</p> Signup and view all the answers

    What is the purpose of a molecular size reduction process?

    <p>To convert a large molecular size product into a smaller one in demand</p> Signup and view all the answers

    In gasoline manufacture, what effect does a more branched product have on the octane number?

    <p>Increases it</p> Signup and view all the answers

    What is the main purpose of a condensate return system in a boiler?

    <p>Sending condensate to a collection tank</p> Signup and view all the answers

    What is the function of a deaerator in the boiler system?

    <p>Strips oxygen and non-condensable gases from condensate</p> Signup and view all the answers

    What is the primary method for returning heat transfer fluids for reuse?

    <p>Simple filtering process</p> Signup and view all the answers

    How does chemical structure adjustment differ from molecular size reduction?

    <p>It rearranges the chemical structure of a compound</p> Signup and view all the answers

    What happens if condensate in a steam system is not returned?

    <p>Additional costs are incurred for makeup water and fuel</p> Signup and view all the answers

    Which equipment is used to increase the feedwater pressure above boiler pressure?

    <p>Boiler feed pumps</p> Signup and view all the answers

    In what industries are major Steam end-use equipment utilized according to Table 1?

    <p>Energy-intensive industries</p> Signup and view all the answers

    What is the main focus of extracting energy from post-combustion gases?

    <p>To preheat fuel and air streams</p> Signup and view all the answers

    What is the purpose of physical processes in industrial plants?

    <p>To cause physical changes without enacting a chemical change</p> Signup and view all the answers

    Which process involves separating compounds based on differential boiling points?

    <p>Distillation</p> Signup and view all the answers

    What is the purpose of the dilution process using steam?

    <p>To reduce solids buildup on heat exchangers</p> Signup and view all the answers

    In which process are unwanted contaminants pulled from a process fluid using steam?

    <p>Stripping</p> Signup and view all the answers

    What is the main goal of compression/cooling processes in industrial settings?

    <p>To separate components via their differing condensation temperatures</p> Signup and view all the answers

    Which process involves cooling a solution to separate crystalline substances?

    <p>Crystallization</p> Signup and view all the answers

    What is the purpose of solvent extraction in a petroleum refinery?

    <p>To separate components based on solubility differences</p> Signup and view all the answers

    In what type of processes are compounds converted into other compounds by chemical reactions?

    <p>Chemical processes</p> Signup and view all the answers

    What is a common outcome of drying/evaporation processes?

    <p>Formation of a dry solid or more concentrated liquid</p> Signup and view all the answers

    What role does pressure regulation with steam play in a reaction vessel?

    <p>Adjusting the pressure within the vessel</p> Signup and view all the answers

    What is the primary reason for the popularity of steam as an energy transfer medium?

    <p>High heat capacity</p> Signup and view all the answers

    In which form can energy be extracted from steam?

    <p>Both as mechanical work through a turbine and as heat for process heating</p> Signup and view all the answers

    What determines the choice between a steam system and a Heat Transfer Fluid (HTF) system?

    <p>System's required temperature</p> Signup and view all the answers

    What is the purpose of Heat Transfer Fluid (HTF) systems?

    <p>To circulate a special heat transfer liquid</p> Signup and view all the answers

    What is the primary role of qualified power engineers in managing steam and HTF systems?

    <p>To ensure efficient energy conversion</p> Signup and view all the answers

    What occurs in the 'Generation' segment of most industrial plants?

    <p>Energy is converted from one form to another</p> Signup and view all the answers

    Which type of equipment is used to generate steam?

    <p>Boiler or heat recovery steam generator (HRSG)</p> Signup and view all the answers

    What happens when compressed hydrocarbons are combusted in a furnace?

    <p>Production of heated gases used for thermal energy transfer</p> Signup and view all the answers

    What sets steam apart from Heat Transfer Fluid (HTF) in terms of energy transfer?

    <p>Steam transfers energy at a constant temperature, while HTF varies in temperature.</p> Signup and view all the answers

    What determines whether a Heat Transfer Fluid (HTF) system or a steam system is preferred?

    <p>The system's thermal requirements</p> Signup and view all the answers

    What is the purpose of a superheater in some boilers?

    <p>To increase the energy content of steam beyond saturation temperature</p> Signup and view all the answers

    How do combustion air preheaters (heat exchangers) function?

    <p>By transferring excess heat from end-use to incoming combustion air</p> Signup and view all the answers

    What is the main function of an economizer in a boiler system?

    <p>To recycle thermal energy in combustion gases</p> Signup and view all the answers

    Why is appropriate insulation important in thermal distribution systems?

    <p>To reduce the amount of heat lost to the plant's environment</p> Signup and view all the answers

    What do steam separators do in steam systems that generate wet steam?

    <p>Remove water droplets from wet steam using controlled centrifugal flow</p> Signup and view all the answers

    When might back-pressure turbines be used in a distribution system?

    <p>To extract some energy from high-pressure steam</p> Signup and view all the answers

    What do steam accumulators allow to be done with excess steam?

    <p>Discharge it into a pressure vessel partially filled with water</p> Signup and view all the answers

    Why are steam traps essential for a steam distribution system?

    <p>To minimize make-up steam by trapping air in equipment and lines during operation</p> Signup and view all the answers

    What affects the efficiency of a distribution system?

    <p>Thermal insulation, piping, and component separation technologies</p> Signup and view all the answers

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