Boiler Foundation Questions 10: Term Explanations: (A certain score will be given to the top 30)
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True or False: Lower heating value: When the hydrogen in a fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is the sum of the fuel’s heating value and the latent heat of the water vapor formed ( )
Lower heating value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is the sum of the heating value of the fuel and the latent heat of the water vapor (X)
Lower calorific value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower calorific value is the sum of the calorific value of the fuel and the latent heat of the water vapor (incorrect). Lower calorific value refers to the heat generated when coal burns under atmospheric pressure in air, minus the heat required to vaporize the moisture present in the coal – namely, the oxidation water produced by the burning of hydrogen in the organic components of the coal, as well as the free water and bound water present in it – leaving behind the actual amount of heat that can be utilized.
Lower heating value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is equal to the heating value of the fuel plus the latent heat of the water vapor (incorrect). Lower heating value = Heating value of the fuel + Latent heat of water vapor – Latent heat of water vapor in the smoke gases
Error, it should be the difference between --------.
Lower heating value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is the sum of the fuel’s heating value and the latent heat of the water vapor (Incorrect)
Lower heating value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is the sum of the heating value of the fuel and the latent heat of the water vapor (X)
Lower heating value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is the sum of the heating value of the fuel and the latent heat of the water vapor (incorrect)
Lower heating value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is the sum of the heating value of the fuel and the latent heat of the water vapor (incorrect)
Lower heating value: When the hydrogen in the fuel burns, it forms water vapor; the moisture present in the fuel also turns into water vapor. The lower heating value is the sum of the heating value of the fuel and the latent heat of the water vapor. It refers to the heat generated when coal burns under atmospheric pressure in air, minus the heat required to vaporize the moisture in the coal – namely, the oxidation water produced by the burning of hydrogen in the organic components of the coal, as well as the free water and bound water present in it – leaving behind the actual heat that can be utilized.