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"Fuel Utilization and Environmental Protection" Mechanical energy, internal energy and their conversion PPT courseware 2
Question: Do 1 kg of coal and 1 kg of liquefied petroleum gas generate the same amount of heat when burned? Which one releases more heat? Introduce the concept of calorific value, learn to look up calorific value tables, and become familiar with the physical meaning of calorific value.
Practice in class
The heat generated by complete combustion of 1.3 kg of gasoline is ______.
2. Fill in "> ” "=" "<".
0.2 kg calorific value of gasoline_____20 kg calorific value of gasoline;
0.1 kg calorific value of gasoline_____10 kg calorific value of alcohol;
The amount of heat produced by the complete combustion of 14 kg of gasoline______
The amount of heat produced by the complete combustion of 10 kg of hydrogen.
Question: Is the energy released when fuel is burned equal to the heat calculated based on the theoretical calorific value? Why?
Boiler efficiency is obtained by comparing mechanical efficiency: the ratio of the heat effectively utilized by the boiler to the heat released by complete combustion of the fuel.
Explain the sources of heat loss from boilers.
Describe the environmental impacts of fuel use.
When coal is burned, pollutants such as sulfur dioxide (SO2) and nitrogen dioxide (NO2) are emitted. These gases dissolve in rainwater and form acid rain.
The fuel used by cars is gasoline and diesel. The main pollutants in the exhaust gases they burn include carbon monoxide, unburned hydrocarbons, nitrogen oxides, lead compounds and soot.
The question leads to: How to improve the efficiency of the boiler?
How do you think energy should be used effectively and make feasible suggestions on related environmental protection issues.
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For more information about the PPT courseware "Mechanical Energy Internal Energy and Its Conversion into Fuel Utilization and Environmental Protection", please click the Mechanical Energy Internal Energy and Its Conversion ppt Fuel Utilization and Environmental Protection ppt tag.
"Fuel Utilization and Environmental Protection" Mechanical energy, internal energy and their conversion PPT courseware 5:
"Utilization of Fuels and Environmental Protection" Mechanical Energy, Internal Energy and Their Conversion PPT Courseware 5 Project Main Content Types of Fuels Fuels can be divided into three categories: ______, ______ and ______. Calorific value 1 kg of a certain fuel ______ time The amount of ______ energy that can be converted into ______ (put...
"Fuel Utilization and Environmental Protection" Mechanical energy, internal energy and their conversion PPT courseware 4:
"Fuel Utilization and Environmental Protection" Mechanical energy, internal energy and their conversion PPT courseware 4 Teaching objectives 1. Know the calorific value of fuel and its calculation 2. Understand what is the efficiency of heat engines and the main ways to improve heat engine efficiency 3. Know the boiler and the environment Protecting the relationship between fuel and its heat..
"Fuel Utilization and Environmental Protection" Mechanical energy, internal energy and their conversion PPT courseware 3:
"Fuel Utilization and Environmental Protection" Mechanical Energy, Internal Energy and Their Transformation PPT Courseware 3 Topic Background Internal energy is the largest amount of energy used by humans, and the main way to obtain internal energy currently is the combustion of fuel. Therefore, it is necessary for us to learn about fuel. ..