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Understanding Heat Engines: Fundamentals and Applications in Physics

This lesson plan for students in classes nine and ten at PDB High School, Sylhet, focuses on the concept of heat engines in physics. Over a 40-minute duration, the objectives include understanding the meaning and classification of heat engines, and describing them with images of different types such as airplane, train, and car engines. Activities involve individual work, group matching, and assessment questions about diagrams and efficiency. The lesson uses animations and textbook references to enhance learning and engagement in thermal machinery concepts.

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Understanding Heat Engines: Fundamentals and Applications in Physics

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  1. Project plan

  2. Project Overview Name : Md. Nazrul Islam Laskar Institution : PDB High school,Sylhet Learning area : Physics Class : Nine – Ten Class duration: 40 minutes Objectives : • They would able to say meaning of the heat engine. • They would able to say classification of heat engine. • They would able to describe the heat engine with image.

  3. Aero plane Train Car Aero plane Engine Car Engine Train Engine What are these engines called?

  4. Thermal Machine Chapter : Twelve Page No. : 169

  5. Look at this animation gently

  6. individual work Intake Compression Power Exhaust Time: 6 min. See the picture animation 1 minute, then silently read your text book page 170-171 (point 12.2)

  7. Group work Figure: a Figure: b 5 min. Each group will match them with others. Write them in the board (one student from each group) 6 min. Write some differences between Figure - a and b 2 min.

  8. Assessment Q: See this picture and write answer to the following question. Time : 1:46 1:47 1:48 1:49 1:50 1:51 1:52 1:53 1:54 1:55 1:56 1:28 1:45 1:44 1:57 1:42 1:43 1:31 1:32 1:33 1:34 1:35 1:30 1:37 1:38 1:39 1:40 1:36 1:29 1:14 1:41 1:26 1:27 1:25 1:24 1:23 1:22 1:21 1:20 1:19 1:18 1:17 1:16 1:15 1:13 1:12 1:58 1:10 1:11 1:59 2:00 1:00 1:01 1:03 1:02 1:05 1:06 1:07 1:08 1:09 1:04 0:48 0:46 0:47 0:49 0:55 0:51 0:52 0:53 0:54 0:29 0:56 0:50 0:45 0:38 0:42 0:41 0:40 0:39 0:37 0:36 0:35 0:34 0:33 0:32 0:31 0:57 0:44 0:43 0:30 0:11 0:28 0:59 0:16 0:17 0:18 0:26 0:19 0:22 0:21 0:23 0:24 0:25 0:15 0:20 0:58 0:14 0:12 0:10 0:09 0:08 0:06 0:05 0:04 0:03 0:02 0:01 End 0:27 0:13 0:07 (a) What is the name of the machine? (b) Write the words that the alphabet stands for?

  9. Match the answer: Time: 2 min. (b) Level diagram of this Petrol engine: (a) The name of this machine is Petrol engine. T = Petrol tank R = Float chamber V 1 &V2 = Valve I = Intake Valve E = Exhaust valve D = Combustion chamber C = Cylinder J = Carburetor P= Piston H = Main shaft

  10. Home Work Sours of heat of higher temperature (1000j) Heat transformed into mechanical energy Heat engine (600 j ) Receiver of heat at lower temperature Time: 4 min. What is heat engine? (b) What do you mean by “ The efficiency of petrol engine is 30% .” (c) What is the efficiency of the petrol engine shown in figure? (d) Describe with diagram the arrangement within the engine by which heat can be used for practical purpose ?

  11. Thanks

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