3 main points about heat engine :p

In General, a heat engine is a SYSTEM in which:

point 1.   It absorbs heat from a Higher Temperature Source

point 2.   It converts some of this energy into work

point 3.   It rejects the remainder energy to a Lower Temperature sink

Remember:

There is no machine or engine that works 100% efficient because not all the heat that is absorbed is converted into work.

learn more!

Everyday examples of heat engine:)

1. Steam engine - a heat engine that performs mechanical work using steam as its working fluid. 

   Stationary applications

   Stationary steam engines can be classified into two main types:
   
   1. Winding engines, rolling mill engines, steam donkeys, marine engines.
   2. Engines providing power, which rarely stop and do not need to reverse. 

   Transport applications

   A steam locomotive- a GNR N2 Class No.1744 at Weybourne nr. Sheringham, Norfolk.
   Steam engines have been used to power a wide array of transport appliances.
                                                                                                                   
2. Diesel engine - also known as a compression-ignition engine is an internal combustion engine that uses the heat of compression to initiate ignition to burn the fuel, which is injected into the combustion chamber during the final stage of compression.             

   * Passenger cars

   

   diesel engine

   * Railroad rolling stock

   Diesel engines have eclipsed steam engines as the prime mover on all non-electrified railroads in the industrialized world. 

   * Other transport uses

   Larger transport applications (trucks, buses, etc.) also benefit from the diesel's reliability and high torque output.

   * Military fuel standardisation

   NATO has a single vehicle fuel policy and has selected diesel for this purpose. 
   
   
3.  Internal combustion engine - an engine in which the combustion of a fuel occurs with an oxidizer (usually air) in a combustion chamber.

   

   automobile engine

   Applications:                      
                                                                                                                                                                                         Internal combustion engines are most commonly used for mobile propulsion in vehicles and portable machinery.                                                                                   
   
   
   Generally using fossil fuel (mainly petroleum), these engines have appeared in transport in almost all vehicles (automobiles, trucks, motorcycles, boats, and in a wide variety of aircraft and locomotives).
   
   
   Where very high power-to-weight ratios are required, internal combustion engines appear in the form of gas turbines. 
   
   
   
   

   
   

Welcome to our Eblog! :D

• This Educational blog serves as our project for Physics IV.

Furthermore, we would like you all to learn about Heat Engines, especially those 4th year students out there who are also taking this lesson. (:

I hope we could share our knowledge from what we've also learn 

from our great Physics teacher Sir Jonatz! =)

Thank you Sir :p

Sir Jonathan Briones

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What is Heat Engine?

In thermodynamics, a heat engine performs the conversion of heat energy to mechanical work by exploiting the temperature gradient between a hot "source" and a cold "sink". 

Heat is transferred from the source, through the "working body" of the engine, to the sink, and in this process some of the heat is converted into work by exploiting the properties of a working substance (usually a gas or liquid).